/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #10b981;
    --secondary-dark: #059669;
    --accent: #f59e0b;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    
    /* Neutral Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Z-Index */
    --z-header: 100;
    --z-nav: 100;
    --z-popup: 200;
    --z-toast: 300;
}

/* Dark Mode */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
    overflow-x: hidden;
    overscroll-behavior: none;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Screen Management ===== */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: flex;
    flex-direction: column;
}

.view {
    display: none;
    padding: var(--spacing-md);
    padding-bottom: calc(80px + var(--spacing-md));
    animation: fadeIn 0.3s ease;
    overflow-x: hidden;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Loading Screen ===== */
#loading-screen {
    justify-content: center;
    align-items: center;
    background: var(--gradient-primary);
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-logo {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    margin: 0 auto var(--spacing-md);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Auth Screen ===== */
#auth-screen {
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo {
    font-size: 56px;
    margin-bottom: var(--spacing-md);
}

.auth-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.auth-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.auth-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-tertiary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-lg);
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn.active {
    background: var(--bg-card);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-group input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-card);
    transition: border-color var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-md);
    text-align: center;
}

.hidden {
    display: none !important;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: var(--danger-dark);
}

.btn-full {
    width: 100%;
}

/* Dev Tools Reset Grid */
.dev-reset-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    margin-top: 12px;
}

.dev-reset-grid .btn {
    padding: 10px 8px;
    font-size: 13px;
}

.dev-reset-grid .btn span {
    display: block;
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-lg);
    border-radius: var(--radius-lg);
}

.btn-loader {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ===== Header ===== */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: var(--z-header);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-logo {
    font-size: 28px;
}

.header-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.streak-badge, .points-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.header-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    transition: transform 0.2s;
}

.header-avatar:active {
    transform: scale(0.95);
}

/* ===== Loading Modal (Fullscreen) ===== */
.loading-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease;
}

.loading-modal.hidden {
    display: none;
}

.loading-modal-content {
    text-align: center;
    color: white;
}

.loading-modal-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.loading-modal-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.loading-modal-content p {
    font-size: var(--font-size-md);
    opacity: 0.9;
}

/* ===== Home View ===== */
.home-hero {
    margin-bottom: var(--spacing-lg);
}

.user-greeting {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.user-avatar {
    font-size: 48px;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.greeting-text {
    display: flex;
    flex-direction: column;
}

.greeting-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.user-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.level-card {
    background: var(--gradient-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    color: white;
}

.level-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.level-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.level-number {
    font-size: var(--font-size-2xl);
    font-weight: 800;
}

.user-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
}

.title-icon {
    font-size: var(--font-size-lg);
}

.title-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.next-rank-info {
    font-size: var(--font-size-xs);
    opacity: 0.8;
    text-align: center;
    margin-top: var(--spacing-xs);
}

.xp-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.xp-progress {
    height: 100%;
    background: white;
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.xp-text {
    font-size: var(--font-size-xs);
    opacity: 0.9;
    text-align: right;
}

/* Daily Quiz Section */
.daily-quiz-section {
    margin-bottom: var(--spacing-xl);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.section-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.date-badge {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
}

.daily-progress-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
}

.progress-ring-container {
    position: relative;
    width: 100px;
    height: 100px;
    flex-shrink: 0;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 8;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--primary);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 264;
    stroke-dashoffset: 264;
    transition: stroke-dashoffset var(--transition-slow);
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.progress-info {
    flex: 1;
}

.progress-label {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.progress-points {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--primary);
}

.btn-start-quiz {
    width: 100%;
}

/* Quick Stats Grid (im Stats-Tab) */
.quick-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.quick-stats-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.stat-item-icon {
    font-size: 24px;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.stat-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.stat-icon {
    font-size: 28px;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    display: block;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* ===== Quiz View ===== */
#quiz-view {
    padding: 0;
    padding-bottom: 0;
    background: var(--bg-secondary);
    min-height: 100vh;
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.btn-back {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.btn-back:hover {
    background: var(--border-color);
}

.quiz-progress {
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.quiz-timer {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-secondary);
}

.quiz-content {
    padding: var(--spacing-lg);
    padding-bottom: 200px;
    max-width: 600px;
    margin: 0 auto;
}

.question-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-lg);
}

.question-category {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.category-icon {
    font-size: 24px;
}

.category-name {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    flex: 1;
}

.difficulty-badge {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-weight: 600;
}

.multiplier-badge {
    font-size: var(--font-size-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    color: white;
    font-weight: 700;
}

.question-text {
    font-size: var(--font-size-lg);
    font-weight: 600;
    line-height: 1.6;
    color: var(--text-primary);
}

.answers-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.answer-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.answer-btn:focus {
    outline: none;
    border-color: var(--border-color);
}

.answer-btn:focus-visible {
    outline: none;
}

/* Hover nur für Geräte mit Maus (nicht Touch) */
@media (hover: hover) and (pointer: fine) {
    .answer-btn:hover:not(:disabled) {
        border-color: var(--primary);
        background: rgba(99, 102, 241, 0.05);
    }
}

.answer-btn:disabled {
    cursor: default;
}

.answer-btn.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.answer-btn.correct {
    border-color: var(--secondary);
    background: rgba(16, 185, 129, 0.1);
}

.answer-btn.wrong {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.answer-letter {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.answer-btn.selected .answer-letter {
    background: var(--primary);
    color: white;
}

.answer-btn.correct .answer-letter {
    background: var(--secondary);
    color: white;
}

.answer-btn.wrong .answer-letter {
    background: var(--danger);
    color: white;
}

.answer-text {
    flex: 1;
}

/* Feedback Card */
.feedback-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.feedback-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
}

.feedback-card.correct .feedback-icon {
    color: var(--secondary);
}

.feedback-card.wrong .feedback-icon {
    color: var(--danger);
}

.feedback-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feedback-card.correct .feedback-text {
    color: var(--secondary);
}

.feedback-card.wrong .feedback-text {
    color: var(--danger);
}

.feedback-points {
    font-size: var(--font-size-lg);
    color: var(--primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.xp-breakdown {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    font-weight: 400;
    opacity: 0.9;
}

.feedback-card.correct .xp-breakdown {
    color: var(--success);
}

.feedback-explanation {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

/* ===== Stats View ===== */
.view-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.view-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 800;
}

.stats-overview {
    margin-bottom: var(--spacing-xl);
}

.big-stat-card {
    background: var(--gradient-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    text-align: center;
    color: white;
    margin-bottom: var(--spacing-md);
}

/* ===== Stats Hero Card ===== */
.stats-hero-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
    color: white;
    position: relative;
    overflow: hidden;
}

.stats-hero-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 80%;
    height: 150%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.stats-hero-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.stats-hero-points {
    text-align: left;
}

.stats-hero-value {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.stats-hero-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

.stats-hero-rank {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-top: var(--spacing-sm);
    backdrop-filter: blur(10px);
}

.stats-hero-streak {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.streak-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: rgba(255,255,255,0.15);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    backdrop-filter: blur(10px);
}

.streak-badge .streak-icon {
    font-size: 1rem;
}

.streak-badge .streak-value {
    font-weight: 700;
    font-size: var(--font-size-md);
}

.streak-badge .streak-label {
    font-size: 0.7rem;
    opacity: 0.9;
}

.stats-hero-grid {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 320px;
    height: 220px;
    margin: 0 auto;
}

/* Pentagon Layout - 5 Items im Kreis */
.stats-hero-item {
    background: rgba(255,255,255,0.15);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all var(--transition-fast);
    position: absolute;
    width: 75px;
}

/* Pentagon Positionen (oben startend, im Uhrzeigersinn) */
.stats-hero-item:nth-child(1) {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
}

.stats-hero-item:nth-child(2) {
    top: 30%;
    right: 0;
}

.stats-hero-item:nth-child(3) {
    bottom: 0;
    right: 15%;
}

.stats-hero-item:nth-child(4) {
    bottom: 0;
    left: 15%;
}

.stats-hero-item:nth-child(5) {
    top: 30%;
    left: 0;
}

@media (max-width: 400px) {
    .stats-hero-grid {
        max-width: 280px;
        height: 200px;
    }
    
    .stats-hero-item {
        width: 65px;
        padding: var(--spacing-xs);
    }
    
    .stats-hero-main {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .stats-hero-streak {
        flex-direction: row;
        flex-wrap: wrap;
    }
}

.stats-hero-item:hover {
    background: rgba(255,255,255,0.25);
}

.stats-hero-item-icon {
    font-size: 1.1rem;
    margin-bottom: 2px;
}

.stats-hero-item-value {
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.2;
}

.stats-hero-item-label {
    font-size: 0.65rem;
    opacity: 0.9;
    margin-top: 2px;
}

/* Legacy - keeping for backwards compatibility */
.big-stat-card {
    display: none;
}

.stats-grid-4 {
    display: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.stat-item-mini {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-item-mini .stat-item-value {
    font-size: var(--font-size-lg);
}

.stat-item-mini .stat-item-label {
    font-size: 10px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.stat-item {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-item-value {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
}

.stat-item-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.streak-card {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.streak-item {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.streak-item-icon {
    font-size: 32px;
    display: block;
    margin-bottom: var(--spacing-sm);
}

.streak-item-value {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-primary);
}

.streak-item-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.category-stats-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.category-stats-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

/* ===== Modern Category Stats ===== */

/* Hero Progress Card */
.category-hero-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
    position: relative;
    overflow: hidden;
}

.category-hero-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    pointer-events: none;
}

.category-hero-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.category-hero-circle {
    position: relative;
    width: 100px;
    height: 100px;
    flex-shrink: 0;
}

.category-hero-circle svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.category-hero-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.2);
    stroke-width: 8;
}

.category-hero-progress {
    fill: none;
    stroke: white;
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dasharray 1s ease-out;
}

.category-hero-value {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.category-hero-info {
    flex: 1;
    color: white;
}

.category-hero-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.category-hero-subtitle {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-sm);
}

.category-hero-badges {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
}

.hero-badge.played {
    background: rgba(255, 255, 255, 0.25);
    color: white;
}

.hero-badge.unplayed {
    background: rgba(255, 255, 255, 0.15);
    color: rgba(255, 255, 255, 0.9);
}

/* Filter Tabs */
.category-filter-tabs {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.category-filter-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-filter-tab:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.category-filter-tab.active {
    background: var(--bg-card);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.category-filter-tab .tab-count {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
}

.category-filter-tab.active .tab-count {
    background: var(--primary);
    color: white;
}

/* Category Grid */
.category-grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: var(--spacing-md);
}

@media (max-width: 400px) {
    .category-grid-container {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
}

/* Category Card */
.category-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    animation: cardFadeIn 0.4s ease-out backwards;
    border: 2px solid transparent;
    cursor: default;
    position: relative;
    overflow: hidden;
}

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.category-card.excellent {
    border-color: #10b981;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.category-card.good {
    border-color: #3b82f6;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.category-card.medium {
    border-color: #f59e0b;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(245, 158, 11, 0.05) 100%);
}

.category-card.needs-work {
    border-color: #ef4444;
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(239, 68, 68, 0.05) 100%);
}

.category-card.neutral {
    border-color: var(--border-color);
    opacity: 0.7;
}

.category-card.neutral:hover {
    opacity: 1;
    border-color: var(--primary);
}

.category-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.category-card-icon {
    font-size: 2rem;
    line-height: 1;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.category-card-status {
    font-size: 1rem;
}

.category-card-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.category-card-name {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text-primary);
    line-height: 1.2;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.category-card-stats {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.category-card-accuracy {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.category-card.excellent .category-card-accuracy {
    background: linear-gradient(135deg, #10b981, #059669);
    -webkit-background-clip: text;
    background-clip: text;
}

.category-card.good .category-card-accuracy {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    -webkit-background-clip: text;
    background-clip: text;
}

.category-card.medium .category-card-accuracy {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    -webkit-background-clip: text;
    background-clip: text;
}

.category-card.needs-work .category-card-accuracy {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    -webkit-background-clip: text;
    background-clip: text;
}

.category-card-details {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.category-card-progress {
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-top: var(--spacing-xs);
}

.category-card-progress-fill {
    height: 100%;
    border-radius: var(--radius-full);
    transition: width 0.6s ease-out;
}

.category-card.excellent .category-card-progress-fill {
    background: linear-gradient(90deg, #10b981, #34d399);
}

.category-card.good .category-card-progress-fill {
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
}

.category-card.medium .category-card-progress-fill {
    background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.category-card.needs-work .category-card-progress-fill {
    background: linear-gradient(90deg, #ef4444, #f87171);
}

.category-card-new {
    text-align: center;
    padding: var(--spacing-sm) 0;
}

.category-card-new span {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* Legacy styles - keeping for backwards compatibility */
.category-stat-item {
    display: none;
}

/* ===== Leaderboard View ===== */
.leaderboard-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    background: var(--bg-tertiary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-lg);
}

.leaderboard-tab {
    flex: 1;
    padding: var(--spacing-sm);
    border: none;
    background: transparent;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.leaderboard-tab.active {
    background: var(--bg-card);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.leaderboard-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.leaderboard-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.leaderboard-item.top-3 {
    background: var(--gradient-accent);
    color: white;
}

.leaderboard-item.top-3:nth-child(1) {
    background: linear-gradient(135deg, #ffd700 0%, #ffed4a 100%);
    color: #92400e;
}

.leaderboard-item.top-3:nth-child(2) {
    background: linear-gradient(135deg, #c0c0c0 0%, #e2e8f0 100%);
    color: #475569;
}

.leaderboard-item.top-3:nth-child(3) {
    background: linear-gradient(135deg, #cd7f32 0%, #d4a574 100%);
    color: #7c2d12;
}

.leaderboard-rank {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-weight: 800;
    font-size: var(--font-size-sm);
}

.leaderboard-item.top-3 .leaderboard-rank {
    background: rgba(255, 255, 255, 0.3);
}

.leaderboard-avatar {
    font-size: 28px;
}

.leaderboard-info {
    flex: 1;
}

.leaderboard-name {
    font-weight: 600;
    font-size: var(--font-size-base);
}

.leaderboard-stats {
    font-size: var(--font-size-xs);
    opacity: 0.7;
}

.leaderboard-points {
    font-weight: 800;
    font-size: var(--font-size-lg);
}

.leaderboard-item.current-user {
    border: 2px solid var(--primary);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    flex-wrap: wrap;
}

.pagination-btn {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.pagination-btn:hover:not(:disabled) {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-1px);
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.pagination-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.4);
}

.pagination-prev,
.pagination-next {
    font-size: 1.2rem;
    font-weight: 400;
}

.pagination-dots {
    color: var(--text-secondary);
    padding: 0 var(--spacing-xs);
    user-select: none;
}

.pagination-info {
    width: 100%;
    text-align: center;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* ===== Achievements View ===== */
.achievements-count {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-full);
}

.achievements-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.achievement-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.achievement-card.locked {
    opacity: 0.5;
    filter: grayscale(1);
}

.achievement-card.earned {
    border: 2px solid var(--secondary);
}

.achievement-icon {
    font-size: 40px;
    margin-bottom: var(--spacing-sm);
}

.achievement-name {
    font-weight: 700;
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xs);
}

.achievement-description {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.achievement-date {
    font-size: var(--font-size-xs);
    color: var(--secondary);
    margin-top: var(--spacing-sm);
}

/* ===== Profile View ===== */
.profile-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.profile-avatar {
    font-size: 64px;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.profile-info h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.profile-info p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.profile-title {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    color: white;
    font-size: var(--font-size-sm);
}

.profile-title-icon {
    font-size: var(--font-size-base);
}

.profile-title-name {
    font-weight: 600;
}

.settings-section, .categories-section {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.settings-section h3, .categories-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-label {
    font-weight: 500;
}

.setting-description {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.setting-select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

/* Toggle Switch */
.toggle {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
}

.toggle input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-tertiary);
    transition: var(--transition-fast);
    border-radius: var(--radius-full);
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
}

.toggle input:checked + .toggle-slider {
    background: var(--gradient-primary);
}

.toggle input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

/* Avatar Picker */
.avatar-picker {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.avatar-option {
    width: 44px;
    height: 44px;
    border: 2px solid var(--border-color);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 24px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.avatar-option:hover,
.avatar-option.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

/* Categories Picker */
.categories-picker {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.category-option {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-option:hover,
.category-option.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.category-option-icon {
    font-size: 20px;
}

.category-option-name {
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ===== Bottom Navigation ===== */
.bottom-nav {
    display: flex;
    justify-content: space-around;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    padding-bottom: max(var(--spacing-sm), env(safe-area-inset-bottom));
    z-index: var(--z-nav);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: var(--spacing-sm);
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition-fast);
    flex: 1;
}

.nav-item.active {
    color: var(--primary);
}

.nav-icon {
    font-size: 24px;
}

.nav-label {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* ===== Toast Notifications ===== */
#toast-container {
    position: fixed;
    top: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
    width: calc(100% - var(--spacing-lg) * 2);
    max-width: 400px;
}

.toast {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    pointer-events: auto;
    animation: toastIn 0.3s ease;
}

.toast.toast-out {
    animation: toastOut 0.3s ease forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
    to { opacity: 0; transform: translateY(-20px); }
}

.toast-icon {
    font-size: 24px;
}

.toast-message {
    flex: 1;
    font-size: var(--font-size-sm);
}

.toast.success {
    border-left: 4px solid var(--secondary);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast.info {
    border-left: 4px solid var(--primary);
}

/* ===== Popup ===== */
.popup {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: var(--z-popup);
    padding: var(--spacing-lg);
    animation: popupIn 0.3s ease;
}

.popup.hidden {
    display: none;
}

@keyframes popupIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.popup-content {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    max-width: 350px;
    width: 100%;
    text-align: center;
    animation: popupContentIn 0.3s ease;
}

@keyframes popupContentIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.achievement-unlocked .achievement-icon {
    font-size: 72px;
    margin-bottom: var(--spacing-md);
    animation: bounce 0.5s ease infinite alternate;
}

@keyframes bounce {
    from { transform: translateY(0); }
    to { transform: translateY(-10px); }
}

.achievement-unlocked h3 {
    font-size: var(--font-size-lg);
    color: var(--secondary);
    margin-bottom: var(--spacing-sm);
}

.achievement-unlocked .achievement-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.achievement-unlocked .achievement-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ===== Responsive ===== */
@media (min-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .achievements-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .categories-picker {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    #main-app {
        max-width: 600px;
        margin: 0 auto;
        box-shadow: var(--shadow-xl);
        min-height: 100vh;
    }
    
    .bottom-nav {
        max-width: 600px;
        left: 50%;
        transform: translateX(-50%);
    }
}

/* ===== Animations ===== */
.shake {
    animation: shake 0.5s ease;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-10px); }
    40%, 80% { transform: translateX(10px); }
}

.celebrate {
    animation: celebrate 0.5s ease;
}

@keyframes celebrate {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* ===== Game Modes Section ===== */
.game-modes-section {
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.game-modes-section h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    text-align: center;
}

.game-modes-section.hidden {
    display: none;
}

/* Bonus-Runden Section */
.bonus-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: calc(-1 * var(--spacing-sm));
    margin-bottom: var(--spacing-md);
}

/* Bonus Cards Container */
.bonus-cards-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.bonus-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
}

.bonus-card.completed {
    border-color: var(--success);
}

.bonus-card-header {
    padding: var(--spacing-sm) var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.bonus-card-header.bonus {
    background: linear-gradient(135deg, #8b5cf6 0%, #a78bfa 100%);
}

.bonus-card-header.blitz {
    background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
}

.bonus-card-header.marathon {
    background: linear-gradient(135deg, #10b981 0%, #34d399 100%);
}

.bonus-card-icon {
    font-size: 1.25rem;
}

.bonus-card-title {
    font-size: var(--font-size-sm);
    font-weight: 700;
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.bonus-card-body {
    padding: var(--spacing-md) var(--spacing-sm);
    text-align: center;
}

.bonus-card-score {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}

.bonus-card.completed .bonus-card-score {
    color: var(--success);
}

.bonus-card-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bonus-card-questions {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    font-weight: 600;
}

.bonus-card.completed .bonus-card-questions {
    color: var(--success);
}

.bonus-card-badge {
    font-size: 10px;
    color: var(--text-tertiary);
    padding: var(--spacing-xs);
    background: var(--bg-secondary);
    text-align: center;
    border-top: 1px solid var(--border-color);
}

/* Bonus Buttons */
.bonus-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.btn-bonus-mode {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.btn-bonus-mode:active {
    transform: scale(0.98);
}

.btn-bonus-mode.bonus {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
}

.btn-bonus-mode.bonus:hover {
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
}

.btn-bonus-mode.blitz {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.btn-bonus-mode.blitz:hover {
    background: linear-gradient(135deg, #d97706 0%, #b45309 100%);
}

.btn-bonus-mode.marathon {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.btn-bonus-mode.marathon:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.btn-bonus-icon {
    font-size: 1.25rem;
}

.btn-bonus-text {
    flex: 1;
}

/* Verstecke Buttons wenn Modus bereits gespielt */
.btn-bonus-mode.played {
    display: none !important;
}

/* === Immer Spielen Section === */
.always-play-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--bg-tertiary);
}

.always-play-section h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.always-play-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.always-play-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    border: 2px solid transparent;
}

.always-play-card:active {
    transform: scale(0.98);
}

.always-card-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.always-play-card[data-mode="endless"] .always-card-icon {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.always-play-card[data-mode="review"] .always-card-icon {
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
}

.always-play-card[data-mode="weakspot"] .always-card-icon {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
}

.always-card-content {
    flex: 1;
}

.always-card-content h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: 2px;
    color: var(--text-primary);
}

.always-card-content p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.always-card-content .xp-badge {
    display: inline-block;
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-secondary);
}

.always-card-content .xp-badge.training {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
    color: white;
    opacity: 0.8;
}

.review-count-badge {
    position: absolute;
    top: -6px;
    right: -6px;
    background: var(--error);
    color: white;
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.always-play-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.always-play-card.disabled:hover {
    transform: none;
    box-shadow: var(--shadow-sm);
    border-color: transparent;
}

/* Endlos-Modus Header */
.endless-header {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    z-index: 100;
    box-shadow: var(--shadow-md);
    animation: pulse 2s ease-in-out infinite;
}

.endless-icon {
    font-size: 1.25rem;
}

.endless-label {
    font-size: var(--font-size-sm);
}

/* Spielmodi-Buttons erben vom Standard-Button */
.mode-card {
    width: 100%;
    margin-bottom: 4px;
}

.mode-card:active {
    transform: scale(0.97);
    opacity: 0.9;
}

/* Blitz Mode specific styles */
.blitz-timer {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xl);
    font-weight: 700;
    box-shadow: var(--shadow-lg);
    z-index: 150;
}

.blitz-timer.warning {
    animation: pulse 0.5s ease infinite;
}

@keyframes pulse {
    0%, 100% { transform: translateX(-50%) scale(1); }
    50% { transform: translateX(-50%) scale(1.1); }
}

/* Marathon Counter */
.marathon-counter {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-lg);
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    z-index: 150;
}

/* Mode Result Overlay */
.mode-result-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-popup);
    animation: fadeIn 0.3s ease;
}

.mode-result-overlay.hidden {
    display: none;
}

.mode-result-card {
    background: var(--bg-card);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-align: center;
    max-width: 90%;
    width: 350px;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(50px); }
    to { opacity: 1; transform: translateY(0); }
}

.result-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
}

.result-title {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.result-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.result-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.result-stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--primary);
}

.result-stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.result-message {
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
}

.result-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.result-actions .btn {
    min-width: 120px;
}

/* Category Selection Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-popup);
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    max-width: 90%;
    width: 400px;
    max-height: 80vh;
    overflow-y: auto;
}

.modal-content h2 {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.modal-header h2 {
    margin: 0;
    font-size: var(--font-size-xl);
}

.modal-close {
    background: var(--bg-tertiary);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    font-size: 18px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--danger);
    color: white;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.category-select-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.category-select-btn:hover {
    border-color: var(--primary);
    background: var(--bg-secondary);
}

.category-select-btn span:first-child {
    font-size: 28px;
}

.category-select-btn span:last-child {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 500;
}

/* Difficulty Badge Colors */
.difficulty-badge.leicht {
    background: #4CAF50;
}

.difficulty-badge.mittel {
    background: #FF9800;
}

.difficulty-badge.schwer {
    background: #f44336;
}

.difficulty-badge.experte {
    background: linear-gradient(135deg, #9C27B0, #E040FB);
    animation: glow 2s ease infinite;
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px rgba(156, 39, 176, 0.5); }
    50% { box-shadow: 0 0 20px rgba(156, 39, 176, 0.8); }
}

/* ===== Admin Panel ===== */
.admin-header {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    background: linear-gradient(135deg, var(--primary), #f97316);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    color: white;
}

.admin-header h2 {
    margin: 0;
    font-size: 1.5rem;
}

.admin-subtitle {
    margin: var(--spacing-xs) 0 0;
    opacity: 0.9;
    font-size: var(--font-size-sm);
}

/* ===== ADMIN ACCORDION ===== */
.admin-accordion {
    margin-bottom: var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.accordion-header {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: background var(--transition-fast);
}

.accordion-header:hover {
    background: var(--bg-hover);
}

.accordion-header.open {
    background: var(--bg-hover);
    border-bottom: 1px solid var(--border-color);
}

.accordion-icon {
    font-size: 1.25rem;
}

.accordion-title {
    flex: 1;
    text-align: left;
}

.accordion-arrow {
    font-size: 0.75rem;
    transition: transform var(--transition-fast);
    color: var(--text-muted);
}

.accordion-header.open .accordion-arrow {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 var(--spacing-md);
}

.accordion-content.open {
    max-height: 3000px;
    padding: var(--spacing-md);
}

.accordion-description {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin: 0 0 var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px dashed var(--border-color);
}

/* Admin Stats Grid */
.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.admin-stat-card {
    background: linear-gradient(135deg, var(--bg-hover), var(--bg-card));
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-color);
}

.admin-stat-card .stat-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.admin-stat-card .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: block;
}

.admin-stat-card .stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ===== API Cost Tracking ===== */
.api-cost-filters {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    flex-wrap: nowrap;
}

.api-cost-filters .btn-sm {
    flex: 1;
    padding: 6px 8px;
    font-size: var(--font-size-xs);
    white-space: nowrap;
    text-align: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.api-cost-filters .btn-sm:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.api-cost-filters .btn-sm.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.api-cost-summary {
    margin-bottom: var(--spacing-md);
}

.api-cost-main {
    background: linear-gradient(135deg, var(--success) 0%, #10b981 100%);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.api-cost-main .cost-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.api-cost-main .cost-value {
    font-size: 2rem;
    font-weight: 700;
    display: block;
}

.api-cost-main .cost-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.api-cost-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.api-cost-card {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid var(--border-color);
}

.api-cost-card .cost-value {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--primary);
    display: block;
}

.api-cost-card .cost-label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.api-model-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.model-badge {
    background: var(--primary);
    color: white;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.model-success {
    font-size: var(--font-size-sm);
    color: var(--success);
    font-weight: 500;
}

.api-daily-breakdown h4 {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.api-daily-list {
    max-height: 200px;
    overflow-y: auto;
}

.api-daily-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
    font-size: var(--font-size-sm);
}

.api-daily-item:last-child {
    border-bottom: none;
}

.api-daily-item .date {
    color: var(--text-secondary);
}

.api-daily-item .stats {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.api-daily-item .cost {
    font-weight: 600;
    color: var(--success);
}

/* ===== KI-Modell Auswahl ===== */
.ai-model-selection {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.ai-model-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

.ai-model-card:hover {
    border-color: var(--primary-light);
    background: var(--bg-tertiary);
}

.ai-model-card.selected {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.model-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.model-header input[type="radio"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

.model-header label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    flex: 1;
}

.model-name {
    font-weight: 600;
    font-size: var(--font-size-md);
    color: var(--text-primary);
}

.model-badge {
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.model-badge.recommended {
    background: var(--success);
    color: white;
}

.model-badge.newest {
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
    color: white;
}

.model-badge.reasoning {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
    color: white;
}

.model-badge.expensive {
    background: linear-gradient(135deg, #f43f5e, #e11d48);
    color: white;
}

.model-badge.premium {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
}

.model-badge.budget {
    background: var(--info);
    color: white;
}

.model-badge.legacy {
    background: var(--text-muted);
    color: white;
}

.model-details {
    padding-left: 26px;
}

.model-pricing {
    display: flex;
    gap: var(--spacing-md);
    font-size: var(--font-size-xs);
    margin-bottom: var(--spacing-xs);
}

.price-input, .price-output {
    color: var(--text-muted);
}

.model-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.model-pros-cons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.model-pros-cons .pro, 
.model-pros-cons .con {
    font-size: var(--font-size-xs);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

.model-pros-cons .pro {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.model-pros-cons .con {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger);
}

.ai-model-cost-estimate {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    border: 1px solid var(--border-color);
}

.ai-model-cost-estimate h4 {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.cost-estimate-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary);
}

.cost-estimate-hint {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* AI Model Actions */
.ai-model-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    justify-content: center;
}

.ai-model-actions button {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

#save-ai-model-btn {
    background: var(--primary);
    color: white;
    border: none;
}

#save-ai-model-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

#test-ai-model-btn {
    background: var(--surface);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

#test-ai-model-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

#test-ai-model-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* AI Test Result */
.ai-test-result {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    display: none;
}

.ai-test-result.visible {
    display: block;
    animation: fadeIn 0.3s ease;
}

.test-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.test-result-model {
    font-weight: 700;
    color: var(--primary);
    font-size: var(--font-size-lg);
}

.test-result-question {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 500;
    line-height: 1.5;
}

.test-result-answers {
    display: grid;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.test-answer {
    padding: var(--spacing-md);
    border-radius: var(--radius);
    border: 2px solid var(--border-color);
    background: var(--background);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.test-answer.correct {
    border-color: var(--success);
    background: rgba(46, 204, 113, 0.1);
}

.test-answer.correct::before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.test-answer.wrong {
    border-color: var(--danger);
    background: rgba(231, 76, 60, 0.05);
    opacity: 0.8;
}

.test-answer.wrong::before {
    content: '✗';
    color: var(--danger);
    font-weight: 700;
}

.test-result-explanation {
    background: rgba(52, 152, 219, 0.1);
    border-left: 4px solid var(--info);
    padding: var(--spacing-md);
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: var(--spacing-md);
}

.test-result-explanation h4 {
    color: var(--info);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
}

.test-result-explanation p {
    color: var(--text-primary);
    line-height: 1.6;
}

.test-result-meta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.test-meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.test-meta-item .label {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-transform: uppercase;
}

.test-meta-item .value {
    font-weight: 600;
    color: var(--text-primary);
}

.admin-stat-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-sm);
}

.admin-stat-row .stat-value {
    font-weight: 600;
    color: var(--primary);
}

/* Admin Search Box */
.admin-search-box {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.admin-search-box input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.admin-search-box input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Admin User Cards */
.admin-users-list, .admin-questions-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.admin-user-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-hover);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.admin-user-card.banned {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
}

.admin-user-card .user-avatar {
    font-size: 2rem;
}

.admin-user-card .user-info {
    flex: 1;
}

.admin-user-card .user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.admin-user-card .user-email {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.admin-user-card .user-stats {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Admin Question Cards */
.admin-question-card {
    padding: var(--spacing-md);
    background: var(--bg-hover);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.admin-question-card.problematic {
    border-left: 3px solid #f97316;
}

.admin-question-card .question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.admin-question-card .question-category {
    font-size: var(--font-size-xs);
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
}

.admin-question-card .success-rate {
    font-size: var(--font-size-xs);
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

.admin-question-card .success-rate.warning {
    background: rgba(249, 115, 22, 0.2);
    color: #f97316;
}

.admin-question-card .success-rate.critical {
    background: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.admin-question-card .question-text {
    font-weight: 500;
    margin: var(--spacing-sm) 0;
    line-height: 1.4;
}

.admin-question-card .question-answers {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin: var(--spacing-sm) 0;
}

.admin-question-card .answer {
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
}

.admin-question-card .answer.correct {
    background: rgba(16, 185, 129, 0.15);
    color: var(--secondary);
    font-weight: 500;
}

.admin-question-card .question-meta {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
}

.admin-question-card .question-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

/* Admin Settings */
.admin-setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.admin-setting-item label {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.admin-setting-item input[type="number"],
.admin-setting-item select {
    width: 100px;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    text-align: center;
}

.setting-hint {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    text-align: center;
    margin-top: var(--spacing-sm);
    font-style: italic;
}

/* Developer Mode Styles */
.dev-date-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(139, 92, 246, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.toggle-switch {
    position: relative;
    width: 50px;
    height: 26px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--border-color);
    transition: var(--transition-fast);
    border-radius: 26px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: var(--transition-fast);
    border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
    background: var(--primary);
}

.toggle-switch input:checked + .toggle-slider:before {
    transform: translateX(24px);
}

.toggle-label {
    font-weight: 600;
    color: var(--text-primary);
}

.dev-date-controls {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.dev-date-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.dev-date-label {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.dev-date-value {
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--primary);
    font-family: var(--font-mono);
}

.dev-date-buttons {
    display: flex;
    gap: var(--spacing-xs);
}

.dev-date-buttons .btn {
    flex: 1;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
}

/* Small Buttons */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
}

.btn-success {
    background: var(--secondary);
    color: white;
}

.btn-success:hover {
    background: #059669;
}

/* Helper Text Styles */
.loading-text, .empty-text, .error-text, .hint-text {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.error-text {
    color: var(--danger);
}

/* Dev Reset Grid (jetzt im Admin) */
.dev-reset-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

/* === Tageszusammenfassung Card === */
.day-summary-card {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    color: white;
    box-shadow: var(--shadow-lg);
}

.day-summary-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.day-summary-icon {
    font-size: 1.25rem;
}

.day-summary-header h3 {
    font-size: var(--font-size-md);
    font-weight: 700;
    margin: 0;
    color: white;
}

.day-summary-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.day-summary-main {
    text-align: center;
    padding: var(--spacing-sm) 0;
}

.day-summary-score {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--spacing-xs);
    font-weight: 800;
}

.day-summary-score .earned-points {
    font-size: 2rem;
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.day-summary-score .separator {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.5);
}

.day-summary-score .max-points {
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
}

.day-summary-label {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 2px;
}

.day-summary-percentage {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: #fbbf24;
    margin-top: 2px;
}

.day-summary-progress {
    padding: 0;
}

.day-summary-bar {
    height: 8px;
    background: rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.day-summary-fill {
    height: 100%;
    background: linear-gradient(90deg, #fbbf24 0%, #f59e0b 50%, #10b981 100%);
    border-radius: var(--radius-full);
    transition: width 0.5s ease;
    width: 0%;
}

.day-summary-breakdown {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xs);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255,255,255,0.1);
}

.breakdown-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    background: rgba(255,255,255,0.1);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
}

.breakdown-icon {
    font-size: 0.875rem;
}

.breakdown-label {
    font-size: var(--font-size-xs);
    color: rgba(255,255,255,0.7);
}

.breakdown-value {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: white;
}

/* ===== Category Management ===== */
.category-create-form {
    background: var(--bg-hover);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.category-create-form h4 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.category-form-grid {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.category-form-grid .form-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.category-form-grid .form-field.flex-grow {
    flex: 1;
}

.category-form-grid .form-field label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.category-form-grid .form-field input {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.category-form-grid .icon-input {
    width: 60px;
    text-align: center;
    font-size: 1.2rem;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: var(--spacing-sm);
}

.form-field label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.form-field label .hint {
    color: var(--text-muted);
    font-weight: normal;
}

.form-field input {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-field input[readonly] {
    background: var(--bg-tertiary);
    color: var(--text-muted);
}

.category-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.category-list-header h4 {
    margin: 0;
}

.category-count {
    background: var(--primary);
    color: white;
    padding: 2px 10px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.migration-warning {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(249, 115, 22, 0.15);
    border: 1px solid rgba(249, 115, 22, 0.3);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.migration-warning.hidden {
    display: none;
}

.migration-warning .warning-icon {
    font-size: 1.5rem;
}

.migration-warning .warning-text strong {
    display: block;
    color: #f97316;
    margin-bottom: 4px;
}

.migration-warning .warning-text p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.category-filter {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.category-filter .btn-sm {
    padding: 4px 12px;
    font-size: var(--font-size-xs);
}

.category-filter .btn-sm.active {
    background: var(--primary);
    color: white;
}

.admin-categories-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 400px;
    overflow-y: auto;
}

.admin-category-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.admin-category-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.admin-category-card.inactive {
    opacity: 0.6;
    background: var(--bg-hover);
}

.admin-category-card .cat-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-hover);
    border-radius: var(--radius-md);
}

.admin-category-card .cat-info {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    overflow: hidden;
}

.admin-category-card .cat-name {
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 1;
    min-width: 0;
}

.admin-category-card .inactive-badge {
    font-size: var(--font-size-xs);
    padding: 2px 6px;
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
    border-radius: var(--radius-full);
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

.admin-category-card .config-badge {
    font-size: var(--font-size-xs);
    padding: 2px 6px;
    background: rgba(249, 115, 22, 0.2);
    color: #f97316;
    border-radius: var(--radius-full);
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

.admin-category-card.from-config {
    border-style: dashed;
    opacity: 0.8;
}

.admin-category-card .cat-code {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    font-family: monospace;
}

.admin-category-card .cat-count-badge {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--primary);
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.admin-category-card .cat-stats {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 2px;
}

.admin-category-card .cat-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.admin-category-card .cat-actions .btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.admin-category-card .cat-actions .btn-icon:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.admin-category-card .cat-actions .btn-icon.btn-danger:hover {
    background: var(--danger);
    border-color: var(--danger);
}

.admin-category-card .cat-actions .btn-icon.btn-toggle.active {
    background: var(--secondary);
    color: white;
    border-color: var(--secondary);
}

/* Category Edit Modal */
.category-edit-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-md);
}

.category-edit-modal.hidden {
    display: none;
}

.category-edit-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
}

.category-edit-content h3 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--text-primary);
}

.category-edit-content .form-group {
    margin-bottom: var(--spacing-md);
}

.category-edit-content .form-group label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.category-edit-content .form-group input,
.category-edit-content .form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.category-edit-content .modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.category-edit-content .modal-actions .btn {
    flex: 1;
}

/* =============================================
   FRAGEN-FORTSCHRITT CARD
   ============================================= */
.questions-progress-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    color: white;
}

.progress-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.progress-card-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    color: white;
}

.progress-percent {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: white;
}

.progress-bar-container {
    height: 12px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.progress-bar-fill {
    height: 100%;
    background: white;
    border-radius: 6px;
    transition: width 0.5s ease;
    width: 0%;
}

.progress-stats {
    display: flex;
    justify-content: space-around;
    text-align: center;
}

.progress-stat {
    display: flex;
    flex-direction: column;
}

.progress-stat-value {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: white;
}

.progress-stat-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.8);
}

/* =============================================
   XP-TIMELINE CARD
   ============================================= */
.xp-timeline-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    color: white;
}

.xp-timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.xp-timeline-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    color: white;
}

.xp-timeline-tabs {
    display: flex;
    gap: var(--spacing-xs);
}

.xp-tab {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.xp-tab:hover {
    background: rgba(255, 255, 255, 0.3);
}

.xp-tab.active {
    background: white;
    color: #8b5cf6;
}

.xp-tab-content {
    display: none;
}

.xp-tab-content.active {
    display: block;
}

/* Daily Chart */
.xp-daily-chart {
    padding: var(--spacing-sm) 0;
}

.xp-chart-legend {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.9);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.legend-color.points-bar {
    background: rgba(255, 255, 255, 0.9);
}

.legend-color.xp-bar {
    background: #4ade80;
}

.xp-chart-bars.dual-bars {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-end;
    height: 120px;
    justify-content: space-around;
}

.xp-day-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    max-width: 60px;
}

.xp-day-values {
    display: flex;
    gap: 2px;
    font-size: 9px;
    font-weight: 600;
    min-height: 14px;
}

.value-points {
    color: rgba(255, 255, 255, 0.9);
}

.value-xp {
    color: #4ade80;
}

.xp-day-dual {
    display: flex;
    gap: 2px;
    align-items: flex-end;
    height: 100%;
}

.bar-points {
    width: 16px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: height 0.3s ease;
    min-height: 0;
}

.bar-xp {
    width: 16px;
    background: #4ade80;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: height 0.3s ease;
    min-height: 0;
}

.xp-day-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.8);
}

.xp-day-value {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: white;
}

/* Activity List */
.xp-activity-list {
    max-height: 300px;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
}

.xp-activity-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.xp-activity-item:last-child {
    border-bottom: none;
}

.xp-activity-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    background: rgba(255, 255, 255, 0.2);
}

.xp-activity-info {
    flex: 1;
}

.xp-activity-title {
    font-size: var(--font-size-sm);
    color: white;
    font-weight: 500;
}

.xp-activity-meta {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
}

.xp-activity-points {
    text-align: right;
}

.xp-activity-points-main {
    font-weight: 700;
    color: #fbbf24;
    font-size: var(--font-size-sm);
}

.xp-activity-points-xp {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.8);
}

/* Achievement XP List */
.xp-achievements-list {
    max-height: 300px;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: var(--spacing-xs);
}

.xp-achievement-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.xp-achievement-item:last-child {
    border-bottom: none;
}

.xp-achievement-icon {
    font-size: 24px;
}

.xp-achievement-info {
    flex: 1;
}

.xp-achievement-name {
    font-size: var(--font-size-sm);
    color: white;
    font-weight: 500;
}

.xp-achievement-date {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.7);
}

.xp-achievement-points {
    font-weight: 700;
    color: #fbbf24;
    font-size: var(--font-size-sm);
}

.xp-empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: rgba(255, 255, 255, 0.8);
}

.xp-empty-state .empty-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

/* =========================================
   DESKTOP LAYOUT (min-width: 1024px)
   ========================================= */

@media (min-width: 1024px) {
    /* Root Anpassungen für Desktop */
    :root {
        --spacing-lg: 32px;
        --spacing-xl: 48px;
        --spacing-2xl: 64px;
    }
    
    /* App Container zentriert mit max-width */
    #app {
        background: var(--bg-tertiary);
    }
    
    /* Main App Layout */
    #main-app {
        max-width: 1400px;
        margin: 0 auto;
        background: var(--bg-secondary);
        box-shadow: 0 0 60px rgba(0, 0, 0, 0.1);
        min-height: 100vh;
    }
    
    /* Header breiter und mit mehr Padding */
    .app-header {
        padding: var(--spacing-md) var(--spacing-xl);
        background: var(--bg-card);
        border-bottom: 1px solid var(--border-color);
    }
    
    .header-logo {
        font-size: 32px;
    }
    
    .header-title {
        font-size: var(--font-size-xl);
    }
    
    .streak-badge, .points-badge {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    .header-avatar {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }
    
    /* View Padding und Layout - ALLE VIEWS GLEICHE BREITE */
    .view {
        padding: var(--spacing-xl);
        padding-bottom: calc(80px + var(--spacing-xl));
        width: 1100px;
        max-width: calc(100% - 48px);
        margin: 0 auto;
        overflow-x: hidden;
        box-sizing: border-box;
    }
    
    /* Sicherstellen dass nur aktive Views sichtbar sind */
    .view:not(.active) {
        display: none !important;
    }
    
    /* Alle aktiven Views - einheitlicher Block-Display als Standard */
    .view.active {
        display: block;
    }
    
    /* ===== HOME VIEW DESKTOP ===== */
    /* Home View - direkte Kinder als Grid anordnen */
    #home-view.active {
        display: grid;
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto;
        gap: var(--spacing-xl);
        align-items: stretch;
    }
    
    /* Level Card - volle Breite oben links */
    .home-hero {
        grid-column: 1;
        grid-row: 1;
        margin-bottom: 0;
    }
    
    .level-card {
        padding: var(--spacing-xl);
        border-radius: var(--radius-xl);
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    
    .level-number {
        font-size: var(--font-size-3xl);
    }
    
    .user-title {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    /* Daily Quiz Section - rechts oben */
    .daily-quiz-section {
        grid-column: 2;
        grid-row: 1;
        margin-bottom: 0;
        background: var(--bg-card);
        padding: var(--spacing-xl);
        border-radius: var(--radius-xl);
        box-shadow: var(--shadow-md);
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    
    .daily-progress-card {
        padding: var(--spacing-lg);
        background: var(--bg-tertiary);
        border-radius: var(--radius-lg);
        box-shadow: none;
    }
    
    .progress-ring-container {
        width: 120px;
        height: 120px;
    }
    
    .progress-ring-container svg {
        width: 120px;
        height: 120px;
    }
    
    .progress-ring-container svg circle {
        cx: 60;
        cy: 60;
        r: 52;
    }
    
    .btn-start-quiz {
        font-size: var(--font-size-lg);
        padding: var(--spacing-lg) var(--spacing-xl);
    }
    
    /* Game Modes Section - volle Breite unten */
    .game-modes-section {
        grid-column: 1 / -1;
        grid-row: 2;
        background: var(--bg-card);
        padding: var(--spacing-xl);
        border-radius: var(--radius-xl);
        box-shadow: var(--shadow-md);
    }
    
    .game-modes-section.hidden {
        display: none !important;
    }
    
    .game-modes-section h3 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .bonus-subtitle {
        margin-bottom: var(--spacing-lg);
    }
    
    /* Day Summary Card Desktop */
    .day-summary-card {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        padding: var(--spacing-xl);
        border-radius: var(--radius-xl);
        margin-bottom: var(--spacing-xl);
    }
    
    .day-summary-body {
        display: grid;
        grid-template-columns: 1fr 2fr 1fr;
        gap: var(--spacing-xl);
        align-items: center;
    }
    
    .day-summary-breakdown {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-md);
    }
    
    /* Bonus Cards Grid */
    .bonus-cards-container {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-lg);
    }
    
    .bonus-card {
        min-height: 200px;
        display: flex;
        flex-direction: column;
        border-radius: var(--radius-lg);
        overflow: hidden;
    }
    
    .bonus-card-body {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    
    /* Bonus Buttons nebeneinander */
    .bonus-buttons {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
        margin-top: var(--spacing-lg);
    }
    
    .btn-bonus-mode {
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }
    
    /* Always Play Section */
    .always-play-section {
        margin-top: var(--spacing-xl);
        padding-top: var(--spacing-xl);
        border-top: 1px solid var(--border-color);
    }
    
    /* Always Play Cards Grid */
    .always-play-cards {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
    
    .always-play-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-xl);
        border-radius: var(--radius-lg);
        min-height: 180px;
        justify-content: center;
    }
    
    .always-card-icon {
        font-size: 48px;
        margin-bottom: var(--spacing-md);
    }
    
    .always-card-content h4 {
        font-size: var(--font-size-lg);
        margin-bottom: var(--spacing-xs);
    }
    
    /* ===== QUIZ VIEW DESKTOP ===== */
    /* Quiz Content - volle Breite nutzen */
    
    .quiz-header {
        padding: var(--spacing-lg) var(--spacing-xl);
    }
    
    .quiz-content {
        padding: var(--spacing-xl);
    }
    
    .question-card {
        padding: var(--spacing-2xl);
        margin-bottom: var(--spacing-xl);
        border-radius: var(--radius-xl);
    }
    
    .question-text {
        font-size: var(--font-size-2xl);
    }
    
    /* Antworten 2x2 Grid */
    .answers-container {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .answer-btn {
        padding: var(--spacing-xl);
        font-size: var(--font-size-lg);
        border-radius: var(--radius-lg);
    }
    
    .answer-letter {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-base);
    }
    
    .feedback-card {
        padding: var(--spacing-2xl);
        max-width: 600px;
        margin: 0 auto;
    }
    
    .feedback-icon {
        font-size: 80px;
    }
    
    .feedback-text {
        font-size: var(--font-size-2xl);
    }
    
    /* Mode Result Desktop */
    .mode-result-card {
        padding: var(--spacing-2xl);
        max-width: 500px;
        border-radius: var(--radius-xl);
    }
    
    .result-stats {
        gap: var(--spacing-2xl);
    }
    
    /* ===== STATS VIEW DESKTOP ===== */
    
    .stats-hero-card {
        padding: var(--spacing-xl);
        border-radius: var(--radius-xl);
    }
    
    .stats-hero-value {
        font-size: 4rem;
    }
    
    /* Stats Grid 4 Spalten */
    .mini-stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-md);
    }
    
    .mini-stat-card {
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }
    
    /* Heatmap breiter */
    .heatmap-container {
        padding: var(--spacing-xl);
        border-radius: var(--radius-xl);
    }
    
    /* Category Stats Grid */
    .category-stats-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .category-grid-container {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .category-card {
        padding: var(--spacing-lg);
    }
    
    /* ===== ACHIEVEMENTS VIEW DESKTOP ===== */
    
    .achievements-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
    
    .achievement-card {
        padding: var(--spacing-xl);
        border-radius: var(--radius-lg);
    }
    
    /* ===== LEADERBOARD VIEW DESKTOP ===== */
    
    .leaderboard-card {
        padding: var(--spacing-lg);
        border-radius: var(--radius-lg);
    }
    
    /* ===== PROFILE VIEW DESKTOP ===== */
    /* Profile View - direkte Kinder als Grid */
    #profile-view.active {
        display: grid;
        grid-template-columns: 350px 1fr;
        grid-template-rows: auto auto auto;
        gap: var(--spacing-xl);
        align-items: start;
    }
    
    /* Profile Header links oben */
    #profile-view .profile-header {
        grid-column: 1;
        grid-row: 1 / 3;
    }
    
    /* Settings rechts */
    #profile-view .settings-section {
        grid-column: 2;
        grid-row: 1;
    }
    
    /* Logout Button unten rechts */
    #profile-view .btn-danger {
        grid-column: 2;
        grid-row: 2;
        max-width: 300px;
    }
    
    .profile-header-card {
        grid-column: 1;
        position: sticky;
        top: 80px;
        border-radius: var(--radius-xl);
    }
    
    .profile-settings {
        grid-column: 2;
    }
    
    .setting-card {
        padding: var(--spacing-xl);
        border-radius: var(--radius-lg);
        margin-bottom: var(--spacing-lg);
    }
    
    /* ===== ADMIN VIEW DESKTOP ===== */
    
    /* ===== BOTTOM NAVIGATION DESKTOP ===== */
    .bottom-nav {
        max-width: 1400px;
        margin: 0 auto;
        left: 50%;
        transform: translateX(-50%);
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        padding: var(--spacing-sm) var(--spacing-xl);
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    }
    
    .nav-item {
        padding: var(--spacing-sm) var(--spacing-lg);
        border-radius: var(--radius-md);
        transition: all var(--transition-fast);
    }
    
    .nav-item:hover {
        background: var(--bg-tertiary);
    }
    
    .nav-item.active {
        background: rgba(99, 102, 241, 0.1);
    }
    
    .nav-label {
        display: block;
        font-size: var(--font-size-xs);
        margin-top: var(--spacing-xs);
    }
    
    /* ===== AUTH SCREEN DESKTOP ===== */
    #auth-screen {
        background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    }
    
    .auth-container {
        background: var(--bg-card);
        padding: var(--spacing-2xl);
        border-radius: var(--radius-xl);
        box-shadow: var(--shadow-xl);
        max-width: 450px;
    }
    
    .auth-logo {
        font-size: 72px;
    }
    
    .auth-header h1 {
        font-size: var(--font-size-3xl);
    }
    
    /* ===== MODALS DESKTOP ===== */
    .modal-content {
        max-width: 600px;
        padding: var(--spacing-2xl);
    }
    
    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    /* ===== ADMIN VIEW DESKTOP ===== */
    #admin-view {
        max-width: 1100px;
        margin: 0 auto;
        padding: var(--spacing-xl);
    }
    
    /* Stats Grid 4 Spalten */
    .admin-stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-md);
    }
    
    .admin-stat-card {
        padding: var(--spacing-lg);
    }
    
    .admin-stat-card .stat-value {
        font-size: 1.75rem;
    }
    
    /* KI Modell Cards 2x2 */
    .ai-model-selection {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    /* Form-Elemente */
    #admin-view .admin-setting-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    #admin-view .admin-setting-item:last-of-type {
        border-bottom: none;
    }
    
    #admin-view .admin-setting-item label {
        font-weight: 500;
        font-size: var(--font-size-base);
    }
    
    #admin-view .admin-setting-item input[type="number"],
    #admin-view .admin-setting-item select {
        width: 150px;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    /* Search Box */
    #admin-view .admin-search-box {
        display: flex;
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-md);
    }
    
    #admin-view .admin-search-box input {
        flex: 1;
    }
    
    /* Kategorien Form Grid */
    #admin-view .category-form-grid {
        display: flex;
        gap: var(--spacing-md);
        align-items: flex-end;
    }
    
    #admin-view .category-form-grid .form-field.flex-grow {
        flex: 1;
    }
    
    #admin-view .icon-input {
        width: 70px;
        text-align: center;
        font-size: 1.5rem;
    }
    
    /* Buttons */
    #admin-view .btn-full {
        max-width: 300px;
    }

    /* ===== TOAST DESKTOP ===== */
    #toast-container {
        bottom: 100px;
        left: 50%;
        transform: translateX(-50%);
        max-width: 500px;
    }
    
    /* ===== DEV TOOLS DESKTOP ===== */
    .dev-tools-panel {
        max-width: 400px;
        right: var(--spacing-xl);
        bottom: 100px;
    }
}

/* Extra Large Desktop (1440px+) */
@media (min-width: 1440px) {
    #main-app {
        max-width: 1600px;
    }
    
    .view {
        max-width: 1400px;
    }
    
    #home-view {
        grid-template-columns: 1fr 1.2fr;
    }
    
    .bonus-cards-container {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .achievements-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .mini-stats-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* Ultra Wide Desktop (1920px+) */
@media (min-width: 1920px) {
    #main-app {
        max-width: 1800px;
    }
    
    .view {
        max-width: 1600px;
        padding: var(--spacing-2xl);
    }
    
    .level-card {
        padding: var(--spacing-2xl);
    }
    
    .daily-quiz-section {
        padding: var(--spacing-2xl);
    }
    
    .question-card {
        padding: var(--spacing-2xl) calc(var(--spacing-2xl) * 1.5);
    }
    
    .question-text {
        font-size: var(--font-size-3xl);
    }
}