/* ============================================
   KI-Folien-Generator - Course Player Styles
   Inspiriert von admin-intelligence.ch
   ============================================ */

/* ===== CSS VARIABLES ===== */
:root {
    /* Primary Colors - LMS Wizard Brand */
    --primary-gradient-start: #0071e3;
    --primary-gradient-end: #2997ff;
    --primary-dark: #0055b3;
    --primary-light: #00d4ff;
    
    /* Dark Theme */
    --carbon-black: #0a0a0a;
    --carbon-dark: #121212;
    --carbon-medium: #1a1a1a;
    --carbon-light: #2a2a2a;
    --metal-dark: #3a3a3a;
    --metal-light: #4a4a4a;
    
    /* Accent Colors */
    --accent-purple: #7c3aed;
    --accent-cyan: #00d4ff;
    --accent-green: #00ff88;
    --accent-blue: #0071e3;
    --accent-red: #ff3333;
    --accent-gold: #ffd700;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-dim: #808080;
    
    /* UI Elements */
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --border-radius-lg: 24px;
    --transition-speed: 0.3s;
    --transition-smooth: cubic-bezier(0.4, 0.0, 0.2, 1);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(0, 113, 227, 0.4);
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--carbon-black);
    color: var(--text-primary);
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* ===== ANIMATED BACKGROUND ===== */
.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        repeating-linear-gradient(0deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.02) 2px,
            rgba(255, 255, 255, 0.02) 4px),
        repeating-linear-gradient(90deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.02) 2px,
            rgba(255, 255, 255, 0.02) 4px);
    z-index: -2;
}

.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at 50% 0%,
        rgba(99, 102, 241, 0.15) 0%,
        transparent 60%);
    z-index: -1;
}

/* ===== HEADER ===== */
.course-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, var(--carbon-medium), var(--carbon-dark));
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--metal-dark);
    padding: 1rem 2rem;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header-container {
    max-width: 1800px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: linear-gradient(135deg, var(--carbon-light), var(--carbon-medium));
    border: 1px solid var(--metal-dark);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.back-btn:hover {
    background: linear-gradient(135deg, var(--metal-dark), var(--carbon-light));
    border-color: var(--accent-purple);
    color: var(--text-primary);
    transform: translateX(-3px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.course-info {
    flex: 1;
}

.course-title {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.course-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ===== PROGRESS RING ===== */
.progress-ring-container {
    position: relative;
    width: 60px;
    height: 60px;
}

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

.progress-ring-circle-bg {
    stroke: var(--metal-dark);
    stroke-width: 4;
    fill: none;
}

.progress-ring-circle {
    stroke: url(#progressGradient);
    stroke-width: 4;
    fill: none;
    stroke-linecap: round;
    stroke-dasharray: 163.36;
    stroke-dashoffset: 163.36;
    transition: stroke-dashoffset 0.5s var(--transition-smooth);
}

.progress-ring-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* ===== MAIN CONTAINER ===== */
.course-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 0;
    margin-top: 80px;
    min-height: calc(100vh - 80px);
}

/* ===== SIDEBAR ===== */
.course-sidebar {
    position: sticky;
    top: 80px;
    height: calc(100vh - 80px);
    background: linear-gradient(135deg, var(--carbon-medium), var(--carbon-dark));
    border-right: 1px solid var(--metal-dark);
    overflow-y: auto;
    z-index: 100;
    transition: transform var(--transition-speed) var(--transition-smooth);
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--metal-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.toggle-sidebar {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
}

.chapter-nav {
    padding: 1rem;
}

.chapter-item {
    padding: 1rem;
    margin-bottom: 0.5rem;
    background: var(--carbon-dark);
    border: 1px solid var(--metal-dark);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.chapter-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(153, 69, 255, 0.1), transparent);
    transition: left 0.5s var(--transition-smooth);
}

.chapter-item:hover {
    background: var(--carbon-light);
    border-color: var(--accent-purple);
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.chapter-item:hover::before {
    left: 100%;
}

.chapter-item.completed {
    border-color: var(--accent-green);
}

.chapter-item.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.2));
    border-color: var(--accent-purple);
}

/* ===== TILES CONTAINER ===== */
.tiles-container {
    padding: 3rem;
    max-width: 1600px;
    margin: 0 auto;
}

.tiles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 2rem;
}

/* ===== TILE CARD ===== */
.tile {
    position: relative;
    background: linear-gradient(135deg, var(--carbon-medium), var(--carbon-dark));
    border: 2px solid var(--metal-dark);
    border-radius: var(--border-radius);
    padding: 2rem;
    cursor: pointer;
    transition: all 0.5s var(--transition-smooth);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 340px;
    box-shadow: var(--shadow-md);
}

/* Scanline Effect */
.tile::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg,
        transparent,
        var(--accent-cyan),
        transparent);
    animation: scanline 3s linear infinite;
    opacity: 0;
    transition: opacity var(--transition-speed);
}

.tile:hover::before {
    opacity: 1;
}

@keyframes scanline {
    0% { top: 0; }
    100% { top: 100%; }
}

/* Hover Background Effect */
.tile-hover-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle,
        rgba(153, 69, 255, 0.15) 0%,
        transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.6s var(--transition-smooth);
    pointer-events: none;
    opacity: 0;
}

.tile:hover .tile-hover-effect {
    width: 500px;
    height: 500px;
    opacity: 1;
}

/* Hover State */
.tile:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--accent-purple);
    box-shadow: 
        var(--shadow-xl),
        0 0 40px rgba(153, 69, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    background: linear-gradient(135deg,
        var(--carbon-light),
        var(--carbon-medium));
}

/* Tile Number */
.tile-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-size: 4rem;
    font-weight: 900;
    font-family: 'Orbitron', monospace;
    color: rgba(153, 69, 255, 0.1);
    line-height: 1;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.tile:hover .tile-number {
    color: rgba(153, 69, 255, 0.2);
    transform: scale(1.1);
}

/* Tile Status */
.tile-status {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.status-icon {
    width: 24px;
    height: 24px;
    stroke: var(--metal-light);
    transition: all var(--transition-speed) var(--transition-smooth);
}

.tile.completed .status-icon {
    stroke: var(--accent-green);
    fill: var(--accent-green);
}

.tile.active .status-icon {
    stroke: var(--accent-cyan);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.1); }
}

/* Tile Content */
.tile-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    flex: 1;
}

/* Tile Icon */
.tile-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--carbon-dark), var(--carbon-medium));
    border: 2px solid var(--metal-dark);
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    transition: all var(--transition-speed) var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.tile-icon svg {
    width: 48px;
    height: 48px;
    stroke: var(--accent-purple);
    transition: all var(--transition-speed) var(--transition-smooth);
    position: relative;
    z-index: 1;
}

.tile:hover .tile-icon {
    transform: scale(1.1) rotate(5deg);
    border-color: var(--accent-purple);
    box-shadow: var(--shadow-glow);
}

.tile:hover .tile-icon svg {
    stroke: var(--accent-cyan);
    transform: scale(1.1);
}

/* Featured Tile Icon */
.tile-icon-featured {
    background: linear-gradient(135deg, rgba(153, 69, 255, 0.2), rgba(99, 102, 241, 0.2));
    border-color: var(--accent-purple);
}

.sparkle-effect {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 1.5rem;
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { opacity: 0.5; transform: scale(1) rotate(0deg); }
    50% { opacity: 1; transform: scale(1.2) rotate(180deg); }
}

/* Tile Title */
.tile-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    line-height: 1.3;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.tile:hover .tile-title {
    background: linear-gradient(135deg, var(--text-primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Tile Description */
.tile-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    flex: 1;
    transition: color var(--transition-speed) var(--transition-smooth);
}

.tile:hover .tile-description {
    color: var(--text-primary);
}

/* Tile Meta */
.tile-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-top: auto;
}

.tile-duration {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-dim);
    transition: color var(--transition-speed) var(--transition-smooth);
}

.tile:hover .tile-duration {
    color: var(--text-secondary);
}

.tile-duration svg {
    stroke: var(--accent-purple);
}

.tile-type {
    padding: 0.4rem 0.8rem;
    background: rgba(153, 69, 255, 0.1);
    border: 1px solid var(--accent-purple);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--accent-purple);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.tile:hover .tile-type {
    background: var(--accent-purple);
    color: var(--carbon-black);
    transform: scale(1.05);
}

.tile-type-premium {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-purple));
    color: var(--carbon-black);
    border: none;
}

/* Tile Badge */
.tile-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--accent-red), var(--accent-purple));
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 20px;
    box-shadow: var(--shadow-lg);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

/* Featured Tile */
.tile-featured {
    background: linear-gradient(135deg,
        rgba(153, 69, 255, 0.1),
        rgba(99, 102, 241, 0.1));
    border-color: var(--accent-purple);
}

.tile-featured:hover {
    background: linear-gradient(135deg,
        rgba(153, 69, 255, 0.2),
        rgba(99, 102, 241, 0.2));
    box-shadow: 
        var(--shadow-xl),
        0 0 60px rgba(153, 69, 255, 0.5);
}

/* ===== MODAL ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    animation: modalFadeIn 0.3s var(--transition-smooth);
}

.modal.active {
    display: block;
}

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

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
}

.modal-content {
    position: relative;
    max-width: 1200px;
    max-height: 90vh;
    margin: 5vh auto;
    background: linear-gradient(135deg, var(--carbon-medium), var(--carbon-dark));
    border: 2px solid var(--metal-dark);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
    animation: modalSlideIn 0.4s var(--transition-smooth);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 40px;
    height: 40px;
    background: var(--carbon-dark);
    border: 1px solid var(--metal-dark);
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed) var(--transition-smooth);
    z-index: 10;
}

.modal-close:hover {
    background: var(--accent-red);
    border-color: var(--accent-red);
    color: var(--text-primary);
    transform: rotate(90deg) scale(1.1);
}

.modal-body {
    padding: 3rem;
    max-height: calc(90vh - 120px);
    overflow-y: auto;
}

.modal-navigation {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.5rem 3rem;
    border-top: 1px solid var(--metal-dark);
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--carbon-light), var(--carbon-medium));
    border: 1px solid var(--metal-dark);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.nav-btn:hover {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    border-color: var(--accent-purple);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ===== CELEBRATION ===== */
.celebration {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.95);
    z-index: 3000;
    align-items: center;
    justify-content: center;
}

.celebration.active {
    display: flex;
}

.celebration-content {
    text-align: center;
    animation: celebrationBounce 0.6s var(--transition-smooth);
}

@keyframes celebrationBounce {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

.celebration-icon {
    font-size: 6rem;
    margin-bottom: 1rem;
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.celebration-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.celebration-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.celebration-btn {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-blue));
    border: none;
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.celebration-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1200px) {
    .tiles-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 992px) {
    .course-container {
        grid-template-columns: 1fr;
    }
    
    .course-sidebar {
        position: fixed;
        transform: translateX(-100%);
        width: 280px;
        height: 100vh;
        top: 0;
        z-index: 1500;
    }
    
    .course-sidebar.open {
        transform: translateX(0);
    }
    
    .toggle-sidebar {
        display: block;
    }
    
    .tiles-container {
        padding: 2rem 1.5rem;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0.5rem 1rem;
    }
    
    .course-title {
        font-size: 1rem;
    }
    
    .course-meta {
        font-size: 0.75rem;
    }
    
    .tiles-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .tile {
        min-height: 300px;
    }
    
    .modal-content {
        margin: 2vh 1rem;
        max-height: 96vh;
    }
    
    .modal-body {
        padding: 2rem 1.5rem;
    }
    
    .modal-navigation {
        flex-direction: column;
        padding: 1rem 1.5rem;
    }
    
    .celebration-icon {
        font-size: 4rem;
    }
    
    .celebration-content h2 {
        font-size: 2rem;
    }
}

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--carbon-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--metal-dark);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-purple);
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles */
button:focus,
.tile:focus {
    outline: 2px solid var(--accent-purple);
    outline-offset: 4px;
}