/* Variables CSS - Gamer RGB Theme */
:root {
    --primary-color: #ff00ff;
    --secondary-color: #00ffff;
    --accent-color: #ff0080;
    --dark-bg: rgba(10, 10, 15, 0.85);
    --darker-bg: rgba(5, 5, 10, 0.95);
    --light-bg: rgba(30, 30, 40, 0.8);
    --text-dark: #f0f0f0;
    --text-light: #ffffff;
    --card-bg: rgba(20, 20, 30, 0.7);
    --card-dark-bg: rgba(15, 15, 25, 0.85);
    --success-color: #00ff00;
    --warning-color: #ffff00;
    --danger-color: #ff0000;
    --shadow: 0 8px 32px 0 rgba(255, 0, 255, 0.2);
    --shadow-lg: 0 8px 32px 0 rgba(0, 255, 255, 0.3);
    --glow-pink: 0 0 20px rgba(255, 0, 255, 0.5);
    --glow-cyan: 0 0 20px rgba(0, 255, 255, 0.5);
}

/* Reset et Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-light);
    overflow: hidden;
    background: #0a0a0f;
    margin: 0;
    padding: 0;
    width: 100vw;
    height: 100vh;
}

/* Canvas 3D plein écran */
#scene3d {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: block;
    z-index: 1;
}

/* Loading Screen */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #0f0f1e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

.loading-content {
    text-align: center;
    color: #00ffff;
}

.loading-content h2 {
    font-size: 28px;
    margin-bottom: 30px;
    font-family: 'Courier New', monospace;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.5);
}

.loading-bar {
    width: 300px;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    overflow: hidden;
    position: relative;
}

.loading-progress {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, #ff00ff, #00ffff, #ff0080);
    background-size: 200% 100%;
    animation: loading-animation 1.5s ease-in-out infinite;
    border-radius: 3px;
}

@keyframes loading-animation {
    0% {
        background-position: 100% 0;
    }
    100% {
        background-position: -100% 0;
    }
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--accent-color);
}

.timer-display {
    background: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1.2rem;
    font-family: 'Courier New', monospace;
    box-shadow: var(--glow-pink);
    border: 1px solid rgba(255, 0, 255, 0.3);
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: var(--glow-pink); }
    50% { box-shadow: 0 0 30px rgba(255, 0, 255, 0.8); }
}

/* Instructions 3D */
.instructions-3d {
    position: fixed;
    top: 80px;
    right: 20px;
    background: var(--darker-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 0, 255, 0.3);
    border-radius: 12px;
    padding: 15px 20px;
    z-index: 999;
    box-shadow: var(--glow-pink);
    animation: slide-in-right 0.5s ease;
}

@keyframes slide-in-right {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.instructions-title {
    font-family: 'Courier New', monospace;
    font-size: 14px;
    font-weight: bold;
    color: var(--primary-color);
    text-shadow: var(--glow-pink);
    margin-bottom: 10px;
    text-align: center;
}

.instructions-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.instruction-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--text-light);
}

.instruction-icon {
    font-size: 16px;
}

.instruction-text {
    font-family: 'Courier New', monospace;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    color: var(--text-light);
    text-align: center;
    padding: 2rem;
    margin-top: 60px;
    position: relative;
    z-index: 1;
}

.hero-hint {
    margin-top: 2rem;
    font-size: 1.2rem;
    opacity: 0.8;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.hero-duration {
    font-size: 1.2rem;
    opacity: 0.8;
    margin-bottom: 2rem;
}

.cta-button {
    background: var(--text-light);
    color: var(--primary-color);
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    box-shadow: var(--shadow-lg);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Sections - Glassmorphism */
.section {
    padding: 5rem 2rem;
    position: relative;
    z-index: 1;
}

.section-light {
    background: var(--light-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(0, 255, 255, 0.1);
    border-bottom: 1px solid rgba(0, 255, 255, 0.1);
}

.section-dark {
    background: var(--dark-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-light);
    border-top: 1px solid rgba(255, 0, 255, 0.1);
    border-bottom: 1px solid rgba(255, 0, 255, 0.1);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-number {
    font-size: 4rem;
    font-weight: bold;
    color: var(--accent-color);
    opacity: 0.3;
}

.section-title {
    font-size: 2.5rem;
    flex: 1;
    margin: 0 2rem;
}

.section-dark .section-title {
    color: var(--text-light);
}

.section-time {
    background: var(--warning-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-weight: bold;
    font-size: 1.1rem;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

/* Cards - Glassmorphism RGB */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s, border 0.3s;
}

.section-dark .card {
    background: var(--card-dark-bg);
    color: var(--text-light);
    border: 1px solid rgba(255, 0, 255, 0.2);
}

.section-light .card {
    border: 1px solid rgba(0, 255, 255, 0.2);
}

.card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: var(--shadow-lg), var(--glow-pink);
    border-color: rgba(255, 0, 255, 0.5);
}

.section-light .card:hover {
    box-shadow: var(--shadow-lg), var(--glow-cyan);
    border-color: rgba(0, 255, 255, 0.5);
}

.card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    text-shadow: var(--glow-pink);
}

.section-light .card h3 {
    color: var(--secondary-color);
    text-shadow: var(--glow-cyan);
}

.section-dark .card h3 {
    color: var(--accent-color);
}

.card ul {
    list-style-position: inside;
    margin-left: 1rem;
}

.card ul ul {
    margin-left: 2rem;
    margin-top: 0.5rem;
}

.card li {
    margin-bottom: 0.5rem;
}

.card-highlight {
    border-left: 4px solid var(--accent-color);
    background: linear-gradient(135deg, rgba(255, 0, 255, 0.15) 0%, rgba(255, 0, 128, 0.1) 100%);
    position: relative;
    overflow: hidden;
}

.card-highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 0, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.section-dark .card-highlight {
    background: linear-gradient(135deg, rgba(255, 0, 255, 0.2) 0%, rgba(0, 255, 255, 0.1) 100%);
}

/* Skills - RGB animated */
.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 10px rgba(255, 0, 255, 0.3);
    transition: all 0.3s;
    animation: rgb-pulse 3s infinite alternate;
}

@keyframes rgb-pulse {
    0% {
        box-shadow: 0 0 10px rgba(255, 0, 255, 0.5);
        border-color: rgba(255, 0, 255, 0.5);
    }
    50% {
        box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
        border-color: rgba(0, 255, 255, 0.5);
    }
    100% {
        box-shadow: 0 0 10px rgba(255, 0, 128, 0.5);
        border-color: rgba(255, 0, 128, 0.5);
    }
}

.skill-tag:hover {
    transform: scale(1.1);
    box-shadow: 0 0 25px rgba(255, 0, 255, 0.8);
}

/* Project Intro */
.project-intro {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary-color);
}

.section-dark .project-intro {
    background: var(--card-dark-bg);
}

.project-intro h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-dark .project-intro h3 {
    color: var(--accent-color);
}

.highlight {
    background: rgba(37, 99, 235, 0.1);
    padding: 1rem;
    border-radius: 8px;
    font-weight: 500;
    font-size: 1.1rem;
    margin-top: 1rem;
}

/* Difficulty Items */
.difficulty-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.section-dark .difficulty-item {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.difficulty-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.difficulty-item h4 {
    color: var(--warning-color);
    margin-bottom: 0.5rem;
}

.difficulty-item p {
    margin: 0.25rem 0;
}

/* Code Structure */
.code-structure {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.code-structure code {
    background: var(--darker-bg);
    color: var(--success-color);
    padding: 0.75rem;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* Veille Section */
.veille-intro {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.section-dark .veille-intro {
    background: var(--card-dark-bg);
}

.veille-intro h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-dark .veille-intro h3 {
    color: var(--accent-color);
}

.highlight-large {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--accent-color);
    margin: 1rem 0;
    text-align: center;
}

.veille-axis {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.section-dark .veille-axis {
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

.veille-axis:last-child {
    border-bottom: none;
}

.veille-axis h4 {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.application-item {
    margin-bottom: 1.5rem;
}

.application-item h4 {
    color: var(--success-color);
    margin-bottom: 0.5rem;
}

/* Button Link */
.btn-link {
    display: inline-block;
    margin-top: 1rem;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

.btn-link:hover {
    color: var(--accent-color);
}

/* Conclusion */
.conclusion {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-light);
    padding: 5rem 2rem;
}

.conclusion h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
}

.conclusion-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.conclusion .card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--text-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.conclusion .card h3 {
    color: var(--text-light);
    border-bottom: 2px solid rgba(255, 255, 255, 0.3);
    padding-bottom: 0.5rem;
}

.questions-section {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.questions-section h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.questions-section p {
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: var(--darker-bg);
    color: var(--text-light);
    text-align: center;
    padding: 2rem;
}

.footer a {
    color: var(--accent-color);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Timer Control */
.timer-control {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    gap: 1rem;
    z-index: 1000;
}

.timer-btn {
    background: var(--success-color);
    color: white;
    border: none;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: bold;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s, background 0.3s;
}

.timer-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-color);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
        margin: 0;
    }

    .section-number {
        font-size: 3rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: 0.5rem;
    }

    .content-grid {
        grid-template-columns: 1fr;
    }

    .timer-control {
        flex-direction: column;
        bottom: 1rem;
        right: 1rem;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Print styles */
@media print {
    .navbar,
    .timer-control,
    .cta-button {
        display: none;
    }

    .section {
        page-break-inside: avoid;
    }
}

/* Scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Selection */
::selection {
    background: var(--accent-color);
    color: white;
}

/* Pulse animation for important elements */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.7);
    }
    50% {
        transform: scale(1.02);
        box-shadow: 0 0 0 10px rgba(37, 99, 235, 0);
    }
}

.timer-display.warning {
    animation: pulse 2s infinite;
}

/* Active nav link */
.nav-link.active {
    color: var(--accent-color);
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 4px;
}

/* Gradient text */
.text-gradient {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Enhanced card hover with emoji support */
.card h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Progress bar for presentation */
.presentation-progress {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(37, 99, 235, 0.2);
    z-index: 999;
}

.presentation-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--success-color) 0%, var(--primary-color) 50%, var(--danger-color) 100%);
    transition: width 0.3s ease;
    width: 0%;
}