/* index.css - Édition Premium "Obsidienne & Or" */
@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;700&family=Playfair+Display:wght@400;700&display=swap');
  
:root {
    /* Palette Sombre Premium (Défaut) */
    --bg-base: #0a0806;
    --bg-gradient: radial-gradient(circle at top right, #1f1710 0%, #0a0806 60%);
    --text-primary: #f8f1e3;
    --text-secondary: #c4b59d;
    --accent: #d4af37;
    --accent-glow: rgba(212, 175, 55, 0.6);
    --glass-bg: rgba(20, 16, 12, 0.4);
    --glass-border: rgba(212, 175, 55, 0.15);
    --nav-glass: rgba(10, 8, 6, 0.75);
    --footer-bg: #050403;
    
    /* Variables dynamiques pour la zone Projets */
    --section-overlay: rgba(10, 8, 6, 0.8);
    --card-front-shade: #1a1612;
    --card-back-shade: #0f0d0b;
    
    /* Layout */
    --transition-smooth: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-snappy: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

body.light {
    /* Palette Claire Luxueuse (Marbre & Or) */
    --bg-base: #faf8f5;
    --bg-gradient: radial-gradient(circle at top right, #ffffff 0%, #f0ebe1 100%);
    --text-primary: #2c241b;
    --text-secondary: #5a4f43;
    --accent: #b8860b;
    --accent-glow: rgba(184, 134, 11, 0.4);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(184, 134, 11, 0.2);
    --nav-glass: rgba(250, 248, 245, 0.85);
    --footer-bg: #f0ebe1;
    
    /* Variables dynamiques adaptées au Mode Clair */
    --section-overlay: rgba(240, 235, 225, 0.8);
    --card-front-shade: rgba(255, 255, 255, 0.9);
    --card-back-shade: rgba(250, 248, 245, 0.95);
}

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

body {
    font-family: 'Playfair Display', serif;
    background: var(--bg-base);
    background-image: var(--bg-gradient);
    color: var(--text-primary);
    overflow-x: hidden; /* Empêche le scroll horizontal global */
    line-height: 1.7;
    transition: background 0.8s ease, color 0.8s ease;
    scroll-behavior: smooth;
    max-width: 100vw;
}

::selection {
    background: var(--accent);
    color: #000;
}

/* Scrollbar Stylisée */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { 
    background: var(--accent); 
    border-radius: 10px;
    border: 2px solid var(--bg-base);
}
::-webkit-scrollbar-thumb:hover { background: #ffd700; }

/* Typographie H1, H2, H3 */
h1, h2, h3, .nav-logo, .theme-toggle, .project-btn, .cta-button, .card-title, .tech-name {
    font-family: 'Cinzel', serif;
    font-weight: 600;
    letter-spacing: 1px;
}

/* =========================================
   NAVIGATION & HEADER
   ========================================= */

header {
    text-align: center;
    padding: 5rem 1rem 2.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--accent);
    position: relative;
    z-index: 1;
}

header::before {
    content: '';
    position: absolute;
    top: 0.8rem;
    left: 50%;
    transform: translateX(-50%);
    width: 65px;
    height: 65px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cpolygon points='50,5 95,50 50,95 5,50' fill='none' stroke='%23d4af37' stroke-width='3'/%3E%3Cpolygon points='50,15 85,50 50,85 15,50' fill='%23d4af37'/%3E%3C/svg%3E") no-repeat center center;
    background-size: contain;
    z-index: 0;
    filter: drop-shadow(0 0 12px var(--accent-glow));
    pointer-events: none;
}

header h1 {
    position: relative;
    z-index: 2;
    font-size: clamp(1.4rem, 3vw, 2.2rem); 
    font-family: 'Cinzel', serif;
    font-weight: 700;
    letter-spacing: 6px;
    text-transform: uppercase;
    
    background: linear-gradient(to right, #b8860b, #f8f1e3, #b8860b);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    
    transition: var(--transition-smooth);
    display: inline-block;
}

header h1:hover {
    letter-spacing: 10px;
    filter: brightness(1.2) drop-shadow(0 0 10px var(--accent-glow));
}

#progress-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent-glow);
    z-index: 1001;
    transition: width 0.2s ease;
}

nav {
    position: sticky;
    top: 0;
    background: var(--nav-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    padding: 0.8rem 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
    gap: 2rem;
}

.nav-logo {
    font-size: 1.8rem;
    color: var(--accent);
    text-decoration: none;
    text-transform: uppercase;
    background: linear-gradient(to right, #d4af37, #fff8e7, #d4af37);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shine 6s linear infinite;
    background-size: 200% auto;
    flex-shrink: 0;
    transition: font-size 0.3s ease;
}

.nav-menu {
    display: flex;
    gap: 2.5rem; 
    list-style: none;
    align-items: center;
    margin: 0 auto;
}

.nav-link {
    color: var(--text-primary);
    min-width: 100px;
    text-align: center;
    text-decoration: none;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    position: relative;
    padding: 0.5rem 0;
    transition: color 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
    box-shadow: 0 0 8px var(--accent-glow);
}

.nav-link:hover { color: var(--accent); }
.nav-link:hover::after { width: 100%; }

header#hero { display: none; } 

/* =========================================
   HERO SECTION
   ========================================= */
.hero {
    min-height: 90vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 150vw;
    height: 150vw;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 40%);
    opacity: 0.1;
    animation: pulseGlow 8s ease-in-out infinite alternate;
    z-index: -1;
}

.rotating-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3), inset 0 0 0 1px rgba(255, 255, 255, 0.05);
    animation: float 6s ease-in-out infinite;
    transform-style: preserve-3d;
}

#profileImg {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid transparent;
    background: linear-gradient(var(--bg-base), var(--bg-base)) padding-box, 
                linear-gradient(45deg, var(--accent), transparent, var(--accent)) border-box;
    margin-bottom: 1.5rem;
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
    transition: transform 0.5s ease;
}

.rotating-card:hover #profileImg { transform: scale(1.05) translateZ(20px); }

.card-title {
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.rotating-card p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-style: italic;
}

/* =========================================
   CALL TO ACTION
   ========================================= */
.cta-section {
    padding: 6rem 2rem;
    text-align: center;
    background: linear-gradient(to right, transparent, var(--glass-bg), transparent);
    border-top: 1px solid var(--glass-border);
    border-bottom: 1px solid var(--glass-border);
}

.cta-text {
    font-family: 'Cinzel', serif;
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--text-primary);
    margin-bottom: 1rem;
    max-width: 900px;
    margin-inline: auto;
}

.cta-subtext {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent) 0%, #b8860b 100%);
    color: #000;
    padding: 1.2rem 3rem;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.1rem;
    text-transform: uppercase;
    transition: var(--transition-smooth);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2), 0 0 15px var(--accent-glow);
    position: relative;
    overflow: hidden;
}

.cta-button::after {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.4), transparent);
    transform: skewX(-25deg);
    transition: 0.7s;
}

.cta-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 25px rgba(0,0,0,0.3), 0 0 30px var(--accent-glow);
}
.cta-button:hover::after { left: 200%; }

/* =========================================
   TECHNOLOGIES
   ========================================= */
.technologies {
    padding: 8rem 2rem;
    text-align: center;
    position: relative;
}

.technologies h2 {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.technologies h2::after {
    content: '.';
    color: var(--accent);
}

.tech-subtitle {
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 4rem auto;
    font-size: 1.1rem;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tech-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 2.5rem 1.5rem;
    border-radius: 15px;
    transition: var(--transition-snappy);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.tech-item::before {
    content: '';
    position: absolute;
    top: 0; left: 0; width: 100%; height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    transform: scaleX(0);
    transition: transform 0.5s ease;
}

.tech-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    border-color: rgba(212, 175, 55, 0.4);
    background: rgba(212, 175, 55, 0.05);
}

.tech-item:hover::before { transform: scaleX(1); }

.tech-name {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.tech-category {
    color: var(--accent);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* =========================================
   PROJETS (CARTES 3D PREMIUM)
   ========================================= */
.projects {
    padding: 8rem 2rem;
    /* Utilisation de la variable dynamique pour le mode sombre/clair */
    background: linear-gradient(to bottom, transparent, var(--section-overlay));
    transition: background 0.8s ease;
}

.projects h2 {
    text-align: center;
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    margin-bottom: 4rem;
}

.projects h2::after { content: '.'; color: var(--accent); }

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 3rem;
    max-width: 1300px;
    margin: 0 auto;
}

.project-card {
    height: 380px;
    perspective: 1500px;
}

.project-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform-style: preserve-3d;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
}

.project-card:hover .project-card-inner { transform: rotateY(180deg); }

.project-front, .project-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    transition: background 0.8s ease;
}

.project-front {
    /* Utilisation de la variable dynamique */
    background: linear-gradient(145deg, var(--glass-bg), var(--card-front-shade));
}

.project-back {
    transform: rotateY(180deg);
    /* Utilisation de la variable dynamique */
    background-color: var(--card-back-shade); /* Fond opaque obligatoire */
    transform: rotateY(180deg);
}

.project-card h3 {
    font-size: 1.6rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.project-btn {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--accent);
    padding: 0.8rem 1.8rem;
    border-radius: 30px;
    cursor: pointer;
    text-transform: uppercase;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
}

.project-btn:hover {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 15px var(--accent-glow);
}

.project-back .project-btn { background: var(--accent); color: #000; }
.project-back .project-btn:hover { background: #fff; border-color: #fff; box-shadow: 0 0 20px rgba(255,255,255,0.5); }
/* =========================================
    FAQ
    ======================================== */

.faq {
    padding: 6rem 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.faq h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.faq-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 15px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.faq-item:hover {
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow);
}

.faq-question {
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Cinzel', serif;
}

.faq-icon {
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 1.5rem;
    color: var(--text-secondary);
    transition: all 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 1rem 1.5rem 1.5rem;
}

.faq-item.active .faq-answer::before {
    content: '';
    display: block;
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--accent), transparent);
    margin-bottom: 1.2rem;
    opacity: 0.6;
}

/* =========================================
   FOOTER
   ========================================= */
.footer {
    background: var(--footer-bg);
    padding: 5rem 2rem 2rem;
    border-top: 1px solid var(--glass-border);
    transition: background 0.8s ease;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-brand {
    font-size: 2.2rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.footer-brand::after { content: '.'; color: var(--accent); }

.footer-brand-subtitle { color: var(--text-secondary); font-style: italic; }

.footer-section h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-nav ul { list-style: none; }
.footer-nav li { margin-bottom: 1rem; }
.footer-nav a, .footer-contact a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}
.footer-nav a:hover, .footer-contact a:hover { color: var(--accent); }

.footer-social { display: flex; gap: 1rem; }
.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px; height: 45px;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: var(--transition-snappy);
}
.footer-social a:hover {
    background: var(--accent);
    color: #000;
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px var(--accent-glow);
}
.social-icon { width: 20px; height: 20px; fill: currentColor; }

.footer-copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(184, 134, 11, 0.2);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* =========================================
   ANIMATIONS
   ========================================= */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes shine {
    to { background-position: 200% center; }
}

@keyframes pulseGlow {
    0% { transform: scale(1); opacity: 0.05; }
    100% { transform: scale(1.1); opacity: 0.15; }
}

/* =========================================
   1. SECTION DROITE (Conteneur Parent)
   ========================================= */
.nav-right-controls {
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

/* =========================================
   2. BOUTON THEME-TOGGLE (Style Royal)
   ========================================= */
.theme-toggle {
    background: linear-gradient(145deg, var(--accent), var(--accent-glow));
    color: #000;
    border: none;
    font-family: 'Cinzel', serif;
    font-size: clamp(.8rem, 2vw, .9rem);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    padding: .7rem 1.2rem;
    border-radius: 25px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    font-weight: 700;
    box-shadow: 0 3px 12px rgba(212,175,55,.4);
    animation: themeToggleFloat 3s ease-in-out infinite;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,.3), transparent);
    transition: left .6s ease;
}

.theme-toggle:hover::before { left: 100%; }

.theme-toggle:hover {
    background: linear-gradient(145deg, var(--accent-glow), var(--accent));
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(212,175,55,.5), 0 0 20px var(--accent-glow);
}

@keyframes themeToggleFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

/* =========================================
   3. MENU HAMBURGER (Caché sur Desktop)
   ========================================= */
.nav-toggle {
    display: none; 
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    width: 35px;
    transition: transform 0.3s ease;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
    transition: all 0.3s ease;
    box-shadow: 0 0 5px var(--accent-glow);
}

.nav-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* =========================================
   4. RESPONSIVE (MOBILE)
   ========================================= */
@media (max-width: 769px) {
    .nav-container {
        padding: 0 1rem;           /* un peu plus d'espace à gauche/droite */
        gap: 0.8rem;               /* équilibre entre logo et contrôles */
    }

    .nav-logo {
        font-size: 1.05rem;        /* légèrement plus petit que 1.1rem pour gagner de la place */
        white-space: nowrap;       /* évite que le texte se coupe */
    }

    .nav-right-controls {
        gap: 0.6rem;
        background: linear-gradient(145deg, rgba(212,175,55,.12), rgba(212,175,55,.06));
        padding: 0.35rem 0.7rem;
        border-radius: 30px;
        border: 1px solid rgba(212,175,55,.35);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        box-shadow: 0 4px 15px rgba(0,0,0,0.25);
        margin-right: 0.3rem;
    }

    .theme-toggle {
        padding: 0.45rem 0.85rem;   /* plus compact et agréable au toucher */
        font-size: 0.73rem;
        letter-spacing: 1px;
    }

    .nav-toggle {
        display: flex;
        width: 38px;                /* un peu plus grand = plus facile à cliquer */
        height: 38px;
        justify-content: center;
        align-items: center;
    }

    /* Menu mobile amélioré */
    .nav-menu {
        display: none;
        flex-direction: column;
        gap: 1.2rem;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--nav-glass);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        padding: 2rem 1.5rem;
        border-bottom: 3px solid var(--accent);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
        opacity: 0;
        transform: translateY(-15px);
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        text-align: center;
        z-index: 999;
    }

    body.mobile-menu-open .nav-menu {
        display: flex;
        opacity: 1;
        transform: translateY(0);
    }

    /* Liens du menu un peu plus grands sur mobile */
    .nav-link {
        font-size: 1.05rem;
        padding: 0.6rem 0;
    }

    /* TECHNOLOGIES → 2 blocs */
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    /* PROJETS → 2 blocs */
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }

    /* Ajustement cartes projet */
    .project-card {
        height: auto;
        height: 300px; /* un peu plus petit pour mobile */
    }

    /* Texte plus compact */
    .project-card h3 {
        font-size: 0.90rem;
    }

    .project-card p {
        word-break: break-word;
        line-height: 1.5;
        font-size: 0.75rem;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Si dernier élément seul → centré */
    .project-card:last-child:nth-child(odd) {
        grid-column: 1 / -1; /* prend toute la largeur */
        justify-self: center;
        max-width: 300px;
        width: 100%;
    }

    .project-btn {
        white-space: nowrap;
    }
}