*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    color: #f0f0f0;
    background-color: #050505;
    font-family: 'Montserrat', sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-top: 130px; 
    overflow-x: hidden;
    background-image: radial-gradient(circle at 50% 0%, #1a1500 0%, #050505 60%);
    background-attachment: fixed; /* CORRECTION : Le fond reste fixe pendant le scroll */
    /* CORRECTION : On a retiré le "perspective" ici qui cassait les éléments "fixed" */
}

::-webkit-scrollbar { width: 11px; }
::-webkit-scrollbar-track { background: #050505; }
::-webkit-scrollbar-thumb { background: #8a6d1c; border-radius: 5px; border: 3px solid #050505; }
::-webkit-scrollbar-thumb:hover { background: #d4af37; }

/* ========================================= */
/* BARRE DE NAVIGATION                       */
/* ========================================= */
.navbar {
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 90px;
    background: rgba(5, 5, 5, 0.98); 
    border-bottom: 1px solid rgba(212, 175, 55, 0.15);
    display: flex; 
    align-items: center; 
    justify-content: space-between;
    padding: 0 25px; 
    z-index: 5000; 
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
}

.nav-brand { 
    display: flex; 
    align-items: center; 
    z-index: 5001; 
}

.nav-logo-img { 
    height: 48px; 
    width: auto; 
    filter: drop-shadow(0 0 5px rgba(212, 175, 55, 0.3)); 
    transition: transform 0.3s ease; 
}

.navbar:hover .nav-logo-img { 
    transform: scale(1.05); 
}

.nav-toggle { display: none; }

.nav-burger { 
    display: none; 
    flex-direction: column; 
    justify-content: space-between; 
    width: 30px; 
    height: 21px; 
    cursor: pointer; 
    z-index: 5002; 
}

.nav-burger span { 
    display: block; 
    height: 3px; 
    width: 100%; 
    background-color: #d4af37; 
    border-radius: 3px; 
    transition: all 0.3s ease; 
}

.nav-links { 
    display: flex; 
    flex: 1; 
    justify-content: center; 
    align-items: center; 
    gap: 2vw; 
    margin: 0 10px; 
}

.nav-links a {
    text-decoration: none; 
    color: #a0a0a0; 
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(0.7rem, 1vw + 0.3rem, 0.85rem); 
    font-weight: 500; 
    text-transform: uppercase;
    letter-spacing: 1px; 
    padding: 5px 0; 
    position: relative; 
    transition: all 0.3s ease; 
    white-space: nowrap;
}

.nav-links a::after {
    content: ''; 
    position: absolute; 
    bottom: -2px; 
    left: 0; 
    width: 0; 
    height: 2px;
    background: #d4af37; 
    transition: width 0.3s cubic-bezier(0.25, 1, 0.5, 1); 
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.8);
}

.nav-links a:hover, 
.nav-links a.active { 
    color: #ffffff; 
    text-shadow: 0 0 15px rgba(212, 175, 55, 0.6); 
}

.nav-links a:hover::after, 
.nav-links a.active::after { 
    width: 100%; 
}

.btn-cv-desktop {
    display: inline-flex; 
    align-items: center; 
    justify-content: center; 
    height: 37px; 
    padding: 0 25px;
    min-width: 125px; 
    gap: 8px; 
    margin: 0 0 0 auto; 
    background: linear-gradient(135deg, #d4af37 0%, #aa8c2c 100%);
    color: #000000 !important; 
    font-family: 'Montserrat', sans-serif; 
    font-size: 0.75rem; 
    font-weight: 600;
    text-transform: uppercase; 
    letter-spacing: 1px; 
    text-decoration: none; 
    border-radius: 4px;
    border: 1px solid #f9e5a0; 
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.4); 
    position: relative; 
    overflow: hidden; 
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.btn-cv-desktop:hover { 
    transform: translateY(-2px); 
    box-shadow: 0 0 25px rgba(212, 175, 55, 0.4); 
    background: linear-gradient(135deg, #fff7cc 0%, #d4af37 100%); 
}

.btn-cv-desktop::before { 
    content: ''; 
    position: absolute; 
    top: 0; 
    left: -100%; 
    width: 100%; 
    height: 100%; 
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent); 
    transition: 0.6s; 
}

.btn-cv-desktop:hover::before { 
    left: 100%; 
}

.btn-cv-mobile { 
    display: none; 
}

/* ========================================= */
/* EN-TÊTE DE LA PAGE                        */
/* ========================================= */
.main-container {
    max-width: 1190px; 
    width: 89%; 
    margin: 0 auto 95px auto;
    position: relative; 
    z-index: 10;
}

.page-header { 
    text-align: center; 
    margin-bottom: 68px; 
}

.page-title {
    font-family: 'Playfair Display', serif; 
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-style: italic; 
    color: #f0f0f0; 
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    animation: fadeDown 1s ease-out; 
    line-height: 1.1; 
    margin: 0 0 10px 0;
    background: linear-gradient(to right, #ffffff 20%, #d4af37 50%, #ffffff 80%);
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent;
}

.subtitle-instruction {
    font-family: 'Montserrat', sans-serif; 
    color: #d4af37; 
    font-size: 1rem; 
    font-weight: 300; 
    text-transform: uppercase;
    letter-spacing: 4px; 
    padding-bottom: 15px; 
    border-bottom: 1px solid #d4af37; 
    display: inline-block; 
    animation: fadeUp 1s ease-out 0.3s backwards;
}

/* ========================================= */
/* CARTES PROJETS (3D PARALLAX)              */
/* ========================================= */
.featured-project-section {
    margin-bottom: 78px; 
    animation: fadeUp 1s ease-out 0.3s backwards; 
    perspective: 2000px; /* La 3D reste active sur les sections */
}

.featured-card {
    background: linear-gradient(145deg, #111 0%, #050505 100%); 
    border-radius: 15px; 
    display: grid; 
    grid-template-columns: 1.2fr 0.8fr;
    position: relative; 
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8); 
    border: 1px solid rgba(212, 175, 55, 0.28);
    overflow: hidden; 
    min-height: 450px; 
    transform-style: preserve-3d; 
    transition: transform 0.1s ease-out, box-shadow 0.1s ease-out;
}

.reverse-layout { 
    grid-template-columns: 0.78fr 1.22fr; 
}

/* Éléments internes 3D */
.featured-content {
    padding: 58px; 
    display: flex; 
    flex-direction: column; 
    justify-content: center; 
    z-index: 2; 
    transform-style: preserve-3d;
    transform: translateZ(30px); 
}

.featured-image {
    background: radial-gradient(circle at 48% 48%, #1a1400 0%, #050505 100%); 
    display: flex; 
    position: relative; 
    overflow: hidden; 
    justify-content: center; 
    align-items: center;
    border-left: 1px solid rgba(255, 255, 255, 0.05); 
    transform-style: preserve-3d;
}

.reverse-layout .featured-image {
    border-left: none; 
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    background: radial-gradient(circle at 50% 50%, #0f0f0f 0%, #000000 100%);
}

.project-tag {
    color: #d4af37; 
    font-size: 0.8rem; 
    text-transform: uppercase; 
    letter-spacing: 2px; 
    font-weight: 700; 
    margin-bottom: 20px; 
    display: inline-flex; 
    align-items: center;
}

.project-tag::before { 
    content: ''; 
    width: 30px; 
    height: 1px; 
    background: #d4af37; 
    margin-right: 15px; 
}

.featured-title { 
    font-family: 'Playfair Display', serif; 
    font-size: clamp(2rem, 4vw, 3rem); 
    color: #f0f0f0; 
    margin: 0 0 25px 0; 
    line-height: 1.1; 
}

.dot { color: #d4af37; }

.featured-desc { 
    color: #a0a0a0; 
    font-size: 1.05rem; 
    line-height: 1.8; 
    margin-bottom: 30px; 
    max-width: 600px; 
}

.tech-tags { 
    display: flex; 
    flex-wrap: wrap; 
    gap: 10px; 
    margin-bottom: 40px; 
}

.tech-tags span { 
    font-size: 0.75rem; 
    padding: 5px 13px; 
    border-radius: 40px; 
    border: 1px solid rgba(212, 175, 55, 0.3); 
    color: #d4af37; 
    background: rgba(212, 175, 55, 0.05); 
}

.btn-gold {
    align-self: flex-start; 
    padding: 15px 40px; 
    background: linear-gradient(135deg, #d4af37 0%, #aa8c2c 100%);
    color: #000000; 
    text-decoration: none; 
    font-weight: 700; 
    text-transform: uppercase; 
    letter-spacing: 1px;
    font-size: 0.9rem; 
    border-radius: 4px; 
    border: none; 
    position: relative; 
    overflow: hidden;
    transform: translateZ(50px); 
    transition: all 0.3s ease; 
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5); 
    cursor: pointer;
    text-align: center;
}

.btn-gold:hover { 
    background: #fff; 
    box-shadow: 0 10px 30px rgba(212, 175, 55, 0.6); 
}

.btn-outline {
    background: transparent;
    border: 1px solid #d4af37;
    color: #d4af37;
    box-shadow: none;
}

.btn-outline:hover {
    background: #d4af37;
    color: #000;
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.4);
}

.abstract-visual {
    font-size: 7rem; 
    position: relative; 
    z-index: 2; 
    text-shadow: 0 0 40px #d4af37;
    transform: translateZ(80px); 
    animation: float 4s ease-in-out infinite;
}

/* ========================================= */
/* ANIMATIONS KEYFRAMES                      */
/* ========================================= */
@keyframes float { 
    0%, 100% { transform: translateZ(80px) translateY(0); } 
    50% { transform: translateZ(80px) translateY(-18px); } 
}
@keyframes fadeDown { 
    from { opacity: 0; transform: translateY(-28px); } 
    to { opacity: 1; transform: translateY(0); } 
}
@keyframes fadeUp { 
    from { opacity: 0; transform: translateY(30px); } 
    to { opacity: 1; transform: translateY(0); } 
}

.projects-separator { 
    width: 60%; 
    height: 1px; 
    background: linear-gradient(90deg, transparent, rgba(212, 175, 55, 0.5), transparent); 
    margin: 20px auto 80px auto; 
}

/* ========================================= */
/* JS PARTICULES ET ONDES                    */
/* ========================================= */
#gold-particles { 
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100vw; 
    height: 100vh; 
    z-index: -1; 
    pointer-events: none; 
}

.cursor-glow {
    position: fixed; 
    width: 400px; 
    height: 400px; 
    background: radial-gradient(circle, rgba(212, 175, 55, 0.12) 0%, rgba(212, 175, 55, 0) 70%);
    border-radius: 50%; 
    pointer-events: none; 
    transform: translate(-50%, -50%); 
    z-index: 0; 
    mix-blend-mode: screen; 
    transition: opacity 0.3s ease;
}

.ripple { 
    position: absolute; 
    border-radius: 50%; 
    transform: scale(0); 
    animation: ripple-effect 0.6s linear; 
    background-color: rgba(255, 255, 255, 0.4); 
    pointer-events: none; 
}

@keyframes ripple-effect { 
    to { transform: scale(4); opacity: 0; } 
}

/* ========================================= */
/* RESPONSIVE MOBILE                         */
/* ========================================= */
@media (max-width: 900px) {
    body { padding-top: 0 !important; }
    
    .navbar { 
        height: 70px; 
        padding: 0 20px; 
        flex-direction: row; 
        justify-content: space-between; 
        background: #050505; 
    }
    
    .nav-logo-img { height: 35px; margin: 0; }
    .btn-cv-desktop { display: none !important; }
    .nav-burger { display: flex; }

    .nav-links {
        position: fixed; 
        top: 0; 
        right: 0; 
        width: 75%; 
        height: 100vh; 
        background-color: #050505; 
        border-left: 1px solid #d4af37; 
        flex-direction: column; 
        justify-content: center; 
        align-items: center; 
        gap: 30px; 
        margin: 0; 
        transform: translateX(100%); 
        transition: transform 0.4s ease-in-out; 
        z-index: 5000; 
        box-shadow: -5px 0 15px rgba(0,0,0,0.8);
    }
    
    .nav-toggle:checked ~ .nav-links { transform: translateX(0); }
    .nav-toggle:checked ~ .nav-burger span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
    .nav-toggle:checked ~ .nav-burger span:nth-child(2) { opacity: 0; }
    .nav-toggle:checked ~ .nav-burger span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }
    
    .nav-links a { font-size: 1.2rem; color: #f0f0f0; }
    
    .nav-links .btn-cv-mobile { 
        display: block !important; 
        margin-top: 20px; 
        padding: 12px 30px; 
        border: 1px solid #d4af37; 
        color: #d4af37 !important; 
        text-decoration: none; 
        text-transform: uppercase; 
        font-weight: 600; 
        font-size: 0.9rem; 
        letter-spacing: 1px; 
        text-align: center; 
    }

    .main-container { margin-top: 100px !important; }

    .featured-card, .featured-card.reverse-layout { 
        grid-template-columns: 1fr; 
        min-height: auto; 
        transform-style: flat !important; 
        transform: none !important; 
        transition: none !important; 
    }
    
    .featured-image { 
        height: 200px; 
        order: -1; 
        border: none; 
        border-bottom: 1px solid rgba(255, 255, 255, 0.05); 
        transform-style: flat !important; 
        transform: none !important; 
    }
    
    .featured-content { 
        padding: 30px 20px; 
        text-align: center; 
        transform: none !important; 
    }
    
    .abstract-visual { 
        font-size: 5rem; 
        transform: none !important; 
        animation: none !important; 
    }
    
    .btn-gold { 
        align-self: center; 
        transform: none !important; 
    }
    
    .project-tag { 
        margin: 0 auto 20px auto; 
    }
}

/* ========================================= */
/* FOOTER                                    */
/* ========================================= */
.site-footer { 
    padding: 20px; 
    text-align: center; 
    color: #d4af37; 
    font-size: 0.9rem; 
    border-top: 1px solid rgba(212, 175, 55, 0.2); 
    background-color: #0a0a0a; 
    margin-top: auto; 
}