:root {
    --blue: #3498db;
    --red: #ff4757;
    --white: #ffffff;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Montserrat', sans-serif; }
html { scroll-behavior: smooth; }
body { background: #000; color: var(--white); overflow-x: hidden; width: 100%; }

/* NAVBAR RÉTABLIE */
nav {
    position: fixed; top: 0; width: 100%; padding: 20px 0;
    background: rgba(0,0,0,0.9); backdrop-filter: blur(15px);
    z-index: 1000; display: flex; justify-content: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.nav-container { width: 90%; max-width: 1200px; display: flex; justify-content: space-between; align-items: center; }
.brand { font-weight: 900; letter-spacing: 1px; font-size: 0.9rem; color: var(--blue); }

.menu-desktop { display: flex; align-items: center; }
.menu-desktop a { 
    color: white; text-decoration: none; margin-left: 20px; 
    font-size: 0.75rem; font-weight: 700; text-transform: uppercase; 
    transition: 0.3s; opacity: 0.8;
}
.menu-desktop a:hover { opacity: 1; color: var(--blue); }

.nav-don { 
    color: var(--red) !important; border: 2px solid var(--red); 
    padding: 8px 15px; border-radius: 5px; opacity: 1 !important;
}
.nav-don:hover { background: var(--red); color: white !important; }

/* HERO - ACCUEIL */
.hero { 
    height: 100vh; width: 100%; position: relative; 
    display: flex; flex-direction: column; align-items: center; justify-content: center; 
    text-align: center; overflow: hidden;
}
.hero-bg { 
    position: absolute; top:0; left:0; width:100%; height:100%; 
    background-size: cover; background-position: center; filter: brightness(0.4); 
}

/* ANIMATIONS LOGO GÉANT */
.main-logo-giant {
    width: 480px; max-width: 85vw; position: relative; z-index: 10;
    filter: drop-shadow(0 0 30px rgba(255,255,255,0.3));
    animation: zoomInLogo 1.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.reveal-title {
    font-size: clamp(2rem, 8vw, 5rem); font-weight: 900; position: relative; z-index: 10;
    margin-top: 10px; opacity: 0; animation: fadeUpTitle 1.2s ease-out 0.6s forwards;
}

/* PRÉSENTATION */
.info-section { min-height: 100vh; width: 100%; position: relative; display: flex; align-items: center; justify-content: center; padding: 100px 20px; }
.info-bg { position: absolute; top:0; left:0; width:100%; height:100%; background-size: cover; background-position: center; opacity: 0.3; }
.content-box { 
    max-width: 850px; position: relative; z-index: 10;
    background: rgba(255,255,255,0.05); padding: clamp(30px, 5vw, 60px); 
    border-radius: 30px; border: 1px solid rgba(255,255,255,0.1); backdrop-filter: blur(10px);
}
h2 { font-size: clamp(1.8rem, 5vw, 3rem); margin-bottom: 20px; color: var(--blue); font-weight: 900; }
.content-box p { font-size: clamp(1rem, 3vw, 1.3rem); line-height: 1.6; margin-bottom: 25px; }

.cta-btn {
    display: inline-block; background: var(--red); color: white; padding: 18px 40px;
    border-radius: 50px; text-decoration: none; font-weight: 900; transition: 0.4s;
}
.cta-btn:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(255, 71, 87, 0.4); }

/* SPLIT SCREEN */
.split-container { display: flex; min-height: 80vh; width: 100%; flex-wrap: wrap; }
.split-side { 
    flex: 1; min-width: 320px; min-height: 50vh; 
    position: relative; display: flex; align-items: center; justify-content: center;
    background-size: cover; background-position: center; transition: 0.6s;
}
.overlay-dark { position: absolute; width: 100%; height: 100%; background: rgba(0,0,0,0.7); }
.side-text { position: relative; z-index: 10; text-align: center; }
.side-text h3 { font-size: clamp(2rem, 5vw, 4rem); font-weight: 900; }
.btn-outline { 
    display: inline-block; margin-top: 15px; padding: 10px 25px; 
    border: 2px solid white; color: white; text-decoration: none; font-weight: 700; transition: 0.3s; 
}
.btn-outline:hover { background: white; color: black; }

/* ANIMATIONS */
@keyframes zoomInLogo { 0% { opacity: 0; transform: scale(0.4); filter: blur(15px); } 100% { opacity: 1; transform: scale(1); filter: blur(0); } }
@keyframes fadeUpTitle { 0% { opacity: 0; transform: translateY(40px); } 100% { opacity: 1; transform: translateY(0); } }

/* RESPONSIVE MOBILE */
@media (max-width: 768px) {
    .menu-desktop { 
        position: fixed; bottom: 0; left: 0; width: 100%; 
        background: rgba(0,0,0,0.95); justify-content: space-around; 
        padding: 15px 5px; border-top: 1px solid rgba(255,255,255,0.1);
    }
    .menu-desktop a { margin: 0; font-size: 0.65rem; }
    .nav-don { padding: 5px 10px; }
    .hero { height: 85vh; }
    .main-logo-giant { width: 250px; }
    .split-container { flex-direction: column; }
    .info-section { padding-bottom: 120px; } /* Pour pas que le menu mobile cache le texte */
}