@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Palette Institutionnelle */
    --brand-dark: #001529;
    --brand-blue: #0061ff;
    --brand-deep: #004ecc;
    --brand-light: #f0f7ff;
    --accent: #00d2ff;
    
    /* Système de Gradients */
    --grad-premium: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand-blue) 100%);
    --grad-surface: linear-gradient(180deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.4) 100%);

    /* Courbes de mouvement fluides */
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --transition-main: all 0.4s var(--ease-out-expo);
    
    /* Ombres Soft */
    --shadow-sm: 0 2px 4px rgba(0,21,41,0.05);
    --shadow-md: 0 10px 30px -5px rgba(0,21,41,0.1);
    --shadow-lg: 0 25px 50px -12px rgba(0,21,41,0.15);
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--brand-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* --- BOUTONS DYNAMIQUES --- */
.btn-premium {
    position: relative;
    padding: 14px 32px;
    border-radius: 16px;
    font-weight: 700;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: 10px;
    background: var(--brand-blue);
    color: white;
    border: none;
    cursor: pointer;
    transition: var(--transition-main);
    box-shadow: 0 8px 20px -6px rgba(0, 97, 255, 0.4);
}

.btn-premium:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px -6px rgba(0, 97, 255, 0.5);
    background: var(--brand-deep);
    color: white;
}

.btn-premium::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 20%;
    height: 200%;
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(30deg);
    transition: 0.7s;
}

.btn-premium:hover::after {
    left: 120%;
}

/* --- ICONS ANIMÉES --- */
.icon-container {
    width: 64px;
    height: 64px;
    background: var(--brand-light);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-blue);
    font-size: 24px;
    transition: var(--transition-main);
}

.card-dynamic:hover .icon-container {
    background: var(--brand-blue);
    color: white;
    transform: rotate(-10deg) scale(1.1);
}

/* --- CARTES "GLASS" --- */
.glass-card {
    background: var(--grad-surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 32px;
    padding: 2.5rem;
    transition: var(--transition-main);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 1);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-blue);
}

/* --- NOUVELLE NAVIGATION (MODIFIÉE) --- */

/* --- GESTION DE LA NAVIGATION --- */
/* 1. État de base : On prépare la transition pour le transform */
/* État de base de la Nav */
#main-nav {
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.3s ease;
    will-change: transform;
    transform: translateY(0);
}

/* Cache la nav proprement */
.nav-hidden {
    transform: translateY(-100%) !important;
}

/* Style quand on a scrollé (Verre plus opaque) */
.nav-scrolled-active #nav-content {
    background-color: rgba(255, 255, 255, 0.98) !important;
    border-color: rgba(59, 130, 246, 0.1) !important;
    box-shadow: 0 15px 30px -10px rgba(0, 0, 0, 0.1);
}

/* Change la couleur des liens automatiquement */
.nav-scrolled-active #nav-links a {
    color: #0f172a !important;
}

.nav-scrolled-active #nav-logo img {
    filter: brightness(0.8); /* Ajuste le logo si besoin */
}