/* Variables CSS */
:root {
    --primary-color: #38b6ff;
    --secondary-color: #87ceeb;
    --accent-color: #ffd166;
    --dark-color: #1e3a5f;
    --light-color: #f0f9ff;
    --text-color: #333;
    --white: #ffffff;
    --shadow: 0 8px 25px rgba(56, 182, 255, 0.15);
    --transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.1);
    --border-radius: 12px;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header et Navigation */
header {
    position: fixed;
    top: 55px; /* Position avec menu haut */
    left: 0;
    width: 100%;
    z-index: 1001;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

/* Quand il n'y a pas de menu haut, le header est en haut */
body.no-top-menu header {
    top: 0;
}

header.scrolled-up {
    top: 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    transition: var(--transition);
}

header.scrolled .header-container {
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.logo.visible {
    opacity: 1;
    transform: translateY(0);
}

body.no-top-menu .logo {
    opacity: 1 !important;
    transform: translateY(0) !important;
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-left: 10px;
}

/* Navigation principale */
.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-links>li {
    position: relative;
    margin-left: 25px;
}

.nav-links>li>a {
    text-decoration: none;
    color: var(--dark-color);
    font-weight: 600;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
    font-size: 0.95rem;
    white-space: nowrap;
}

.nav-links>li>a:hover {
    color: var(--primary-color);
}

.nav-links>li>a:after {
    content: '';
    position: absolute;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    bottom: 0;
    left: 0;
    transition: var(--transition);
    border-radius: 3px;
}

.nav-links>li>a:hover:after {
    width: 100%;
}

/* Sous-menus */
.nav-links li ul {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: var(--border-radius);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    list-style: none;
    z-index: 1000;
    padding: 10px 0;
}

.nav-links li:hover ul {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-links li ul li {
    margin: 0;
    width: 100%;
}

.nav-links li ul li a {
    display: block;
    padding: 12px 25px;
    color: var(--dark-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-links li ul li a:hover {
    background-color: rgba(56, 182, 255, 0.1);
    color: var(--primary-color);
    border-left: 3px solid var(--primary-color);
    padding-left: 30px;
}

/* Indicateur de sous-menu */
.nav-links>li.has-dropdown>a:after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    margin-left: 5px;
    font-size: 0.8rem;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
}

.mobile-menu-btn:hover {
    transform: rotate(90deg);
}

/* Responsive */
@media (max-width: 1200px) {
    .nav-links>li {
        margin-left: 18px;
    }

    .nav-links>li>a {
        font-size: 0.9rem;
    }
}

@media (max-width: 1100px) {
    .nav-links>li {
        margin-left: 15px;
    }

    .nav-links>li>a {
        font-size: 0.85rem;
    }
}

@media (max-width: 992px) {
    header {
        top: 0; /* Retirer l'espace du menu haut sur mobile */
    }
    
    /* Logo visible sur mobile */
    .logo {
        opacity: 1 !important;
        transform: translateY(0) !important;
    }

    /* Menu mobile */
    .nav-links {
        position: fixed;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100vh;
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 30px 40px;
        transition: var(--transition);
        z-index: 999;
        overflow-y: auto;
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links>li {
        margin: 0 0 25px 0;
        width: 100%;
    }

    .nav-links>li>a {
        font-size: 1.1rem;
        padding: 10px 0;
        display: block;
        width: 100%;
    }

    /* Sous-menus mobile */
    .nav-links li ul {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        padding: 0;
        margin-top: 10px;
        margin-left: 20px;
        display: none;
    }

    .nav-links li ul.active {
        display: block;
    }

    .nav-links li ul li a {
        padding: 8px 15px;
        font-size: 1rem;
    }

    .nav-links>li.has-dropdown>a:after {
        content: '\f078';
        float: right;
        transition: transform 0.3s ease;
    }

    .nav-links>li.has-dropdown.active>a:after {
        transform: rotate(180deg);
    }

    .mobile-menu-btn {
        display: block;
    }
}

@media (max-width: 768px) {
    section {
        padding: 80px 0;
    }
}