/* ==========================================
   HEADER & NAVIGATION
   ========================================== */
header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

header.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    font-size: 2.5rem;
}

.logo-text h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin: 0;
    font-weight: 700;
}

.logo-text p {
    font-size: 0.85rem;
    color: var(--secondary-color);
    margin: 0;
    font-weight: 400;
}

/* Navigation principale */
.main-nav ul {
    display: flex;
    gap: 30px;
    align-items: center;
}

.main-nav a {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 1rem;
    padding: 8px 15px;
    border-radius: 5px;
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--secondary-color);
    background-color: rgba(52, 152, 219, 0.1);
}

/* Bouton menu mobile */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: var(--primary-color);
    cursor: pointer;
    padding: 5px;
    transition: var(--transition);
}

.menu-toggle:hover {
    color: var(--secondary-color);
}

/* Sous-menu déroulant */
.has-submenu {
    position: relative;
}

.submenu-arrow {
    font-size: 0.7rem;
    margin-left: 4px;
    transition: transform 0.25s ease;
    display: inline-block;
}

.has-submenu:hover .submenu-arrow {
    transform: rotate(180deg);
}

.submenu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.14);
    min-width: 260px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 100;
    overflow: hidden;
    border: 1px solid #eee;
}

.has-submenu:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.submenu li {
    border-bottom: 1px solid #f0f0f0;
}

.submenu li:last-child {
    border-bottom: none;
}

.submenu a {
    display: block;
    padding: 11px 20px;
    color: var(--primary-color);
    font-size: 0.92rem;
    font-weight: 500;
    white-space: nowrap;
    border-radius: 0;
    background: none;
}

.submenu a:hover,
.submenu a.active {
    background: rgba(52, 152, 219, 0.08);
    color: var(--secondary-color);
    padding-left: 24px;
}

/* Mobile — submenu en accord */
@media (max-width: 768px) {
    .submenu {
        position: static;
        transform: none;
        box-shadow: none;
        border: none;
        border-radius: 0;
        opacity: 1;
        visibility: visible;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease;
        background: #f4f8fc;
        margin: 0;
    }

    .has-submenu.open .submenu {
        max-height: 500px;
    }

    .submenu li {
        border-bottom: 1px solid #e4eaf0;
    }

    .submenu a {
        padding: 12px 30px;
        font-size: 0.9rem;
    }

    .submenu-arrow {
        float: right;
    }
}
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .main-nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background-color: var(--white);
        transition: left 0.3s ease;
        box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .main-nav ul {
        flex-direction: column;
        padding: 30px 20px;
        gap: 0;
    }
    
    .main-nav li {
        width: 100%;
        border-bottom: 1px solid #eee;
    }
    
    .main-nav a {
        display: block;
        padding: 15px;
        width: 100%;
    }
    
    .logo-text h1 {
        font-size: 1.2rem;
    }
    
    .logo-text p {
        font-size: 0.75rem;
    }
    
    .logo-icon {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 10px 15px;
    }
    
    .logo-text h1 {
        font-size: 1rem;
    }
    
    .logo-text p {
        display: none;
    }
}