/* Header et navigation */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    border-bottom: 1px solid #EBEBEB;
    transition: box-shadow 0.3s;
    animation: slideDown 0.6s ease-out;
}

header.scrolled {
    box-shadow: 0 1px 2px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95);
}

.header-container {
    max-width: 1760px;
    margin: 0 auto;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-warm);
    letter-spacing: 1px;
    font-family: 'Poppins', sans-serif;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 32px;
    align-items: center;
}

nav a {
    color: var(--dark-gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 1px;
    transition: color 0.3s;
    font-family: -apple-system, sans-serif;
}

nav a:hover {
    color: var(--primary-warm);
}

.btn-reserve {
    background: linear-gradient(135deg, var(--primary-warm) 0%, var(--warm-orange) 100%);
    color: var(--white);
    padding: 10px 24px;
    border-radius: 24px;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-reserve:hover {
    transform: scale(1.04);
    box-shadow: 0 4px 12px rgba(193, 122, 79, 0.4);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}