/* Header & Navigation */
.header {
    background-color: var(--color-secondary);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 50;
    transition: all 0.3s ease;
    height: 8rem;
}

.header.scrolled {
    height: 4rem;
}

.header-container {
    max-width: 80rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    transition: all 0.3s ease;
    padding: 0 var(--spacing-medium);
    position: relative;
    z-index: 50;
}

@media (min-width: 1440px) {
    .header-container {
        padding: 0;
    }
}

.logo-container {
    position: relative;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-medium);
}

.header-logo {
    transition: all 0.3s ease;
    height: 7rem;
    padding: var(--spacing-medium) 0;
}

.header.scrolled .header-logo {
    opacity: 0;
    transform: translateY(-50%);
}

.header-title {
    user-select: none;
    font-family: var(--font-heading);
    font-size: var(--font-size-xl);
    transition: all 0.3s ease;
    color: var(--color-primary);
    position: absolute;
    opacity: 0;
    transform: translateY(50%);
    white-space: nowrap;
    margin: 0 !important;
}

.header.scrolled .header-title {
    opacity: 1;
    transform: translateY(0);
}

/* Desktop Navigation */
.header-nav {
    display: none;
    height: 100%;
    align-items: center;
}

@media (min-width: 768px) {
    .header-nav {
        display: flex;
    }
}

.nav-item {
    height: 100%;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    background-color: transparent;
    color: white;
    user-select: none;
    transition: background-color 0.3s, color 0.3s;
    text-decoration: none;
}

.nav-item:hover {
    background-color: rgba(140, 209, 203, 0.25);
    color: white;
}

.nav-item[data-active="true"] {
    background-color: var(--color-primary);
    color: var(--color-secondary);
}

/* Mobiel menu knop */
.mobile-menu-button {
    display: block;
    color: var(--color-primary);
    padding: var(--spacing-small);
    background: none;
    border: none;
    cursor: pointer;
}

@media (min-width: 768px) {
    .mobile-menu-button {
        display: none;
    }
}

.menu-icon,
.close-icon {
    width: 1.5rem;
    height: 1.5rem;
    filter: invert(1);
}

.hidden {
    display: none;
}

/* Mobiel menu */
.mobile-menu {
    position: fixed;
    width: 100vw;
    height: calc(100vh - 8rem);
    background-color: var(--color-secondary);
    z-index: 40;
    top: calc(100vh);
    left: 0;
    transition: transform 0.3s ease-in-out;
    transform: translateY(-100vh);
    overflow-y: auto;
}

.header.scrolled + .mobile-menu,
.header.scrolled .mobile-menu {
    top: calc(100vh);
    height: calc(100vh - 4rem);
}

.mobile-menu.open {
    transform: translateY(0);
}

@media (min-width: 768px) {
    .mobile-menu {
        display: none;
    }
}

.mobile-menu-nav {
    display: flex;
    flex-direction: column;
    max-width: 80rem;
    margin: 0 auto;
}

.mobile-nav-item {
    padding: 1rem 1.5rem;
    color: var(--color-primary);
    transition: background-color 0.2s;
    border-top: 1px solid rgba(140, 209, 203, 0.2);
    text-decoration: none;
}

.mobile-nav-item:hover {
    background-color: rgba(140, 209, 203, 0.1);
}