/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--surface);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
}

.header-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 3rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.logo-placeholder {
    width: 60px;
    height: 60px;
}

.logo-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.site-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

nav a {
    text-decoration: none;
    color: var(--ink);
    font-weight: 500;
    font-size: 1.05rem;
    transition: color 0.3s ease;
}

nav a:hover,
nav a.active {
    color: var(--primary);
}

/* Mobile menu toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary);
    cursor: pointer;
    padding: 0.5rem;
}

/* Dropdown Menu */
@media (min-width: 769px) {
    .dropdown {
        position: relative;
    }

    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 50%;
        transform: translateX(-50%) translateY(10px);
        background-color: var(--surface);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        border-radius: 8px;
        padding: 0.5rem 0;
        min-width: 200px;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
        display: flex;
        flex-direction: column;
        gap: 0;
        z-index: 1001;
        margin-top: 0.5rem;
    }

    /* Arrow/Triangle for dropdown */
    .dropdown-menu::before {
        content: '';
        position: absolute;
        top: -6px;
        left: 50%;
        transform: translateX(-50%);
        border-left: 6px solid transparent;
        border-right: 6px solid transparent;
        border-bottom: 6px solid var(--surface);
    }

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

    .dropdown-menu li {
        width: 100%;
    }

    .dropdown-menu a {
        display: block;
        padding: 0.75rem 1.5rem;
        white-space: nowrap;
        font-size: 0.95rem;
        color: var(--ink);
        transition: background-color 0.2s;
    }

    .dropdown-menu a:hover {
        background-color: var(--muted);
        color: var(--primary);
    }
}

/* Dropdown Menu - Mobile */
@media (max-width: 768px) {
    .dropdown-menu {
        display: block;
        position: static;
        box-shadow: none;
        padding-left: 1rem;
        opacity: 1;
        visibility: visible;
        transform: none;
        background-color: rgba(0, 0, 0, 0.02);
        margin-top: 0.5rem;
        border-radius: 4px;
    }

    .dropdown-menu a {
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
        color: var(--ink);
        display: block;
    }

    .dropdown-menu a:hover {
        color: var(--primary);
    }
}