/* Clickable prototype navigation layer */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 18px 40px;
    border-bottom: 2px solid var(--wire-line, #999);
    position: sticky;
    top: 0;
    background: #fff;
    z-index: 1000;
}

.site-header .logo-box {
    display: inline-block;
    border: 2px solid var(--wire-text, #333);
    padding: 8px 18px;
    font-weight: bold;
    font-size: 1rem;
    background: #fff;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.nav-menu .nav-link,
.nav-menu .nav-trigger {
    border: 0;
    border-bottom: 1px solid var(--wire-text, #333);
    padding: 0 0 2px;
    font-size: 0.85rem;
    font-weight: bold;
    cursor: pointer;
    background: transparent;
    font-family: inherit;
    color: var(--wire-text, #333);
}

.nav-item {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    min-width: 260px;
    background: #fff;
    border: 2px solid var(--wire-line, #999);
    padding: 10px;
    box-shadow: 0 8px 0 rgba(0,0,0,0.08);
    z-index: 1001;
}

.nav-item:hover .dropdown-menu,
.nav-item:focus-within .dropdown-menu {
    display: grid;
    gap: 6px;
}

.dropdown-menu a {
    display: block;
    padding: 9px 10px;
    border: 1px solid #ddd;
    background: #fafafa;
    font-size: 0.8rem;
    font-weight: bold;
    color: var(--wire-text, #333);
    text-decoration: none;
}

.dropdown-menu a:hover,
.dropdown-menu a:focus {
    background: var(--wire-fill, #eee);
    outline: 2px solid var(--wire-text, #333);
    outline-offset: 0;
}

.dropdown-label {
    display: block;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #777;
    padding: 4px 2px 6px;
}

.proto-note {
    background: #111;
    color: #fff;
    text-align: center;
    padding: 7px 16px;
    font-size: 0.72rem;
    letter-spacing: 1px;
    text-transform: uppercase;
    border-bottom: 2px solid #777;
}

@media (max-width: 900px) {
    .site-header {
        display: block;
        padding: 16px 20px;
    }
    .nav-menu {
        margin: 16px 0;
        align-items: flex-start;
    }
    .dropdown-menu {
        position: static;
        box-shadow: none;
        margin-top: 8px;
    }
}