/*
 * Vishow Tools stylesheet: Public primary navigation, Tools mega menu, and responsive menu behavior.
 * Sections are intentionally kept unminified and human-readable for direct maintenance.
 */

:root {
    --site-header-bg: #fff;
    --site-header-text: #334155;
    --site-header-accent: #2563eb;
    --site-header-height: 64px;
    --site-nav-font-size: 15px;
    --site-nav-gap: 30px;
    --site-logo-size: 36px;
    --site-logo-offset-x: 0px;
    --site-logo-offset-y: 0px;
}

.site-header {
    position: relative;
    z-index: 20;
    top: auto;
    border-bottom: 1px solid color-mix(in srgb, var(--site-header-text) 16%, transparent);
    background: var(--site-header-bg);
    color: var(--site-header-text);
    backdrop-filter: none;
}

.site-header.is-sticky {
    position: sticky;
    top: 0;
}

.site-header .top {
    height: var(--site-header-height);
}

.site-header .brand, .site-header .top nav {
    color: var(--site-header-text);
}

.site-header .brand b {
    background: var(--site-header-accent);
}

.site-header .brand strong, .site-header .top nav a:hover, .site-header .top nav a[aria-current="page"] {
    color: var(--site-header-accent);
}

.site-header .browse {
    border-color: color-mix(in srgb, var(--site-header-text) 20%, transparent);
    background: transparent;
    color: var(--site-header-text);
}

.site-header .brand-logo {
    display: block;
    width: var(--site-logo-size);
    height: var(--site-logo-size);
    border-radius: 9px;
    object-fit: contain;
    transform: translate(var(--site-logo-offset-x), var(--site-logo-offset-y));
}

.site-header .top nav {
    display: flex;
    align-self: stretch;
    align-items: stretch;
    gap: var(--site-nav-gap);
    font-size: var(--site-nav-font-size);
    font-weight: 700;
}

.site-header .nav-item {
    display: flex;
    align-items: stretch;
    height: 100%;
}

.site-header .nav-item>a {
    display: inline-flex;
    align-items: center;
    height: 100%;
    white-space: nowrap;
    line-height: 1.2;
}

.site-header.header-style-minimal {
    box-shadow: none;
}

.site-header.header-style-classic {
    box-shadow: 0 8px 24px rgba(15, 23, 42, .07);
}

.site-header.header-style-classic .browse {
    border-color: var(--site-header-accent);
    background: var(--site-header-accent);
    color: #fff;
}

.site-header.header-style-contrast {
    border-bottom: 0;
    box-shadow: 0 8px 28px rgba(15, 23, 42, .16);
}

.site-header.header-style-contrast .browse {
    border-color: var(--site-header-accent);
    background: var(--site-header-accent);
    color: #fff;
}

.site-header .tools-menu>a, .site-header .tools-dropdown a {
    text-decoration: none;
}

.site-header .tools-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    display: grid;
    width: min(1100px, calc(100vw - 40px));
    grid-template-columns: repeat(7, minmax(0, 1fr));
    visibility: hidden;
    transform: translate(-50%, -6px);
    opacity: 0;
    border: 1px solid color-mix(in srgb, var(--site-header-text) 16%, transparent);
    border-radius: 0 0 12px 12px;
    background: var(--site-header-bg);
    box-shadow: 0 18px 40px rgba(15, 23, 42, .14);
    transition: opacity .12s ease, transform .12s ease, visibility .12s;
    pointer-events: none;
}

.site-header .tools-dropdown a {
    display: flex;
    min-height: 66px;
    align-items: center;
    justify-content: center;
    padding: 12px 9px;
    color: var(--site-header-text);
    font-size: 13px;
    font-weight: 700;
    text-align: center;
}

.site-header .tools-dropdown a+a {
    border-left: 1px solid color-mix(in srgb, var(--site-header-text) 12%, transparent);
}

.site-header .tools-dropdown a:hover, .site-header .tools-dropdown a:focus-visible {
    background: color-mix(in srgb, var(--site-header-accent) 9%, var(--site-header-bg));
    color: var(--site-header-accent);
}

.site-header .tools-menu:hover .tools-dropdown, .site-header .tools-menu:focus-within .tools-dropdown, .site-header .tools-menu.is-hover-held .tools-dropdown {
    visibility: visible;
    transform: translate(-50%, 0);
    opacity: 1;
    pointer-events: auto;
}

@media (max-width:900px) {
    .site-header .tools-dropdown {
        display: none;
    }
}

@media (max-width:640px) {
    .site-header .brand-logo {
        width: min(var(--site-logo-size), 40px);
        height: min(var(--site-logo-size), 40px);
    }
}