/* ==========================================================================
   xyhelper-nav — public navigation page.
   ========================================================================== */

html {
    scroll-behavior: smooth;
}

.shell {
    width: 100%;
    max-width: 1340px;
    margin: 0 auto;
    padding: 0 26px;
}

.is-hidden {
    display: none !important;
}

/* --- Top bar -------------------------------------------------------------- */
.topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    border-bottom: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 78%, transparent);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
}

.topbar-inner {
    display: flex;
    align-items: center;
    gap: 14px;
    height: 64px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    min-width: 0;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.brand-logo {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    flex: none;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #fff;
    font-size: 15px;
    font-weight: 800;
    box-shadow: 0 8px 18px -8px var(--accent);
}

.brand-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
}

/* --- Hero ----------------------------------------------------------------- */
.hero {
    padding: 62px 0 34px;
    text-align: center;
}

.hero h1 {
    font-size: clamp(30px, 5.2vw, 48px);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    background: linear-gradient(120deg, var(--text) 20%, var(--accent) 60%, var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    max-width: 620px;
    margin: 14px auto 0;
    color: var(--text-dim);
    font-size: 15.5px;
}

.announcement {
    display: none;
    max-width: 760px;
    margin: 22px auto 0;
    padding: 12px 18px;
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
    border-radius: var(--radius);
    background: var(--accent-soft);
    color: var(--text);
    font-size: 14px;
    text-align: left;
}

.announcement.is-visible {
    display: block;
}

/* --- Search --------------------------------------------------------------- */
.search {
    position: relative;
    max-width: 620px;
    margin: 30px auto 0;
}

.search-field {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 56px;
    padding: 0 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: var(--surface-2);
    box-shadow: var(--shadow);
    transition: border-color var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}

.search-field:focus-within {
    border-color: color-mix(in srgb, var(--accent) 60%, transparent);
    box-shadow: 0 0 0 4px var(--accent-soft), var(--shadow);
}

.search-field .icon {
    width: 20px;
    height: 20px;
    color: var(--text-faint);
}

.search-field input {
    flex: 1;
    min-width: 0;
    border: none;
    background: none;
    color: var(--text);
    font-size: 15.5px;
    outline: none;
}

.search-field input::placeholder {
    color: var(--text-faint);
}

.kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 7px;
    border: 1px solid var(--border);
    border-bottom-width: 2px;
    border-radius: 7px;
    background: var(--surface);
    color: var(--text-faint);
    font-size: 12px;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.search-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    max-width: 620px;
    margin: 12px auto 0;
    padding: 0 4px;
    color: var(--text-faint);
    font-size: 12.5px;
}

.engines {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: center;
}

.engine {
    padding: 4px 10px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text-dim);
    font-size: 12.5px;
    transition: all var(--speed) var(--ease);
}

.engine:hover {
    color: var(--text);
    border-color: var(--border-strong);
    transform: translateY(-1px);
}

/* --- Layout --------------------------------------------------------------- */
.layout {
    display: grid;
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
    padding-bottom: 70px;
}

.sidebar {
    position: sticky;
    top: 86px;
}

.sidebar-title {
    padding: 0 12px 10px;
    color: var(--text-faint);
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.nav-list {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border: 1px solid transparent;
    border-radius: 12px;
    color: var(--text-dim);
    font-size: 14px;
    transition: background var(--speed) var(--ease), color var(--speed) var(--ease),
        border-color var(--speed) var(--ease);
}

.nav-item:hover {
    background: var(--surface);
    color: var(--text);
}

.nav-item.active {
    background: var(--surface-2);
    border-color: var(--border);
    color: var(--text);
    font-weight: 600;
}

.nav-item .emoji {
    width: 20px;
    text-align: center;
    font-size: 15px;
}

.nav-item .count {
    margin-left: auto;
    color: var(--text-faint);
    font-size: 12px;
    font-weight: 500;
}

/* --- Category sections ---------------------------------------------------- */
.cat {
    margin-bottom: 40px;
    scroll-margin-top: 92px;
}

.cat-head {
    display: flex;
    align-items: center;
    gap: 11px;
    margin-bottom: 16px;
}

.cat-head .emoji {
    font-size: 19px;
}

.cat-head h2 {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.cat-head .count {
    padding: 1px 9px;
    border-radius: 999px;
    background: var(--surface-2);
    color: var(--text-faint);
    font-size: 12px;
    font-weight: 600;
}

.cat-head .line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--border), transparent);
}

/* --- Cards ---------------------------------------------------------------- */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(238px, 1fr));
    gap: 14px;
}

.card {
    display: flex;
    gap: 13px;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--speed) var(--ease), border-color var(--speed) var(--ease),
        box-shadow var(--speed) var(--ease), background var(--speed) var(--ease);
    animation: card-in 0.42s var(--ease) both;
}

.card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent) 42%, var(--border));
    background: var(--surface-2);
    box-shadow: var(--shadow);
}

.card:active {
    transform: translateY(-1px);
}

@keyframes card-in {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
}

.card-icon {
    position: relative;
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    flex: none;
    overflow: hidden;
    border-radius: 12px;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14);
}

.card-icon img {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    transform: translate(-50%, -50%);
    object-fit: contain;
    border-radius: 5px;
}

.card-body {
    min-width: 0;
    flex: 1;
}

.card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14.5px;
    font-weight: 650;
    letter-spacing: -0.005em;
}

.card-title .name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.card-title .hits {
    flex: none;
    margin-left: auto;
    color: var(--text-faint);
    font-size: 11px;
    font-weight: 500;
}

.card-desc {
    display: -webkit-box;
    margin-top: 3px;
    overflow: hidden;
    color: var(--text-dim);
    font-size: 12.5px;
    line-height: 1.5;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.card-host {
    display: block;
    margin-top: 6px;
    overflow: hidden;
    color: var(--text-faint);
    font-size: 11.5px;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* --- Search results ------------------------------------------------------- */
.search-empty {
    display: none;
    padding: 60px 20px;
    text-align: center;
    color: var(--text-faint);
}

.search-empty.is-visible {
    display: block;
}

mark {
    padding: 0 2px;
    border-radius: 4px;
    background: var(--accent-soft);
    color: var(--accent);
}

/* --- Footer & misc -------------------------------------------------------- */
.site-footer {
    padding: 30px 0 44px;
    border-top: 1px solid var(--border);
    color: var(--text-faint);
    font-size: 13px;
    text-align: center;
}

.site-footer a {
    color: var(--text-dim);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.site-footer .sep {
    margin: 0 9px;
    opacity: 0.5;
}

.to-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 30;
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border: 1px solid var(--border);
    border-radius: 50%;
    background: var(--surface-solid);
    box-shadow: var(--shadow);
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: all var(--speed) var(--ease);
}

.to-top.is-visible {
    opacity: 1;
    transform: none;
    pointer-events: auto;
}

.to-top:hover {
    border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
    color: var(--accent);
}

.skeleton-card {
    height: 72px;
}

/* --- Responsive ----------------------------------------------------------- */
@media (max-width: 980px) {
    .layout {
        grid-template-columns: minmax(0, 1fr);
        gap: 18px;
    }

    .sidebar {
        position: sticky;
        top: 64px;
        z-index: 20;
        margin: 0 -26px;
        padding: 12px 26px;
        background: color-mix(in srgb, var(--bg) 88%, transparent);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border);
    }

    .sidebar-title {
        display: none;
    }

    .nav-list {
        flex-direction: row;
        gap: 8px;
        overflow-x: auto;
        scrollbar-width: none;
    }

    .nav-list::-webkit-scrollbar {
        display: none;
    }

    .nav-item {
        flex: none;
        border-color: var(--border);
        background: var(--surface);
    }

    .nav-item .count {
        margin-left: 2px;
    }

    .hero {
        padding: 40px 0 26px;
    }
}

@media (max-width: 560px) {
    .shell {
        padding: 0 16px;
    }

    .sidebar {
        margin: 0 -16px;
        padding: 10px 16px;
    }

    .grid {
        grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
    }

    .search-meta {
        flex-direction: column;
    }
}