:root {
    --color-bg: #faf9f5;
    --color-surface: #ffffff;
    --color-surface-alt: #f1efe8;
    --color-ink: #201f1c;
    --color-ink-soft: #5f5e5a;
    --color-ink-faint: #6f6d66;
    --color-accent: #c15f3c;
    --color-accent-soft: #f3e3db;
    --color-border: rgba(32, 31, 28, 0.12);
    --color-border-strong: rgba(32, 31, 28, 0.28);
    --color-status-ok: #3b6d11;
    --color-status-warn: #854f0b;
    --color-status-off: #a32d2d;
    --shadow-card: 0 0.125rem 0.5rem rgba(32, 31, 28, 0.06);
    --shadow-card-hover: var(--card-shadow-x, 0rem) var(--card-shadow-y, 0.875rem) 1.75rem 0.25rem rgba(232, 178, 60, 0.4);
    --radius-card: 1rem;
    --radius-pill: 62.4375rem;
    --width-hairline: 0.0625rem;
    --duration-fast: 160ms;
    --duration-base: 320ms;
    --perspective-card: 50rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #1b1a17;
        --color-surface: #242320;
        --color-surface-alt: #2d2c28;
        --color-ink: #ece9e2;
        --color-ink-soft: #b3b0a7;
        --color-ink-faint: #918e84;
        --color-accent: #e07b52;
        --color-accent-soft: #3a2a22;
        --color-border: rgba(236, 233, 226, 0.14);
        --color-border-strong: rgba(236, 233, 226, 0.32);
        --color-status-ok: #97c459;
        --color-status-warn: #efa027;
        --color-status-off: #f09595;
        --shadow-card: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.3);
        --shadow-card-hover: var(--card-shadow-x, 0rem) var(--card-shadow-y, 0.875rem) 1.75rem 0.25rem rgba(240, 195, 90, 0.35);
    }
}

* {
    box-sizing: border-box;
}

html {
    color-scheme: light dark;
}

/* flex 直欄 + main 撐滿，確保內容不足一屏時 footer 仍貼齊視窗底部 */
body {
    margin: 0;
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    flex-direction: column;
    background: var(--color-bg);
    color: var(--color-ink);
    font-family: system-ui, -apple-system, "Segoe UI", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

main {
    flex: 1 0 auto;
}

.wrap {
    max-width: 72rem;
    margin-inline: auto;
    padding-inline: 1.25rem;
}

.visually-hidden {
    position: absolute;
    width: 0.0625rem;
    height: 0.0625rem;
    margin: -0.0625rem;
    padding: 0;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.is-hidden {
    display: none;
}

/* ---------- header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: color-mix(in srgb, var(--color-bg) 82%, transparent);
    backdrop-filter: blur(0.75rem);
    border-bottom: var(--width-hairline) solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-block: 0.625rem;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    color: inherit;
}

.brand-logo {
    width: 2.25rem;
    height: 2.25rem;
    display: block;
}

.brand-name {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.slot-search {
    flex: 0 1 18rem;
}

.search-field {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-surface);
    border: var(--width-hairline) solid var(--color-border);
    border-radius: var(--radius-pill);
    padding: 0.375rem 0.875rem;
    color: var(--color-ink-faint);
    transition: border-color var(--duration-fast) ease;
}

.search-field:focus-within {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.icon-search {
    width: 1.125rem;
    height: 1.125rem;
    flex: none;
}

.search-field input {
    width: 100%;
    border: 0;
    background: transparent;
    color: var(--color-ink);
    font: inherit;
    font-size: 0.9375rem;
    outline: none;
}

/* ---------- hero ---------- */

.hero {
    position: relative;
    overflow: hidden;
    border-bottom: var(--width-hairline) solid var(--color-border);
}

.hero-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.9;
    pointer-events: none;
}

.hero-inner {
    position: relative;
    padding-block: 1.25rem 1.125rem;
}

.hero-title {
    margin: 0 0 0.25rem;
    font-size: clamp(1.25rem, 1.05rem + 0.8vw, 1.625rem);
    font-weight: 700;
    letter-spacing: 0.01em;
}

.hero-sub {
    margin: 0;
    color: var(--color-ink-soft);
    font-size: 0.9375rem;
}

/* ---------- filter chips ---------- */

.slot-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-block: 1.5rem 0.25rem;
}

/* tag 種類不足以構成篩選時，build 不輸出 chips，整列隱藏避免噪音 */
.slot-filters:empty {
    display: none;
}

.chip {
    appearance: none;
    border: var(--width-hairline) solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-ink-soft);
    font: inherit;
    font-size: 0.875rem;
    padding: 0.3125rem 1rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: background var(--duration-fast) ease, color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.chip:hover {
    border-color: var(--color-border-strong);
    color: var(--color-ink);
}

.chip.is-active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #ffffff;
}

.chip:focus-visible,
.card:focus-visible,
.empty-reset:focus-visible {
    outline: 0.125rem solid var(--color-accent);
    outline-offset: 0.125rem;
}

/* ---------- card grid ---------- */

.slot-cards {
    padding-block: 1.5rem 3rem;
}

.result-count {
    margin: 0 0 1rem;
    font-size: 0.8125rem;
    color: var(--color-ink-soft);
}

.card-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
    gap: 1.5rem;
}

/* 進場前的隱藏僅在 JS 啟用時套用，無 JS 環境保持完整可見 */
.js-enabled .card-slot {
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity var(--duration-base) ease, transform var(--duration-base) ease;
}

.js-enabled .card-slot.is-visible {
    opacity: 1;
    transform: none;
}

.card {
    position: relative;
    isolation: isolate;
    display: flex;
    flex-direction: column;
    height: 100%;
    border-radius: var(--radius-card);
    text-decoration: none;
    color: inherit;
}

/* 卡面（背景/邊框/陰影）獨立為偽元素：傾斜只動卡面與縮圖，文字元件維持平面清晰；角度由 JS 寫入 */
.card::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: var(--color-surface);
    border: var(--width-hairline) solid var(--color-border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: transform var(--duration-fast) ease, box-shadow var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.card:hover::before {
    transform: perspective(var(--perspective-card)) rotateX(var(--card-tilt-x, 0deg)) rotateY(var(--card-tilt-y, 0deg));
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-border-strong);
}

.card-thumb {
    margin: var(--width-hairline) var(--width-hairline) 0;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-radius: calc(var(--radius-card) - var(--width-hairline)) calc(var(--radius-card) - var(--width-hairline)) 0 0;
    background: linear-gradient(100deg, var(--color-surface-alt) 40%, var(--color-surface) 50%, var(--color-surface-alt) 60%);
    background-size: 200% 100%;
    transition: transform var(--duration-fast) ease;
}

.card:hover .card-thumb {
    transform: perspective(var(--perspective-card)) rotateX(var(--card-tilt-x, 0deg)) rotateY(var(--card-tilt-y, 0deg));
}

/* shimmer 僅在 JS 啟用且圖片尚未載入完成時運轉，避免長駐重繪 */
.js-enabled .card-thumb:not(:has(img.is-loaded)) {
    animation: thumb-shimmer 1.6s linear infinite;
}

.card-thumb:has(img.is-loaded) {
    background: var(--color-surface-alt);
}

.card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity var(--duration-base) ease, transform var(--duration-base) ease;
}

.js-enabled .card-thumb img {
    opacity: 0;
}

.js-enabled .card-thumb img.is-loaded {
    opacity: 1;
}

.card:hover .card-thumb img {
    transform: scale(1.03);
}

/* ---------- disabled card (maintenance) ---------- */

/* 維護中：半透明、禁止游標，關閉所有 hover 特效（翹起、光暈、縮圖縮放、開啟箭頭） */
.card-disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.card-disabled:hover::before {
    transform: none;
    box-shadow: var(--shadow-card);
    border-color: var(--color-border);
}

.card-disabled:hover .card-thumb,
.card-disabled:hover .card-thumb img {
    transform: none;
}

.card-disabled .card-open {
    display: none;
}

@keyframes thumb-shimmer {
    from { background-position: 120% 0; }
    to { background-position: -80% 0; }
}

.card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 0.5rem;
    padding: 1rem 1.125rem 1.125rem;
}

.card-title {
    margin: 0;
    font-size: 1.0625rem;
    font-weight: 700;
    line-height: 1.4;
}

.card-desc {
    margin: 0;
    color: var(--color-ink-soft);
    font-size: 0.9rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-tags {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.card-tag {
    font-size: 0.75rem;
    color: var(--color-ink-soft);
    background: var(--color-surface-alt);
    border-radius: var(--radius-pill);
    padding: 0.125rem 0.625rem;
}

.card-foot {
    margin-top: auto;
    padding-top: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: var(--width-hairline) solid var(--color-border);
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
}

.status-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: currentColor;
}

.status-online {
    color: var(--color-status-ok);
}

.status-online .status-dot {
    animation: status-pulse 2.4s ease-in-out infinite;
}

.status-maintenance {
    color: var(--color-status-warn);
}

.status-offline {
    color: var(--color-status-off);
}

@keyframes status-pulse {
    0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, currentColor 45%, transparent); }
    50% { box-shadow: 0 0 0 0.3125rem color-mix(in srgb, currentColor 0%, transparent); }
}

.card-open {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--color-accent);
}

.icon-arrow {
    width: 1rem;
    height: 1rem;
    transition: transform var(--duration-fast) ease;
}

.card:hover .icon-arrow {
    transform: translateX(0.1875rem);
}

.card-slot-none,
.empty-note {
    text-align: center;
    padding-block: 3rem;
    list-style: none;
}

.card-slot-none {
    color: var(--color-ink-faint);
}

.empty-note-text {
    margin: 0 0 1rem;
    color: var(--color-ink-faint);
}

.empty-reset {
    appearance: none;
    border: var(--width-hairline) solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-ink-soft);
    font: inherit;
    font-size: 0.875rem;
    padding: 0.375rem 1.25rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: color var(--duration-fast) ease, border-color var(--duration-fast) ease;
}

.empty-reset:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.empty-note.is-hidden {
    display: none;
}

/* ---------- footer ---------- */

.site-footer {
    border-top: var(--width-hairline) solid var(--color-border);
    background: var(--color-surface-alt);
}

.footer-inner {
    padding-block: 1.25rem;
}

.footer-copy {
    margin: 0;
    font-size: 0.8125rem;
    color: var(--color-ink-faint);
    text-align: center;
}

.footer-copy a {
    color: inherit;
}

/* ---------- responsive ---------- */

@media (max-width: 40rem) {
    .header-inner {
        flex-wrap: wrap;
    }

    .slot-search {
        flex: 1 1 100%;
        order: 3;
        padding-bottom: 0.375rem;
    }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
    }

    .js-enabled .card-slot,
    .js-enabled .card-thumb img {
        opacity: 1;
        transform: none;
    }
}