/* ============================================================
   Lab Notes — 實驗室筆記索引頁
   沿用 dslab.css 的色板（紙／墨／朱印）與字級慣例，命名對應 articles.css 的 art-*
   分類色與主圖一致：語音＝印章紅 #B23A2E、模型＝靛藍 #2E5074
   ============================================================ */

.lab-main {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: clamp(2.5rem, 5vw, 4.5rem) var(--pad-x) 0;
}

.mono { font-family: var(--mono); }

/* ── 頁首 ── */
.lab-head {
    max-width: 920px;
    padding-bottom: clamp(2rem, 4vw, 3.2rem);
    border-bottom: 1px solid var(--rule-strong);
}

.lab-eyebrow {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--vermilion);
    letter-spacing: 0.28em;
    text-transform: uppercase;
    margin-bottom: 1.6rem;
}

.lab-title {
    font-family: var(--sans);
    font-weight: 800;
    font-size: clamp(3.2rem, 8vw, 6rem);
    line-height: 0.96;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin-bottom: 1.6rem;
}

.lab-sub {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: clamp(1rem, 1.3vw, 1.2rem);
    font-weight: 400;
    line-height: 1.85;
    color: var(--ink-dim);
    max-width: 46ch;
    margin-bottom: 1.8rem;
}

.lab-meta {
    font-size: 0.78rem;
    color: var(--ink-fade);
    letter-spacing: 0.12em;
}

/* ── 分類篩選 ── */
.lab-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin: clamp(1.8rem, 3vw, 2.6rem) 0 clamp(2rem, 4vw, 3rem);
}

.lab-filter button {
    font-family: var(--sans);
    font-weight: 500;
    font-size: 0.86rem;
    letter-spacing: 0.02em;
    color: var(--ink-dim);
    background: transparent;
    border: 1px solid var(--rule-strong);
    border-radius: 999px;
    padding: 0.5rem 1.15rem;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.lab-filter button:hover { border-color: var(--ink); color: var(--ink); }

.lab-filter button.active {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--paper);
}

/* ── 卡片牆 ── */
.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(430px, 1fr));
    gap: clamp(2rem, 3.5vw, 3.2rem);
    padding-bottom: clamp(1.4rem, 2.5vw, 2.2rem);
}

.lab-loading { color: var(--ink-faint); letter-spacing: 0.2em; font-size: 0.8rem; }

.lab-card {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
    background: transparent;
}

/* 主圖：資訊卡片（1200×675），由 lab.json 產生 */
.lab-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--paper-warm);
    border: 1px solid var(--rule);
}

.lab-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.lab-card:hover .lab-cover img { transform: scale(1.025); }

.lab-body { padding-top: 1.3rem; }

.lab-line {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 0.85rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    color: var(--ink-fade);
}

/* 分類 chip 的顏色跟主圖同一套色 */
.lab-chip {
    --c: var(--vermilion);
    display: inline-flex;
    align-items: center;
    gap: 0.42rem;
    color: var(--c);
    font-weight: 500;
}

.lab-chip::before {
    content: "";
    width: 9px;
    height: 9px;
    background: var(--c);
    display: block;
}

.lab-card[data-theme="voice"] .lab-chip { --c: #B23A2E; }
.lab-card[data-theme="model"] .lab-chip { --c: #2E5074; }
.lab-card[data-theme="agent"] .lab-chip { --c: #2F5D4B; }
.lab-card[data-theme="tools"] .lab-chip { --c: #8A5A2B; }

.lab-h {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 700;
    font-size: clamp(1.35rem, 1.9vw, 1.7rem);
    line-height: 1.35;
    letter-spacing: -0.01em;
    color: var(--ink);
    margin-bottom: 0.7rem;
    transition: color 0.25s ease;
}

.lab-card:hover .lab-h { color: var(--vermilion-deep); }

.lab-desc {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 300;
    font-size: 0.95rem;
    line-height: 1.85;
    color: var(--ink-dim);
    margin-bottom: 1rem;
}

.lab-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }

.lab-tag {
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    color: var(--ink-fade);
    border: 1px solid var(--rule);
    border-radius: 999px;
    padding: 0.24rem 0.62rem;
}

.lab-tail {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.9rem;
    color: var(--ink-faint);
    border-top: 1px solid var(--rule);
    padding: 1.7rem 0 clamp(2.5rem, 5vw, 4rem);
}

/* ── 手機 ── */
@media (max-width: 720px) {
    .lab-grid { grid-template-columns: 1fr; gap: 2.4rem; }
    .lab-sub { max-width: none; }
}