/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Project detail — 個別專案頁通用樣式（配合 dslab.css 變數）
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

.pd-hero {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: clamp(3rem, 6vw, 6rem) var(--pad-x) clamp(2rem, 4vw, 4rem);
    border-bottom: 1px solid var(--rule-strong);
}
.pd-back {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid transparent;
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.pd-back:hover { color: var(--vermilion); border-bottom-color: var(--vermilion); }
.pd-eyebrow {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--vermilion);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--vermilion);
    display: inline-block;
}
.pd-hero h1 {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 700;
    font-size: clamp(2.6rem, 5.5vw, 4.5rem);
    line-height: 1.02;
    letter-spacing: -0.03em;
    color: var(--ink);
    margin-bottom: 1.5rem;
}
.pd-lead {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: clamp(1rem, 1.3vw, 1.2rem);
    line-height: 1.85;
    color: var(--ink-dim);
    max-width: 54ch;
    margin-bottom: 1.8rem;
}
.pd-meta { display: flex; gap: 0.7rem; flex-wrap: wrap; }
.pd-tag {
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--ink-dim);
    background: var(--paper-warm);
    border: 1px solid var(--rule);
    padding: 0.35rem 0.8rem;
    border-radius: 2rem;
}
.pd-tag-open { color: var(--vermilion); border-color: var(--vermilion); }

/* section */
.pd-section {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: clamp(3rem, 5vw, 5rem) var(--pad-x);
    border-top: 1px solid var(--rule);
}
.pd-section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2.2rem;
    flex-wrap: wrap;
}
.pd-section-head h2 {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 700;
    font-size: clamp(1.6rem, 2.5vw, 2.2rem);
    color: var(--ink);
    letter-spacing: -0.02em;
}
.pd-section-head .side {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--ink-fade);
    letter-spacing: 0.08em;
}

/* videos — responsive 16:9 YouTube */
.pd-videos { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 1.5rem; }
.pd-video figure { margin: 0; }
.pd-video .frame {
    position: relative; width: 100%; padding-bottom: 56.25%;
    background: var(--ink); border-radius: 0.6rem; overflow: hidden; border: 1px solid var(--rule);
}
.pd-video .frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.pd-video figcaption {
    font-family: 'Noto Sans TC', var(--sans);
    font-size: 0.9rem; color: var(--ink-dim); margin-top: 0.7rem;
}

/* gallery */
.pd-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.pd-gallery a { display: block; overflow: hidden; border-radius: 0.5rem; transition: transform 0.3s cubic-bezier(0.2,0.8,0.2,1); border: 1px solid var(--rule); }
.pd-gallery a:hover { transform: translateY(-3px); }
.pd-gallery img { width: 100%; object-fit: cover; background: var(--paper-warm); display: block; aspect-ratio: 16 / 10; }

/* features */
.pd-feat { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.2rem; }
.pd-feat-card { background: var(--paper-warm); border: 1px solid var(--rule); border-radius: 0.6rem; padding: 1.4rem 1.5rem; }
.pd-feat-card h3 {
    font-family: 'Noto Sans TC', var(--sans);
    font-weight: 600; font-size: 1.05rem; color: var(--ink);
    margin-bottom: 0.5rem; display: flex; align-items: center; gap: 0.5rem;
}
.pd-feat-card p { font-family: 'Noto Sans TC', var(--sans); font-size: 0.9rem; line-height: 1.7; color: var(--ink-dim); }

/* prose 說明段 */
.pd-prose { max-width: 60ch; }
.pd-prose p { font-family: 'Noto Sans TC', var(--sans); font-size: 1rem; line-height: 1.9; color: var(--ink-dim); margin-bottom: 1.2rem; }
.pd-prose strong { color: var(--ink); font-weight: 600; }

/* download */
.pd-download { max-width: var(--max-w); margin: 0 auto; padding: clamp(3rem, 5vw, 5rem) var(--pad-x); }
.pd-dl-box {
    background: var(--ink); border-radius: 1rem; padding: clamp(2rem, 4vw, 3.5rem);
    display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap;
}
.pd-dl-box .dl-text h3 { font-family: 'Noto Sans TC', var(--sans); font-weight: 700; font-size: 1.5rem; color: var(--paper); margin-bottom: 0.6rem; }
.pd-dl-box .dl-text p { font-family: 'Noto Sans TC', var(--sans); font-size: 0.92rem; color: var(--paper-warmer); line-height: 1.7; max-width: 46ch; }
.pd-dl-btn {
    font-family: 'Noto Sans TC', var(--sans); font-weight: 700; font-size: 1.05rem;
    background: var(--vermilion); color: #fff; padding: 1rem 2.2rem; border-radius: 0.7rem;
    white-space: nowrap; transition: background 0.3s; border: none; cursor: pointer; text-align: center;
}
.pd-dl-btn:hover { background: var(--vermilion-deep); }
.pd-dl-note { font-family: var(--mono); font-size: 0.72rem; color: var(--ink-fade); margin-top: 1rem; letter-spacing: 0.05em; }
@media (max-width: 640px) { .pd-dl-box { flex-direction: column; align-items: flex-start; } }