/* AI Taiwan 101 — page-level layout & RWD
   styles.css holds design tokens & component primitives — this file holds page layout. */

/* layout container */
.ai101 .wrap { padding-left: 56px; padding-right: 56px; }

/* site footer override — styles.css gives `padding: 36px 0 30px`; we add LR */
.ai101 .site-footer { padding: 36px 56px 30px; }
.ai101 .site-footer-row { /* hooks for layout in footer.php */ }

/* nav */
.ai101 .nav { padding: 22px 56px; border-bottom: 1.5px solid var(--line); background: var(--cream); }
.ai101 .nav .nav-mobile-toggle { display: none; }

/* logo */
.ai101 .logo {
  position: relative; display: inline-flex; align-items: center; gap: 10px;
  font-family: "DM Sans", "Noto Sans TC", sans-serif;
  font-weight: 800; letter-spacing: -0.02em;
}
.ai101 .logo-mark { position: relative; width: 34px; height: 34px; flex: 0 0 34px; }
.ai101 .logo-mark .sparkle { position: absolute; top: -4px; right: -5px; }
.ai101 .logo .accent { color: var(--coral); }

/* hero */
.ai101 .hero {
  position: relative; padding: 72px 56px 56px; overflow: hidden;
}
.ai101 .hero-blob-1 { position: absolute; top: 20px; right: -60px; z-index: 0; }
.ai101 .hero-blob-2 { position: absolute; top: 200px; right: 220px; z-index: 0; opacity: .8; }
.ai101 .hero-sparkle-1 { position: absolute; top: 88px; right: 480px; }
.ai101 .hero-sparkle-2 { position: absolute; top: 320px; right: 110px; }
.ai101 .hero-content { position: relative; z-index: 1; max-width: 780px; }
.ai101 .hero h1 { font-size: 64px; line-height: 1.1; letter-spacing: -0.025em; max-width: 800px; margin-bottom: 22px; }
.ai101 .hero p.lead { font-size: 20px; color: var(--ink-2); line-height: 1.7; max-width: 640px; margin-bottom: 36px; }
.ai101 .hero-cta-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.ai101 .hero-cta-row .meta { color: var(--ink-3); font-size: 14px; }
.ai101 .hero-cta-row .meta strong { color: var(--ink); font-weight: 800; }

.ai101 .highlight { position: relative; display: inline-block; }
.ai101 .highlight .under {
  position: absolute; left: 0; bottom: -4px;
  width: 100%; height: 12px;
  pointer-events: none;
}

/* filter bar */
.ai101 .filter-bar {
  padding: 32px 56px 40px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  border-top: 1.5px solid var(--line);
  flex-wrap: wrap;
}
.ai101 .filter-bar .pills { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.ai101 .filter-bar .pills .label { font-size: 14px; color: var(--ink-3); font-weight: 500; margin-right: 4px; }
.ai101 .filter-bar .all-link { font-size: 14px; font-weight: 700; color: var(--ink); display: inline-flex; align-items: center; gap: 6px; }

/* card grid */
.ai101 .grid { padding: 8px 56px 64px; }
.ai101 .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

/* category strip */
.ai101 .strip { padding: 24px 56px 56px; }
.ai101 .strip h2 { font-size: 28px; margin-bottom: 20px; }
.ai101 .strip-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ai101 .strip-card {
  padding: 28px 28px 24px; border-radius: var(--r-lg);
  border: 1.5px solid var(--line);
  display: flex; flex-direction: column; gap: 14px;
  min-height: 200px; position: relative; overflow: hidden;
}
.ai101 .strip-card.cat-tool    { background: var(--mint-soft); }
.ai101 .strip-card.cat-founder { background: var(--coral-soft); }
.ai101 .strip-card.cat-trend   { background: var(--yellow-soft); }
.ai101 .strip-card p { font-size: 16px; line-height: 1.6; color: var(--ink-2); max-width: 320px; }
.ai101 .strip-card .count {
  font-family: "DM Sans", sans-serif; font-weight: 800; font-size: 26px; color: var(--ink);
}
.ai101 .strip-card .count small { font-size: 13px; color: var(--ink-3); font-weight: 500; }
.ai101 .strip-card .footer-row { margin-top: auto; display: flex; align-items: center; justify-content: space-between; }
.ai101 .strip-card .arrow {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--ink); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
}

/* card thumb override: real <img> */
.ai101 .card-thumb img { display: block; width: 100%; height: 100%; object-fit: cover; }
.ai101 .card-thumb .play-btn {
  position: absolute; right: 14px; bottom: 14px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--ink); color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,.18);
}

/* list page header */
.ai101 .listhead {
  padding: 56px 56px 36px; position: relative; overflow: hidden;
}
.ai101 .listhead .eyebrow { font-size: 13px; color: var(--ink-3); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }
.ai101 .listhead h1 { font-size: 56px; letter-spacing: -0.025em; margin-top: 10px; line-height: 1.1; }
.ai101 .listhead p { font-size: 17px; color: var(--ink-2); margin-top: 18px; max-width: 540px; line-height: 1.7; }
.ai101 .listhead .pillrow { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 32px; }
.ai101 .listhead .pillrow .count-meta { margin-left: auto; font-size: 14px; color: var(--ink-3); }

/* detail page */
.ai101 .breadcrumb {
  padding: 24px 56px 0; font-size: 13px; color: var(--ink-3);
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.ai101 .breadcrumb a { color: var(--ink-2); font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.ai101 .breadcrumb .sep { color: var(--line-strong); }

.ai101 .detail-header { padding: 36px 56px 28px; max-width: 980px; position: relative; }
.ai101 .detail-header h1 { font-size: 52px; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 22px; max-width: 900px; }
.ai101 .detail-lead { font-size: 19px; line-height: 1.7; color: var(--ink-2); max-width: 820px; margin-bottom: 24px; }
.ai101 .post-meta {
  display: flex; align-items: center; gap: 14px; font-size: 14px; flex-wrap: wrap;
}
.ai101 .post-meta .ch { display: inline-flex; align-items: center; gap: 6px; color: var(--ink-2); font-weight: 700; }
.ai101 .post-meta .dot {
  width: 18px; height: 18px; border-radius: 6px; background: var(--ink); color: var(--cream);
  display: inline-flex; align-items: center; justify-content: center;
  font-family: "DM Sans", sans-serif; font-weight: 800; font-size: 11px;
}
.ai101 .post-meta .sep { color: var(--line-strong); }
.ai101 .post-meta .dim { color: var(--ink-3); display: inline-flex; align-items: center; gap: 4px; }

.ai101 .video-wrap { padding: 4px 56px 40px; }
.ai101 .video-frame {
  max-width: 980px; aspect-ratio: 16/9;
  border-radius: var(--r-md); overflow: hidden;
  border: 1.5px solid var(--line-strong);
  background: #1B1714;
}
.ai101 .video-frame iframe { width: 100%; height: 100%; border: 0; display: block; }

.ai101 .article {
  padding: 24px 56px 64px;
  display: grid; grid-template-columns: minmax(0, 720px) 1fr; gap: 64px;
  align-items: flex-start;
}
.ai101 .article-tag-row { display: flex; align-items: center; gap: 12px; margin-bottom: 24px; }
.ai101 .article-tag-row .dim { font-size: 13px; color: var(--ink-3); }
.ai101 aside.sidebar {
  position: sticky; top: 24px;
}
.ai101 .related {
  padding: 32px 56px 72px;
  border-top: 1.5px solid var(--line);
}
.ai101 .related h2 { font-size: 32px; }
.ai101 .related-head { display: flex; align-items: flex-end; justify-content: space-between; margin-top: 24px; margin-bottom: 28px; }

/* 404 / empty */
.ai101 .empty {
  padding: 96px 56px; text-align: center;
}
.ai101 .empty h2 { font-size: 32px; margin-bottom: 12px; }
.ai101 .empty p { color: var(--ink-2); margin-bottom: 24px; }

/* ──────────────────────────────────────────────────────────
   RWD — phone (≤640px) and small tablet (≤960)
   ────────────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .ai101 .nav { padding: 16px 20px; }
  .ai101 .nav .nav-links { display: none; }
  .ai101 .nav .nav-mobile-toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 10px;
    border: 1.5px solid var(--line-strong); background: var(--paper);
  }

  .ai101 .hero { padding: 32px 20px 28px; }
  .ai101 .hero h1 { font-size: 36px; line-height: 1.15; letter-spacing: -0.02em; margin-bottom: 16px; }
  .ai101 .hero p.lead { font-size: 15.5px; margin-bottom: 24px; }
  .ai101 .hero .btn-primary { width: 100%; justify-content: center; }
  .ai101 .hero-cta-row { flex-direction: column; align-items: stretch; gap: 14px; }
  .ai101 .hero-cta-row .meta { text-align: center; font-size: 12.5px; }
  .ai101 .hero-blob-1 { top: -10px; right: -80px; width: 300px; height: 240px; }
  .ai101 .hero-blob-2, .ai101 .hero-sparkle-1, .ai101 .hero-sparkle-2 { display: none; }

  .ai101 .filter-bar { padding: 18px 20px 16px; flex-direction: column; align-items: stretch; gap: 12px; }
  .ai101 .filter-bar .pills { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .ai101 .filter-bar .all-link { display: none; }

  .ai101 .grid { padding: 4px 20px 32px; }
  .ai101 .grid-3 { grid-template-columns: 1fr; gap: 18px; }

  .ai101 .strip { padding: 16px 20px 36px; }
  .ai101 .strip h2 { font-size: 22px; }
  .ai101 .strip-grid { grid-template-columns: 1fr; gap: 14px; }
  .ai101 .strip-card { min-height: auto; padding: 22px; }

  .ai101 .listhead { padding: 28px 20px 18px; }
  .ai101 .listhead h1 { font-size: 34px; letter-spacing: -0.02em; }
  .ai101 .listhead p { font-size: 15px; }
  .ai101 .listhead .pillrow { gap: 8px; margin-top: 20px; overflow-x: auto; flex-wrap: nowrap; }
  .ai101 .listhead .pillrow .count-meta { margin-left: 0; }

  .ai101 .breadcrumb { padding: 18px 20px 0; font-size: 12.5px; }
  .ai101 .detail-header { padding: 20px 20px 18px; }
  .ai101 .detail-header h1 { font-size: 28px; line-height: 1.25; letter-spacing: -0.015em; margin-bottom: 14px; }
  .ai101 .detail-lead { font-size: 15.5px; margin-bottom: 18px; }
  .ai101 .post-meta { font-size: 12.5px; gap: 8px; }
  .ai101 .video-wrap { padding: 4px 20px 28px; }

  .ai101 .article { padding: 8px 20px 40px; grid-template-columns: 1fr; gap: 24px; }
  .ai101 aside.sidebar { position: static; }
  .ai101 .article .prose { font-size: 15.5px; }

  .ai101 .related { padding: 24px 20px 36px; }
  .ai101 .related h2 { font-size: 22px; }
  .ai101 .related-head { flex-direction: column; align-items: flex-start; gap: 8px; margin-bottom: 18px; }
  .ai101 .related .grid-3 { grid-template-columns: 1fr; gap: 18px; }

  .ai101 .empty { padding: 56px 20px; }
  .ai101 .empty h2 { font-size: 24px; }

  .ai101 .site-footer { padding: 32px 20px 28px; }
  .ai101 .site-footer .site-footer-row:first-child { flex-direction: column; align-items: flex-start; }
}

/* small tablet sweet spot */
@media (min-width: 641px) and (max-width: 960px) {
  .ai101 .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .ai101 .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .ai101 .related .grid-3 { grid-template-columns: repeat(2, 1fr); }
}