/* ===========================================================================
   My Skills — landing + catalog
   Light-only, restrained. Bilingual (EN / 繁中 via [data-lang]),
   responsive, no external assets.
   =========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC",
    "PingFang TC", "Microsoft JhengHei", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", ui-monospace, "JetBrains Mono", Menlo,
    Consolas, "Liberation Mono", monospace;

  /* warm paper neutrals */
  --bg: #f6f5f1;
  --bg-elev: #fdfcf9;
  --bg-soft: #eeece4;
  --border: #e5e2d8;
  --border-strong: #d4cfc2;

  /* warm ink text */
  --text: #26241e;
  --text-soft: #5d594e;
  --text-faint: #918c7e;

  /* single muted ink-blue accent */
  --accent: #435a86;
  --accent-soft: #e8ecf4;
  --accent-ink: #364a72;

  --shadow-sm: 0 1px 2px rgba(38, 36, 30, 0.05);
  --shadow-md: 0 3px 12px rgba(38, 36, 30, 0.07);

  --radius: 12px;
  --radius-sm: 8px;
  --maxw: 1120px;
}

/* dark theme — same restrained palette, dimmed */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17171a; --bg-elev: #1e1e22; --bg-soft: #26262b;
    --border: #31313a; --border-strong: #43434e;
    --text: #ecebe7; --text-soft: #adaaa1; --text-faint: #7d7b72;
    --accent: #8ea5d3; --accent-soft: #23293a; --accent-ink: #aabce0;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  }
}

/* manual override wins over the media query in both directions */
:root[data-theme="light"] {
  --bg: #f6f5f1; --bg-elev: #fdfcf9; --bg-soft: #eeece4;
  --border: #e5e2d8; --border-strong: #d4cfc2;
  --text: #26241e; --text-soft: #5d594e; --text-faint: #918c7e;
  --accent: #435a86; --accent-soft: #e8ecf4; --accent-ink: #364a72;
  --shadow-sm: 0 1px 2px rgba(38,36,30,.05);
  --shadow-md: 0 3px 12px rgba(38,36,30,.07);
}
:root[data-theme="dark"] {
  --bg: #17171a; --bg-elev: #1e1e22; --bg-soft: #26262b;
  --border: #31313a; --border-strong: #43434e;
  --text: #ecebe7; --text-soft: #adaaa1; --text-faint: #7d7b72;
  --accent: #8ea5d3; --accent-soft: #23293a; --accent-ink: #aabce0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,.5);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent-ink); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* --- language visibility toggle ---------------------------------------- */
:root[data-lang="en"] .l-zh { display: none !important; }
:root[data-lang="zh"] .l-en { display: none !important; }

/* utility: monospace metadata thread — the page's quiet signature */
.mono {
  font-family: var(--font-mono);
  letter-spacing: 0;
}

/* ===========================================================================
   Header
   =========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: saturate(120%) blur(8px);
  -webkit-backdrop-filter: saturate(120%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 60px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 650;
  font-size: 1.0rem;
  color: var(--text);
  letter-spacing: -0.005em;
}
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 7px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 15px;
  border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
}
.header-spacer { flex: 1; }

.header-search {
  position: relative;
  flex: 0 1 260px;
  display: flex;
  align-items: center;
}
.header-search input {
  width: 100%;
  padding: 8px 12px 8px 32px;
  font: inherit;
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.header-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.header-search .search-icon {
  position: absolute; left: 11px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint); pointer-events: none;
  width: 15px; height: 15px;
}

.seg {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.seg button {
  border: 0; background: transparent; cursor: pointer;
  font: inherit; font-size: 0.82rem; font-weight: 600;
  color: var(--text-soft);
  padding: 5px 11px; border-radius: 6px;
  line-height: 1; transition: background .15s, color .15s;
}
.seg button[aria-pressed="true"] {
  background: var(--bg-elev);
  color: var(--accent-ink);
  box-shadow: var(--shadow-sm);
}
.icon-btn {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-elev);
  color: var(--text-soft);
  cursor: pointer;
  transition: color .15s, border-color .15s;
}
.icon-btn:hover { color: var(--accent-ink); border-color: var(--border-strong); }
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn .moon { display: none; }
:root[data-theme="dark"] .icon-btn .sun { display: none; }
:root[data-theme="dark"] .icon-btn .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-btn .sun { display: none; }
  :root:not([data-theme="light"]) .icon-btn .moon { display: block; }
}

/* ===========================================================================
   Hero
   =========================================================================== */
.hero { padding: 68px 0 40px; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono);
  font-size: 0.74rem; font-weight: 500; letter-spacing: 0;
  color: var(--text-soft);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  padding: 5px 12px; border-radius: 7px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 auto 16px;
  max-width: 18ch;
  font-weight: 700;
}
.hero .sub {
  font-size: clamp(1rem, 1.9vw, 1.14rem);
  color: var(--text-soft);
  max-width: 60ch; margin: 0 auto 30px;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 0.94rem;
  padding: 10px 18px; border-radius: 9px;
  border: 1px solid transparent; cursor: pointer;
  transition: background .15s, border-color .15s, color .15s;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-ink); }
/* dark accent is light — use ink text on the solid button for AA contrast */
:root[data-theme="dark"] .btn-primary { color: #17171a; }
:root[data-theme="dark"] .btn-primary:hover { color: #17171a; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .btn-primary { color: #17171a; }
  :root:not([data-theme="light"]) .btn-primary:hover { color: #17171a; }
}
.btn-ghost { background: var(--bg-elev); color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-ink); }
.btn svg { width: 16px; height: 16px; }

.stats {
  display: flex; flex-wrap: wrap; gap: 26px 44px; justify-content: center;
  margin-top: 44px;
}
.stat { text-align: center; }
.stat b { display: block; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.01em; color: var(--text); }
.stat span { font-size: 0.8rem; color: var(--text-faint); }

/* copy-install strip */
.install {
  margin: 38px auto 0; max-width: 640px;
  display: flex; align-items: stretch; gap: 0;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--bg-elev); box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.install code {
  flex: 1; font-family: var(--font-mono); font-size: 0.83rem;
  padding: 13px 16px; color: var(--text);
  overflow-x: auto; white-space: nowrap; text-align: left;
  display: flex; align-items: center;
}
.install code::before { content: "$ "; color: var(--text-faint); }
.copy-btn {
  border: 0; border-left: 1px solid var(--border);
  background: var(--bg-soft); color: var(--text-soft);
  padding: 0 16px; cursor: pointer; font: inherit; font-size: 0.82rem; font-weight: 600;
  display: flex; align-items: center; gap: 6px;
  transition: color .15s, background .15s;
}
.copy-btn:hover { color: var(--accent-ink); background: var(--accent-soft); }
.copy-btn svg { width: 15px; height: 15px; }

.hero .sub code {
  font-family: var(--font-mono); font-size: 0.88em;
  background: var(--bg-soft); padding: 1px 5px; border-radius: 4px;
  color: var(--accent-ink);
}

/* ===========================================================================
   Why
   =========================================================================== */
.why { padding: 30px 0 6px; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px; margin-top: 6px;
}
.why-item {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  padding: 16px 18px;
}
.why-item h3 { margin: 0 0 6px; font-size: 0.98rem; font-weight: 700; letter-spacing: -0.005em; }
.why-item p { margin: 0; color: var(--text-soft); font-size: 0.9rem; }

/* ===========================================================================
   Catalog
   =========================================================================== */
.catalog { padding: 34px 0 70px; }
.section-head { text-align: center; margin: 30px 0 26px; }
.section-head h2 { font-size: 1.45rem; font-weight: 700; letter-spacing: -0.01em; margin: 0 0 6px; }
.section-head p { color: var(--text-soft); margin: 0; }
.section-head p code { font-family: var(--font-mono); font-size: 0.85em; background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; color: var(--accent-ink); }

/* category filter chips */
.filters {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin: 0 0 30px;
}
.chip {
  border: 1px solid var(--border); background: var(--bg-elev);
  color: var(--text-soft); cursor: pointer;
  font: inherit; font-size: 0.84rem; font-weight: 600;
  padding: 7px 14px; border-radius: 8px;
  transition: color .15s, border-color .15s, background .15s;
}
.chip:hover { border-color: var(--border-strong); color: var(--text); }
.chip[aria-pressed="true"] {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  color: var(--accent-ink);
}
.chip .count {
  font-weight: 700; opacity: .65; margin-left: 5px; font-size: 0.78em;
}

.cat-group { margin-bottom: 12px; }
.cat-group[hidden] { display: none; }
.cat-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.08rem; font-weight: 700; margin: 32px 0 4px; letter-spacing: -0.005em;
}
.cat-title .dot {
  width: 3px; height: 16px; border-radius: 2px;
  background: var(--accent); flex: none;
}
.cat-blurb { color: var(--text-soft); margin: 0 0 18px; font-size: 0.93rem; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 18px;
}

.card {
  position: relative;
  display: flex; flex-direction: column;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 20px 16px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .18s, border-color .18s;
}
.card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}
.card[hidden] { display: none; }
.card-top { display: flex; align-items: flex-start; gap: 12px; }
.card .emoji {
  font-size: 1.4rem; line-height: 1;
  width: 40px; height: 40px; flex: none;
  display: grid; place-items: center;
  background: var(--bg-soft); border-radius: 9px;
  border: 1px solid var(--border);
}
.card h3 {
  margin: 0; font-size: 1.04rem; font-weight: 700; letter-spacing: -0.005em;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.card h3 .slug {
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 500;
  color: var(--text-faint);
}
.badges { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 5px; }
.badge {
  font-size: 0.68rem; font-weight: 600; letter-spacing: 0.01em;
  padding: 2px 8px; border-radius: 6px;
  background: var(--bg-soft); color: var(--text-soft);
  border: 1px solid var(--border);
}
.badge.lang { color: var(--accent-ink); border-color: color-mix(in srgb, var(--accent) 28%, transparent); background: var(--accent-soft); }
.badge.invoke { color: var(--accent-ink); background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 28%, transparent); }

.card .tagline { margin: 14px 0 0; color: var(--text-soft); font-size: 0.92rem; }

.card details { margin-top: 12px; border-top: 1px solid var(--border); padding-top: 12px; }
.card details summary {
  cursor: pointer; list-style: none;
  font-size: 0.82rem; font-weight: 600; color: var(--accent-ink);
  display: inline-flex; align-items: center; gap: 5px;
}
.card details summary::-webkit-details-marker { display: none; }
.card details summary::after { content: "▾"; font-size: 0.7em; transition: transform .15s; }
.card details[open] summary::after { transform: rotate(180deg); }
.detail-block { margin-top: 12px; }
.detail-block h4 {
  margin: 0 0 5px; font-size: 0.72rem; text-transform: uppercase;
  letter-spacing: 0.06em; color: var(--text-faint);
}
.detail-block p { margin: 0 0 10px; font-size: 0.88rem; color: var(--text-soft); }
.detail-block ul { margin: 0 0 10px; padding-left: 18px; }
.detail-block li { font-size: 0.88rem; color: var(--text-soft); margin-bottom: 3px; }

.card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.tag {
  font-family: var(--font-mono); font-size: 0.7rem;
  color: var(--text-faint); background: var(--bg-soft);
  padding: 2px 8px; border-radius: 5px;
}
.card-foot {
  margin-top: 14px; padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.card-foot a { font-size: 0.82rem; font-weight: 600; display: inline-flex; align-items: center; gap: 5px; }
.card-foot a svg { width: 14px; height: 14px; }

.no-results {
  text-align: center; color: var(--text-soft);
  padding: 50px 0; font-size: 0.98rem;
}
.no-results[hidden] { display: none; }

/* ===========================================================================
   Footer
   =========================================================================== */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 40px 0;
  font-size: 0.9rem; color: var(--text-soft);
}
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 18px; justify-content: space-between; align-items: center; }
.site-footer a { color: var(--text-soft); }
.site-footer a:hover { color: var(--accent-ink); }
.foot-links { display: flex; flex-wrap: wrap; gap: 18px; }

/* ===========================================================================
   Responsive
   =========================================================================== */
@media (max-width: 720px) {
  .header-search { display: none; }
  .site-header .wrap { gap: 8px; }
  .hero { padding: 52px 0 30px; }
  .stats { gap: 22px 34px; }
  .grid { grid-template-columns: 1fr; }
  .seg button { padding: 5px 9px; }
}

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}