:root {
  --curated-bg: #f3e8ff;
  --curated-text: #6b21a8;
  --curated-edge: #9333ea;
  --bg: #f6f7fb;
  --surface: #ffffff;
  --surface-2: #eef0f6;
  --text: #171a26;
  --muted: #5d6478;
  --border: #dde1ec;
  --accent: #4f46e5;
  --accent-text: #ffffff;
  --accent-soft: rgba(79, 70, 229, 0.12);
  --hl: rgba(79, 70, 229, 0.14);
  --hl-edge: #4f46e5;
  --storage: #0e9f6e;
  --network: #2563eb;
  --warning: #c27803;
  --info: #6b7280;
  --draft-bg: #fff6e0;
  --draft-text: #8a5a00;
  --tested-bg: #def7ec;
  --tested-text: #03543f;
  --retest-bg: #e8edff;
  --retest-text: #3730a3;
  --code-bg: #0f1220;
  --code-text: #d6dcf0;
  --code-muted: #5f6886;
  --t-key: #9fb4ff;
  --t-str: #a7e3b5;
  --t-num: #ffc28a;
  --t-lit: #f59fc7;
  --t-macro: #ffd866;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 4px 16px rgba(16, 24, 40, 0.06);
  --radius: 14px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d0f17;
    --surface: #161a26;
    --surface-2: #1d2231;
    --text: #e8eaf2;
    --muted: #9aa2b8;
    --border: #2a3042;
    --accent: #8b85ff;
    --accent-text: #0d0f17;
    --accent-soft: rgba(139, 133, 255, 0.16);
    --hl: rgba(139, 133, 255, 0.2);
    --hl-edge: #8b85ff;
    --storage: #31c48d;
    --network: #76a9fa;
    --warning: #f6c344;
    --info: #9aa2b8;
    --curated-bg: #3b1a5a;
    --curated-text: #e9d5ff;
    --curated-edge: #c084fc;
    --curated-bg: #3b1a5a;
  --curated-text: #e9d5ff;
  --curated-edge: #c084fc;
  --draft-bg: #3a2c0b;
    --draft-text: #f6d58a;
    --tested-bg: #0f3a2a;
    --tested-text: #84e1bc;
    --retest-bg: #232b55;
    --retest-text: #b4c0ff;
    --code-bg: #0a0c14;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 16px rgba(0, 0, 0, 0.3);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0d0f17;
  --surface: #161a26;
  --surface-2: #1d2231;
  --text: #e8eaf2;
  --muted: #9aa2b8;
  --border: #2a3042;
  --accent: #8b85ff;
  --accent-text: #0d0f17;
  --accent-soft: rgba(139, 133, 255, 0.16);
  --hl: rgba(139, 133, 255, 0.2);
  --hl-edge: #8b85ff;
  --storage: #31c48d;
  --network: #76a9fa;
  --warning: #f6c344;
  --info: #9aa2b8;
  --curated-bg: #3b1a5a;
  --curated-text: #e9d5ff;
  --curated-edge: #c084fc;
  --draft-bg: #3a2c0b;
  --draft-text: #f6d58a;
  --tested-bg: #0f3a2a;
  --tested-text: #84e1bc;
  --retest-bg: #232b55;
  --retest-text: #b4c0ff;
  --code-bg: #0a0c14;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 4px 16px rgba(0, 0, 0, 0.3);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 var(--font);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
a { color: var(--accent); text-underline-offset: 2px; }
h1, h2, h3 { line-height: 1.2; margin: 0; }
img { max-width: 100%; }
.wrap { max-width: 1240px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.lede { color: var(--muted); font-size: 1.1rem; margin: 0.5rem 0 0; max-width: 62ch; }

/* header / footer */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); text-decoration: none; white-space: nowrap; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav .short { display: none; }
.nav a { white-space: nowrap; color: var(--muted); text-decoration: none; padding: 6px 10px; border-radius: 8px; font-size: 0.95rem; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.theme-toggle { border: 0; background: none; color: var(--muted); padding: 8px; border-radius: 8px; cursor: pointer; display: grid; }
.theme-toggle:hover { background: var(--surface-2); color: var(--text); }
.site-footer { border-top: 1px solid var(--border); margin-top: 64px; padding: 24px 0; color: var(--muted); font-size: 0.875rem; }
.site-footer p { margin: 0.25rem 0; }

/* buttons, badges */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  border-radius: 9px; padding: 7px 14px; font: inherit; font-size: 0.9rem; font-weight: 600;
  cursor: pointer; text-decoration: none; border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-primary:hover { filter: brightness(1.08); }
.btn-ghost { color: var(--code-text); border-color: #2c3350; background: transparent; }
.btn-ghost:hover { background: #1b2033; }
.badge, .tag {
  display: inline-block; font-size: 0.75rem; font-weight: 600; padding: 2px 9px; border-radius: 999px; white-space: nowrap;
}
.badge-draft { background: var(--draft-bg); color: var(--draft-text); }
.badge-tested { background: var(--tested-bg); color: var(--tested-text); }
.badge-needs-retest { background: var(--retest-bg); color: var(--retest-text); }
.badge-curated { background: var(--curated-bg); color: var(--curated-text); }
.notice-curated { background: var(--curated-bg); color: var(--curated-text); border-left: 4px solid var(--curated-edge); }
.notice-curated a { color: inherit; font-weight: 600; }
.curated-toggle {
  display: inline-flex; align-items: center; gap: 6px; font: inherit; font-size: 0.88rem; font-weight: 600;
  padding: 6px 12px; border-radius: 10px; cursor: pointer;
  background: var(--surface); color: var(--muted); border: 1px solid var(--border);
}
.curated-toggle span { font-weight: 500; opacity: 0.7; }
.curated-toggle:hover { color: var(--text); }
.curated-toggle[aria-pressed="true"] { background: var(--curated-bg); color: var(--curated-text); border-color: var(--curated-edge); }
.tag { background: var(--surface-2); color: var(--muted); font-weight: 500; text-transform: capitalize; }

/* library */
.hero { padding: 56px 0 24px; text-align: center; }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); letter-spacing: -0.02em; }
.hero .lede { margin: 12px auto 0; }
.search {
  position: relative; max-width: 640px; margin: 28px auto 0;
  display: flex; align-items: center; gap: 10px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 14px;
  padding: 0 14px; box-shadow: var(--shadow); color: var(--muted);
}
.search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font: inherit; font-size: 1.05rem; padding: 15px 0; }
.search kbd { font: 0.75rem var(--mono); border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; }
.hero-links { margin-top: 14px; font-size: 0.95rem; }
.filters { margin: 8px 0 18px; }
.chips { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; }
.chip {
  border: 1px solid var(--border); background: var(--surface); color: var(--muted);
  border-radius: 999px; padding: 4px 12px; font: inherit; font-size: 0.85rem; cursor: pointer; text-transform: capitalize;
}
.chip:hover { color: var(--text); }
.chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.filter-row { display: flex; justify-content: flex-start; align-items: center; margin-top: 16px; gap: 12px; flex-wrap: wrap; }
.segmented { display: inline-flex; flex-wrap: wrap; gap: 4px; background: var(--surface-2); border-radius: 10px; padding: 4px; }
.seg { border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 0.88rem; font-weight: 600; padding: 5px 12px; border-radius: 7px; cursor: pointer; }
.seg span { font-weight: 500; opacity: 0.7; margin-left: 2px; }
.seg:hover { color: var(--text); }
.seg[aria-pressed="true"] { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.seg-tested[aria-pressed="true"] { background: var(--tested-bg); color: var(--tested-text); }
.select { color: var(--muted); font-size: 0.9rem; display: flex; align-items: center; gap: 8px; }
.select select { font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 5px 8px; }
.count { margin: 0 0 0 auto; color: var(--muted); font-size: 0.9rem; }
.grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 12px; }
.card a {
  display: flex; gap: 14px; height: 100%; padding: 16px; text-decoration: none; color: inherit;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}
.card a:hover { border-color: var(--accent); box-shadow: var(--shadow); transform: translateY(-1px); }
.app-icon { width: 48px; height: 48px; border-radius: 12px; object-fit: contain; flex: none; background: #fff; padding: 4px; border: 1px solid var(--border); }
.app-icon-lg { width: 72px; height: 72px; border-radius: 18px; padding: 6px; }
.card-body { min-width: 0; display: flex; flex-direction: column; }
.card h2 { font-size: 1.02rem; }
.card p { margin: 4px 0 10px; color: var(--muted); font-size: 0.88rem; line-height: 1.45; flex: 1; }
.card-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.empty { text-align: center; color: var(--muted); padding: 48px 0; }

/* app page */
.app-page { padding-top: 20px; }
.crumbs { font-size: 0.9rem; color: var(--muted); }
.crumbs a { color: var(--muted); }
.app-head { display: flex; gap: 20px; align-items: flex-start; margin: 18px 0 20px; }
.app-head h1 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); letter-spacing: -0.01em; }
.meta-row, .link-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; font-size: 0.875rem; }
.link-row { gap: 16px; }
.notice { border-radius: 12px; padding: 12px 16px; margin-bottom: 18px; font-size: 0.93rem; border: 1px solid transparent; }
.notice-draft { background: var(--draft-bg); color: var(--draft-text); }
.notice-needs-retest { background: var(--retest-bg); color: var(--retest-text); }
.quick-steps { list-style: none; padding: 0; margin: 0 0 22px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.quick-steps li { display: flex; gap: 10px; align-items: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px; font-size: 0.9rem; }
.quick-steps li > span { flex: none; width: 24px; height: 24px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-weight: 700; font-size: 0.8rem; }

.explainer { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 56px; align-items: start; position: relative; }
.code-col { position: sticky; top: 76px; }
.code-card { background: var(--code-bg); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid #1f2438; }
.code-bar { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 10px 12px 10px 16px; border-bottom: 1px solid #1f2438; }
.code-title { color: var(--code-muted); font: 0.85rem var(--mono); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.code-actions { display: flex; gap: 8px; flex: none; }
.code {
  position: relative; margin: 0; padding: 12px 0; overflow: auto; max-height: calc(100vh - 160px);
  font: 13px/1.65 var(--mono); color: var(--code-text); tab-size: 2;
}
.code code { display: block; min-width: max-content; }
.ln { cursor: pointer; display: flex; padding-right: 16px; border-left: 3px solid transparent; transition: background 0.12s; }
.ln.hl { background: var(--hl); border-left-color: var(--hl-edge); }
.gutter { flex: none; width: 64px; display: flex; justify-content: flex-end; align-items: center; gap: 3px; padding-right: 14px; user-select: none; color: var(--code-muted); }
.num { min-width: 2ch; text-align: right; }
.src { white-space: pre; }
.marker {
  min-width: 18px; height: 18px; padding: 0 4px; border-radius: 9px; display: grid; place-items: center;
  background: #2a3152; color: #cdd5ff; font: 700 10px/1 var(--font); text-decoration: none;
}
.marker:hover, .marker.active { background: var(--hl-edge); color: #fff; }
.t-key { color: var(--t-key); }
.t-str { color: var(--t-str); }
.t-num { color: var(--t-num); }
.t-lit { color: var(--t-lit); }
.t-macro { color: var(--t-macro); font-weight: 600; }

.boxes-title { font-size: 1.15rem; }
.boxes-hint { margin: 4px 0 14px; font-size: 0.875rem; }
.boxes { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.box {
  --tone: var(--info);
  position: relative; display: flex; gap: 12px; padding: 14px 16px;
  background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--tone);
  border-radius: 12px; cursor: pointer; outline: none;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.box::before {
  content: ""; position: absolute; left: -11px; top: 18px;
  border: 7px solid transparent; border-right-color: var(--tone);
}
.box { scroll-margin: 84px 0 24px; }
.box-storage { --tone: var(--storage); }
.box-network { --tone: var(--network); }
.box-warning { --tone: var(--warning); }
.box:hover, .box:focus-visible, .box.active { box-shadow: var(--shadow); border-color: var(--tone); transform: translateX(-2px); }
.box.active { background: color-mix(in srgb, var(--tone) 7%, var(--surface)); }
.box-num { flex: none; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; background: var(--tone); color: #fff; font-weight: 700; font-size: 0.8rem; }
.box h3 { font-size: 0.98rem; margin-top: 2px; }
.box p { margin: 4px 0 0; font-size: 0.9rem; color: var(--muted); }
.box p.box-lines { font: 0.75rem var(--mono); margin-top: 6px; opacity: 0.8; }
.connector { position: fixed; inset: 0; width: 100vw; height: 100vh; pointer-events: none; z-index: 5; overflow: visible; }
.connector path { fill: none; stroke: var(--hl-edge); stroke-width: 2; stroke-dasharray: 5 4; opacity: 0; transition: opacity 0.15s; }
.connector.show path { opacity: 0.9; }

/* guide */
.guide { padding-top: 40px; max-width: 1080px; }
.guide-head h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); letter-spacing: -0.02em; }
.steps { list-style: none; padding: 0; margin: 36px 0 0; display: flex; flex-direction: column; gap: 22px; }
.step { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 28px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; align-items: center; }
.step-num { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--accent); color: var(--accent-text); font-weight: 700; margin-bottom: 10px; }
.step h2 { font-size: 1.25rem; margin-bottom: 6px; }
.step p { margin: 8px 0 0; color: var(--muted); }
.tip { background: var(--accent-soft); border-radius: 10px; padding: 8px 12px; color: var(--text) !important; font-size: 0.92rem; }
.note { background: var(--retest-bg); color: var(--retest-text) !important; border-left: 4px solid var(--network); border-radius: 10px; padding: 8px 12px; font-size: 0.92rem; }
.warn { background: var(--draft-bg); color: var(--draft-text) !important; border-left: 4px solid var(--warning); border-radius: 10px; padding: 8px 12px; font-size: 0.92rem; }
.shot { margin: 0; }
.shot img { display: block; width: 100%; border-radius: 10px; border: 1px solid var(--border); }
.shot-placeholder {
  aspect-ratio: 16 / 10; border-radius: 10px; border: 2px dashed var(--border); background: var(--surface-2);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; text-align: center; padding: 16px; color: var(--muted);
}
.shot-placeholder span { font-weight: 600; }
.shot-placeholder small { max-width: 36ch; }
.shot figcaption { font-size: 0.82rem; color: var(--muted); margin-top: 8px; }
.faq { margin-top: 48px; }
.faq h2 { margin-bottom: 14px; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 14px 18px; margin-bottom: 8px; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { color: var(--muted); margin: 10px 0 0; }
.faq-page { padding-top: 40px; max-width: 820px; }
.faq-list { margin-top: 32px; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; scroll-margin-top: 80px; }
.faq-item h2 { font-size: 1.12rem; }
.faq-item h2 a { color: var(--text); text-decoration: none; }
.faq-item h2 a:hover { text-decoration: underline; }
.faq-item:target { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.faq-item p { margin: 8px 0 0; color: var(--muted); }
.faq-more { margin-top: 28px; color: var(--muted); }
.hero-update { margin-top: 10px; font-size: 0.92rem; }
.hero-update a { color: var(--muted); text-decoration: none; }
.hero-update a:hover { color: var(--text); }
.pill { display: inline-block; background: var(--accent); color: var(--accent-text); font-size: 0.72rem; font-weight: 700; padding: 1px 8px; border-radius: 999px; margin-right: 4px; vertical-align: 1px; }
.updates-page { padding-top: 40px; max-width: 920px; }
.update-list { list-style: none; padding: 0; margin: 32px 0 0; display: flex; flex-direction: column; gap: 16px; }
.update { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 24px; scroll-margin-top: 80px; }
.update:target { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.update-head h2 { font-size: 1.25rem; }
.update-head h2 a { color: var(--text); text-decoration: none; }
.update-head p { margin: 4px 0 0; }
.update-section { margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--border); }
.update-section h3 { font-size: 1rem; }
.update-section > p { margin: 4px 0 10px; font-size: 0.92rem; }
.update-apps { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.update-apps a, .update-apps span {
  display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px 5px 6px; border-radius: 999px;
  background: var(--surface-2); color: var(--text); text-decoration: none; font-size: 0.88rem; font-weight: 500;
}
.update-apps a:hover { background: var(--accent-soft); }
.update-apps img { width: 24px; height: 24px; border-radius: 6px; background: #fff; object-fit: contain; }
.guide-cta { text-align: center; margin-top: 36px; }
.empty-page { text-align: center; padding: 96px 16px; }

@media (max-width: 960px) {
  .explainer { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .chips { flex-wrap: nowrap; overflow-x: auto; justify-content: flex-start; padding-bottom: 6px; scrollbar-width: none; }
  .chip { flex: none; }
  .code-col { position: static; }
  .code { max-height: 60vh; }
  .box::before { display: none; }
  .connector { display: none; }
  .quick-steps { grid-template-columns: 1fr; }
  .step { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 600px) {
  .nav a[href*="github"] { display: none; }
  .brand span { display: none; }
  .nav { gap: 0; }
  .nav .long { display: none; }
  .nav .short { display: inline; }
  .nav a { padding: 6px 7px; font-size: 0.88rem; }
  .app-head { gap: 14px; }
  .app-icon-lg { width: 56px; height: 56px; }
  .search kbd { display: none; }
  .code { font-size: 12px; }
  .gutter { width: 52px; padding-right: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}