/* Werkbits Explorer. Tokens follow the Werkbits UI design spec v1.0 (system fonts, slate + blue,
   teal = source, violet = target). Layout: sticky contract bar, compact hero, explorer, reference sections. */
:root {
  color-scheme: light;
  --wb-brand-primary: #1a2332;
  --wb-accent: #2563eb;
  --wb-accent-hover: #1d4ed8;
  --wb-accent-subtle: #dbeafe;
  --wb-base: #ffffff;
  --wb-raised: #f8fafc;
  --wb-sunken: #f1f5f9;
  --wb-border: #e2e8f0;
  --wb-border-strong: #cbd5e1;
  --wb-text: #0f172a;
  --wb-text-2: #475569;
  --wb-text-3: #64748b;
  --wb-low: #15803d;
  --wb-low-bg: #dcfce7;
  --wb-med: #a16207;
  --wb-med-bg: #fef9c3;
  --wb-high: #dc2626;
  --wb-high-bg: #fee2e2;
  --wb-score-high: #2563eb;
  --wb-score-mid: #7c3aed;
  --wb-score-low: #94a3b8;
  --wb-source: #0f766e;
  --wb-source-bg: #ccfbf1;
  --wb-target: #7c3aed;
  --wb-target-bg: #ede9fe;
  --wb-arrow: #64748b;
  --wb-focus: #2563eb;
  --wb-shadow: 0 10px 15px -3px rgb(15 23 42 / 0.12);
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 12px;
  --font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --wb-brand-primary: #e2e8f0; --wb-accent: #60a5fa; --wb-accent-hover: #93c5fd; --wb-accent-subtle: #1e3a5f;
    --wb-base: #0f172a; --wb-raised: #1e293b; --wb-sunken: #0c1322; --wb-border: #334155; --wb-border-strong: #475569;
    --wb-text: #f1f5f9; --wb-text-2: #a3b1c6; --wb-text-3: #8191a8;
    --wb-low: #4ade80; --wb-low-bg: #14532d; --wb-med: #facc15; --wb-med-bg: #422006; --wb-high: #f87171; --wb-high-bg: #450a0a;
    --wb-score-high: #60a5fa; --wb-score-mid: #a78bfa; --wb-score-low: #64748b;
    --wb-source: #2dd4bf; --wb-source-bg: #134e4a; --wb-target: #a78bfa; --wb-target-bg: #2e1065; --wb-arrow: #94a3b8;
    --wb-focus: #60a5fa; --wb-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.45);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --wb-brand-primary: #e2e8f0; --wb-accent: #60a5fa; --wb-accent-hover: #93c5fd; --wb-accent-subtle: #1e3a5f;
  --wb-base: #0f172a; --wb-raised: #1e293b; --wb-sunken: #0c1322; --wb-border: #334155; --wb-border-strong: #475569;
  --wb-text: #f1f5f9; --wb-text-2: #a3b1c6; --wb-text-3: #8191a8;
  --wb-low: #4ade80; --wb-low-bg: #14532d; --wb-med: #facc15; --wb-med-bg: #422006; --wb-high: #f87171; --wb-high-bg: #450a0a;
  --wb-score-high: #60a5fa; --wb-score-mid: #a78bfa; --wb-score-low: #64748b;
  --wb-source: #2dd4bf; --wb-source-bg: #134e4a; --wb-target: #a78bfa; --wb-target-bg: #2e1065; --wb-arrow: #94a3b8;
  --wb-focus: #60a5fa; --wb-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.45);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-padding-top: 96px; }
body { margin: 0; background: var(--wb-base); color: var(--wb-text); font: 16px/1.5 var(--font); -webkit-text-size-adjust: 100%; }
a { color: var(--wb-accent); }
a:hover { color: var(--wb-accent-hover); }
:focus-visible { outline: 2px solid var(--wb-focus); outline-offset: 2px; }
h1, h2, h3 { text-wrap: balance; color: var(--wb-text); }
h2 { font-size: 1.25rem; margin: 0 0 8px; }
h3 { font-size: 1rem; margin: 0 0 8px; }
p { margin: 0 0 12px; }
code, .mono, pre { font-family: var(--mono); }
.mono { font-variant-numeric: tabular-nums; }
.wrap { max-width: 1280px; margin: 0 auto; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--wb-base); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 16px; }

/* Top bar and contract banner */
.topbar { border-bottom: 1px solid var(--wb-border); background: var(--wb-base); }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; flex-wrap: wrap; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-family: var(--mono); font-weight: 700; font-size: 1.125rem; color: var(--wb-brand-primary); text-decoration: none; letter-spacing: -0.02em; }
.wm-mark { width: 18px; height: 18px; display: inline-grid; grid-template-columns: 1fr 1fr; gap: 2px; }
.wm-mark::before, .wm-mark::after { content: ""; background: var(--wb-source); border-radius: 2px; }
.wm-mark::after { background: var(--wb-target); }
.topbar nav { display: flex; gap: 20px; flex-wrap: wrap; font-size: 0.875rem; }
.topbar nav a { color: var(--wb-text-2); text-decoration: none; }
.topbar nav a:hover { color: var(--wb-text); }

.contract { position: sticky; top: 0; z-index: 40; background: var(--wb-raised); border-bottom: 1px solid var(--wb-border); }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 50; background: var(--wb-raised); }
.contract { top: env(safe-area-inset-top, 0px); }
.contract-toggle { width: 100%; display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; padding: 8px 0; background: none; border: 0; color: var(--wb-text-2); font: 12px/1.4 var(--font); text-align: left; cursor: pointer; }
.contract-toggle b { color: var(--wb-text); font-weight: 600; }
.contract-toggle .sep { color: var(--wb-border-strong); }
.chev { margin-left: auto; width: 8px; height: 8px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg); transition: transform 0.15s; }
.contract-toggle[aria-expanded="true"] .chev { transform: rotate(-135deg); }
.contract-body { padding: 4px 0 12px; font-size: 0.8125rem; color: var(--wb-text-2); }
.contract-body p.mono { margin: 0 0 4px; overflow-wrap: anywhere; }

/* Hero */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 32px; padding-block: 40px 32px; align-items: start; }
.eyebrow { font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--wb-source); font-weight: 600; margin-bottom: 8px; }
.hero h1 { font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.25rem); line-height: 1.2; margin: 0 0 12px; max-width: 24ch; letter-spacing: -0.015em; }
.lede { color: var(--wb-text-2); max-width: 62ch; margin: 0; }
.hero-card { border: 1px solid var(--wb-border); border-radius: var(--r-lg); padding: 20px; background: var(--wb-raised); font-size: 0.875rem; color: var(--wb-text-2); }
.card-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--wb-text-3); font-weight: 600; margin-bottom: 6px; }
.copy-row { display: flex; gap: 8px; align-items: center; margin: 4px 0 12px; min-width: 0; }
.copy-row code { flex: 1; font-size: 0.75rem !important; min-width: 0; overflow-wrap: anywhere; background: var(--wb-sunken); border: 1px solid var(--wb-border); border-radius: var(--r-sm); padding: 6px 8px; font-size: 0.8125rem; color: var(--wb-text); }
.link { font-size: 0.875rem; }

/* Buttons */
.btn { font: 600 0.8125rem/1 var(--font); border-radius: var(--r-md); padding: 8px 12px; cursor: pointer; border: 1px solid transparent; white-space: nowrap; min-height: 36px; }
.btn-primary { background: var(--wb-accent); color: #fff; }
.btn-primary:hover { background: var(--wb-accent-hover); }
.btn-quiet { background: var(--wb-base); color: var(--wb-text); border-color: var(--wb-border-strong); }
.btn-quiet:hover { border-color: var(--wb-accent); color: var(--wb-accent); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-link { background: none; border: 0; color: var(--wb-accent); font: 600 0.8125rem var(--font); cursor: pointer; padding: 6px 0; min-height: 32px; }
.btn-link:hover { text-decoration: underline; }

/* Explorer */
.explorer { padding-block: 8px 48px; }
.status { margin-bottom: 16px; padding: 10px 14px; border-radius: var(--r-md); background: var(--wb-accent-subtle); color: var(--wb-text); font-size: 0.875rem; display: flex; gap: 10px; align-items: center; }
.status.error { background: var(--wb-high-bg); }
.status .spin { width: 14px; height: 14px; border: 2px solid var(--wb-border-strong); border-top-color: var(--wb-accent); border-radius: 50%; animation: spin 0.7s linear infinite; flex: none; }
@keyframes spin { to { transform: rotate(360deg); } }

.pickers { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); gap: 16px; align-items: stretch; margin-bottom: 20px; }
.picker { border-left: 4px solid var(--wb-source); background: var(--wb-source-bg); border-radius: var(--r-md); padding: 12px 14px; min-width: 0; transition: opacity 0.2s; }
.picker-target { border-left-color: var(--wb-target); background: var(--wb-target-bg); }
.picker-label { display: block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.08em; font-weight: 700; color: var(--wb-source); margin-bottom: 6px; }
.picker-target .picker-label { color: var(--wb-target); }
.picker-meta { font-size: 0.75rem; color: var(--wb-text-2); margin: 6px 0 0; min-height: 1.2em; overflow-wrap: anywhere; }
.combo { position: relative; }
.combo input { width: 100%; font: 600 1rem var(--font); color: var(--wb-text); background: var(--wb-base); border: 1px solid var(--wb-border-strong); border-radius: var(--r-md); padding: 10px 12px; min-height: 44px; }
.combo input:focus { border-color: var(--wb-accent); outline: none; box-shadow: 0 0 0 3px var(--wb-accent-subtle); }
.combo-list { position: absolute; z-index: 30; left: 0; right: 0; top: calc(100% + 4px); margin: 0; padding: 4px; list-style: none; background: var(--wb-base); border: 1px solid var(--wb-border-strong); border-radius: var(--r-md); box-shadow: var(--wb-shadow); max-height: 320px; overflow-y: auto; }
.combo-list li { padding: 8px 10px; border-radius: var(--r-sm); cursor: pointer; display: flex; justify-content: space-between; gap: 12px; font-size: 0.875rem; }
.combo-list li .code { font-family: var(--mono); font-size: 0.75rem; color: var(--wb-text-3); white-space: nowrap; }
.combo-list li[aria-selected="true"], .combo-list li:hover { background: var(--wb-accent-subtle); }
.combo-list li.empty { cursor: default; color: var(--wb-text-3); }
.combo-list li.empty:hover { background: none; }
.dir { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; }
.dir-arrow { font-size: 1.75rem; color: var(--wb-arrow); line-height: 1; transition: transform 0.2s; }
.dir.flip .dir-arrow { transform: rotate(180deg); }
.swapping .picker { opacity: 0.4; }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--wb-border); margin-bottom: 20px; overflow-x: auto; }
.tabs [role="tab"] { font: 600 0.875rem var(--font); color: var(--wb-text-2); background: none; border: 0; border-bottom: 2px solid transparent; margin-bottom: -1px; padding: 10px 14px; cursor: pointer; white-space: nowrap; min-height: 44px; }
.tabs [role="tab"]:hover { color: var(--wb-text); }
.tabs [role="tab"][aria-selected="true"] { color: var(--wb-accent); border-bottom-color: var(--wb-accent); }
.panel { min-height: 240px; }
.placeholder { color: var(--wb-text-3); padding: 32px 0; font-size: 0.9375rem; }

/* Summary scores */
.summary { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-bottom: 12px; }
.score { border: 1px solid var(--wb-border); border-radius: var(--r-md); padding: 14px 16px; background: var(--wb-raised); min-width: 0; }
.score-label { font-size: 0.8125rem; color: var(--wb-text-2); }
.score-value { font: 700 1.875rem/1.2 var(--mono); font-variant-numeric: tabular-nums; margin: 2px 0 8px; color: var(--wb-text); }
.score-note { font-size: 0.75rem; color: var(--wb-text-3); margin-top: 6px; }
.bar { height: 8px; border-radius: 99px; background: var(--wb-sunken); overflow: hidden; }
.bar > i { display: block; height: 100%; border-radius: 99px; background: var(--wb-score-high); }
.bar > i.mid { background: var(--wb-score-mid); }
.bar > i.low { background: var(--wb-score-low); }
.bar > i.gap { background: var(--wb-high); }
.bar > i.imp { background: var(--wb-accent); }
.bar.thin { height: 6px; }
.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 99px; font-size: 0.75rem; font-weight: 700; text-transform: capitalize; }
.badge.low { background: var(--wb-low-bg); color: var(--wb-low); }
.badge.medium { background: var(--wb-med-bg); color: var(--wb-med); }
.badge.high { background: var(--wb-high-bg); color: var(--wb-high); }
.badge.none { background: var(--wb-sunken); color: var(--wb-text-2); }
.score .badge { font-size: 1rem; padding: 6px 14px; margin: 6px 0 4px; }

.reco { border-left: 3px solid var(--wb-border-strong); padding: 4px 0 4px 12px; color: var(--wb-text-2); margin: 16px 0; max-width: 80ch; }
.breakdown { border: 1px solid var(--wb-border); border-radius: var(--r-md); margin-bottom: 20px; }
.breakdown summary { cursor: pointer; padding: 10px 14px; font-size: 0.875rem; font-weight: 600; }
.breakdown .math { padding: 0 14px 12px; font-family: var(--mono); font-size: 0.8125rem; color: var(--wb-text-2); display: grid; gap: 4px; overflow-x: auto; }
.breakdown .math span b { color: var(--wb-text); }
.notice { background: var(--wb-med-bg); color: var(--wb-text); border-radius: var(--r-md); padding: 12px 14px; margin-bottom: 16px; font-size: 0.9375rem; }

.subhead { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; margin: 24px 0 10px; }
.subhead h3 { margin: 0; }
.subhead .count { font-size: 0.8125rem; color: var(--wb-text-3); }

/* Tables */
.table-wrap { position: relative; overflow-x: auto; border: 1px solid var(--wb-border); border-radius: var(--r-md); }
table { width: 100%; border-collapse: collapse; font-size: 0.875rem; }
th { text-align: left; font-size: 0.75rem; font-weight: 600; color: var(--wb-text-3); text-transform: uppercase; letter-spacing: 0.05em; padding: 8px 12px; border-bottom: 1px solid var(--wb-border); background: var(--wb-raised); white-space: nowrap; }
td { padding: 10px 12px; border-bottom: 1px solid var(--wb-border); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--wb-raised); }
td.num, th.num { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
td .sub { display: block; font-family: var(--mono); font-size: 0.75rem; color: var(--wb-text-3); }
td.barcell { width: 140px; min-width: 100px; }
.rank { color: var(--wb-text-3); font-family: var(--mono); width: 2.5em; }
.type { font-size: 0.75rem; color: var(--wb-text-3); white-space: nowrap; }

.filters { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; margin-bottom: 12px; font-size: 0.875rem; }
.filters .group { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.toggle { font: 600 0.8125rem var(--font); border: 1px solid var(--wb-border-strong); background: var(--wb-base); color: var(--wb-text-2); border-radius: 99px; padding: 6px 12px; cursor: pointer; min-height: 32px; }
.toggle[aria-pressed="true"].low { background: var(--wb-low-bg); color: var(--wb-low); border-color: transparent; }
.toggle[aria-pressed="true"].medium { background: var(--wb-med-bg); color: var(--wb-med); border-color: transparent; }
.toggle[aria-pressed="true"].high { background: var(--wb-high-bg); color: var(--wb-high); border-color: transparent; }
.filters select { font: 0.875rem var(--font); padding: 6px 8px; border-radius: var(--r-md); border: 1px solid var(--wb-border-strong); background: var(--wb-base); color: var(--wb-text); min-height: 32px; }
.more { margin-top: 12px; }

.chips { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 16px; padding: 0; list-style: none; }
.chips li { font-size: 0.8125rem; background: var(--wb-sunken); border-radius: var(--r-sm); padding: 4px 8px; color: var(--wb-text-2); }
.activities { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.activities li { display: flex; gap: 8px; align-items: flex-start; font-size: 0.875rem; padding: 8px 12px; background: var(--wb-raised); border-radius: var(--r-md); }
.activities li::before { content: "✓"; color: var(--wb-low); font-weight: 700; }
.profile-head p { max-width: 80ch; color: var(--wb-text-2); }
.check { display: inline-flex; gap: 6px; align-items: center; font-size: 0.875rem; color: var(--wb-text-2); }

/* Reference sections */
.connect, .method { padding-block: 40px; border-top: 1px solid var(--wb-border); }
.section-lede { color: var(--wb-text-2); max-width: 70ch; }
.connect-grid, .method-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 16px; }
.step, .method-grid > div { min-width: 0; font-size: 0.9375rem; color: var(--wb-text-2); }
.hint { font-size: 0.8125rem; color: var(--wb-text-3); }
.code-wrap { overflow-x: auto; background: var(--wb-sunken); border: 1px solid var(--wb-border); border-radius: var(--r-md); margin-bottom: 8px; }
.code { margin: 0; padding: 12px; font-size: 0.75rem; line-height: 1.5; color: var(--wb-text); white-space: pre; }
.tools, .fields { margin: 0; font-size: 0.875rem; }
.tools dt, .fields dt { font-family: var(--mono); font-weight: 600; color: var(--wb-text); margin-top: 8px; }
.tools dd, .fields dd { margin: 2px 0 0; }
.attribution { font-size: 0.8125rem; }
.mods summary { cursor: pointer; font-size: 0.875rem; font-weight: 600; color: var(--wb-text); }
.mods ul { font-size: 0.8125rem; padding-left: 18px; }

.foot { border-top: 1px solid var(--wb-border); background: var(--wb-raised); font-size: 0.8125rem; color: var(--wb-text-2); }
.foot-inner { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding-block: 16px calc(16px + env(safe-area-inset-bottom, 0px)); }

@media (max-width: 1023px) {
  .hero { grid-template-columns: 1fr; }
  .connect-grid, .method-grid { grid-template-columns: 1fr; }
  .pickers { grid-template-columns: 1fr; }
  .dir { flex-direction: row; }
  .dir-arrow { transform: rotate(90deg); }
  .dir.flip .dir-arrow { transform: rotate(270deg); }
}
@media (max-width: 767px) {
  .summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hide-sm { display: none; }
  .score-value { font-size: 1.5rem; }
  td.barcell { min-width: 80px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}