/* biosingularity — "Verdict/Ledger" brand: developer-grade white surface, one blue accent,
   mono = fact, de-alarmed RAG verdict colours, a recolourable proof-seal. System fonts only
   (strict-CSP safe: no @font-face, no external URL()). */

:root {
  /* ink */
  --ink: #0B1220;
  --ink-soft: #3A4657;
  --ink-faint: #6B7688;

  /* surfaces */
  --paper: #FFFFFF;
  --surface-1: #F7F8FA;
  --surface-2: #EEF1F5;
  --border: #E3E7ED;
  --border-strong: #C9D0DA;

  /* accent — held back so it means "action" */
  --accent: #1B6FF3;
  --accent-ink: #0B3E8F;
  --accent-wash: #EAF1FE;

  /* RAG verdict colours — deliberately de-alarmed (spruce / ochre / brick) */
  --pass: #127A56;   --pass-wash: #E6F4EE;
  --review: #9A6212; --review-wash: #FBF1DE;
  --reject: #B4322E; --reject-wash: #FBEAE9;

  --mono-ink: #1E2530;
  --focus: #1B6FF3;

  --font-head: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "SFMono-Regular", "Cascadia Code", Menlo, Consolas, "Liberation Mono", monospace;

  --radius: 10px;
  --radius-sm: 7px;
  --maxw: 880px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; border-radius: 3px; }

/* Map the engine's severity keys (red/amber/info/green) onto brand verdict tokens once,
   so every component just reads var(--sev) / var(--sev-wash). */
[data-severity="red"]   { --sev: var(--reject); --sev-wash: var(--reject-wash); }
[data-severity="amber"] { --sev: var(--review); --sev-wash: var(--review-wash); }
[data-severity="green"] { --sev: var(--pass);   --sev-wash: var(--pass-wash); }
[data-severity="info"]  { --sev: var(--accent); --sev-wash: var(--accent-wash); }

.page { max-width: var(--maxw); margin: 0 auto; padding: 0 24px 96px; }

/* -- masthead ---------------------------------------------------------- */
.masthead {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 14px;
  padding: 14px 0;
  margin-bottom: 8px;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 9px; }
.seal { width: 26px; height: 26px; color: var(--accent); flex: none; display: block; }
.wordmark {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1.24rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
  line-height: 1;
}
.wordmark .b { color: var(--accent); }
.masthead-links { margin-left: auto; display: flex; gap: 20px; align-items: center; }
.masthead-links a { color: var(--ink-soft); font-size: 0.9rem; font-weight: 500; }
.masthead-links a.cta { color: var(--accent); }

/* -- hero -------------------------------------------------------------- */
.hero { padding: 40px 0 8px; }
.hero h1 {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: clamp(1.9rem, 4.2vw, 2.7rem);
  letter-spacing: -0.025em;
  line-height: 1.08;
  margin: 0 0 16px;
  max-width: 20ch;
}
.hero .subhead {
  font-size: 1.06rem;
  color: var(--ink-soft);
  max-width: 62ch;
  margin: 0 0 18px;
}
.hero .subhead strong { color: var(--ink); font-weight: 600; }
.audience-strip {
  font-size: 0.86rem;
  color: var(--ink-faint);
  margin: 0 0 26px;
  max-width: 60ch;
}

/* -- verify console (the one demo) ------------------------------------- */
.console { margin: 0; }
.console-label {
  display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap;
  margin-bottom: 8px;
}
.console-label .field-label { margin: 0; }
.console-label .example-tag {
  font-size: 0.78rem; color: var(--ink-faint); font-style: normal;
}
.field-label {
  font-size: 0.74rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-faint); font-weight: 600;
}
.refs, textarea.answer {
  width: 100%; min-height: 132px; resize: vertical;
  padding: 15px 16px;
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  background: var(--paper); color: var(--ink);
  font-family: var(--font-mono); font-size: 0.9rem; line-height: 1.6;
}
.refs:focus, textarea.answer:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }

.actions { display: flex; align-items: center; gap: 14px; margin-top: 14px; flex-wrap: wrap; }
.action-btn {
  font: inherit; font-weight: 600; font-size: 0.95rem;
  color: #fff; background: var(--accent);
  border: none; border-radius: var(--radius-sm);
  padding: 11px 26px; cursor: pointer; transition: background 0.14s ease;
}
.action-btn:hover { background: var(--accent-ink); }
.action-btn:disabled { background: var(--border-strong); cursor: progress; }
.action-btn.wide { width: 100%; }

.trust-line { font-size: 0.86rem; color: var(--ink-faint); margin: 12px 0 0; max-width: 60ch; }
.trust-line strong { color: var(--ink-soft); font-weight: 600; }

.status { font-size: 0.86rem; color: var(--ink-faint); margin-top: 10px; min-height: 1.2em; }
.status[data-kind="busy"] { color: var(--accent); }
.status[data-kind="error"] { color: var(--reject); }
.status[data-kind="done"] { color: var(--ink-soft); }

/* -- advanced (collapsed entity lookup) -------------------------------- */
.advanced { margin-top: 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-1); }
.advanced > summary {
  cursor: pointer; list-style: none; padding: 12px 16px;
  font-size: 0.88rem; color: var(--ink-soft); font-weight: 500;
}
.advanced > summary::-webkit-details-marker { display: none; }
.advanced > summary::before { content: "▸ "; color: var(--ink-faint); }
.advanced[open] > summary::before { content: "▾ "; }
.adv-body { padding: 4px 16px 16px; display: flex; flex-direction: column; gap: 12px; }
.adv-body .line-input, .adv-body select { }
.adv-field { display: none; }
.adv-field.on { display: block; }
.field-row { display: flex; gap: 12px; }
.field-col { flex: 1 1 0; min-width: 0; }

.line-input, select.line-input {
  width: 100%; padding: 11px 14px;
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  background: var(--paper); color: var(--ink);
  font-family: var(--font-mono); font-size: 0.9rem;
}
select.line-input { font-family: var(--font-body); }
.line-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }
.optional { color: var(--ink-faint); font-weight: 400; text-transform: none; letter-spacing: 0; }

/* -- results ----------------------------------------------------------- */
.results { margin-top: 34px; border-top: 1px solid var(--border); padding-top: 28px; }
.result-note {
  font-size: 0.9rem; color: var(--ink-soft);
  background: var(--surface-1); border: 1px solid var(--border);
  border-left: 3px solid var(--accent); border-radius: var(--radius-sm);
  padding: 12px 14px; margin: 0 0 20px;
}

.verdict {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-size: 1.02rem; color: var(--ink); margin: 0 0 8px; font-weight: 500;
}
.verdict-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--sev, var(--ink-faint)); flex: none; }
.summary { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 0.9rem; color: var(--ink-soft); margin: 0 0 6px; }
.summary strong { color: var(--ink); }
.summary-sep { color: var(--ink-faint); }

.sev-badge {
  flex: none; align-self: center;
  font-family: var(--font-mono); font-size: 0.66rem; font-weight: 700; letter-spacing: 0.06em;
  padding: 2px 7px; border-radius: 4px;
  color: var(--sev, var(--ink-soft)); background: var(--sev-wash, var(--surface-2));
}

.count-chip { display: inline-flex; align-items: center; gap: 6px; font-size: 0.85rem; color: var(--ink-soft); }
.count-chip .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--sev, var(--ink-faint)); }
.count-n { font-variant-numeric: tabular-nums; font-weight: 700; }
.count-label { color: var(--ink-faint); }

/* -- verdict / claim cards --------------------------------------------- */
.card {
  background: var(--paper); border: 1px solid var(--border);
  border-left: 3px solid var(--sev, var(--border-strong));
  border-radius: var(--radius); padding: 16px 18px; margin-bottom: 14px;
}
.card-head { display: flex; align-items: baseline; gap: 10px; }
.card-dot { width: 11px; height: 11px; border-radius: 50%; background: var(--sev, var(--ink-faint)); flex: none; transform: translateY(1px); }
.card-title { font-family: var(--font-head); font-size: 1.02rem; font-weight: 600; line-height: 1.35; margin: 0; color: var(--ink); }
.card-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin: 8px 0 0 21px; font-size: 0.86rem; color: var(--ink-soft); }
.doi, .resolved { font-family: var(--font-mono); font-size: 0.82rem; color: var(--mono-ink); }
.verdict-title { font-style: italic; color: var(--ink-soft); }
.meta-sep { color: var(--border-strong); }
.pmid-link { font-family: var(--font-mono); font-size: 0.82rem; }
.card-clean { margin: 10px 0 0 21px; font-size: 0.85rem; color: var(--pass); }

.flags { list-style: none; margin: 12px 0 0 21px; padding: 0; }
.flag { display: flex; gap: 10px; padding: 8px 0; border-top: 1px solid var(--border); font-size: 0.88rem; color: var(--ink-soft); }
.flag-kind {
  flex: none; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.04em; text-transform: uppercase;
  padding: 2px 7px; border-radius: 4px; height: fit-content;
  background: var(--sev-wash, var(--surface-2)); color: var(--sev, var(--ink-soft));
}

.entity-chips { display: flex; flex-direction: column; gap: 10px; margin-bottom: 22px; }
.entity-group { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.entity-kind { font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-faint); width: 68px; flex: none; }
.entity-chip { font-family: var(--font-mono); font-size: 0.82rem; padding: 3px 10px; border-radius: 999px; background: var(--surface-2); color: var(--ink-soft); border: 1px solid var(--border); }
.section-label { font-size: 0.72rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-faint); margin: 0 0 12px; }
.empty { font-size: 0.92rem; color: var(--ink-soft); margin: 0 0 12px; }

.error-box {
  display: flex; flex-direction: column; gap: 4px; padding: 14px 16px;
  border: 1px solid var(--border); border-left: 3px solid var(--reject);
  border-radius: var(--radius-sm); background: var(--reject-wash); color: var(--ink); font-size: 0.9rem;
}
.error-box[data-kind="info"] { border-left-color: var(--accent); background: var(--accent-wash); color: var(--ink-soft); font-size: 0.86rem; }

/* entities-found detail inside a verify result */
.entities-found { margin: 6px 0 18px; }
.entities-found > summary { cursor: pointer; font-size: 0.84rem; color: var(--ink-soft); }

/* -- section scaffolding ----------------------------------------------- */
.section { margin-top: 64px; }
.section-h { font-family: var(--font-head); font-size: 1.42rem; font-weight: 600; letter-spacing: -0.02em; margin: 0 0 6px; }
.section-sub { color: var(--ink-soft); font-size: 0.95rem; max-width: 62ch; margin: 0 0 24px; }
.divider { height: 1px; border: 0; background: repeating-linear-gradient(90deg, var(--border-strong) 0 4px, transparent 4px 8px); margin: 0; }

/* how it works — 3 steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 20px; }
.step { background: var(--surface-1); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.step .n { font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent); font-weight: 700; }
.step h3 { font-size: 0.98rem; margin: 6px 0 6px; }
.step p { font-size: 0.88rem; color: var(--ink-soft); margin: 0; }
.cardinal {
  background: var(--accent-wash); border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
  border-radius: var(--radius); padding: 16px 18px; font-size: 0.95rem; color: var(--ink);
}
.cardinal strong { color: var(--accent-ink); }
.cardinal .more { display: inline-block; margin-top: 8px; font-size: 0.88rem; }

/* what it checks — coverage grid */
.coverage-grid { display: grid; grid-template-columns: 1fr; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.cov-row { display: grid; grid-template-columns: 1fr 1.4fr; gap: 12px; padding: 13px 16px; border-top: 1px solid var(--border); align-items: baseline; }
.cov-row:first-child { border-top: none; }
.cov-row:nth-child(even) { background: var(--surface-1); }
.cov-claim { font-weight: 600; font-size: 0.92rem; }
.cov-src { font-family: var(--font-mono); font-size: 0.82rem; color: var(--mono-ink); }
.honesty { font-size: 0.86rem; color: var(--ink-faint); margin: 14px 0 0; max-width: 66ch; }

/* who it's for — outcome cards */
.use-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.use-card { display: flex; flex-direction: column; gap: 10px; padding: 20px; background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius); }
.use-card .tag { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent); }
.use-card h3 { font-size: 1.02rem; margin: 0; letter-spacing: -0.01em; }
.use-card > p { font-size: 0.88rem; color: var(--ink-soft); margin: 0; }
.use-cta { margin-top: auto; font-size: 0.88rem; font-weight: 600; color: var(--accent); }
.card-reveal { margin-top: 6px; }
.dropzone {
  margin: 10px 0 0; padding: 16px; border: 1.5px dashed var(--border-strong); border-radius: var(--radius);
  background: var(--surface-1); text-align: center; display: flex; flex-direction: column; gap: 3px; align-items: center; color: var(--ink-soft);
  transition: border-color .15s ease, background .15s ease;
}
.dropzone.over { border-color: var(--accent); background: var(--accent-wash); }
.dropzone strong { color: var(--ink); font-weight: 600; font-size: 0.86rem; }
.dropzone span { font-size: 0.76rem; color: var(--ink-faint); }
.dropzone input[type="file"] { display: none; }
.link-btn { background: none; border: none; padding: 2px 0; margin-top: 2px; color: var(--accent); font: inherit; font-size: 0.82rem; cursor: pointer; text-decoration: underline; }

/* -- access ------------------------------------------------------------ */
.access { margin-top: 64px; padding: 28px; background: var(--surface-1); border: 1px solid var(--border-strong); border-radius: 14px; }
.access .section-h { margin-top: 0; }
.access-form { display: flex; flex-direction: column; gap: 12px; max-width: 620px; margin-top: 8px; }
.form-row { display: flex; gap: 12px; flex-wrap: wrap; }
.access-form input[type="email"] { flex: 2 1 240px; }
.access-form select { flex: 1 1 200px; }
.access-form input[type="email"], .access-form select, .access-form textarea {
  font: inherit; font-size: 0.92rem; padding: 10px 12px;
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm); background: var(--paper); color: var(--ink);
}
.access-form textarea { min-height: 70px; resize: vertical; }
.access-form .action-btn { align-self: flex-start; }
.access-extras { margin: 16px 0 0; font-size: 0.86rem; color: var(--ink-faint); }
.mono-chip { font-family: var(--font-mono); font-size: 0.82rem; background: var(--surface-2); border: 1px solid var(--border); border-radius: 5px; padding: 2px 7px; color: var(--mono-ink); }

/* -- footer ------------------------------------------------------------ */
.colophon { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; flex-wrap: wrap; margin-top: 64px; padding-top: 20px; border-top: 1px solid var(--border); font-size: 0.8rem; color: var(--ink-faint); }
.sources { display: flex; flex-direction: column; gap: 6px; max-width: 60ch; }
.sources .src-keys { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-soft); line-height: 1.7; }
.doclinks { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.doclinks a { color: var(--accent); }
.foot-plain { color: var(--ink-faint); }

.hidden { display: none !important; }

/* -- responsive -------------------------------------------------------- */
@media (max-width: 760px) {
  .steps { grid-template-columns: 1fr; }
  .use-cards { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .page { padding: 0 16px 72px; }
  .hero { padding: 28px 0 4px; }
  .field-row { flex-direction: column; }
  .cov-row { grid-template-columns: 1fr; gap: 3px; }
  .masthead-links { gap: 14px; }
  .action-btn { width: 100%; }
}