:root {
  /* Brand tokens: docs/brand-and-tokens-2026-07-24.md (exact hex). */
  --font-heading: "Cormorant Garamond", Georgia, serif;
  --font-body: "DM Sans", "Helvetica Neue", Arial, sans-serif;
  --color-background: #F7F3EB;
  --color-surface: #FFFFFF;
  --color-surface-2: #FBF8F2;
  --color-text: #2A2622;
  --color-text-muted: #5F574E;
  --color-text-faint: #918779;
  --color-accent: #7C2230;
  --color-accent-soft: #F7E6E6;
  --color-rule: #E4DCCE;
  --color-rule-soft: #EFE8DC;
  --chip-cited-bg: #E9EDF2; --chip-cited-text: #33495B; --chip-cited-line: #CCD8E2;
  --chip-computed-bg: #E5EDE4; --chip-computed-text: #2C5138; --chip-computed-line: #C8DAC8;
  --chip-inferred-bg: #F7E6E6; --chip-inferred-text: #7C2230; --chip-inferred-line: #E7C6C6;
  --chip-neutral-text: #6B6259; --chip-neutral-line: #D9D1C4;
  --content-max-width: 48rem;
  --space-1: .25rem; --space-2: .5rem; --space-3: 1rem; --space-4: 2rem; --space-5: 4rem;
}
/* The wordmark: Int in accent, fra in ink, split always after "Int". */
.logo { font-family: var(--font-heading); font-weight: 700; font-size: 30px;
  letter-spacing: -.015em; line-height: 1; color: var(--color-text);
  display: inline-block; }
.logo i { color: var(--color-accent); font-style: normal; }
.logo small { display: block; font-family: var(--font-body); font-weight: 500;
  font-size: 9px; letter-spacing: .15em; text-transform: uppercase;
  color: var(--color-text-faint); margin-top: 6px; }
.logo.lg { font-size: 52px; } .logo.lg small { font-size: 11px; margin-top: 9px; }
.logo.sm { font-size: 19px; } .logo.sm small { font-size: 8px; margin-top: 4px; }
body { font-family: var(--font-body); background: var(--color-background);
  color: var(--color-text); margin: 0; line-height: 1.55; }
h1, h2, h3 { font-family: var(--font-heading); font-weight: 600; margin: 0 0 var(--space-1); }
h1 { font-size: 2.2rem; }
a { color: var(--color-accent); }
.muted { color: var(--color-text-muted); }
.small { font-size: .85rem; }
/* Provenance chips (R1): the three fills below are RESERVED. Anything that is
   not a provenance chip uses .chip-neutral or .chip-sample. Internal class
   names stay cited/computed/inferred; only the visible labels changed. */
.chip { display: inline-block; font-size: 10px; font-weight: 700;
  letter-spacing: .11em; text-transform: uppercase; padding: 3px 8px;
  border-radius: 3px; border: 1px solid transparent; line-height: 1.5;
  vertical-align: middle; }
.chip-cited { background: var(--chip-cited-bg); color: var(--chip-cited-text);
  border-color: var(--chip-cited-line); }
.chip-computed { background: var(--chip-computed-bg); color: var(--chip-computed-text);
  border-color: var(--chip-computed-line); }
.chip-inferred { background: var(--chip-inferred-bg); color: var(--chip-inferred-text);
  border-color: var(--chip-inferred-line); }
.chip-neutral { background: transparent; color: var(--chip-neutral-text);
  border-color: var(--chip-neutral-line); font-weight: 500; }
.chip-sample { background: transparent; color: var(--color-text-faint);
  border: 1px dashed var(--chip-neutral-line); font-weight: 500; }
.legend { font-size: .8rem; color: var(--color-text-faint); line-height: 1.55; }
.legend b { color: var(--color-text-muted); }
/* R2 data floor: the named plain state that replaces a too-thin chart. */
.suppress { background: var(--color-surface-2); border: 1px dashed var(--color-rule);
  border-radius: 8px; padding: var(--space-3); }
.suppress h4 { font-family: var(--font-heading); font-size: 1.15rem;
  font-weight: 600; margin: 0 0 var(--space-1); }
.suppress p { font-size: .88rem; color: var(--color-text-muted); margin: 0 0 var(--space-1); }
.suppress a { font-size: .88rem; font-weight: 500; }
.card { border: 1px solid var(--color-rule); border-radius: 6px;
  padding: var(--space-3); margin-top: var(--space-3); background: white; }
.button { display: inline-block; background: var(--color-accent);
  color: var(--color-background); padding: var(--space-2) var(--space-3);
  border: none; border-radius: 4px; text-decoration: none; font: inherit;
  font-size: .95rem; cursor: pointer; }
.button:disabled { opacity: .5; cursor: wait; }
.button-muted { background: transparent; color: var(--color-accent);
  border: 1px solid var(--color-accent); }
input, textarea { width: 100%; box-sizing: border-box; font: inherit;
  padding: var(--space-2); border: 1px solid var(--color-rule); border-radius: 4px;
  background: white; margin-top: var(--space-1); }
.actions { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-top: var(--space-3); }
.notice { color: var(--color-text-muted); font-size: .85rem; font-style: italic; }
.err { color: var(--color-accent); font-weight: 600; }
details { margin-top: var(--space-2); }
pre { background: white; border: 1px solid var(--color-rule); border-radius: 4px;
  padding: var(--space-2); overflow-x: auto; font-size: .75rem; }
dialog { border: 1px solid var(--color-rule); border-radius: 8px; padding: var(--space-4);
  max-width: 26rem; font-family: var(--font-body); }
dialog::backdrop { background: rgba(0,0,0,.35); }
.spin { display: inline-block; animation: spin 1.2s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Explicit loading states: the tiny inline glyph alone read as a frozen page,
   especially on phones. Long button-driven waits dim the page behind a large
   centred card; auto-computed sections use the louder inline variant. */
#loading-overlay { position: fixed; inset: 0; z-index: 60; display: none;
  align-items: center; justify-content: center;
  background: rgba(42, 38, 34, .45); padding: var(--space-4); }
.loading-card { background: var(--color-surface); border: 1px solid var(--color-rule);
  border-radius: 8px; padding: var(--space-4); max-width: 22rem; width: 100%;
  box-sizing: border-box; text-align: center;
  box-shadow: 0 8px 30px rgba(42, 38, 34, .25); }
.loading-card p { margin: var(--space-2) 0 0; font-size: .95rem; }
.loading-ring { display: inline-block; width: 44px; height: 44px;
  border: 4px solid var(--color-accent-soft); border-top-color: var(--color-accent);
  border-radius: 50%; animation: spin .9s linear infinite; }
.loading-inline { display: flex; align-items: center; gap: var(--space-2);
  background: var(--color-surface-2); border: 1px solid var(--color-rule);
  border-radius: 6px; padding: var(--space-2) var(--space-3); }
.loading-inline .loading-ring { width: 22px; height: 22px; border-width: 3px; flex: none; }
@media (prefers-reduced-motion: reduce) {
  .loading-ring, .spin { animation-duration: 3s; }
}
footer { color: var(--color-text-muted); font-size: .8rem;
  border-top: 1px solid var(--color-rule); margin-top: var(--space-5);
  padding-top: var(--space-3); }

/* ---- app shell: left sidebar + content ---- */
.shell { display: flex; min-height: 100vh; }
aside.side { width: 218px; flex: none; box-sizing: border-box;
  border-right: 1px solid var(--color-rule); padding: var(--space-3);
  display: flex; flex-direction: column; gap: 2px;
  position: sticky; top: 0; height: 100vh; }
.side .logo { margin: 0 0 var(--space-3); }
.navbtn { background: none; border: none; font: inherit; text-align: left;
  cursor: pointer; padding: var(--space-2); border-radius: 4px;
  color: var(--color-text); width: 100%; box-sizing: border-box; }
.navbtn .sub { display: block; font-size: .72rem; color: var(--color-text-muted); }
.navbtn.active { background: white; color: var(--color-accent);
  box-shadow: inset 2px 0 0 var(--color-accent); }
.navbtn:disabled { opacity: .45; cursor: not-allowed; }
.side .divider { border-top: 1px solid var(--color-rule); margin: var(--space-2) 0; }
.side .foot { margin-top: auto; font-size: .78rem; color: var(--color-text-muted);
  overflow-wrap: anywhere; }
.side .tile { border: 1px solid var(--color-rule); border-radius: 6px;
  background: white; padding: var(--space-2); line-height: 1.7; }
.chanrow { display: flex; gap: var(--space-2); align-items: flex-start;
  padding: .45rem 0; border-bottom: 1px dashed var(--color-rule); }
.chanrow .chip { flex: none; margin-top: .15rem; }
main.content { flex: 1; min-width: 0; padding: var(--space-4) var(--space-3) var(--space-5); }
main.content > .inner { max-width: var(--content-max-width); margin: 0 auto; }
.panel { display: none; }
.panel.active { display: block; }
@media (max-width: 800px) {
  .shell { flex-direction: column; }
  aside.side { position: static; width: auto; height: auto; flex-direction: row;
    flex-wrap: wrap; align-items: center; border-right: none;
    border-bottom: 1px solid var(--color-rule); }
  .side .logo { margin: 0 var(--space-2) 0 0; font-size: 19px; }
  .side .logo small { display: none; }
  .navbtn { width: auto; }
  .navbtn .sub { display: none; }
  .side .foot { margin-top: 0; margin-left: auto; }
}

/* ---- gate ---- */
#view-gate { max-width: 34rem; margin: 0 auto; padding: var(--space-5) var(--space-3); }
#view-gate .logo { margin-bottom: var(--space-3); }

/* ---- wizard stages (inside the setup panel) ---- */
.steps { display: flex; gap: var(--space-2); margin: var(--space-3) 0 0;
  border-bottom: 1px solid var(--color-rule); }
.step { background: none; border: none; font: inherit; cursor: pointer; flex: 1;
  color: var(--color-text-muted); padding: var(--space-2); text-align: left;
  border-bottom: 3px solid transparent; }
.step .n { font-family: var(--font-heading); font-size: 1.4rem; display: block; }
.step.active { color: var(--color-accent); border-bottom-color: var(--color-accent); }
.step.done .n::after { content: " ✓"; font-size: 1rem; }
.step.locked { opacity: .4; cursor: not-allowed; }
#step-hint { min-height: 1.2rem; }
.stage { display: none; padding-top: var(--space-3); }
.stage.active { display: block; }
.source-row { display: flex; gap: var(--space-2); align-items: flex-start;
  padding: var(--space-2) 0; border-bottom: 1px solid var(--color-rule); }
.source-row input[type=checkbox] { width: auto; margin-top: .3rem; }
.weightbar { height: 6px; border-radius: 3px; background: var(--color-rule);
  margin-top: .35rem; max-width: 140px; }
.weightbar > div { height: 6px; border-radius: 3px; background: var(--color-accent); }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-3); }
.itemtag { display: flex; justify-content: space-between; gap: var(--space-2);
  padding: .35rem 0; border-bottom: 1px dashed var(--color-rule); font-size: .88rem; }
.brief { border-left: 3px solid var(--color-accent); padding-left: var(--space-3); }
.brief h3 { margin-top: var(--space-3); font-size: 1.1rem; }
.keyfig { font-family: var(--font-heading); font-size: 2.4rem; line-height: 1.1; }