/* Covenant: design tokens and components, from the Claude Design "modernist" system. */
@import url('https://fonts.googleapis.com/css2?family=Archivo:wght@400;600;800&display=swap');

:root {
  --bg: #f3f2f2; --surface: #eae9e9; --text: #201e1d;
  --accent: #ec3013; --accent-100: #fff2ef; --accent-600: #dd2b0f; --accent-700: #ae1800;
  --n200: #eae7e7; --n500: #9b9797; --n600: #7d7979; --n700: #605d5d; --n800: #444141;
  --divider: color-mix(in srgb, #201e1d 40%, transparent);
  --heading: "Archivo", system-ui, sans-serif;
  --bandA: oklch(0.55 0.13 150); --bandB: oklch(0.64 0.13 122);
  --bandC: oklch(0.72 0.14 85); --bandD: oklch(0.62 0.17 50); --bandE: var(--accent);
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font-family: var(--heading); font-size: 15px; line-height: 1.55; }
h1, h2, h3 { font-weight: 800; line-height: 1.12; letter-spacing: -0.015em; margin: 0; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-600); }
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); }
.tnum { font-variant-numeric: tabular-nums; }
.muted { color: var(--n700); }
.kicker { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; }
.label { font-size: 11px; letter-spacing: 0.07em; text-transform: uppercase; color: var(--n700); }
.hr { height: 2px; border: 0; margin: 16px 0; background: var(--divider); }
.hr-heavy { height: 4px; background: var(--text); margin: 0 0 18px; border: 0; }

/* layout */
.page { min-height: 100vh; display: flex; flex-direction: column; }
.shell { max-width: 1240px; width: 100%; margin: 0 auto; padding: 0 32px; }
main.shell { padding: 32px 32px 48px; flex: 1; }

/* header */
header { border-top: 6px solid var(--text); border-bottom: 2px solid var(--divider); }
header .shell { display: flex; align-items: flex-end; justify-content: space-between;
  gap: 24px; flex-wrap: wrap; padding-top: 18px; padding-bottom: 14px; }
.brand { font-weight: 800; font-size: 27px; letter-spacing: 0.04em;
  text-transform: uppercase; line-height: 1; color: inherit; text-decoration: none; display: block; }
.brand-sub { font-size: 10.5px; letter-spacing: 0.09em; text-transform: uppercase;
  color: var(--n600); margin-top: 6px; }
nav.crumbs { display: flex; gap: 22px; font-size: 12px; letter-spacing: 0.06em;
  text-transform: uppercase; font-weight: 600; padding-bottom: 2px; }
nav.crumbs a { color: inherit; text-decoration: none; padding-bottom: 4px; }
nav.crumbs a[aria-current="page"] { border-bottom: 2px solid var(--accent); }
nav.crumbs a .num { color: var(--accent); }
nav.crumbs a.dim { color: var(--n600); }

/* provenance badges */
.prov { margin-top: 10px; display: flex; gap: 10px; align-items: center; flex-wrap: wrap;
  font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--n700); }
.badge { display: inline-flex; align-items: center; gap: 6px; padding: 3px 10px;
  font-weight: 600; border: 1px solid var(--accent); color: var(--accent-700); }
.badge .dot { width: 7px; height: 7px; background: var(--accent); display: inline-block; }
.badge.snap { border-color: var(--n500); color: var(--n800); }
.badge.snap .dot { background: none; border: 1.5px solid var(--n700); }

/* forms + buttons */
.field label { display: block; font-size: 12px; margin-bottom: 5px; color: var(--n700);
  letter-spacing: 0.08em; text-transform: uppercase; }
.input { width: 100%; min-height: 44px; padding: 6px 12px; font: inherit; font-size: 16px;
  color: var(--text); caret-color: var(--accent); background: var(--bg);
  border: 1px solid var(--divider); border-radius: 0; }
.input:hover { border-color: color-mix(in srgb, var(--text) 45%, transparent); }
.input:focus-visible { border-color: var(--accent); outline-offset: 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  cursor: pointer; text-decoration: none; font-family: var(--heading); font-weight: 800;
  font-size: 14px; color: var(--text); background: transparent;
  border: 1px solid transparent; padding: 8px 22px; border-radius: 0; min-height: 44px; }
.btn-primary { background: var(--accent); color: var(--bg); }
.btn-primary:hover { background: var(--accent-600); color: var(--bg); }
.btn-secondary { border-color: var(--divider); }
.btn-secondary:hover { background: color-mix(in srgb, var(--text) 7%, transparent); }

/* tables */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { text-align: left; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--n600); padding: 8px; border-bottom: 2px solid var(--divider); font-weight: 600; }
.table td { padding: 8px; border-bottom: 1px solid var(--divider); }
.table tbody tr:hover { background: color-mix(in srgb, var(--text) 4%, transparent); }
.table tr.hl { background: var(--accent-100); }
.table tr.dead { color: var(--n600); }

/* tags + band chips */
.tag { display: inline-flex; align-items: center; font-size: 10px; letter-spacing: 0.05em;
  padding: 2px 8px; text-transform: uppercase; }
.tag-outline { border: 1px solid var(--accent); color: var(--accent); }
.tag-neutral { background: #f8f4f4; color: var(--n800); }
.chip { display: inline-block; color: var(--bg); font-family: var(--heading);
  font-weight: 800; padding: 1px 9px; }
.chip.bA { background: var(--bandA); } .chip.bB { background: var(--bandB); }
.chip.bC { background: var(--bandC); color: var(--text); }
.chip.bD { background: var(--bandD); } .chip.bE { background: var(--bandE); }

/* register facts grid */
.facts { display: grid; grid-template-columns: 190px 1fr; font-size: 13.5px;
  border-top: 1px solid var(--divider); margin-top: 14px; }
.facts > div { padding: 7px 0; border-bottom: 1px solid var(--divider); }
.facts .label { align-self: center; }

/* band scale (the signature) */
.scale { display: flex; flex-direction: column; gap: 3px; }
.scale .srow { display: grid; grid-template-columns: 1fr 64px; gap: 6px;
  align-items: center; position: relative; }
.scale .sbar { color: var(--bg); font-family: var(--heading); font-weight: 800;
  font-size: 14px; padding: 4px 8px; }
.scale .srange { font-size: 10.5px; color: var(--n600); }
.scale .hit .sbar { outline: 2px solid var(--text); outline-offset: 1px; }
.scale .marker { position: absolute; right: 70px; top: 50%; transform: translateY(-50%);
  background: var(--text); color: var(--bg); font-family: var(--heading); font-weight: 800;
  font-size: 13px; padding: 3px 9px; white-space: nowrap; }

/* certificate layout */
.cert-grid { display: grid; grid-template-columns: 1fr 360px; gap: 40px;
  margin-top: 26px; align-items: start; }
@media (max-width: 900px) { .cert-grid { grid-template-columns: 1fr; } }
aside.bandbox { border: 2px solid var(--text); padding: 20px 20px 18px; background: var(--bg); }
.bigband { font-family: var(--heading); font-weight: 800; font-size: 64px; line-height: 1; }
.sechead { font-size: 15px; letter-spacing: 0.08em; text-transform: uppercase;
  margin: 30px 0 4px; font-weight: 800; }
.actions { display: flex; flex-direction: column; gap: 10px; font-size: 14px; max-width: 680px; }
.actions > div { display: grid; grid-template-columns: 24px 1fr; gap: 8px; }
.actions .arrow { color: var(--accent); font-weight: 800; }

/* compare table */
.cmp { display: grid; grid-template-columns: 220px 1fr 1fr; font-size: 13.5px;
  border-top: 2px solid var(--divider); margin-top: 16px; }
.cmp > div { padding: 9px 12px; border-bottom: 1px solid var(--divider); }
.cmp > .rowlab { padding-left: 0; }
.cmp > div:nth-child(3n+2), .cmp > div:nth-child(3n) { border-left: 1px solid var(--divider); }

/* sweep */
.dist { display: flex; height: 40px; font-family: var(--heading); font-weight: 800;
  font-size: 13px; }
.dist > div { display: flex; align-items: center; padding: 0 10px; gap: 8px;
  overflow: hidden; white-space: nowrap; }
.dist .n { font-weight: 400; font-size: 12px; }
.sweep-grid { display: grid; grid-template-columns: 1fr 360px; gap: 40px;
  margin-top: 36px; align-items: start; }
@media (max-width: 900px) { .sweep-grid { grid-template-columns: 1fr; } }
.minibar { height: 12px; background: var(--n200); position: relative; }
.minibar > div { position: absolute; inset: 0; right: auto; }

/* appendix cards */
.edge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
  margin-top: 28px; align-items: start; }
@media (max-width: 900px) { .edge-grid { grid-template-columns: 1fr; } }
.edge { border-top: 4px solid var(--text); padding-top: 14px; }
.edge .card { border: 1px solid var(--divider); padding: 16px; background: var(--surface); }

/* note strip */
.note { margin-top: 28px; border-top: 1px solid var(--divider); border-bottom: 1px solid var(--divider);
  padding: 16px 0; display: grid; grid-template-columns: auto 1fr; gap: 16px;
  align-items: baseline; max-width: 900px; }

footer { border-top: 2px solid var(--divider); }
footer .shell { padding-top: 14px; padding-bottom: 14px; display: flex;
  justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: baseline;
  font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--n600); }
footer .quote { font-size: 13px; font-weight: 600; text-transform: none;
  letter-spacing: 0; color: var(--text); }

details.method { margin-top: 40px; border-top: 2px solid var(--divider);
  border-bottom: 2px solid var(--divider); }
details.method summary { cursor: pointer; padding: 14px 0; font-family: var(--heading);
  font-weight: 800; font-size: 15px; letter-spacing: 0.08em; text-transform: uppercase;
  list-style: none; display: flex; justify-content: space-between; align-items: center; }
details.method summary::-webkit-details-marker { display: none; }
.method-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; padding: 4px 0 22px; }
@media (max-width: 900px) { .method-grid { grid-template-columns: 1fr; } }
.ded { color: var(--accent-700); font-weight: 600; text-align: right; }

@media print { .no-print { display: none !important; } body { background: #fff; } }

/* ---------- dark theme ----------
   Opt-in via :root[data-theme="dark"], set by the toggle in the header and
   remembered in localStorage. Light stays the default so print and the
   certificate layout are unchanged. */
:root[data-theme="dark"] {
  --bg: #131418; --surface: #1b1d23; --text: #edebe5;
  --accent: #ff5a38; --accent-100: #2a1a16; --accent-600: #ff7355; --accent-700: #ff8b70;
  --n200: #2b2d34; --n500: #7e7c78; --n600: #918f8a; --n700: #a8a6a0; --n800: #c9c7c1;
  --divider: color-mix(in srgb, #edebe5 34%, transparent);
  --bandA: oklch(0.72 0.15 150); --bandB: oklch(0.78 0.15 122);
  --bandC: oklch(0.82 0.15 85); --bandD: oklch(0.72 0.18 50); --bandE: var(--accent);
  color-scheme: dark;
}
html { color-scheme: light; }
body { transition: background .35s ease, color .35s ease; }

.theme-toggle {
  font: inherit; font-size: 11px; letter-spacing: .07em; text-transform: uppercase;
  font-weight: 600; color: var(--n700); background: var(--surface);
  border: 1px solid var(--divider); border-radius: 2px; padding: 5px 9px;
  cursor: pointer; display: inline-flex; align-items: center; gap: 6px; margin-left: 14px;
  transition: color .2s, border-color .2s;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
.theme-toggle::before {
  content: ""; width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent); flex: none;
}
@media print { .theme-toggle { display: none; } }