/* ---------------------------------------------------------------------------
   Eva marketing page — proof copy, same stock as the app.
   Every token below is lifted verbatim from apps/desktop/src/style.css:
   cream manuscript paper, archival node inks, and #CB181D reserved for the
   red pen: selection, redlines, holds. Never decoration.
--------------------------------------------------------------------------- */

@font-face {
  font-family: 'Fragment Mono';
  src: url('fonts/fragment-mono-latin-400-normal.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Instrument Sans Variable';
  src: url('fonts/instrument-sans-latin-wght-normal.woff2') format('woff2-variations');
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Newsreader Variable';
  src: url('fonts/newsreader-latin-opsz-normal.woff2') format('woff2-variations');
  font-weight: 200 800;
  font-style: normal;
  font-display: swap;
}

:root {
  color-scheme: light; /* single-theme by design: ink on paper, like the app */

  --paper: #f5f5f0;
  --recess: #ecebe1;
  --hairline: #d9d7c9;
  --ink: #26251f;
  --ink-dim: #75726e;
  --red: #cb181d;

  --vellum-hi: rgba(255, 255, 253, 0.74);
  --vellum-lo: rgba(251, 250, 244, 0.56);
  --vellum-edge: rgba(120, 115, 95, 0.24);

  --font-data: 'Fragment Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-body: 'Instrument Sans Variable', 'Instrument Sans', system-ui, sans-serif;
  --font-opening: 'Newsreader Variable', 'Newsreader', Georgia, serif;

  /* node inks — muted archival tones, none competing with the red pen */
  --node-index: #7c3a2d;
  --node-concept: #46617d;
  --node-entity: #5c7150;
  --node-summary: #8c6a4f;
  --node-analysis: #7c5b78;
  --node-project: #a98436;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 800px at 50% 20%, #f8f8f4, transparent 75%),
    var(--paper);
}

/* paper tooth: one static grain layer, no animation (same data URI as app) */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0.03;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Vellum sheets: warm-white panes, graphite depth, never dark glass -------- */
.vellum {
  border-radius: 14px;
  border: 1px solid var(--vellum-edge);
  background: linear-gradient(180deg, var(--vellum-hi), var(--vellum-lo));
  -webkit-backdrop-filter: blur(16px) saturate(1.05);
  backdrop-filter: blur(16px) saturate(1.05);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 18px 44px rgba(60, 55, 40, 0.13),
    0 4px 12px rgba(60, 55, 40, 0.09);
}

/* Layout shell -------------------------------------------------------------- */
main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 28px;
}

.site-head {
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-opening);
  font-size: 28px;
  font-variation-settings: 'opsz' 36;
  font-weight: 510;
  letter-spacing: -0.055em;
  line-height: 1;
}

.brand img {
  display: block;
  mix-blend-mode: multiply;
}

.head-side {
  display: flex;
  align-items: center;
  gap: 14px;
}

.platform-note {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
}

/* Language choice: the same quiet mono chrome the app's settings use */
.lang-picker {
  appearance: none;
  -webkit-appearance: none;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 5px 26px 5px 12px;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5'%3E%3Cpath d='M0 0l4 5 4-5z' fill='%2375726e'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.lang-picker:hover { border-color: var(--ink-dim); }
.lang-picker:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }

/* Hero ---------------------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: minmax(320px, 5fr) minmax(360px, 6fr);
  gap: 44px;
  align-items: center;
  padding: 56px 0 72px;
}

.kicker {
  margin: 0 0 10px;
  color: var(--red);
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 14px;
  font-family: var(--font-opening);
  font-variation-settings: 'opsz' 36;
  font-weight: 510;
  letter-spacing: -0.045em;
  line-height: 1.04;
  font-size: clamp(38px, 5.4vw, 58px);
  color: #302e28;
}

.hero-sub {
  margin: 0 0 24px;
  max-width: 42ch;
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-dim);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* Red-pen action button, verbatim treatment from the app ------------------- */
.btn-stamp {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--red);
  background: transparent;
  border: 1px solid var(--red);
  border-radius: 999px;
  padding: 10px 18px;
  text-decoration: none;
  transition: background 200ms ease, color 200ms ease;
}

.btn-stamp:hover { background: var(--red); color: var(--paper); }
.btn-stamp:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }

.btn-quiet {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 2px;
  transition: color 200ms ease, border-color 200ms ease;
}

.btn-quiet:hover { color: var(--ink); border-color: var(--ink-dim); }
.btn-quiet:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }

/* Download confirmation dialog: a vellum sheet over the dimmed manuscript */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(38, 37, 31, 0.32);
  opacity: 0;
  transition: opacity 180ms ease;
}

.modal-overlay[hidden] { display: none; }
.modal-overlay.open { opacity: 1; }

.modal-panel {
  position: relative;
  width: min(480px, 100%);
  padding: 24px 26px 22px;
  outline: none;
  transform: translateY(10px);
  transition: transform 180ms ease;
}

.modal-overlay.open .modal-panel { transform: none; }

.modal-panel h2 {
  margin: 0 36px 10px 0;
  font-family: var(--font-opening);
  font-variation-settings: 'opsz' 24;
  font-weight: 510;
  letter-spacing: -0.02em;
  font-size: 24px;
  color: #302e28;
}

.modal-panel p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.55;
  color: #4a4840;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 28px;
  height: 28px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  background: transparent;
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  transition: color 200ms ease, border-color 200ms ease;
}

.modal-close:hover { color: var(--red); border-color: var(--red); }
.modal-close:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }

.modal-code {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 16px;
  padding: 9px 9px 9px 12px;
  background: var(--recess);
  border: 1px solid var(--hairline);
  border-radius: 8px;
}

.modal-code code {
  font-family: var(--font-data);
  font-size: 12.5px;
  color: var(--ink);
  user-select: all;
  -webkit-user-select: all;
}

.modal-copy { flex-shrink: 0; padding: 6px 12px; }

.modal-actions {
  display: flex;
  justify-content: flex-end;
}

/* The live brain -------------------------------------------------------------
   Same marks as the app: ink cores with a paper stroke and graphite lift,
   quiet grey links, red dashed ring on the selected page. */
.hero-graph {
  margin: 0;
  padding: 10px 10px 6px;
}

#brain {
  display: block;
  width: 100%;
  height: auto;
  cursor: default;
}

#brain line.edge {
  stroke: rgba(38, 37, 31, 0.16);
  stroke-width: 1;
  transition: opacity 250ms ease;
}

#brain line.edge.lit {
  stroke: var(--red);
  stroke-opacity: 0.55;
  stroke-width: 1.2;
}

#brain .node { cursor: pointer; transition: opacity 250ms ease; }

#brain .node circle.core {
  stroke: var(--paper);
  stroke-width: 2;
}

#brain .node circle.ring {
  display: none;
  fill: none;
  stroke: var(--red);
  stroke-width: 1.5;
  stroke-dasharray: 4 4;
}

#brain .node.selected circle.ring {
  display: inline;
  animation: redpen 7s linear infinite;
}

@keyframes redpen {
  to { stroke-dashoffset: -48; }
}

#brain .node text {
  fill: rgba(38, 37, 31, 0.72);
  font-family: var(--font-data);
  font-size: 10px;
  text-anchor: middle;
  pointer-events: none;
}

#brain .node.selected text { fill: var(--ink); }

#brain.focused .node.faded { opacity: 0.16; }
#brain.focused line.edge.faded { opacity: 0.22; }

.graph-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 8px 10px 6px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-data);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
}

.graph-legend .key {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.graph-legend .type-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dot, var(--ink-dim));
  box-shadow: 0 1px 2px rgba(60, 55, 40, 0.35);
}

/* Prose block ---------------------------------------------------------------- */
.prose-block {
  padding: 40px 0 64px;
  border-top: 1px solid var(--hairline);
}

.prose-block h2,
.ops h2,
.trust h2 {
  margin: 0 0 18px;
  font-family: var(--font-opening);
  font-variation-settings: 'opsz' 24;
  font-weight: 510;
  letter-spacing: -0.03em;
  font-size: clamp(26px, 3.4vw, 34px);
  color: #302e28;
}

.prose-block p {
  max-width: 62ch;
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.6;
  color: #4a4840;
}

/* See it in action: real app footage, on its own vellum sheet ------------------ */
.demo { padding: 40px 0 64px; border-top: 1px solid var(--hairline); }

.demo-lead {
  max-width: 62ch;
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.6;
  color: #4a4840;
}

.demo-figure {
  margin: 0;
  padding: 10px;
  max-width: 720px;
}

.demo-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

/* Operations ------------------------------------------------------------------ */
.ops { padding: 40px 0 64px; border-top: 1px solid var(--hairline); }

.ops-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 26px;
}

.op-cell { padding: 20px 22px 16px; }

.op-cell h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.op-cell p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.55;
  color: #4a4840;
}

.op-cell code,
.trust-item code {
  font-family: var(--font-data);
  font-size: 0.92em;
  background: var(--recess);
  border-radius: 4px;
  padding: 1px 4px;
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
}

.chip {
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.02em;
  color: var(--ink-dim);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 3px 9px;
  background: rgba(255, 255, 253, 0.6);
}

.chip-hold {
  color: var(--red);
  border-color: rgba(203, 24, 29, 0.45);
  background: rgba(203, 24, 29, 0.05);
}

.chip-issue { border-style: dashed; }

.chip-cite { color: #4a4840; }

/* Trust ledger ------------------------------------------------------------------ */
.trust { padding: 40px 0 72px; border-top: 1px solid var(--hairline); }

.trust-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px 40px;
  margin: 26px 0 0;
}

.trust-item dt {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 6px;
}

.trust-item dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.55;
  color: #4a4840;
  max-width: 46ch;
}

/* Footer -------------------------------------------------------------------------- */
.site-foot {
  border-top: 1px solid var(--hairline);
  max-width: 1120px;
  margin: 0 auto;
  padding: 22px 28px 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.foot-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--ink-dim);
}

.foot-brand img { mix-blend-mode: multiply; }

.foot-links {
  display: flex;
  gap: 18px;
}

.foot-links a {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-dim);
  text-decoration: none;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 2px;
}

.foot-links a:hover { color: var(--red); border-color: var(--red); }

/* Responsive ------------------------------------------------------------------------ */
@media (max-width: 880px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 36px 0 52px;
  }
  .ops-grid, .trust-grid { grid-template-columns: 1fr; }
}

/* CJK typography: the Latin display tracking reads wrong on han/kana/hangul,
   and Newsreader has no CJK glyphs, so the system serif steps in. ---------------- */
:lang(ja) .hero h1, :lang(ko) .hero h1, :lang(zh-Hans) .hero h1, :lang(zh-Hant) .hero h1,
:lang(ja) h2, :lang(ko) h2, :lang(zh-Hans) h2, :lang(zh-Hant) h2 {
  letter-spacing: 0;
  line-height: 1.24;
}

:lang(ja) .hero-sub, :lang(ko) .hero-sub, :lang(zh-Hans) .hero-sub, :lang(zh-Hant) .hero-sub {
  line-height: 1.75;
}

/* Motion discipline: the graph settles instantly and holds still ------------------ */
@media (prefers-reduced-motion: reduce) {
  #brain .node.selected circle.ring { animation: none; }
  #brain .node, #brain line.edge, .btn-stamp, .btn-quiet { transition: none; }
  .modal-overlay, .modal-panel, .modal-close { transition: none; }
}