/* ============================================================
   WebSigil — Design System v2 "The Measuring Instrument"
   ------------------------------------------------------------
   Direction: metrology authority, not SaaS template.
   Three type voices:
     display  Fraunces        — institutional statements
     body     IBM Plex Sans   — explanation
     mono     IBM Plex Mono   — every measured value, status,
                                 label, registry entry (readouts)
   Accent discipline: --seal (teal) is reserved for evidence,
   status and the sigil trace. Primary actions are INK.
   Structural device: ruler ticks + registry rules.
   Signature: the living sigil (dotted evidence trace, hero).
   ============================================================ */

:root {
  /* ink scale */
  --ink-950: #070c16;
  --ink-900: #0b1222;
  --ink-700: #222c42;
  --ink-500: #46536c;
  --ink-350: #7c879c;
  --ink-200: #b7c0cd;

  /* surfaces */
  --paper: #f4f6f7;
  --surface: #ffffff;
  --line: #dbe1e7;
  --line-strong: #c2cbd5;

  /* seal accent — evidence only */
  --seal: #0e9e93;
  --seal-deep: #0b7b73;
  --seal-wash: rgba(14, 158, 147, 0.08);

  /* type */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", monospace;

  /* geometry */
  --radius: 3px;
  --shadow: 0 14px 44px rgba(7, 12, 22, 0.10);
  --shadow-soft: 0 8px 26px rgba(7, 12, 22, 0.06);

  /* ruler tick divider */
  --ticks: repeating-linear-gradient(
    to right,
    var(--line-strong) 0 1px,
    transparent 1px 12px
  );
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-900);
  font-family: var(--font-body);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, input { font: inherit; }

::selection { background: var(--seal-wash); color: var(--ink-900); }

:focus-visible {
  outline: 2px solid var(--seal-deep);
  outline-offset: 2px;
}

/* ---------- shell + header ---------- */

.site-shell { min-height: 100vh; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 28px;
  align-items: center;
  min-height: 72px;
  padding: 0 48px;
  background: rgba(244, 246, 247, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark { width: 44px; height: 37px; }
.brand-word {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink-700);
}
.nav-links a { padding: 8px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover { color: var(--ink-950); border-bottom-color: var(--seal); }

.header-actions { display: flex; align-items: center; gap: 14px; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 42px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: background 150ms ease, border-color 150ms ease, color 150ms ease;
}

.button-primary { background: var(--ink-900); color: #ffffff; }
.button-primary:hover { background: var(--ink-950); }

.button-secondary {
  background: transparent;
  color: var(--ink-900);
  border-color: var(--line-strong);
}
.button-secondary:hover { border-color: var(--ink-500); }

.button-ghost {
  background: transparent;
  color: var(--seal-deep);
  padding-left: 0;
  padding-right: 0;
}
.button-ghost:hover { color: var(--ink-900); }

.menu-button {
  display: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-weight: 600;
}

/* ---------- layout primitives ---------- */

main { min-height: calc(100vh - 154px); }
.page { width: min(1180px, calc(100vw - 48px)); margin: 0 auto; }
.section { padding: 58px 0; }

/* ruler-tick divider: metrology in the structure */
.rule-ticks {
  height: 9px;
  border-top: 1px solid var(--line-strong);
  background: var(--ticks);
  background-size: 12px 7px;
  background-repeat: repeat-x;
  background-position: 0 0;
}

/* mono eyebrow — instrument label */
.eyebrow {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--seal-deep);
}
.eyebrow::before { content: "— "; color: var(--ink-350); }

h1, h2, h3, p { margin-top: 0; }

h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(48px, 7.4vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.018em;
  max-width: 620px;
  margin-bottom: 22px;
}
h1 em { font-style: italic; font-weight: 500; }

.lead {
  max-width: 560px;
  margin-bottom: 20px;
  font-size: 20px;
  line-height: 1.4;
  font-weight: 500;
  color: var(--ink-700);
}

.support {
  max-width: 600px;
  margin-bottom: 30px;
  color: var(--ink-500);
  font-size: 16px;
  line-height: 1.75;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.85fr);
  gap: 56px;
  align-items: center;
  padding: 88px 0 58px;
}

.hero-actions, .card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 28px;
}
.section-header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 32px;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
.section-header p {
  max-width: 520px;
  margin: 0;
  color: var(--ink-500);
  line-height: 1.65;
}

/* ---------- signature: the living sigil + registry card ---------- */

.hero-visual { position: relative; }

.sigil-stage {
  position: absolute;
  inset: -46px -30px auto auto;
  width: 300px;
  height: 300px;
  z-index: 0;
  opacity: 0.5;
  pointer-events: none;
}

.sigil-trace {
  fill: none;
  stroke: var(--seal);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-dasharray: 0.1 9;
}
.sigil-frame { stroke: var(--ink-200); stroke-width: 1.4; fill: none; }

@keyframes trace-draw {
  from { stroke-dashoffset: 640; opacity: 0; }
  20%  { opacity: 1; }
  to   { stroke-dashoffset: 0; opacity: 1; }
}
.sigil-trace { animation: trace-draw 2.4s ease-out 300ms both; }

@media (prefers-reduced-motion: reduce) {
  .sigil-trace { animation: none; }
}

/* registry card — a calibration certificate, not a dashboard */
.registry {
  position: relative;
  z-index: 1;
  padding: 26px 28px 24px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  font-family: var(--font-mono);
}

.registry-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-500);
}
.registry-head strong { color: var(--ink-900); }

.registry .rule-ticks { margin: 14px 0 6px; }

.registry-row {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  gap: 14px;
  align-items: center;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}
.registry-row:last-of-type { border-bottom: 0; }

.registry-glyph {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-350);
}

.registry-label { color: var(--ink-700); letter-spacing: 0.01em; }
.registry-label small {
  display: block;
  margin-top: 2px;
  color: var(--ink-350);
  font-size: 11px;
}

/* stamped status — bordered mono, never a filled pill */
.stamp {
  display: inline-flex;
  align-items: center;
  padding: 4px 9px;
  border: 1px solid var(--ink-200);
  border-radius: 2px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-500);
  white-space: nowrap;
}
.stamp-live { border-color: var(--seal); color: var(--seal-deep); background: var(--seal-wash); }
.stamp-warn { border-color: #d8b26a; color: #8a6a1f; }

.registry-note {
  margin: 16px 0 0;
  font-family: var(--font-body);
  color: var(--ink-350);
  font-size: 12px;
  line-height: 1.55;
}

/* ---------- cards, grids ---------- */

.surface-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.four-column { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.three-column { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 16px;
  align-items: stretch;
}

.card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.card h3 {
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.005em;
}

.card p, .card li {
  color: var(--ink-500);
  font-size: 14px;
  line-height: 1.6;
}
.card p:last-child { margin-bottom: 0; }

.card-glyph {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  color: var(--ink-200);
  line-height: 1;
  margin-bottom: 16px;
}

.card-kicker {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-350);
}

.card .stamp { margin-top: 16px; }

.card ul { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.card li::before {
  content: "· ";
  color: var(--seal);
  font-weight: 700;
}

/* dark authority panel */
.dark-panel {
  position: relative;
  overflow: hidden;
  padding: 46px;
  border-radius: var(--radius);
  background: var(--ink-950);
  color: #ffffff;
}
.dark-panel h2 {
  max-width: 660px;
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 34px;
  line-height: 1.12;
  letter-spacing: -0.01em;
}
.dark-panel p {
  max-width: 620px;
  margin-bottom: 24px;
  color: #b9c3d2;
  line-height: 1.75;
}
.dark-panel .button-primary { background: #ffffff; color: var(--ink-950); }
.dark-panel .button-primary:hover { background: #e8ecf1; }

.dark-panel::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -50px;
  width: 300px;
  height: 200px;
  opacity: 0.35;
  background-image: radial-gradient(circle, var(--seal) 1.3px, transparent 1.5px);
  background-size: 11px 11px;
  transform: rotate(-10deg);
}

/* ---------- research page ---------- */

.paper-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: start;
  padding: 30px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.paper-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 24px;
  line-height: 1.18;
  max-width: 560px;
}
.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 14px 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-500);
}
.paper-abstract { max-width: 640px; color: var(--ink-500); line-height: 1.7; font-size: 14.5px; }

/* ---------- auth + reviewer room ---------- */

.login-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(380px, 0.65fr);
  gap: 36px;
  align-items: start;
  padding: 62px 0;
}
.login-copy h1 { font-size: clamp(40px, 5.6vw, 62px); }

.access-card {
  padding: 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}
.access-card h2 {
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 25px;
}
.access-card p { color: var(--ink-500); line-height: 1.6; }

.github-button { width: 100%; margin-top: 12px; background: var(--ink-900); color: #fff; }

.auth-alert {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid #e3c48c;
  border-radius: var(--radius);
  background: #fdf7ec;
  color: #6f4d14;
  font-size: 13px;
  line-height: 1.5;
}

.nda-box { display: grid; gap: 15px; }
.nda-statement {
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--seal);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink-700);
  font-size: 14px;
  line-height: 1.6;
}
.checkline {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 10px;
  color: var(--ink-700);
  font-size: 14px;
  line-height: 1.5;
}
.checkline input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--seal-deep); }

/* reviewer room */

.secure-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}
.secure-top h1 { font-size: 46px; margin-bottom: 8px; }

.user-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 13px 7px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
}
.user-chip img, .avatar-fallback {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--ink-900); color: #fff;
}
.avatar-fallback {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 12px;
}

.document-room {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 16px;
}
.doc-list { display: grid; gap: 12px; align-content: start; }

.doc-card {
  width: 100%;
  padding: 18px;
  text-align: left;
  cursor: pointer;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  transition: border-color 150ms ease;
}
.doc-card:hover { border-color: var(--seal); }
.doc-card h3 { margin-bottom: 6px; font-family: var(--font-display); font-size: 16.5px; font-weight: 600; }
.doc-card p { margin: 0 0 4px; color: var(--ink-500); font-size: 12.5px; line-height: 1.5; }
.doc-card .stamp { margin-top: 10px; }
.doc-card[disabled] { cursor: not-allowed; opacity: 0.55; }

.viewer-shell {
  position: relative;
  min-height: 760px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.viewer-watermark {
  position: absolute;
  top: 14px; right: 18px; z-index: 2;
  pointer-events: none;
  font-family: var(--font-mono);
  color: rgba(11, 18, 34, 0.4);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.pdf-frame { width: 100%; height: 760px; border: 0; }
.empty-viewer {
  display: grid; place-items: center;
  min-height: 760px; padding: 30px;
  color: var(--ink-500); text-align: center;
}
.empty-viewer h2 { font-family: var(--font-display); font-weight: 600; }

/* ---------- footer ---------- */

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 30px;
  align-items: center;
  min-height: 82px;
  padding: 20px 48px;
  background: var(--ink-950);
  color: #ffffff;
}
.footer-brand { display: inline-flex; align-items: center; gap: 11px; }
.footer-brand img { width: 40px; height: 33px; filter: brightness(0) invert(1); }
.footer-brand div { display: grid; gap: 3px; }
.footer-brand strong { font-family: var(--font-display); font-weight: 600; font-size: 17px; }
.footer-brand span { color: #93a0b3; font-size: 11.5px; }

.footer-claim {
  padding-left: 22px;
  border-left: 2px solid var(--seal);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 17px;
}
.footer-claim em { font-style: italic; }

.footer-system {
  font-family: var(--font-mono);
  color: #93a0b3;
  font-size: 10.5px;
  letter-spacing: 0.14em;
}

/* ---------- responsive ---------- */

@media (max-width: 980px) {
  .site-header { grid-template-columns: auto auto; padding: 0 22px; }
  .nav-links, .header-actions { display: none; }
  .nav-links.is-open, .header-actions.is-open { display: grid; }
  .nav-links.is-open {
    position: absolute;
    top: 72px; left: 0; right: 0;
    padding: 18px 22px;
    gap: 4px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
  }
  .menu-button { display: inline-flex; justify-self: end; }

  .page { width: min(100% - 32px, 760px); }
  .hero, .login-layout, .two-column, .four-column,
  .document-room, .paper-card { grid-template-columns: 1fr; }
  .surface-grid { grid-template-columns: repeat(2, 1fr); }
  .three-column { grid-template-columns: 1fr; }
  .sigil-stage { display: none; }
  .site-footer { grid-template-columns: 1fr; padding: 22px; }
  .footer-claim { padding-left: 0; border-left: 0; }
}

@media (max-width: 560px) {
  .hero { padding-top: 48px; }
  .brand-word { font-size: 21px; }
  h1 { font-size: 46px; }
  .surface-grid { grid-template-columns: 1fr; }
  .section-header { display: block; }
  .registry, .dark-panel, .access-card, .paper-card { padding: 22px; }
  .secure-top { display: block; }
}