/* ===========================================================
   Kayris.app — design tokens
   Palette: observatory ink, mist paper, clinical teal, brass
   Type: Fraunces (display) / Inter (body) / IBM Plex Mono (data)
   Signature: the Kairos Dial — a hand-drawn instrument arc
   =========================================================== */

:root {
  --ink: #101E28;
  --ink-soft: #1B2E3B;
  --paper: #EEF1EC;
  --paper-raised: #F8F9F6;
  --teal: #1D6B63;
  --teal-deep: #134A44;
  --brass: #A97C3E;
  --brass-soft: #C9A46C;
  --slate: #48565E;
  --slate-soft: #7C8A90;
  --line: #D4DAD2;
  --line-on-ink: rgba(238, 241, 236, 0.16);
  --white: #FFFFFF;

  --display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", monospace;

  --max: 1180px;
  --radius: 2px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 600;
  color: var(--ink);
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

a { color: var(--teal-deep); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, [tabindex]:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
}

img, svg { max-width: 100%; display: block; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brass);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--brass);
  display: inline-block;
}

/* ---------------- Header ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(238, 241, 236, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.wordmark {
  font-family: var(--display);
  font-weight: 600;
  font-size: 20px;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}
.wordmark sup { font-size: 10px; font-weight: 500; color: var(--brass); }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0; padding: 0;
  font-size: 14px;
}
.nav-links a {
  color: var(--slate);
  text-decoration: none;
  font-weight: 500;
}
.nav-links a:hover { color: var(--teal-deep); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--body);
  font-weight: 600;
  font-size: 14px;
  padding: 11px 22px;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--teal-deep); }
.btn-ghost { border-color: var(--slate-soft); color: var(--ink); }
.btn-ghost:hover { border-color: var(--ink); }

/* ---------------- Hero ---------------- */

.hero {
  background: var(--ink);
  color: var(--paper);
  padding: 88px 0 96px;
  position: relative;
  overflow: hidden;
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}
.hero .eyebrow { color: var(--brass-soft); }
.hero .eyebrow::before { background: var(--brass-soft); }
.hero h1 {
  color: var(--white);
  font-size: clamp(34px, 4.4vw, 54px);
  line-height: 1.08;
  max-width: 15ch;
}
.hero h1 em {
  font-style: italic;
  color: var(--brass-soft);
}
.hero p.lede {
  font-size: 18px;
  color: rgba(238, 241, 236, 0.78);
  max-width: 46ch;
  margin: 22px 0 34px;
}
.hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .btn-primary { background: var(--brass); color: var(--ink); }
.hero .btn-primary:hover { background: var(--brass-soft); }
.hero .btn-ghost { border-color: var(--line-on-ink); color: var(--paper); }
.hero .btn-ghost:hover { border-color: var(--paper); }

.dial-wrap { position: relative; display: flex; justify-content: center; }
.dial-caption {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate-soft);
  text-align: center;
  margin-top: 14px;
}

/* ---------------- Sections ---------------- */

section { padding: 88px 0; }
.section-alt { background: var(--paper-raised); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-ink { background: var(--ink); color: var(--paper); }
.section-ink h2 { color: var(--white); }
.section-ink .eyebrow { color: var(--brass-soft); }
.section-ink .eyebrow::before { background: var(--brass-soft); }

.section-head { max-width: 62ch; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(26px, 3vw, 36px); }
.section-head p { color: var(--slate); font-size: 17px; }
.section-ink .section-head p { color: rgba(238,241,236,0.72); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }

.card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 30px;
  border-radius: var(--radius);
}
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--slate); font-size: 15px; margin: 0; }
.card .num { font-family: var(--mono); color: var(--brass); font-size: 13px; margin-bottom: 14px; display: block; }

/* Equation badges */
.eq-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.eq-badge {
  font-family: var(--mono);
  font-size: 12.5px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--slate);
  padding: 9px 14px;
  border-radius: 999px;
}

/* Architecture diagram */
.arch {
  border: 1px solid var(--line);
  background: var(--paper-raised);
  padding: 40px;
  border-radius: var(--radius);
}
.arch-row { display: flex; align-items: center; gap: 18px; }
.arch-box {
  flex: 1;
  border: 1px dashed var(--slate-soft);
  padding: 20px;
  text-align: center;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--slate);
}
.arch-boundary {
  border: 1.5px solid var(--teal);
  padding: 26px;
  position: relative;
}
.arch-boundary::before {
  content: "stays on device";
  position: absolute;
  top: -11px;
  left: 20px;
  background: var(--paper-raised);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
  padding: 0 8px;
}
.arch-exit {
  margin-top: 26px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--brass);
}
.arch-exit .line { flex: 1; height: 1px; background: repeating-linear-gradient(90deg, var(--brass) 0 6px, transparent 6px 11px); }

/* Kairos tier ladder */
.tier-ladder { display: flex; flex-direction: column; gap: 1px; border: 1px solid var(--line); }
.tier-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  background: var(--paper-raised);
}
.tier-row + .tier-row { border-top: 1px solid var(--line); }
.tier-name {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}
.tier-dot { width: 8px; height: 8px; border-radius: 50%; }
.tier-desc { padding: 18px 20px 18px 0; color: var(--slate); font-size: 14.5px; }

/* Quote / persona */
.persona {
  border-left: 2px solid var(--brass);
  padding: 4px 0 4px 26px;
  font-family: var(--display);
  font-style: italic;
  font-size: 21px;
  line-height: 1.5;
  color: var(--ink);
  max-width: 60ch;
}
.persona-cite { font-family: var(--mono); font-style: normal; font-size: 12.5px; color: var(--slate-soft); margin-top: 14px; text-transform: uppercase; letter-spacing: 0.06em; }

/* Download / campaign */
.download-panel {
  background: var(--ink);
  color: var(--paper);
  padding: 64px;
  border-radius: var(--radius);
  text-align: center;
}
.campaign-line {
  font-family: var(--display);
  font-style: italic;
  font-size: clamp(20px, 2.6vw, 28px);
  color: var(--brass-soft);
  max-width: 32ch;
  margin: 0 auto 30px;
  line-height: 1.4;
}
.store-badges { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-top: 30px; }
.store-badge {
  border: 1px solid var(--line-on-ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 13px;
  padding: 13px 24px;
  border-radius: var(--radius);
  text-decoration: none;
  display: inline-flex;
  gap: 8px;
}
.store-badge:hover { border-color: var(--brass-soft); }

/* Footer */
footer {
  background: var(--ink);
  color: var(--slate-soft);
  padding: 48px 0 32px;
  border-top: 1px solid var(--line-on-ink);
}
footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
}
.foot-links { display: flex; gap: 24px; list-style: none; padding: 0; margin: 0; flex-wrap: wrap; }
.foot-links a { color: var(--paper); text-decoration: none; font-size: 14px; }
.foot-links a:hover { color: var(--brass-soft); }
.foot-legal { font-size: 12.5px; color: var(--slate-soft); max-width: 60ch; margin-top: 18px; line-height: 1.7; }

/* ---------------- Privacy / legal document page ---------------- */

.doc-hero {
  background: var(--ink);
  color: var(--paper);
  padding: 64px 0 52px;
}
.doc-hero .eyebrow { color: var(--brass-soft); }
.doc-hero .eyebrow::before { background: var(--brass-soft); }
.doc-hero h1 { color: var(--white); font-size: clamp(28px, 3.6vw, 42px); max-width: 20ch; }
.doc-meta { font-family: var(--mono); font-size: 12.5px; color: var(--slate-soft); margin-top: 14px; }

.doc-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 56px;
  padding: 64px 0 100px;
  align-items: start;
}
.doc-toc {
  position: sticky;
  top: 96px;
  border-left: 1px solid var(--line);
  padding-left: 20px;
}
.doc-toc .eyebrow { margin-bottom: 16px; }
.doc-toc ol { list-style: none; margin: 0; padding: 0; counter-reset: toc; }
.doc-toc li { counter-increment: toc; margin-bottom: 12px; }
.doc-toc a {
  font-size: 13.5px;
  color: var(--slate);
  text-decoration: none;
  display: flex;
  gap: 10px;
}
.doc-toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--mono);
  color: var(--brass);
  font-size: 12px;
}
.doc-toc a:hover { color: var(--teal-deep); }

.doc-body { max-width: 72ch; }
.doc-summary {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  padding: 24px 28px;
  margin-bottom: 52px;
  font-size: 15px;
  color: var(--slate);
}
.doc-summary strong { color: var(--ink); }

.doc-section { padding-top: 44px; margin-top: 44px; border-top: 1px solid var(--line); scroll-margin-top: 96px; }
.doc-section:first-of-type { border-top: none; margin-top: 0; padding-top: 0; }
.doc-section h2 {
  font-size: 22px;
  display: flex;
  align-items: baseline;
  gap: 14px;
}
.doc-section h2 .sec-num { font-family: var(--mono); font-size: 14px; color: var(--brass); font-weight: 500; }
.doc-section h3 { font-size: 16px; margin-top: 28px; color: var(--ink); }
.doc-section p, .doc-section li { color: var(--slate); font-size: 15.5px; }
.doc-section ul { padding-left: 20px; }
.doc-section li { margin-bottom: 8px; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 14px;
}
.data-table th, .data-table td {
  text-align: left;
  padding: 12px 16px;
  border: 1px solid var(--line);
  vertical-align: top;
}
.data-table th {
  background: var(--paper-raised);
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink);
}
.data-table td { color: var(--slate); }

.callout {
  border: 1px solid var(--line);
  border-left: 3px solid var(--brass);
  padding: 18px 22px;
  background: var(--paper-raised);
  font-size: 14.5px;
  color: var(--slate);
  margin: 24px 0;
}
.callout strong { color: var(--ink); }

.exit-flag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--teal-deep);
  background: rgba(29, 107, 99, 0.08);
  border: 1px solid rgba(29, 107, 99, 0.25);
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.exit-flag.leaves {
  color: var(--brass);
  background: rgba(169, 124, 62, 0.09);
  border-color: rgba(169, 124, 62, 0.3);
}

/* ---------------- Responsive ---------------- */

@media (max-width: 880px) {
  .nav-links { display: none; }
  .hero .wrap { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 64px; text-align: left; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  section { padding: 64px 0; }
  .doc-layout { grid-template-columns: 1fr; padding: 44px 0 72px; }
  .doc-toc { position: static; border-left: none; padding-left: 0; border-top: 1px solid var(--line); padding-top: 20px; }
  .download-panel { padding: 40px 24px; }
  .tier-row { grid-template-columns: 1fr; }
  .tier-desc { padding: 0 20px 16px; }
}

/* ---------------- Product family (kayris.health hub) ---------------- */

.product-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }

.product-card {
  background: var(--paper-raised);
  border: 1px solid var(--line);
  padding: 36px;
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
}
.product-card.is-pending { background: transparent; border-style: dashed; }

.status-tag {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  display: inline-block;
  width: fit-content;
  margin-bottom: 18px;
}
.status-tag.is-live { color: var(--teal-deep); background: rgba(29, 107, 99, 0.08); border: 1px solid rgba(29, 107, 99, 0.25); }
.status-tag.is-pending { color: var(--slate-soft); background: transparent; border: 1px solid var(--line); }

.product-card h3 { font-size: 24px; margin-bottom: 12px; }
.product-card p { color: var(--slate); font-size: 15.5px; margin: 0; flex-grow: 1; }
.product-card.is-pending p { color: var(--slate-soft); }

.product-ctas { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }

/* Trust line */
.trust-line { max-width: 62ch; }
.trust-line p { color: var(--slate); font-size: 16px; }
.trust-line a { font-weight: 600; }

@media (max-width: 880px) {
  .product-grid { grid-template-columns: 1fr; }
}