/* Noēsis — design tokens */
:root {
  /* Aegean palette */
  --ink: #0b1220;          /* near-black midnight */
  --navy: #16213d;         /* deep navy */
  --navy-2: #1d2a4a;
  --parchment: #f1ead8;    /* warm bone */
  --parchment-2: #e8dfc8;
  --vellum: #faf6ec;       /* lighter paper */
  --terracotta: #b8542f;   /* muted terracotta accent */
  --terracotta-2: #d97a4f;
  --bronze: #8a6a3b;
  --rule: rgba(11, 18, 32, 0.18);
  --rule-soft: rgba(11, 18, 32, 0.10);
  --rule-on-dark: rgba(241, 234, 216, 0.18);
  --muted: rgba(11, 18, 32, 0.62);
  --muted-on-dark: rgba(241, 234, 216, 0.62);

  /* Type */
  --serif: "Cormorant Garamond", "GFS Didot", "EB Garamond", Georgia, serif;
  --sans: "Söhne", "Inter Tight", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: "JetBrains Mono", "Berkeley Mono", "IBM Plex Mono", ui-monospace, monospace;

  /* Density */
  --pad-section: clamp(80px, 10vw, 160px);
  --pad-x: clamp(28px, 6vw, 96px);
  --maxw: 1280px;
  --readw: 62ch;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  background: var(--parchment);
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "onum";
  text-rendering: optimizeLegibility;
}

::selection { background: var(--terracotta); color: var(--vellum); }

/* Helpers */
.shell { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--pad-x); }
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--muted);
}
.hairline { border: 0; height: 1px; background: var(--rule); margin: 0; }
.hairline.dark { background: var(--rule-on-dark); }

/* Hairline draw-in */
.draw-rule {
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 1.2s cubic-bezier(.2,.7,.2,1);
}
.draw-rule.in { transform: scaleX(1); }

/* Type fade-up */
.fade {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .9s ease, transform .9s cubic-bezier(.2,.7,.2,1);
}
.fade.in { opacity: 1; transform: none; }
.fade.d1 { transition-delay: .08s; }
.fade.d2 { transition-delay: .16s; }
.fade.d3 { transition-delay: .24s; }
.fade.d4 { transition-delay: .32s; }
.fade.d5 { transition-delay: .40s; }

/* Section blocks */
section {
  padding-top: var(--pad-section);
  padding-bottom: var(--pad-section);
  position: relative;
}
section.dark {
  background: var(--ink);
  color: var(--parchment);
}
section.dark .eyebrow { color: var(--muted-on-dark); }

/* Greek glyph display */
.glyph {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.01em;
  line-height: 0.85;
}

/* Headings */
h1, h2, h3, h4 { font-weight: 400; margin: 0; letter-spacing: -0.015em; }
.display {
  font-family: var(--serif);
  font-size: clamp(48px, 7.2vw, 112px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 400;
}
.display em {
  font-style: italic;
  color: var(--terracotta);
}
.h2 {
  font-family: var(--serif);
  font-size: clamp(36px, 4.6vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.018em;
}
.h3 {
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.012em;
}
.lede {
  font-family: var(--serif);
  font-size: clamp(22px, 2.2vw, 30px);
  line-height: 1.35;
  letter-spacing: -0.005em;
  max-width: 28ch;
}
.body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
}
.body.dim { color: var(--muted); }
.poetic {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(24px, 2.6vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.mono { font-family: var(--mono); font-size: 13px; letter-spacing: 0.01em; }

/* Buttons / pills */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.pill .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--terracotta);
  box-shadow: 0 0 0 0 rgba(184,84,47,.5);
  animation: pulse 2.4s ease-out infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(184,84,47,.45); }
  70%  { box-shadow: 0 0 0 8px rgba(184,84,47,0); }
  100% { box-shadow: 0 0 0 0 rgba(184,84,47,0); }
}

/* Top nav */
.topnav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background: color-mix(in oklab, var(--parchment) 86%, transparent);
  border-bottom: 1px solid var(--rule-soft);
}
.topnav .row {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--serif);
  font-size: 22px;
  letter-spacing: -0.01em;
}
.brand .mark {
  width: 22px; height: 22px;
  display: inline-block;
  position: relative;
}
.brand .mark::before, .brand .mark::after {
  content: ""; position: absolute; inset: 0;
  border: 1px solid var(--ink);
}
.brand .mark::before { transform: rotate(0deg); border-radius: 50%; }
.brand .mark::after  { width: 1px; left: 50%; height: 100%; background: var(--ink); border: 0; }
.navlinks {
  display: flex; gap: 22px;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted);
}
.navlinks a { color: inherit; text-decoration: none; }
.navlinks a:hover { color: var(--ink); }

/* Hero */
.hero { position: relative; overflow: hidden; }
.hero .grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 64px;
  align-items: end;
}
.hero-glyph {
  position: absolute;
  right: -3vw;
  top: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  pointer-events: none;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(280px, 36vw, 560px);
  line-height: 0.8;
  color: var(--ink);
  opacity: 0.06;
  user-select: none;
}

/* Audience tabs */
.audience-tabs {
  display: inline-flex;
  border: 1px solid var(--rule);
  border-radius: 999px;
  padding: 3px;
  background: color-mix(in oklab, var(--parchment) 60%, white);
}
.audience-tabs button {
  appearance: none;
  border: 0;
  background: transparent;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: all .25s ease;
}
.audience-tabs button.active {
  background: var(--ink);
  color: var(--parchment);
}

/* Pillar list */
.pillar {
  display: grid;
  grid-template-columns: 80px 1fr 1.3fr;
  gap: 48px;
  align-items: start;
  padding: 56px 0;
  border-top: 1px solid var(--rule);
  position: relative;
}
.pillar:last-child { border-bottom: 1px solid var(--rule); }
.pillar .num {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  padding-top: 6px;
}
.pillar .left h3 {
  font-family: var(--serif);
  font-size: clamp(34px, 3.4vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin-bottom: 32px;
}
.pillar .left .greek {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.7em;
  color: var(--terracotta);
  margin-right: 14px;
  letter-spacing: -0.01em;
}
.pillar .left .poetic-line {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(20px, 1.6vw, 24px);
  line-height: 1.3;
  color: var(--ink);
  max-width: 22ch;
}
.pillar .right {
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.7;
  color: rgba(11,18,32,.78);
  max-width: 56ch;
}
.pillar .right code {
  font-family: var(--mono);
  font-size: 0.86em;
  background: color-mix(in oklab, var(--parchment-2) 80%, white);
  padding: 1px 6px;
  border-radius: 3px;
  border: 1px solid var(--rule-soft);
  color: var(--ink);
}
.pillar .right strong {
  font-weight: 500;
  color: var(--ink);
}

/* Architecture diagram */
.arch-stage {
  background: var(--ink);
  color: var(--parchment);
  border-radius: 16px;
  padding: clamp(28px, 4vw, 56px);
  position: relative;
}
.pkg-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(16px, 2vw, 32px);
  position: relative;
  z-index: 2;
}
.pkg {
  border: 1px solid var(--rule-on-dark);
  padding: 22px 24px 24px;
  background: color-mix(in oklab, var(--ink) 92%, var(--navy));
  position: relative;
  min-height: 180px;
  display: flex; flex-direction: column;
  gap: 10px;
  border-radius: 12px;
}
.pkg .pkg-name {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--terracotta-2);
}
.pkg .pkg-lang {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-on-dark);
}
.pkg .pkg-desc {
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.55;
  color: rgba(241,234,216,.78);
}
.pkg .pkg-tags {
  margin-top: auto;
  display: flex; flex-wrap: wrap; gap: 6px;
  font-family: var(--mono); font-size: 10.5px;
  color: var(--muted-on-dark);
}
.pkg .pkg-tags span {
  border: 1px solid var(--rule-on-dark);
  padding: 2px 6px;
  border-radius: 6px;
}

/* Bridge in middle of grid */
.bridge {
  position: absolute;
  left: 50%;
  top: 0; bottom: 0;
  width: 1px;
  background: var(--rule-on-dark);
  transform: translateX(-50%);
  z-index: 1;
}
.bridge .label {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--ink);
  padding: 8px 12px;
  border: 1px solid var(--terracotta);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--terracotta-2);
  white-space: nowrap;
}

/* Stack ribbon */
.stack {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--rule-on-dark);
  display: flex; flex-wrap: wrap;
  gap: 18px 24px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted-on-dark);
}
.stack .label { color: var(--terracotta-2); }

/* Etymology table */
.etym {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--serif);
}
.etym th, .etym td {
  text-align: left;
  padding: 22px 16px;
  border-bottom: 1px solid var(--rule-on-dark);
  vertical-align: baseline;
}
.etym thead th {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-on-dark);
  font-weight: 400;
}
.etym tbody td:nth-child(1) {
  font-size: 22px;
  letter-spacing: -0.005em;
  color: var(--parchment);
}
.etym tbody td:nth-child(2) {
  font-style: italic;
  font-size: 22px;
  color: var(--terracotta-2);
}
.etym tbody td:nth-child(3) {
  font-family: var(--sans);
  font-size: 14px;
  color: rgba(241,234,216,.8);
}

/* Closing */
.closing-display {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(48px, 6vw, 92px);
  line-height: 1.05;
  letter-spacing: -0.018em;
}
.closing-display .answer {
  font-style: normal;
  color: var(--terracotta-2);
}

/* Footer */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--rule-on-dark);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-on-dark);
}

/* Tick number */
.tick { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }

/* Responsive */
@media (max-width: 900px) {
  .hero .grid { grid-template-columns: 1fr; gap: 32px; }
  .pillar { grid-template-columns: 48px 1fr; gap: 24px; }
  .pillar .right { grid-column: 2 / -1; padding-top: 8px; }
  .pkg-grid { grid-template-columns: 1fr; }
  .bridge { display: none; }
}

/* Tweaks: density */
body[data-density="airy"] { --pad-section: clamp(120px, 14vw, 220px); }
body[data-density="tight"] { --pad-section: clamp(56px, 7vw, 100px); }

/* Tweaks: greek prominence */
body[data-greek="subtle"] .hero-glyph { opacity: 0.025; font-size: clamp(180px, 22vw, 360px); }
body[data-greek="bold"] .hero-glyph { opacity: 0.10; }

/* Palette variants */
body[data-palette="ink"] {
  --parchment: #f4efe6;
  --parchment-2: #ebe4d2;
  --vellum: #fbf8f0;
  --ink: #141210;
  --navy: #2a221a;
  --terracotta: #8a6a3b;
  --terracotta-2: #b89260;
}
body[data-palette="marble"] {
  --parchment: #e9eaec;
  --parchment-2: #d8dadd;
  --vellum: #f2f3f5;
  --ink: #1a1d22;
  --navy: #20242c;
  --terracotta: #1f7a5a;
  --terracotta-2: #2fa37a;
}