/*
 * Think.dev production stylesheet.
 *
 * Lineage: the V3 concept system (concepts-top/shared-v3.css) for the field,
 * type, and signature artifacts, plus the component vocabulary that shipped on
 * similar.dev (pill buttons, code window, stat rows, spec rows, catalog cards,
 * commitment cards, final CTA). Layouts are deliberately dense: every section
 * pairs copy with a visual object so no viewport reads as empty.
 *
 * The primary accent is the teal of the mark's center ring. Amber and rose
 * are supporting accents used inside code highlighting, badges, and the
 * agency-loop artifact.
 */

:root {
  --black: #000000;
  --ink: #f3f1ea;
  --muted: #a3a69f;
  --dim: #63665f;
  --line: rgba(243, 241, 234, 0.12);
  --line-strong: rgba(243, 241, 234, 0.24);
  --panel: #0a0b0b;
  --panel-2: #0f1111;
  --accent: #56fef4;
  --accent-deep: #1fbfb8;
  --accent-2: #ffb547;
  --accent-3: #ff4fa3;
  --accent-4: #a78bfa;
  --page: 1200px;
  --serif: "Iowan Old Style", "Baskerville", "Georgia", serif;
  --sans: "Helvetica Neue", "Inter", "Arial", sans-serif;
  --mono: "SFMono-Regular", "SF Mono", "Menlo", "Roboto Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(ellipse 70% 45% at 85% -5%, rgba(86, 254, 244, 0.13), transparent 60%),
    radial-gradient(ellipse 55% 40% at 5% 30%, rgba(255, 181, 71, 0.06), transparent 60%),
    var(--black);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
img, svg { display: block; max-width: 100%; }
p, h1, h2, h3, h4 { margin-top: 0; }
p { line-height: 1.7; color: var(--muted); }
p strong { color: var(--ink); font-weight: 500; }
code { font-family: var(--mono); font-size: 0.92em; color: var(--accent); }
h1, h2, h3 { letter-spacing: -0.02em; }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--black);
  transform: translateY(-180%);
}

.skip-link:focus { transform: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.shell {
  width: min(calc(100% - 40px), var(--page));
  margin-inline: auto;
}

.eyebrow {
  margin-bottom: 14px;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow.is-accent { color: var(--accent); }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.84);
  backdrop-filter: blur(12px);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.brand-mark { display: inline-block; flex: none; width: 34px; height: 34px; color: var(--ink); }
.brand-dot { color: var(--accent); }

.primary-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.primary-nav a {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.primary-nav a:hover,
.primary-nav a[aria-current="page"] { color: var(--ink); }

.header-cta { display: flex; gap: 10px; align-items: center; }

.menu-button {
  display: none;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 18px;
  height: 1px;
  margin: 4px 0;
  background: var(--ink);
}

/* Buttons ----------------------------------------------------------------- */

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover { transform: translateY(-1px); }
.button-primary { color: #041413; background: var(--accent); }
.button-outline { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.button-outline:hover { border-color: var(--accent); }
.button-quiet { border-color: var(--line); color: var(--muted); background: rgba(255, 255, 255, 0.03); }
.button-full { width: 100%; }
.button:disabled { opacity: 0.6; cursor: wait; transform: none; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; }

.install {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-height: 44px;
  padding: 0 8px 0 16px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.02);
}

.install span::before { content: "$ "; color: var(--dim); }

.install button {
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

.install button:hover { color: var(--accent); border-color: var(--accent); }

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

.hero { padding: 56px 0 64px; }

.hero-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 44px;
  align-items: center;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(40px, 5.2vw, 66px);
  font-weight: 400;
  line-height: 1.02;
  letter-spacing: -0.025em;
}

.hero h1 em { color: var(--accent); font-style: italic; }

.hero-lede {
  max-width: 56ch;
  margin: 18px 0 24px;
  font-size: 17px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.hero-stats div strong { display: block; font-size: 24px; color: var(--ink); }
.hero-stats div strong small { margin-left: 2px; color: var(--accent); font-size: 13px; }

.hero-stats div span {
  display: block;
  margin-top: 2px;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.35;
  text-transform: uppercase;
}

/* Grid children default to min-width:auto, which lets a wide <pre> stretch
   the column past the viewport on phones. Reset so overflow stays inside. */
.hero-grid > *, .two-col > *, .grid-3 > *, .grid-2 > *, .final-cta > *, .bio-grid > *, .contact-grid > * { min-width: 0; }

/* Code window with typewriter ------------------------------------------- */

.code-window {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #050707;
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(86, 254, 244, 0.08);
}

.code-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--dim);
  font-family: var(--mono);
  font-size: 11px;
}

.code-head i { width: 9px; height: 9px; border-radius: 50%; background: var(--line-strong); }
.code-head i:first-child { background: var(--accent); }
.code-head i:nth-child(3) { background: var(--accent-2); }
.code-head span { margin-left: 8px; }

.code-head .copy {
  margin-left: auto;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  cursor: pointer;
}

.code {
  margin: 0;
  padding: 20px 22px;
  overflow-x: auto;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.75;
  white-space: pre;
  max-width: 100%;
}

.code.is-tall { min-height: 520px; }
.code .k { color: var(--accent-3); }
.code .f { color: var(--accent); }
.code .s { color: var(--accent-2); }
.code .c { color: var(--dim); }
.code .caret { color: var(--accent); animation: blink 1s steps(2) infinite; }

@keyframes blink { to { opacity: 0; } }

.event-log {
  padding: 12px 22px 16px;
  border-top: 1px solid var(--line);
  background: var(--panel);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.9;
  color: var(--muted);
}

.event-log div { transition: opacity 300ms ease; }
.event-log b { margin-right: 8px; color: var(--accent); font-weight: 600; }

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

.section { padding: 72px 0; border-top: 1px solid var(--line); }
.section.is-tight { padding: 48px 0; }

.section-head { max-width: 760px; margin-bottom: 32px; }

.section-head h2 {
  font-family: var(--serif);
  font-size: clamp(30px, 3.6vw, 44px);
  font-weight: 400;
  line-height: 1.08;
  margin-bottom: 14px;
}

.section-head p { font-size: 16.5px; }

h2.serif {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(28px, 3.4vw, 40px);
  line-height: 1.1;
  margin-bottom: 14px;
}

h3.serif {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.4rem;
  line-height: 1.25;
  margin-bottom: 10px;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.two-col.is-top { align-items: start; }
.two-col.is-wide-left { grid-template-columns: 1.15fr 0.85fr; }
.two-col.is-wide-right { grid-template-columns: 0.85fr 1.15fr; }

.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }

.panel {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
}

.panel.is-pad { padding: 24px; }

.pull {
  font-family: var(--serif);
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  line-height: 1.3;
  color: var(--ink);
  padding-left: 22px;
  border-left: 2px solid var(--accent);
  margin: 0 0 18px;
}

/* Statement cards ---------------------------------------------------------- */

.statements {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

.statements.cols-3 { grid-template-columns: repeat(3, 1fr); }
.statements.cols-2 { grid-template-columns: repeat(2, 1fr); }

.statement { padding: 28px; background: var(--panel); }

.statement .num {
  display: block;
  margin-bottom: 12px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.statement h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.3rem;
  line-height: 1.25;
  margin-bottom: 10px;
}

.statement p { font-size: 14.5px; margin: 0; }

/* Catalog cards (programs, systems) ---------------------------------------- */

.catalog { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.catalog.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.catalog.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border-color: color-mix(in srgb, var(--card-accent, var(--accent)) 45%, var(--line));
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--card-accent, var(--accent)) 9%, transparent), transparent 55%),
    var(--panel);
}

.card .kicker {
  display: flex;
  justify-content: space-between;
  color: var(--card-accent, var(--accent));
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.card h3 {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card h3.mono { font-family: var(--mono); font-size: 15px; letter-spacing: 0; overflow-wrap: anywhere; }
.card p { flex: 1; margin-bottom: 14px; font-size: 14px; }
.card .card-link { color: var(--card-accent, var(--accent)); font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; }

.spec-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.spec-row.cols-4 { grid-template-columns: repeat(4, 1fr); }
.spec-row span { display: block; color: var(--dim); font-family: var(--mono); font-size: 10px; text-transform: uppercase; }
.spec-row strong { font-size: 12.5px; }

/* Primitive tiles ---------------------------------------------------------- */

.prims { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 8px; }

.prim {
  padding: 14px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  transition: border-color 200ms, transform 200ms;
}

.prim:hover { border-color: var(--accent); transform: translateY(-2px); }
.prim b { display: block; font-family: var(--mono); font-size: 12px; color: var(--ink); margin-bottom: 5px; }
.prim span { display: block; font-size: 12px; line-height: 1.4; color: var(--dim); }
.prim.is-core { border-color: color-mix(in srgb, var(--accent) 55%, var(--line)); }

/* Decision trace ---------------------------------------------------------- */

.trace {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #050707;
  font-family: var(--mono);
  font-size: 12.5px;
}

.trace-head {
  display: flex;
  justify-content: space-between;
  padding: 11px 18px;
  border-bottom: 1px solid var(--line);
  color: var(--dim);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.trace-row {
  display: grid;
  grid-template-columns: 22px 92px 1fr;
  gap: 12px;
  align-items: start;
  padding: 11px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--dim);
  transition: background 300ms, color 300ms;
}

.trace-row:last-child { border-bottom: none; }
.trace-row i { width: 8px; height: 8px; margin-top: 6px; border-radius: 50%; background: var(--dim); justify-self: center; }
.trace-row b { font-weight: 500; color: var(--muted); }
.trace-row.is-active { background: rgba(255, 255, 255, 0.03); color: var(--ink); }
.trace-row.is-active i { background: var(--accent); animation: pulse-ring 1.2s ease-out infinite; }
.trace-row.is-active b { color: var(--accent); }
.trace-row.is-done { color: var(--muted); }
.trace-row.is-done i { background: var(--accent); opacity: 0.55; }

@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(86, 254, 244, 0.55); }
  100% { box-shadow: 0 0 0 14px transparent; }
}

/* Agency loop ------------------------------------------------------------- */

.loop { position: relative; width: min(100%, 400px); aspect-ratio: 1; margin-inline: auto; }
.loop svg { width: 100%; height: 100%; overflow: visible; }
.loop .orbit { fill: none; stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 4 6; }

.loop .sweep {
  fill: none;
  stroke: var(--accent-2);
  stroke-width: 2;
  stroke-linecap: round;
  transform-box: view-box;
  transform-origin: 200px 200px;
  animation: rotate 14s linear infinite;
}

.loop-node {
  position: absolute;
  transform: translate(-50%, -50%);
  padding: 6px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--black);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  transition: color 300ms, border-color 300ms, box-shadow 300ms, background 300ms;
}

.loop-node.is-active {
  color: #1a1200;
  background: var(--accent-2);
  border-color: var(--accent-2);
  box-shadow: 0 0 24px rgba(255, 181, 71, 0.5);
}

.loop-core { position: absolute; left: 50%; top: 50%; width: 30%; transform: translate(-50%, -50%); color: var(--ink); }

@keyframes rotate { to { transform: rotate(360deg); } }

/* Version lineage --------------------------------------------------------- */

.lineage { display: grid; grid-template-columns: repeat(27, 1fr); gap: 4px; margin: 18px 0 10px; }

.lineage span {
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.02);
  transition: background 400ms, border-color 400ms;
}

.lineage span.is-active { background: var(--accent-2); border-color: var(--accent-2); }
.lineage span.is-past { background: rgba(255, 181, 71, 0.22); }
.lineage-caption { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 10.5px; color: var(--dim); letter-spacing: 0.08em; }

/* Receipt ledger ---------------------------------------------------------- */

.ledger {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  background: #050707;
  font-family: var(--mono);
  font-size: 12px;
}

.ledger-row {
  display: grid;
  grid-template-columns: 78px 1fr auto;
  gap: 14px;
  padding: 11px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--muted);
  animation: ledger-in 500ms ease both;
}

.ledger-row .status { font-weight: 600; }
.ledger-row .status.ok { color: var(--accent); }
.ledger-row .status.blocked { color: var(--accent-3); }
.ledger-row .status.rest { color: var(--accent-2); }
.ledger-row .when { color: var(--dim); }

@keyframes ledger-in {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: none; }
}

/* Effects equation (CGEM) ------------------------------------------------- */

.equation {
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.9;
  overflow-x: auto;
  white-space: nowrap;
}

.equation .t { color: var(--accent-2); }
.equation .m { color: var(--accent); }
.equation .o { color: var(--dim); }

.outcomes { display: grid; gap: 10px; }

.outcome {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel-2);
}

.outcome b { color: var(--accent); font-family: var(--mono); font-size: 12px; }
.outcome strong { display: block; margin-bottom: 3px; font-size: 14px; }
.outcome p { margin: 0; font-size: 13px; }

/* Evidence panel ---------------------------------------------------------- */

.evidence {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 28px;
  align-items: start;
  padding: 28px;
  border-style: dashed;
}

.evidence h3 { margin: 8px 0; font-size: 22px; letter-spacing: -0.01em; }

.badge {
  display: inline-block;
  margin-bottom: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 181, 71, 0.2);
  color: var(--accent-2);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.badge.is-live { background: rgba(86, 254, 244, 0.16); color: var(--accent); }

.score-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }

.score { padding: 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel-2); }
.score span { display: block; color: var(--dim); font-family: var(--mono); font-size: 10px; text-transform: uppercase; }
.score strong { display: block; margin-top: 6px; color: var(--accent-2); font-family: var(--mono); font-size: 15px; }
.score strong small { color: var(--dim); font-size: 10px; margin-left: 4px; }

/* Commitment cards --------------------------------------------------------- */

.commit { padding: 24px; }
.commit .big { display: block; margin-bottom: 8px; font-family: var(--serif); font-size: 40px; line-height: 1; }
.commit h3 { margin-bottom: 8px; font-size: 17px; }
.commit p { font-size: 14px; margin: 0; }

/* Bio ---------------------------------------------------------------------- */

.bio-grid {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 40px;
  align-items: start;
}

.portrait {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.6);
}

.portrait img { width: 100%; height: auto; display: block; }

.portrait::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.55));
  pointer-events: none;
}

.portrait figcaption {
  position: absolute;
  left: 18px;
  bottom: 16px;
  z-index: 1;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
}

.bio-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }

/* Contact form ------------------------------------------------------------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: start;
}

.field { margin-bottom: 16px; }

.field label {
  display: block;
  margin-bottom: 6px;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #050707;
  color: var(--ink);
}

.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--accent); outline: none; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field-hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }

.form-status {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 14px;
  color: var(--muted);
}

.form-status.is-ok { border-color: var(--accent); color: var(--ink); }
.form-status.is-error { border-color: var(--accent-3); color: var(--ink); }
.form-status[hidden] { display: none; }

/* Final CTA ----------------------------------------------------------------- */

.final-cta {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: center;
  padding: 36px;
  background:
    linear-gradient(120deg, rgba(86, 254, 244, 0.12), rgba(255, 181, 71, 0.06)),
    var(--panel);
}

.final-cta h2 { font-family: var(--serif); font-size: clamp(28px, 3.4vw, 40px); font-weight: 400; }

.steps { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; counter-reset: s; }
.steps li { display: flex; gap: 12px; align-items: baseline; color: var(--muted); font-size: 14px; }
.steps li::before { counter-increment: s; content: counter(s, decimal-leading-zero); color: var(--accent); font-family: var(--mono); font-size: 11px; }

/* Essay layout (philosophy page) ------------------------------------------ */

.essay { display: grid; grid-template-columns: 220px 1fr; gap: 56px; align-items: start; padding: 40px 0 80px; }

.toc {
  position: sticky;
  top: 84px;
  display: grid;
  gap: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--dim);
}

.toc a { padding-left: 14px; border-left: 1px solid var(--line); transition: color 200ms, border-color 200ms; }
.toc a.is-current { color: var(--accent); border-color: var(--accent); }

.essay-body section { padding: 36px 0 48px; border-bottom: 1px solid var(--line); }
.essay-body section:last-child { border-bottom: none; }

.essay-body h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  line-height: 1.14;
  margin: 0 0 18px;
}

.essay-body h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: 1.35rem;
  line-height: 1.28;
  margin: 30px 0 10px;
}

.essay-body p { font-size: 1.02rem; max-width: 68ch; }
.essay-body .pull { margin: 30px 0; }

.essay-hero { padding: 88px 0 56px; }
.essay-hero h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(2.6rem, 6vw, 5rem); line-height: 1.02; letter-spacing: -0.02em; max-width: 15ch; margin-bottom: 20px; }
.essay-hero .hero-lede { font-size: 1.15rem; max-width: 60ch; }

.aside-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin: 28px 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.aside-pair p { font-size: 15px; margin: 0; }
.aside-pair b { display: block; font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }

/* Footer --------------------------------------------------------------------- */

.site-footer { padding: 44px 0 36px; border-top: 1px solid var(--line); color: var(--dim); font-size: 13px; }

.footer-row { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
.footer-row h4 { font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--dim); margin-bottom: 12px; }
.footer-row a { display: block; color: var(--muted); margin-bottom: 8px; }
.footer-row a.brand { display: inline-flex; color: var(--ink); margin-bottom: 0; }
.footer-row a:hover { color: var(--ink); }
.footer-row p { font-size: 13px; }
.footer-legal { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-top: 32px; padding-top: 18px; border-top: 1px solid var(--line); }

/* Reveal ---------------------------------------------------------------------- */

[data-reveal] { opacity: 1; transform: none; }
.is-ready [data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity 600ms ease, transform 600ms cubic-bezier(0.16, 1, 0.3, 1); }
.is-ready [data-reveal].is-visible { opacity: 1; transform: none; }

/* Animated mark ---------------------------------------------------------------- */

.think-logo { width: 100%; height: 100%; overflow: visible; display: block; }

.mark-geometry {
  transform-box: fill-box;
  transform-origin: center;
  animation: mark-arrives 900ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.mark-ring {
  transform-box: fill-box;
  transform-origin: center;
  filter: drop-shadow(0 0 10px rgba(86, 254, 244, 0.45));
  animation: ring-arrives 700ms 350ms cubic-bezier(0.16, 1, 0.3, 1) both, ring-breathes 6s 1.2s ease-in-out infinite alternate;
}

@keyframes mark-arrives { from { opacity: 0; transform: scale(0.92); } to { opacity: 1; transform: scale(1); } }
@keyframes ring-arrives { from { opacity: 0; transform: scale(0.3); } to { opacity: 1; transform: scale(1); } }
@keyframes ring-breathes { from { transform: scale(1); } to { transform: scale(1.08); } }

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

@media (max-width: 960px) {
  .hero { padding: 40px 0 48px; }

  .hero-grid, .two-col, .two-col.is-wide-left, .two-col.is-wide-right,
  .grid-3, .grid-2, .catalog, .catalog.cols-2, .catalog.cols-4,
  .statements.cols-3, .statements.cols-2, .evidence, .final-cta,
  .bio-grid, .contact-grid, .essay, .aside-pair, .field-row {
    grid-template-columns: 1fr;
  }

  .prims { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lineage { grid-template-columns: repeat(9, 1fr); }
  .lineage span { height: 24px; }
  .footer-row { grid-template-columns: 1fr 1fr; }
  .toc { position: static; display: none; }
  .code { font-size: 12px; }
  .code.is-tall { min-height: 0; }
  .section { padding: 52px 0; }

  .menu-button { display: block; }

  .primary-nav {
    display: none;
    position: absolute;
    top: 58px;
    right: 20px;
    left: 20px;
    flex-direction: column;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #050505;
  }

  .primary-nav.open { display: flex; }
  .header-cta .button-quiet { display: none; }
  .header-cta .button-primary { min-height: 38px; padding: 0 14px; font-size: 12px; white-space: nowrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .mark-geometry, .mark-ring { opacity: 1 !important; transform: none !important; }
  .is-ready [data-reveal] { opacity: 1; transform: none; }
}