/* Vriddhi — architecture reference */

:root {
  --paper: #f4f0e8;
  --paper-2: #ece6da;
  --paper-3: #e2dbcc;
  --card: #faf7f1;
  --ink: #1c1b18;
  --ink-2: #4b473f;
  --ink-3: #7b7568;
  --rule: #d9d1c1;
  --rule-strong: #b8ae9a;
  --accent: #b5441b;
  --accent-ink: #8f3413;
  --accent-soft: #f1ddd0;

  --serif: 'Instrument Serif', Georgia, serif;
  --sans: 'Geist', ui-sans-serif, system-ui, sans-serif;
  --mono: 'Geist Mono', ui-monospace, Menlo, Consolas, monospace;

  --ease: cubic-bezier(.2, .7, .2, 1);
  --gutter: clamp(1rem, 4vw, 3rem);
  --max: 1240px;
  --num-col: 5.5rem;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}

/* Paper grain. No blend mode: a blended fixed layer forces a full repaint on every scroll frame. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  transform: translateZ(0);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.08 0 0 0 0 0.05 0 0 0 .07 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3, p, ol, ul, dl, dd, figure { margin: 0; }
a { color: inherit; }
button { font: inherit; color: inherit; }
strong { font-weight: 600; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 1rem;
  z-index: 70;
  background: var(--ink);
  color: var(--paper);
  padding: .5rem .8rem;
  border-radius: 4px;
}
.skip:focus { left: 1rem; }

.eyebrow {
  font: 500 .75rem/1.4 var(--mono);
  color: var(--ink-3);
  letter-spacing: .02em;
}

/* ── Buttons ── */
.btn {
  background: var(--ink);
  color: var(--paper);
  border: 0;
  border-radius: 6px;
  padding: .6rem 1rem;
  font-weight: 500;
  font-size: .88rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color .2s ease, transform .12s ease;
}
.btn:hover { background: var(--accent); }
.btn:active { transform: translateY(1px); }

.btn-text {
  background: none;
  border: 0;
  padding: .4rem .25rem;
  color: var(--ink-2);
  font-size: .88rem;
  cursor: pointer;
  text-underline-offset: 3px;
}
.btn-text:hover { color: var(--ink); text-decoration: underline; }

/* ── Top bar ── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: .8rem var(--gutter);
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}

.wordmark {
  display: flex;
  align-items: baseline;
  gap: .6rem;
  font: 400 1.65rem/1 var(--serif);
  text-decoration: none;
}
.wordmark span { font: 500 .72rem var(--mono); color: var(--ink-3); }

.topnav { display: flex; gap: 1.5rem; margin-right: auto; }
.topnav a {
  font-size: .9rem;
  color: var(--ink-2);
  text-decoration: none;
  text-underline-offset: 4px;
}
.topnav a:hover { color: var(--ink); text-decoration: underline; }

.topbar-actions { display: flex; align-items: center; gap: .75rem; }

/* ── Layout ── */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ── Hero ── */
.hero { padding: clamp(3rem, 9vw, 7rem) 0 0; }

.hero-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 21rem);
  gap: 2rem 4rem;
  align-items: end;
  margin-top: 1.5rem;
}

.hero h1 {
  max-width: 15ch;
  font: 400 clamp(2.9rem, 7.2vw, 6.25rem)/.96 var(--serif);
  letter-spacing: -.02em;
  text-wrap: balance;
}
.hero h1 em { color: var(--accent); }

.hero-foot {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 3rem 4rem;
  align-items: end;
  margin-top: 3rem;
}

.hero-lede {
  max-width: 52ch;
  font-size: 1.08rem;
  color: var(--ink-2);
  text-wrap: pretty;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
}
.stats div {
  display: flex;
  flex-direction: column-reverse;
  justify-content: flex-end;
  gap: .35rem;
  padding: .9rem .75rem 0 0;
}
.stats dt { font-size: .78rem; line-height: 1.3; color: var(--ink-3); }
.stats dd {
  font: 400 clamp(1.8rem, 2.9vw, 3rem)/1 var(--serif);
  font-variant-numeric: tabular-nums;
}
.stats small { font-size: 1.4rem; color: var(--ink-3); }

.pipeline {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: clamp(3rem, 7vw, 5rem);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
}
.pipeline li + li { border-left: 1px solid var(--rule); }
.pipeline a {
  display: grid;
  gap: .15rem;
  height: 100%;
  padding: 1.1rem 1.25rem 1.3rem;
  text-decoration: none;
  transition: background-color .2s ease;
}
.pipeline li:first-child a { padding-left: 0; }
.pipeline a:hover { background: var(--paper-2); }
.pipeline a:hover strong { color: var(--accent); }
.pipeline .n { font: 500 .72rem var(--mono); color: var(--accent); }
.pipeline strong { font-size: 1.05rem; font-weight: 500; transition: color .2s ease; }
.pipeline span:last-child { font-size: .85rem; color: var(--ink-3); }

/* ── Layers ── */
.architecture { margin-top: clamp(4rem, 8vw, 6rem); }

.layer {
  --pad: 1.75rem;
  background: var(--card);
  border: 1px solid var(--rule-strong);
  border-radius: 10px;
  box-shadow: 0 1px 0 var(--rule), 0 14px 34px -26px rgba(60, 45, 20, .45);
  overflow: hidden;
}
.layer-head { font: inherit; transition: background-color .3s ease; }
.layer.expanded .layer-head { background: var(--paper-2); border-bottom: 1px solid var(--rule); }

.layer-toggle {
  width: 100%;
  display: grid;
  grid-template-columns: var(--num-col) minmax(0, 1fr) auto 1.25rem;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem var(--pad);
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
}

.layer-num {
  font: 400 3.5rem/.8 var(--serif);
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
  transition: color .3s ease;
}
.layer.expanded .layer-num,
.layer-toggle:hover .layer-num { color: var(--accent); }

.layer-title {
  display: block;
  font: 400 clamp(1.7rem, 3vw, 2.25rem)/1.05 var(--serif);
  letter-spacing: -.01em;
}
.layer-sub {
  display: block;
  margin-top: .4rem;
  font-size: .92rem;
  color: var(--ink-3);
}

.layer-meta {
  font: 500 .72rem var(--mono);
  color: var(--ink-2);
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  padding: .2rem .5rem;
  white-space: nowrap;
}

.chev {
  width: 10px;
  height: 10px;
  border-right: 1.5px solid var(--ink);
  border-bottom: 1.5px solid var(--ink);
  transform: translateY(-3px) rotate(45deg);
  transition: transform .3s var(--ease);
  justify-self: center;
}
.layer.expanded .chev { transform: translateY(2px) rotate(-135deg); }

/* grid-rows trick: animates to the content's real height, never clips it */
.layer-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .45s var(--ease);
}
.layer.expanded .layer-content { grid-template-rows: 1fr; }
.layer-inner { min-height: 0; overflow: hidden; }
.layer:not(.expanded) .layer-inner { visibility: hidden; transition: visibility 0s .45s; }

.layer-body { padding: 1.75rem var(--pad) 2.75rem calc(var(--pad) + var(--num-col) + 1.25rem); }

.layer-lede {
  max-width: 64ch;
  margin-bottom: 1.25rem;
  font-size: 1.02rem;
  color: var(--ink-2);
  text-wrap: pretty;
}

/* ── Module rows ── */
.module {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 1.25rem 3rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--rule);
  cursor: pointer;
}
.module--plain { grid-template-columns: minmax(0, 1fr); }
.module--plain .module-text { max-width: 62ch; }

.module-kicker { font: 500 .72rem var(--mono); color: var(--ink-3); margin-bottom: .45rem; }

.module h3, .support-item h3 { font: 600 1.15rem/1.3 var(--sans); letter-spacing: -.01em; }
.module h3 button, .support-item h3 button {
  padding: 0;
  background: none;
  border: 0;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: color .2s ease;
}
.module:hover h3 button, .support-item:hover h3 button { color: var(--accent); }

.module-text > p:not(.module-kicker) {
  max-width: 48ch;
  margin: .5rem 0 1rem;
  font-size: .95rem;
  color: var(--ink-2);
}

.more { font: 500 .75rem var(--mono); color: var(--ink); }
.more::after { content: " →"; display: inline-block; transition: transform .2s var(--ease); }
.module:hover .more { color: var(--accent); }
.module:hover .more::after { transform: translateX(3px); }

.module-samples { display: grid; gap: .6rem; align-content: start; min-width: 0; }

/* ── Code / IO blocks (page + drawer) ── */
.code, .io-box {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  border-radius: 4px;
  overflow: hidden;
  min-width: 0;
}

.code > figcaption, .io-box-header {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem .9rem;
  border-bottom: 1px solid var(--rule);
  font: 500 .72rem var(--mono);
  color: var(--ink-2);
}
.code > figcaption::before, .io-box-header::before {
  content: "";
  width: 7px;
  height: 7px;
  flex-shrink: 0;
  background: var(--ink-3);
}
.code[data-kind="input"] > figcaption::before, .io-box-header.input::before {
  background: transparent;
  box-shadow: inset 0 0 0 1.5px var(--ink);
}
.code[data-kind="output"] > figcaption::before, .io-box-header.output::before { background: var(--accent); }

.code pre, .io-box-body {
  padding: .9rem 1rem;
  font: 400 .8rem/1.7 var(--mono);
  color: var(--ink);
  overflow-x: auto;
}
.code pre { margin: 0; white-space: pre; }

.k { color: var(--ink-3); }
.a, .highlight { color: var(--accent); font-weight: 500; }
.c, .dim { color: var(--ink-3); }
.highlight-blue, .highlight-purple, .highlight-green, .highlight-orange { color: var(--ink); font-weight: 600; }

.flow, .flow-arrow {
  padding: .15rem 0 .15rem 1rem;
  font: 400 .75rem var(--mono);
  color: var(--ink-3);
}
.flow::before { content: "↓ "; }

.layer-output { margin-top: 1.75rem; }

/* ── Notices (demo + salary) ── */
.notice {
  padding: .85rem 1rem;
  border: 1px solid var(--rule-strong);
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  background: var(--paper);
  font-size: .82rem;
  line-height: 1.55;
  color: var(--ink-2);
}
.notice strong, .notice-label { color: var(--ink); font-weight: 600; }
.notice-label { margin-bottom: .35rem; font: 500 .72rem var(--mono); color: var(--accent); }
.notice--hero { background: var(--card); font-size: .88rem; }
.notice--layer { margin-top: 2rem; max-width: 80ch; }
.notice--salary { margin: 0 0 1rem; max-width: 48ch; font-size: .78rem; }
.modal-section .notice--salary, .demo-detail .notice--salary { max-width: none; }

/* ── Handoff between layers ── */
.handoff {
  display: grid;
  grid-template-columns: var(--num-col) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: center;
}
.handoff-track {
  position: relative;
  width: 1px;
  height: 64px;
  margin-left: calc(1.75rem + 1.3rem);
  background: repeating-linear-gradient(to bottom, var(--rule-strong) 0 4px, transparent 4px 8px);
}
.handoff-label { font: 400 .75rem var(--mono); color: var(--ink-3); }

.data-packet {
  position: absolute;
  top: 0;
  left: -3px;
  width: 7px;
  height: 7px;
  background: var(--accent);
  opacity: 0;
}
.data-packet.animate { animation: packet 1.2s var(--ease) forwards; }
@keyframes packet {
  0% { opacity: 0; transform: translateY(0); }
  15%, 85% { opacity: 1; }
  100% { opacity: 0; transform: translateY(57px); }
}

/* ── Supporting systems ── */
.subhead {
  margin: 2.75rem 0 .75rem;
  font: 500 .75rem var(--mono);
  color: var(--ink-3);
}

.support {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--rule);
}
.support-item { padding: 1.25rem 1.5rem 1.25rem 0; cursor: pointer; }
.support-item + .support-item { padding-left: 1.5rem; border-left: 1px solid var(--rule); }
.support-item p { margin-top: .4rem; font-size: .9rem; color: var(--ink-2); }

/* ── Charts ── */
.charts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.chart {
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 1.25rem 1.4rem;
}
.chart-title { margin-bottom: 1rem; font-size: .88rem; font-weight: 500; }

.bar-row, .shap-row {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr) 3.75rem;
  align-items: center;
  gap: .75rem;
  padding: .32rem 0;
  font-size: .82rem;
  color: var(--ink-2);
}

.bar-track { height: 8px; background: var(--paper-3); overflow: hidden; }
.bar-fill { display: block; height: 100%; width: var(--w); background: var(--ink); }
.bar-row[data-trend="up"] .bar-fill { background: var(--accent); }
.bar-row[data-trend="down"] .bar-fill {
  background: repeating-linear-gradient(135deg, var(--ink-3) 0 2px, transparent 2px 5px);
  box-shadow: inset 0 0 0 1px var(--ink-3);
}

.bar-value {
  font: 500 .75rem var(--mono);
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--ink);
}
.bar-row[data-trend="up"] .bar-value, .shap-row.pos .bar-value { color: var(--accent); }

.shap-track { position: relative; height: 10px; }
.shap-track::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -5px;
  bottom: -5px;
  width: 1px;
  background: var(--ink-3);
}
.shap-bar { position: absolute; top: 0; height: 100%; width: var(--w); }
.shap-row.pos .shap-bar { left: 50%; background: var(--accent); }
.shap-row.neg .shap-bar { right: 50%; background: var(--ink-3); }

.legend, .kg-legend {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.25rem;
  margin-top: 1rem;
  font: 400 .72rem var(--mono);
  color: var(--ink-3);
}
.legend i, .kg-legend i {
  display: inline-block;
  width: 12px;
  height: 8px;
  margin-right: .4rem;
  vertical-align: middle;
  background: var(--ink);
}
.legend i.up { background: var(--accent); }
.legend i.down { background: repeating-linear-gradient(135deg, var(--ink-3) 0 2px, transparent 2px 5px); box-shadow: inset 0 0 0 1px var(--ink-3); }

.axis-note { margin-top: .9rem; text-align: center; font: 400 .72rem var(--mono); color: var(--ink-3); }

/* ── Agent steps + chat ── */
.agent-steps { list-style: none; padding: 0; font-size: .88rem; color: var(--ink-2); }
.agent-steps li {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: .75rem;
  padding: .5rem 0;
  border-top: 1px dashed var(--rule-strong);
}
.agent-steps li:first-child { border-top: 0; padding-top: 0; }
.agent-steps span { font: 500 .72rem/1.9 var(--mono); color: var(--accent); }

.chat {
  margin-top: .6rem;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
}
.chat-head { padding: .55rem 1rem; border-bottom: 1px solid var(--rule); font: 500 .72rem var(--mono); color: var(--ink-3); }

.msg {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: .75rem;
  padding: .95rem 1rem;
  font-size: .9rem;
}
.msg + .msg { border-top: 1px dashed var(--rule); }
.msg.user { background: var(--paper-2); }
.who { font: 500 .72rem/1.9 var(--mono); color: var(--ink-3); }
.msg.bot .who { color: var(--accent); }
.msg p + p, .msg p + ol, .msg ol + p { margin-top: .6rem; }
.source { font: 400 .72rem var(--mono); color: var(--ink-3); }

.gap-list { padding-left: 1.2rem; display: grid; gap: .35rem; font-size: .88rem; }
.gap-list li::marker { font: 500 .75rem var(--mono); color: var(--ink-3); }

/* ── Skill tags ── */
.skill-tags { display: flex; flex-wrap: wrap; gap: .35rem; }
.skill-tag {
  display: inline-block;
  padding: .1rem .45rem;
  border: 1px solid var(--rule-strong);
  border-radius: 3px;
  background: var(--card);
  font: 500 .75rem/1.5 var(--mono);
  color: var(--ink);
}
.skill-tag.matched { border-color: var(--ink); }
.skill-tag.missing { border-color: var(--accent); background: var(--accent-soft); color: var(--accent-ink); }
.skill-tag.neutral { background: var(--paper-3); border-color: var(--paper-3); color: var(--ink-2); }

/* ── Section heads (demo, graph) ── */
.demo, .graph { margin-top: clamp(4.5rem, 9vw, 7rem); }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem 4rem;
  align-items: end;
  padding-top: 1.5rem;
  border-top: 1px solid var(--ink);
}
.section-head h2 {
  margin-top: .6rem;
  font: 400 clamp(2rem, 4.2vw, 3.2rem)/1.02 var(--serif);
  letter-spacing: -.015em;
  text-wrap: balance;
}
.section-head > p { max-width: 50ch; color: var(--ink-2); }

/* ── Demo ── */
.demo-form {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, .8fr) minmax(0, 1.2fr) minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: end;
  margin-top: 2rem;
  padding: 1.25rem;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
}
.demo-form label > span { display: block; margin-bottom: .35rem; font: 500 .72rem var(--mono); color: var(--ink-3); }
.demo-form input, .demo-form select {
  width: 100%;
  padding: .6rem .7rem;
  background: var(--paper);
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  font: 400 .95rem var(--sans);
  color: var(--ink);
  transition: border-color .2s ease;
}
.demo-form input:focus, .demo-form select:focus { outline: none; border-color: var(--ink); box-shadow: 0 0 0 2px var(--accent-soft); }
.demo-form .btn { padding: .68rem 1.1rem; }

.demo-steps { list-style: none; padding: 0; margin-top: 2rem; }
.demo-empty { padding: 1.25rem 0; border-top: 1px solid var(--rule); color: var(--ink-3); font-style: italic; }

/* Each step is its own card; a line joins the step numbers */
.demo-step {
  position: relative;
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: 1rem;
  padding-bottom: 1.25rem;
  opacity: .25;
  transform: translateY(8px);
  transition: opacity .45s ease, transform .45s var(--ease);
}
.demo-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 1.1rem;
  top: 2.9rem;
  bottom: .4rem;
  width: 1px;
  background: var(--rule-strong);
}
.demo-step.active { opacity: 1; transform: none; }
.demo-num { padding-top: 1.1rem; font: 400 2rem/1 var(--serif); color: var(--ink-3); transition: color .3s ease; }
.demo-step.active .demo-num { color: var(--accent); }

.demo-card {
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 1.2rem 1.5rem 1.4rem;
  box-shadow: 0 1px 0 var(--rule), 0 8px 24px -18px rgba(60, 45, 20, .35);
}
.demo-step h3 {
  padding-bottom: .85rem;
  border-bottom: 1px dashed var(--rule-strong);
  font: 600 1.1rem/1.3 var(--sans);
}
.demo-step h3 small {
  display: table;  /* own line, shrink-wrapped */
  margin: 0 0 .45rem;
  padding: .12rem .45rem;
  border-radius: 3px;
  background: var(--paper-2);
  font: 500 .7rem var(--mono);
  color: var(--ink-2);
}
.demo-detail { margin-top: 1rem; max-width: 76ch; font-size: .95rem; color: var(--ink-2); }

.demo-table { width: 100%; border-collapse: collapse; font-size: .88rem; font-variant-numeric: tabular-nums; }
.demo-table th {
  padding: 0 .75rem .45rem 0;
  text-align: left;
  font: 500 .7rem var(--mono);
  color: var(--ink-3);
  border-bottom: 1px solid var(--rule);
}
.demo-table td { padding: .55rem .75rem .55rem 0; border-bottom: 1px solid var(--rule); color: var(--ink); white-space: nowrap; }
.demo-table td:first-child { white-space: normal; }
.demo-table tr.is-target td { background: var(--paper-2); }
.demo-table tr.is-target td:first-child { box-shadow: inset 2px 0 0 var(--accent); padding-left: .6rem; }
.demo-table small { font: 500 .68rem var(--mono); color: var(--accent); margin-left: .3rem; }
.meter { display: inline-block; width: 64px; height: 6px; margin-right: .6rem; vertical-align: middle; background: var(--paper-3); }
.meter span { display: block; height: 100%; width: var(--w); background: var(--accent); }

.range-compare { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr)); gap: 1rem; }
.range-compare > div { padding: .9rem 1rem; border: 1px solid var(--rule); border-radius: 6px; background: var(--paper); }
.range-compare > div + div { border-color: var(--accent); background: var(--accent-soft); }
.range-compare .k { font: 500 .7rem var(--mono); }
.range-compare .big-num { margin: .35rem 0 .25rem; font-size: 2.1rem; }
.range-compare small { font-size: .8rem; color: var(--ink-3); }
.note { font-size: .82rem; color: var(--ink-3); }
.verdict { padding: .8rem 1rem; border-left: 2px solid var(--accent); background: var(--paper-2); color: var(--ink); }
.demo-detail > * + * { margin-top: .75rem; }
.demo-detail .chat { max-width: 640px; }
.big-num { font: 400 3.5rem/1 var(--serif); color: var(--ink); font-variant-numeric: tabular-nums; }
.big-num small { font: 500 .8rem var(--sans); color: var(--ink-3); margin-left: .5rem; }
.trend-lines { display: grid; gap: .5rem; }
.trend-lines > div { display: flex; flex-wrap: wrap; align-items: center; gap: .35rem; }
.trend-lines .k { width: 5.5rem; font: 500 .72rem var(--mono); }

/* ── Knowledge graph ── */
.kg-wrap {
  margin-top: 2rem;
  overflow-x: auto;
  background: var(--card);
  border: 1px solid var(--rule);
  border-radius: 8px;
}
.kg-container { position: relative; min-width: 760px; height: 440px; }
.kg-svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.kg-svg line { stroke: var(--rule-strong); stroke-width: 1; transition: stroke .2s ease, opacity .2s ease; }
.kg-container.is-focused line { opacity: .18; }
.kg-container.is-focused line.on { opacity: 1; stroke: var(--accent); stroke-width: 1.75; }

.kg-node {
  position: absolute;
  transform: translate(-50%, -50%);
  padding: .3rem .65rem;
  border: 1px solid;
  border-radius: 4px;
  font: 500 .78rem/1.2 var(--sans);
  white-space: nowrap;
  cursor: default;
  transition: opacity .2s ease;
}
.kg-node.role, .kg-legend .role { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.kg-node.skill, .kg-legend .skill { background: var(--card); color: var(--ink); border-color: var(--rule-strong); }
.kg-node.sector, .kg-legend .sector { background: var(--accent-soft); color: var(--accent-ink); border-color: var(--accent); }
.kg-legend i { border: 1px solid; }
.kg-container.is-focused .kg-node:not(.linked) { opacity: .3; }

/* ── Footer ── */
.footer {
  max-width: var(--max);
  margin: clamp(4rem, 8vw, 6rem) auto 0;
  padding: 1.5rem var(--gutter) 2.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font: 400 .75rem var(--mono);
  color: var(--ink-3);
  border-top: 1px solid var(--ink);
}
.footer-disclaimer { flex-basis: 100%; max-width: 90ch; margin-bottom: .5rem; font: 400 .78rem/1.6 var(--sans); color: var(--ink-3); }
.footer-disclaimer strong { color: var(--ink-2); }

/* ── Detail drawer ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(28, 27, 24, .32);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s ease, visibility 0s .3s;
}
.modal-overlay.active { opacity: 1; visibility: visible; transition: opacity .3s ease; }

.modal {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(680px, 100%);
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--paper);
  border-left: 1px solid var(--ink);
  transform: translateX(100%);
  transition: transform .4s var(--ease);
}
.modal-overlay.active .modal { transform: none; }

.modal-header {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.5rem 2rem 1.25rem;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.modal-title { font: 400 clamp(1.6rem, 4vw, 2.1rem)/1.1 var(--serif); letter-spacing: -.01em; }
.modal-close {
  flex-shrink: 0;
  padding: .35rem .75rem;
  background: none;
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  font-size: .85rem;
  cursor: pointer;
  transition: border-color .2s ease;
}
.modal-close:hover { border-color: var(--ink); }

.modal-body { padding: .5rem 2rem 3rem; }
.modal-section { padding: 1.5rem 0; }
.modal-section + .modal-section { border-top: 1px solid var(--rule); }
.modal-section h3 { margin-bottom: .75rem; font: 600 1rem/1.3 var(--sans); }
.modal-section p { max-width: 62ch; line-height: 1.65; color: var(--ink-2); }
.modal-section .io-box + .io-box, .modal-section .io-box + .flow-arrow, .modal-section .flow-arrow + .io-box { margin-top: .5rem; }
.modal-section .chart { margin-top: .25rem; }

.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }

/* ── Responsive ── */
@media (max-width: 960px) {
  .hero-foot, .section-head, .hero-top { grid-template-columns: minmax(0, 1fr); }
  .module { grid-template-columns: minmax(0, 1fr); }
  .charts { grid-template-columns: minmax(0, 1fr); }
  .support { grid-template-columns: minmax(0, 1fr); }
  .support-item + .support-item { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); }
  .layer-body { padding-left: var(--pad); }
  .demo-form { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .demo-form label:first-child { grid-column: 1 / -1; }
  .topnav { display: none; }
  .topbar-actions { margin-left: auto; }
}

@media (max-width: 600px) {
  :root { --num-col: 2.75rem; }
  .topbar { gap: 1rem; }
  .wordmark span, .btn-text { display: none; }
  .stats, .pipeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pipeline li:nth-child(3) { border-left: 0; }
  .pipeline li:nth-child(3) a { padding-left: 0; }
  .pipeline li:nth-child(n+3) { border-top: 1px solid var(--rule); }
  .layer-toggle { grid-template-columns: var(--num-col) minmax(0, 1fr) 1rem; gap: .9rem; }
  .layer-num { font-size: 2.4rem; }
  .layer-meta { display: none; }
  .layer { --pad: 1rem; }
  .handoff-track { margin-left: calc(1rem + .9rem); }
  .demo-form { grid-template-columns: minmax(0, 1fr); }
  .msg, .agent-steps li { grid-template-columns: minmax(0, 1fr); gap: .15rem; }
  .bar-row, .shap-row { grid-template-columns: 6rem minmax(0, 1fr) 3.5rem; }
  .demo-step { grid-template-columns: 2.25rem minmax(0, 1fr); gap: .6rem; }
  .demo-step:not(:last-child)::before { left: .7rem; }
  .demo-num { font-size: 1.5rem; }
  .demo-card { padding: 1rem 1rem 1.15rem; }
  .demo-table { font-size: .8rem; }
  .demo-table td { white-space: normal; }
  .meter { display: none; }
  .big-num small { display: block; margin: .4rem 0 0; line-height: 1.4; }
  .modal-header { padding: 1.1rem 1.25rem 1rem; }
  .modal-body { padding: .25rem 1.25rem 2.5rem; }
}

/* Lenis smooth scroll */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}