/* ---------- tokens ---------- */
:root {
  color-scheme: dark light;
  --paper: #0b1020;
  --paper-2: #0f1730;
  --ink: #e9ecf5;
  --muted: #8590ad;
  --line: #1f2a45;
  --accent: #8290f3;
  --accent-2: #4655d9;
  --card: rgba(255, 255, 255, 0.03);
  --card-hover: rgba(255, 255, 255, 0.055);
  --shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.7);
  --scrim: radial-gradient(60% 60% at 50% 45%, rgba(11, 16, 32, 0.55), rgba(11, 16, 32, 0) 70%);
  --sans: "Inter", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "Cascadia Code", Consolas, monospace;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --col: 1180px;
}
@media (prefers-color-scheme: light) {
  :root {
    --paper: #f5f6fa;
    --paper-2: #ffffff;
    --ink: #111a2e;
    --muted: #6b7490;
    --line: #dfe3ee;
    --accent: #4655d9;
    --accent-2: #3341b8;
    --card: rgba(255, 255, 255, 0.7);
    --card-hover: rgba(255, 255, 255, 1);
    --shadow: 0 30px 60px -30px rgba(17, 26, 46, 0.25);
    --scrim: radial-gradient(60% 60% at 50% 45%, rgba(245, 246, 250, 0.75), rgba(245, 246, 250, 0) 70%);
  }
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3 { margin: 0; letter-spacing: -0.015em; line-height: 1.15; }
p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
.mono { font-family: var(--mono); font-feature-settings: "tnum"; }

/* ---------- canvas ---------- */
#dag {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(80% 60% at 70% 20%, rgba(70, 85, 217, 0.18), transparent 60%),
    radial-gradient(60% 50% at 20% 80%, rgba(130, 144, 243, 0.10), transparent 60%),
    var(--paper);
  transition: opacity 0.2s linear;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  place-items: center;
  padding: 72px 16px 56px;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--scrim);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: var(--col);
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 48px;
  align-items: end;
}
.hero-copy { min-width: 0; }
.eyebrow {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(30px, 4.4vw, 52px);
  font-weight: 700;
  letter-spacing: -0.03em;
  max-width: 18ch;
  text-wrap: balance;
}
.lede {
  margin-top: 20px;
  max-width: 54ch;
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--muted);
  text-wrap: pretty;
}
.lede strong { color: var(--ink); font-weight: 600; }
.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}
.links a {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-weight: 500;
  font-size: 14.5px;
  background: var(--card);
  backdrop-filter: blur(8px);
  transition: border-color 0.2s, background 0.2s, transform 0.3s var(--ease);
}
.links a:hover {
  text-decoration: none;
  border-color: var(--accent);
  background: var(--card-hover);
  transform: translateY(-1px);
}
.links a:first-child { background: var(--accent); border-color: var(--accent); color: #fff; }
.links a:first-child:hover { background: var(--accent-2); border-color: var(--accent-2); }

.lineage-key {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.lineage-key i {
  flex: 0 0 28px;
  height: 1px;
  background: linear-gradient(90deg, var(--line), var(--accent));
  position: relative;
}
.lineage-key i::after {
  content: "";
  position: absolute;
  right: -1px;
  top: -2px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

/* ---------- sections ---------- */
main { position: relative; z-index: 1; }
.section {
  max-width: calc(var(--col) + 32px);
  margin: 0 auto;
  padding: 80px 16px 0;
}
.section-title {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 28px;
}
.section-title .num { color: var(--accent); font-weight: 500; }
.section-intro {
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.3;
  max-width: 34ch;
  text-wrap: pretty;
  margin-bottom: 40px;
}

/* pillars */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
}
.pillar {
  background: var(--paper);
  padding: 26px 22px 28px;
}
.pillar h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 10px;
}
.pillar p { font-size: 15px; color: var(--muted); text-wrap: pretty; }

/* timeline */
.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  perspective: 1200px;
}
@media (max-width: 900px) { .timeline { grid-template-columns: 1fr; } }
.card-meta { display: grid; justify-items: end; gap: 4px; }
.card-link { font-size: 12px; letter-spacing: 0.04em; }
.card {
  --rx: 0deg;
  --ry: 0deg;
  --mx: 50%;
  --my: 50%;
  position: relative;
  padding: 26px 26px 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  transform: rotateX(var(--rx)) rotateY(var(--ry));
  transform-style: preserve-3d;
  transition: transform 0.35s var(--ease), border-color 0.25s, background 0.25s;
  will-change: transform;
}
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(420px circle at var(--mx) var(--my), rgba(130, 144, 243, 0.14), transparent 45%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.card:hover { border-color: rgba(130, 144, 243, 0.45); background: var(--card-hover); }
.card:hover::after { opacity: 1; }
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 14px;
  transform: translateZ(18px);
}
.card h3 { font-size: 21px; font-weight: 600; }
.role { color: var(--muted); font-size: 14.5px; margin-top: 3px; }
.dates { color: var(--muted); font-size: 12.5px; white-space: nowrap; padding-top: 6px; }
.card ul { display: grid; gap: 8px; transform: translateZ(10px); }
.card ul li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  color: var(--ink);
  text-wrap: pretty;
}
.card ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.85;
}

/* earlier roles */
.earlier-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 48px 0 12px;
}
.earlier li {
  display: grid;
  grid-template-columns: 140px 92px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
}
.earlier li:last-child { border-bottom: 1px solid var(--line); }
.earlier .co { font-weight: 600; }
.earlier .when { color: var(--muted); font-size: 12.5px; padding-top: 2px; }
.earlier .what { color: var(--muted); text-wrap: pretty; }

/* toolkit */
.toolkit {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin: 0;
}
.toolkit div {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
}
.toolkit dt {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}
.toolkit dd { margin: 0; font-size: 15px; color: var(--ink); }

/* ---------- footer ---------- */
.footer {
  position: relative;
  z-index: 1;
  margin-top: 96px;
  border-top: 1px solid var(--line);
  padding: 44px 16px 56px;
  background: var(--paper);
}
.footer-inner {
  max-width: var(--col);
  margin: 0 auto;
  display: grid;
  gap: 18px;
  color: var(--muted);
  font-size: 14.5px;
}
.footer .links { margin-top: 0; }
.colophon { font-size: 12px; letter-spacing: 0.04em; }

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1000px) { .toolkit { grid-template-columns: repeat(2, 1fr); } .hero-inner { grid-template-columns: 1fr; gap: 36px; } }
@media (max-width: 760px) {
  .pillars { grid-template-columns: 1fr; }
  .earlier li { grid-template-columns: 1fr; gap: 2px; }
  .earlier .when { order: -1; }
  .toolkit { grid-template-columns: 1fr; }
  .card-head { flex-direction: column; gap: 4px; }
  .card-meta { justify-items: start; }
  .dates { padding-top: 0; }
  .card { padding: 22px 20px; }
  .lineage-key { flex-wrap: wrap; gap: 8px; }
  .lineage-key i { flex-basis: 18px; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .card { transform: none !important; transition: none; }
  .scroll-cue span { animation: none; }
  .links a { transition: none; }
}

/* ---------- project tiles (hero) ---------- */
.projects {
  display: grid;
  gap: 10px;
  min-width: 0;
}
.projects-title {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2px;
}
.tile {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "co cta" "name cta" "sub cta";
  align-items: center;
  column-gap: 16px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  backdrop-filter: blur(10px);
  color: inherit;
  transition: border-color 0.25s, background 0.25s, transform 0.4s var(--ease);
}
.tile:hover, .tile:focus-visible {
  text-decoration: none;
  border-color: var(--accent);
  background: var(--card-hover);
  transform: translateX(4px);
  outline: none;
}
.tile-co { grid-area: co; font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
.tile-name { grid-area: name; font-size: 16.5px; font-weight: 600; letter-spacing: -0.01em; margin-top: 2px; }
.tile-sub { grid-area: sub; font-size: 13px; color: var(--muted); margin-top: 2px; }
.tile-cta { grid-area: cta; font-size: 12px; color: var(--muted); white-space: nowrap; transition: color 0.2s, transform 0.3s var(--ease); }
.tile:hover .tile-cta { color: var(--accent); transform: translateX(3px); }

/* ---------- project sheet (dialog) ---------- */
.sheet {
  width: min(1240px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  max-height: calc(100dvh - 32px);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 40px 100px -30px rgba(0, 0, 0, 0.8);
  overflow: auto;
  overscroll-behavior: contain;
}
.sheet::backdrop { background: rgba(5, 8, 18, 0.7); backdrop-filter: blur(6px); }
.sheet[open] { animation: sheet-in 0.45s var(--ease); }
@keyframes sheet-in { from { opacity: 0; transform: translateY(14px) scale(0.985); } to { opacity: 1; transform: none; } }
.sheet-inner { padding: 26px 28px 28px; display: grid; gap: 16px; outline: none; }
.sheet-head { display: grid; grid-template-columns: 1fr auto auto; gap: 18px; align-items: start; }
.sheet-company { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); }
.sheet-title { font-size: clamp(22px, 2.6vw, 30px); font-weight: 700; letter-spacing: -0.025em; margin-top: 4px; }
.sheet-dates { font-size: 12.5px; color: var(--muted); margin-top: 6px; }
.sheet-switch { display: flex; gap: 6px; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: var(--card); }
.sheet-switch button {
  font: 500 13px/1 var(--sans); color: var(--muted); background: none; border: 0; border-radius: 999px; padding: 8px 12px; cursor: pointer;
  transition: color 0.2s, background 0.2s;
}
.sheet-switch button:hover { color: var(--ink); }
.sheet-switch button.is-active { color: #fff; background: var(--accent); }
.sheet-close {
  width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line); background: var(--card); color: var(--muted); cursor: pointer; font-size: 14px;
  transition: color 0.2s, border-color 0.2s;
}
.sheet-close:hover { color: var(--ink); border-color: var(--accent); }
.sheet-summary { max-width: 78ch; color: var(--muted); font-size: 15px; text-wrap: pretty; }
.sheet-stack { display: flex; flex-wrap: wrap; gap: 6px; }
.sheet-stack span { font: 500 12px/1 var(--mono); padding: 7px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); }
.sheet-body { display: grid; gap: 14px; margin-top: 4px; }
.graph-hint { display: none; font-size: 11.5px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); margin-top: -6px; }
.sheet-graph { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; background: linear-gradient(180deg, var(--card), transparent); padding: 8px; }
.sheet-panel {
  border: 1px solid var(--line); border-radius: 14px; padding: 16px 20px; background: var(--card); min-height: 88px;
  display: grid; grid-template-columns: 260px minmax(0, 1fr) auto; column-gap: 28px; row-gap: 6px; align-items: center;
}
.sheet-panel > .panel-kicker, .sheet-panel > .panel-title { grid-column: 1; }
.sheet-panel > .panel-desc { grid-column: 2; grid-row: 1 / span 2; }
.sheet-panel > .panel-counts, .sheet-panel > .panel-clear { grid-column: 3; justify-self: end; }
.panel-hint { grid-column: 1 / span 2; color: var(--muted); font-size: 14px; }
.panel-legend { grid-column: 3; display: flex; flex-wrap: wrap; gap: 14px; margin: 0; }
.panel-legend div { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); }
.panel-legend dt { width: 10px; height: 10px; border-radius: 50%; background: var(--k); }
.panel-legend dd { margin: 0; }
.panel-kicker { font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); }
.panel-title { font-size: 17px; font-weight: 600; letter-spacing: -0.01em; font-family: var(--mono); }
.panel-desc { font-size: 14px; color: var(--ink); text-wrap: pretty; }
.panel-counts { font-size: 12px; color: var(--muted); }
.panel-counts span { color: var(--ink); font-weight: 500; }
.panel-clear { margin-top: 0; font: 500 12.5px/1 var(--sans); color: var(--muted); background: none; border: 1px solid var(--line); border-radius: 999px; padding: 7px 12px; cursor: pointer; }
.panel-clear:hover { color: var(--ink); border-color: var(--accent); }

/* node kinds */
.kind-source { --k: #6b7490; }
.kind-model { --k: var(--accent); }
.kind-rule { --k: #e0a458; }
.kind-mart { --k: #43c59e; }
.kind-output { --k: #f07a8a; }
.kind-orchestration { --k: #9aa3b8; }

/* ---------- lineage svg ---------- */
.lineage { display: block; width: 100%; height: auto; font-family: var(--mono); }
.lineage .layer-label { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; fill: var(--muted); font-family: var(--mono); }
.lineage .edge {
  fill: none; stroke: var(--line); stroke-width: 1.5;
  stroke-dasharray: 1; stroke-dashoffset: 1;
  transition: stroke 0.3s, opacity 0.3s, stroke-width 0.3s;
}
.lineage .edge-orch { stroke-dasharray: 0.04 0.02; }
.lineage.is-drawn .edge { animation: draw 0.7s var(--ease) forwards; animation-delay: calc(var(--i) * 0.16s + 0.1s); }
@keyframes draw { to { stroke-dashoffset: 0; } }
.lineage .node { cursor: pointer; opacity: 0; }
.lineage.is-drawn .node { animation: pop 0.5s var(--ease) forwards; animation-delay: calc(var(--i) * 0.16s); }
@keyframes pop { from { opacity: 0; } to { opacity: 1; } }
.lineage .node rect { fill: var(--paper); stroke: var(--line); stroke-width: 1.25; transition: stroke 0.25s, fill 0.25s, filter 0.25s; }
.lineage .node .dot { fill: var(--k); }
.lineage .node text { font-size: 12.5px; fill: var(--ink); font-family: var(--mono); }
.lineage .node:hover rect, .lineage .node:focus-visible rect { stroke: var(--k); }
.lineage .node:focus-visible { outline: none; }

/* focus state */
.lineage.has-focus .node.is-dim { opacity: 0.22; }
.lineage.has-focus .edge.is-dim { opacity: 0.18; }
.lineage.has-focus .edge.is-lit {
  stroke: var(--accent); stroke-width: 2;
  stroke-dasharray: 0.06 0.03; stroke-dashoffset: 0;
  animation: flow 1.6s linear infinite;
}
@keyframes flow { to { stroke-dashoffset: -0.36; } }
.lineage .node.is-focus rect { stroke: var(--k); stroke-width: 2; fill: color-mix(in srgb, var(--k) 14%, var(--paper)); filter: drop-shadow(0 0 10px color-mix(in srgb, var(--k) 55%, transparent)); }
.lineage .node.is-up rect { stroke: var(--accent); }
.lineage .node.is-down rect { stroke: #43c59e; }
.lineage.has-focus .node.is-up .dot { fill: var(--accent); }
.lineage.has-focus .node.is-down .dot { fill: #43c59e; }

@media (max-width: 900px) {
  .sheet-panel { grid-template-columns: 1fr; }
  .graph-hint { display: block; }
  .sheet-panel > .panel-kicker, .sheet-panel > .panel-title, .sheet-panel > .panel-desc, .sheet-panel > .panel-counts, .sheet-panel > .panel-clear, .panel-hint, .panel-legend { grid-column: 1; grid-row: auto; justify-self: start; }
  .sheet-head { grid-template-columns: 1fr auto; }
  .sheet-switch { grid-column: 1 / -1; justify-self: start; order: 3; }
  .sheet-inner { padding: 20px 16px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .tile, .tile-cta { transition: none; }
  .sheet[open] { animation: none; }
  .lineage .edge, .lineage.is-drawn .edge { animation: none; stroke-dashoffset: 0; }
  .lineage .node, .lineage.is-drawn .node { animation: none; opacity: 1; }
  .lineage.has-focus .edge.is-lit { animation: none; stroke-dasharray: none; }
}