/* Portfolio site — neon-on-midnight, matching the showcase reel. */
:root {
  --bg: #07061a;
  --bg-2: #120a2e;
  --panel: rgba(22, 18, 50, 0.78);
  --panel-solid: #161232;
  --line: rgba(255, 255, 255, 0.09);
  --line-2: rgba(255, 255, 255, 0.16);
  --ink: #f4f3ff;
  --ink-2: #d6d6e8;
  --ink-3: #9d9cbc;
  --pink: #ff3d8b;
  --cyan: #36e3ff;
  --gold: #ffc93d;
  --c1: var(--pink);
  --c2: var(--cyan);
  --radius: 18px;
  --maxw: 1240px;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  background-image:
    radial-gradient(900px 600px at 85% -5%, color-mix(in srgb, var(--c1) 16%, transparent), transparent 70%),
    radial-gradient(800px 600px at 0% 105%, color-mix(in srgb, var(--c2) 10%, transparent), transparent 70%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 900px);
  background-repeat: no-repeat;
  background-color: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--c2); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--c2); outline-offset: 3px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--panel-solid); padding: 8px 14px; z-index: 100; }
.skip:focus { left: 8px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.muted { color: var(--ink-3); }

/* ------------------------------------------------------------ nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 14px max(16px, calc((100vw - var(--maxw)) / 2));
  background: rgba(7, 6, 26, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; letter-spacing: 0.02em; }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  font-size: 13px; font-weight: 900;
  background: linear-gradient(135deg, var(--pink), var(--cyan));
  color: #0b0820; box-shadow: 0 0 18px color-mix(in srgb, var(--pink) 50%, transparent);
}
.nav nav { display: flex; gap: 4px; }
.nav nav a { color: var(--ink-2); font-weight: 500; font-size: 15px; padding: 6px 12px; border-radius: 999px; }
.nav nav a:hover, .nav nav a[aria-current] { background: rgba(255, 255, 255, 0.07); color: var(--ink); text-decoration: none; }
@media (max-width: 560px) { .brand-text { display: none; } .nav nav a { padding: 6px 9px; } }

/* ------------------------------------------------------------ shared */
.kicker {
  font-size: 13px; font-weight: 700; letter-spacing: 0.22em; text-transform: uppercase; color: var(--c1);
}
.kicker.spaced { letter-spacing: 0.45em; color: var(--cyan); }
h1, h2, h3, h4 { line-height: 1.12; letter-spacing: -0.015em; margin: 0; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px;
  font-weight: 700; color: #0b0820;
  background: linear-gradient(135deg, var(--pink), var(--cyan));
  box-shadow: 0 0 28px color-mix(in srgb, var(--pink) 40%, transparent);
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); box-shadow: 0 0 40px color-mix(in srgb, var(--cyan) 50%, transparent); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line-2); box-shadow: none; }
.btn.ghost:hover { border-color: var(--cyan); }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 0; }
.chips li {
  font-size: 13px; font-weight: 500; color: var(--ink-2); padding: 5px 12px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--line-2);
}
.chips.big li { font-size: 14px; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease var(--d, 0ms), transform 0.7s cubic-bezier(.2,.8,.2,1) var(--d, 0ms); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

.section { max-width: var(--maxw); margin: 0 auto; padding: 110px 16px 20px; }
.section-head { max-width: 760px; margin-bottom: 40px; }
.section-head h2 { font-size: clamp(32px, 5vw, 52px); font-weight: 800; margin: 10px 0 14px; }
.section-head p { color: var(--ink-2); margin: 0; }

/* ------------------------------------------------------------ hero */
.hero { position: relative; min-height: calc(100vh - 63px); display: grid; place-items: center; padding: 60px 16px 40px; overflow: hidden; }
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-text { position: relative; text-align: center; max-width: 980px; }
.hero-text::before {
  content: ""; position: absolute; inset: -60px -80px; z-index: -1; pointer-events: none;
  background: radial-gradient(closest-side, rgba(7, 6, 26, 0.82), rgba(7, 6, 26, 0.55) 60%, transparent);
}
.mega {
  font-size: clamp(56px, 13vw, 190px); font-weight: 900; letter-spacing: 0.02em; line-height: 1;
  margin: 18px 0 22px; display: flex; justify-content: center; flex-wrap: nowrap;
}
.mega span {
  display: inline-block;
  background: linear-gradient(180deg, #fff 10%, color-mix(in srgb, var(--pink) calc(100% - var(--i) * 11%), var(--cyan)));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 0 22px color-mix(in srgb, var(--pink) 35%, transparent));
  animation: pop 0.6s cubic-bezier(.3,1.6,.5,1) both; animation-delay: calc(0.25s + var(--i) * 0.08s);
}
@keyframes pop { from { opacity: 0; transform: translateY(60px) scale(0.6); } }
@media (prefers-reduced-motion: reduce) { .mega span { animation: none; } }
.hero-sub { font-size: clamp(17px, 2.2vw, 22px); color: var(--ink-2); max-width: 720px; margin: 0 auto 30px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.totals {
  position: relative; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px;
  width: min(var(--maxw), 100%); margin-top: 56px;
}
.totals div {
  background: var(--panel); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: 18px 20px; backdrop-filter: blur(6px); text-align: center;
}
.totals strong { display: block; font-size: clamp(26px, 4vw, 44px); font-weight: 900; font-variant-numeric: tabular-nums; }
.totals span { color: var(--ink-3); font-size: 14px; }
@media (max-width: 640px) { .totals { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------ video */
.video-frame {
  border-radius: 22px; padding: 2px; overflow: hidden;
  background: linear-gradient(135deg, var(--pink), var(--cyan));
  box-shadow: 0 0 60px color-mix(in srgb, var(--pink) 25%, transparent), 0 0 120px color-mix(in srgb, var(--cyan) 15%, transparent);
}
.video-frame video { display: block; width: 100%; aspect-ratio: 16 / 9; border-radius: 20px; background: #000; }

/* ------------------------------------------------------------ project cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 360px), 1fr)); gap: 20px; }
.pcard {
  position: relative; display: flex; flex-direction: column; color: var(--ink);
  background: var(--panel); border: 1px solid var(--line-2); border-radius: 22px; overflow: hidden;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.pcard:hover { text-decoration: none; transform: translateY(-4px); border-color: var(--c1);
  box-shadow: 0 0 40px color-mix(in srgb, var(--c1) 30%, transparent); }
.pcard::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: linear-gradient(var(--c1), var(--c2)); }
.pcard-canvas { width: 100%; aspect-ratio: 16 / 10; display: block; border-bottom: 1px solid var(--line); }
.pcard-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.pcard .kicker { color: var(--c1); }
.pcard h3 { font-size: 24px; font-weight: 800; }
.pcard p { margin: 0; color: var(--ink-2); font-size: 15px; }
.pcard-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 4px; }
.pcard-stats div { background: rgba(255, 255, 255, 0.04); border-radius: 12px; padding: 10px 12px; }
.pcard-stats strong { display: block; font-size: 20px; font-weight: 800; font-variant-numeric: tabular-nums; }
.pcard-stats span { font-size: 12.5px; color: var(--ink-3); line-height: 1.35; display: block; }
.more { margin-top: auto; padding-top: 6px; font-weight: 700; color: var(--c2); font-size: 14px; }

/* ------------------------------------------------------------ chart */
.chart { position: relative; background: var(--panel); border: 1px solid var(--line-2); border-radius: 22px; padding: 26px 26px 18px; }
.bar-row { display: grid; grid-template-columns: 130px 1fr 96px; align-items: center; gap: 14px; padding: 5px 6px; border-radius: 8px; cursor: default; }
.bar-row:hover, .bar-row:focus-visible { background: rgba(255, 255, 255, 0.05); }
.bar-name { font-size: 14px; font-weight: 600; color: var(--ink-2); text-align: right; }
.bar-track { height: 14px; }
.bar {
  height: 100%; width: 0; border-radius: 0 4px 4px 0;
  background: var(--cyan); box-shadow: 0 0 14px color-mix(in srgb, var(--cyan) 45%, transparent);
  transition: width 1.1s cubic-bezier(.2,.8,.2,1);
}
.chart.in .bar { width: var(--w); }
.bar-val { font-size: 14px; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.tip {
  position: absolute; pointer-events: none; opacity: 0; transition: opacity 0.12s;
  max-width: 360px; padding: 10px 12px; border-radius: 10px; font-size: 13px; line-height: 1.45;
  background: var(--panel-solid); border: 1px solid var(--line-2); color: var(--ink); box-shadow: 0 10px 30px rgba(0,0,0,.4);
}
.tip.on { opacity: 1; }
@media (max-width: 640px) { .bar-row { grid-template-columns: 92px 1fr 76px; gap: 8px; } .chart { padding: 18px 12px; } }
@media (prefers-reduced-motion: reduce) { .bar { transition: none; } }
.table-view { margin-top: 14px; }
.table-view summary { cursor: pointer; color: var(--ink-2); font-weight: 600; font-size: 15px; }
.tech-h { margin: 46px 0 16px; font-size: 22px; font-weight: 700; }

/* ------------------------------------------------------------ project page */
.rail { max-width: var(--maxw); margin: 22px auto 0; padding: 0 16px; display: flex; gap: 8px; }
.rail a { flex: 1; height: 6px; border-radius: 4px; background: rgba(255, 255, 255, 0.1); transition: transform .2s; }
.rail a.done { background: color-mix(in srgb, var(--pc) 55%, transparent); }
.rail a.now { background: var(--pc); box-shadow: 0 0 12px var(--pc); }
.rail a:hover { transform: scaleY(1.8); }
.phero {
  position: relative; max-width: var(--maxw); margin: 0 auto; padding: 50px 16px 10px;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 30px; align-items: center;
}
.phero-canvas { order: 2; width: 100%; aspect-ratio: 860 / 780; display: block; }
.phero-text h1 { font-size: clamp(40px, 6vw, 78px); font-weight: 800; margin: 14px 0 18px; }
.lede { font-size: clamp(17px, 1.8vw, 20px); color: var(--ink-2); margin: 0 0 22px; }
@media (max-width: 900px) {
  .phero { grid-template-columns: 1fr; }
  .phero-canvas { order: 0; max-width: 520px; margin: 0 auto; }
}
.stats { max-width: var(--maxw); margin: 26px auto 0; padding: 0 16px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.stat {
  position: relative; background: var(--panel); border: 1px solid color-mix(in srgb, var(--c1) 55%, transparent);
  border-radius: var(--radius); padding: 20px 22px 18px 26px; overflow: hidden;
}
.stat::before { content: ""; position: absolute; left: 0; top: 18px; bottom: 18px; width: 4px; border-radius: 0 4px 4px 0; background: var(--c1); box-shadow: 0 0 12px var(--c1); }
.stat-num { font-size: clamp(28px, 3.2vw, 42px); font-weight: 800; font-variant-numeric: tabular-nums; color: color-mix(in srgb, #fff 75%, var(--c2)); white-space: nowrap; }
.stat-label { font-size: 14px; color: var(--ink-3); line-height: 1.4; margin-top: 4px; }
@media (max-width: 900px) { .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 420px) { .stats { grid-template-columns: 1fr; } }

.doc { max-width: var(--maxw); margin: 70px auto 0; padding: 0 16px; display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 56px; }
.toc { position: sticky; top: 90px; align-self: start; max-height: calc(100vh - 110px); overflow: auto; font-size: 14px; }
.toc-title { font-size: 12px; font-weight: 700; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 10px; }
.toc ol { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line-2); }
.toc a { display: block; padding: 6px 0 6px 14px; margin-left: -1px; color: var(--ink-3); border-left: 2px solid transparent; line-height: 1.35; }
.toc a:hover { color: var(--ink); text-decoration: none; }
.toc a.on { color: var(--ink); border-left-color: var(--c1); }
@media (max-width: 980px) { .doc { grid-template-columns: 1fr; gap: 20px; } .toc { position: static; max-height: none; } .toc ol { display: flex; flex-wrap: wrap; gap: 6px; border: 0; } .toc a { border: 1px solid var(--line-2); border-radius: 999px; padding: 4px 12px; } }

/* ------------------------------------------------------------ prose */
.prose { min-width: 0; max-width: 860px; color: var(--ink-2); }
.prose > :first-child { margin-top: 0; }
.prose h2 {
  font-size: clamp(28px, 3.4vw, 38px); font-weight: 800; color: var(--ink);
  margin: 70px 0 18px; padding-top: 4px;
}
.prose h2::after { content: ""; display: block; width: 64px; height: 4px; border-radius: 4px; margin-top: 14px; background: linear-gradient(90deg, var(--c1), var(--c2)); box-shadow: 0 0 14px var(--c1); }
.prose h3 { font-size: 23px; font-weight: 700; color: var(--ink); margin: 44px 0 12px; }
.prose h4 { font-size: 18px; color: var(--ink); margin: 30px 0 10px; }
.prose h2, .prose h3, .prose h4 { position: relative; }
.anchor { position: absolute; left: -1.1em; color: var(--ink-3); opacity: 0; font-weight: 500; }
.prose :is(h2, h3, h4):hover .anchor { opacity: 1; text-decoration: none; }
.prose p { margin: 0 0 16px; }
.prose strong { color: var(--ink); font-weight: 650; }
.prose em { color: var(--ink); }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 18px; }
.prose li { margin: 5px 0; }
.prose li::marker { color: var(--c1); }
.prose hr { border: 0; height: 1px; background: var(--line-2); margin: 46px 0; }
.prose code {
  font-family: var(--mono); font-size: 0.86em; color: var(--ink);
  background: rgba(255, 255, 255, 0.07); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px;
}
.code-wrap {
  position: relative; margin: 22px 0 26px; border-radius: 16px; padding: 1px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--c1) 60%, transparent), color-mix(in srgb, var(--c2) 60%, transparent));
}
.code-wrap pre {
  margin: 0; overflow-x: auto; padding: 20px 22px; border-radius: 15px;
  background: #0b0922; font: 13.5px/1.55 var(--mono); color: color-mix(in srgb, #fff 70%, var(--c2));
}
.code-wrap pre code { background: none; border: 0; padding: 0; font-size: inherit; color: inherit; }
.table-wrap { overflow-x: auto; margin: 18px 0 26px; border: 1px solid var(--line-2); border-radius: 14px; background: var(--panel); }
table { border-collapse: collapse; width: 100%; font-size: 14.5px; font-variant-numeric: tabular-nums; }
th, td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--ink); font-weight: 650; background: rgba(255, 255, 255, 0.04); white-space: nowrap; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: rgba(255, 255, 255, 0.03); }
td[align="right"], th[align="right"] { text-align: right; }
.katex { font-size: 1.06em; color: var(--ink); }
.katex-display { overflow-x: auto; overflow-y: hidden; padding: 16px 18px; margin: 20px 0 24px; background: var(--panel); border: 1px solid var(--line-2); border-left: 3px solid var(--c1); border-radius: 12px; }

.pager { max-width: var(--maxw); margin: 90px auto 0; padding: 0 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pager-card { display: flex; flex-direction: column; gap: 4px; padding: 22px 24px; border-radius: var(--radius); background: var(--panel); border: 1px solid var(--line-2); color: var(--ink); transition: border-color .2s, box-shadow .2s; }
.pager-card strong { font-size: 20px; }
.pager-card.next { text-align: right; }
.pager-card:hover { text-decoration: none; border-color: var(--pc); box-shadow: 0 0 30px color-mix(in srgb, var(--pc) 30%, transparent); }
@media (max-width: 560px) { .pager { grid-template-columns: 1fr; } .pager-card.next { text-align: left; } }

/* ------------------------------------------------------------ footer / 404 */
.foot { max-width: var(--maxw); margin: 110px auto 0; padding: 30px 16px 50px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 10px 30px; justify-content: space-between; font-size: 14px; color: var(--ink-2); }
.nf { position: relative; min-height: 75vh; display: grid; place-items: center; text-align: center; padding: 40px 16px; overflow: hidden; }
.nf-canvas { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .5; }
.nf > div { position: relative; }
.nf h1 { font-size: clamp(30px, 5vw, 54px); margin: 12px 0 28px; }
.dive-link { margin: 22px 0 0; }