/* ==========================================================================
   Igor Millis — portfolio
   Design tokens → base → layout → components → pages
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root {
  --bg: #0b0e11;
  --bg-raised: #0f1317;
  --bg-hover: #12181d;
  --line: #1f272e;
  --line-strong: #2d3740;
  --text: #e6e8ea;
  --text-2: #a3acb4;
  --text-3: #6f7a84;
  --accent: #6cc4c9;
  --accent-dim: #3d8b91;
  --accent-bg: rgba(108, 196, 201, 0.08);
  --signal: #e8b04b;
  --signal-bg: rgba(232, 176, 75, 0.1);
  --grid: rgba(255, 255, 255, 0.025);
  --particle: 108, 196, 201;

  --f-sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "Geist Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  --f-serif: "Newsreader", Georgia, "Times New Roman", serif;

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f6f5f1;
  --bg-raised: #ffffff;
  --bg-hover: #efeee9;
  --line: #dedcd5;
  --line-strong: #c9c6bd;
  --text: #1a1f24;
  --text-2: #4d555d;
  --text-3: #79818a;
  --accent: #0e4d5c;
  --accent-dim: #3f7682;
  --accent-bg: rgba(14, 77, 92, 0.07);
  --signal: #9a6510;
  --signal-bg: rgba(154, 101, 16, 0.09);
  --grid: rgba(0, 0, 0, 0.035);
  --particle: 14, 77, 92;
  color-scheme: light;
}

/* ---------- 2. Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.65 var(--f-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-color: var(--line-strong); text-underline-offset: 3px; transition: color .2s, text-decoration-color .2s; }
a:hover { color: var(--accent); text-decoration-color: var(--accent); }
::selection { background: var(--accent); color: var(--bg); }
:focus-visible { outline: 1px solid var(--accent); outline-offset: 3px; }
h1, h2, h3, h4 { font-weight: 500; letter-spacing: -0.02em; line-height: 1.12; margin: 0; }
p { margin: 0 0 1em; }
code, pre, kbd, .mono { font-family: var(--f-mono); }
em.voice, .voice { font-family: var(--f-serif); font-style: italic; font-weight: 400; letter-spacing: -0.01em; }
hr { border: 0; border-top: 1px solid var(--line); margin: 0; }

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: 12px; top: -40px; background: var(--accent); color: var(--bg); padding: 6px 10px; font: 500 13px var(--f-mono); z-index: 100; }
.skip:focus { top: 12px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }
.label { font: 400 12px/1.5 var(--f-mono); letter-spacing: 0.04em; color: var(--text-3); text-transform: lowercase; }
.label b { color: var(--accent); font-weight: 400; }
.accent { color: var(--accent); }
.signal { color: var(--signal); }
.muted { color: var(--text-2); }

/* ---------- 3. Header ---------- */
.top {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 16px; }
.brand { font: 500 13px var(--f-mono); text-decoration: none; display: flex; align-items: center; gap: 10px; white-space: nowrap; }
.brand .logo { width: 20px; height: 20px; flex: none; transition: transform .3s var(--ease); }
.brand .logo rect { fill: var(--bg-raised); stroke: var(--line-strong); stroke-width: 1; }
.brand .logo path { fill: none; stroke: var(--accent); stroke-width: 2.6; stroke-linecap: square; }
.brand:hover .logo { transform: rotate(-8deg); }
.brand .path { color: var(--text-3); }
@keyframes pulse { 50% { box-shadow: 0 0 0 6px transparent; } }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { font: 400 13px var(--f-mono); text-decoration: none; color: var(--text-2); padding: 6px 10px; border-radius: 4px; }
.nav a:hover { color: var(--text); background: var(--bg-hover); }
.nav a[aria-current="page"] { color: var(--accent); }
.nav a[aria-current="page"]::before { content: "▸ "; }
.tools { display: flex; align-items: center; gap: 6px; }
.btn-ghost {
  font: 400 12px var(--f-mono); color: var(--text-2); background: transparent;
  border: 1px solid var(--line-strong); border-radius: 4px; padding: 4px 8px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px; text-decoration: none; line-height: 1.4;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-3); }
.lang a { text-decoration: none; color: var(--text-3); }
.lang a[aria-current="true"] { color: var(--text); }
.lang .sep { color: var(--line-strong); margin: 0 2px; }
.theme-ico { width: 13px; height: 13px; }

/* ---------- 4. Footer / status bar ---------- */
.foot { border-top: 1px solid var(--line); margin-top: 120px; }
.foot-main { display: grid; grid-template-columns: minmax(0, 2fr) repeat(2, minmax(0, 1fr)); gap: 32px; padding: 48px 0 40px; }
.foot h2 { font-size: clamp(26px, 3.6vw, 38px); max-width: 14ch; }
.foot ul { list-style: none; margin: 0; padding: 0; font: 400 13px/2.1 var(--f-mono); }
.foot ul a { text-decoration: none; color: var(--text-2); }
.foot ul a:hover { color: var(--accent); }
.status {
  border-top: 1px solid var(--line); font: 400 11px var(--f-mono); color: var(--text-3);
  display: flex; justify-content: space-between; gap: 16px; padding: 10px 0; flex-wrap: wrap;
}
.status span { white-space: nowrap; }

/* ---------- 5. Section scaffolding ---------- */
.page-head { padding: 88px 0 56px; border-bottom: 1px solid var(--line); }
.page-head h1 { font-size: clamp(40px, 7vw, 84px); letter-spacing: -0.035em; margin-top: 18px; max-width: 16ch; }
.page-head .lede { font-size: clamp(17px, 1.6vw, 20px); color: var(--text-2); max-width: 60ch; margin-top: 24px; }
.sec { padding: 72px 0; border-bottom: 1px solid var(--line); }
.sec:last-of-type { border-bottom: 0; }
.sec-grid { display: grid; grid-template-columns: minmax(0, 2.2fr) minmax(0, 9.8fr); gap: 32px; }
.sec-grid > .side { position: relative; }
.sec-grid > .side .label { position: sticky; top: 88px; display: block; }
.sec h2 { font-size: clamp(26px, 3vw, 36px); margin-bottom: 24px; }
.sec h3 { font-size: 19px; margin: 36px 0 12px; }
.prose { max-width: 68ch; color: var(--text-2); }
.prose p, .prose li { color: var(--text-2); }
.prose strong { color: var(--text); font-weight: 500; }
.prose ul { padding-left: 1.1em; }
.prose li { margin-bottom: 0.45em; }
.prose li::marker { color: var(--accent); content: "— "; }
.prose code { font-size: 0.88em; color: var(--text); background: var(--bg-raised); border: 1px solid var(--line); padding: 1px 5px; border-radius: 3px; }

/* ---------- 6. Home hero ---------- */
.hero { position: relative; min-height: min(86vh, 760px); display: flex; align-items: flex-end; border-bottom: 1px solid var(--line); overflow: hidden; }
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero .wrap { position: relative; padding-top: 120px; padding-bottom: 64px; }
.hero h1 { font-size: clamp(42px, 7.4vw, 104px); letter-spacing: -0.04em; line-height: 1; max-width: 13ch; margin-top: 22px; }
.hero h1 .voice { color: var(--accent); }
.hero .sub { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-top: 34px; font: 400 13px/1.7 var(--f-mono); color: var(--text-2); }
.hero .sub span::before { content: "// "; color: var(--text-3); }
.hero .readout { position: absolute; right: var(--gutter); bottom: 22px; text-align: right; font: 400 11px/1.7 var(--f-mono); color: var(--text-3); }
.prompt { font: 400 13px var(--f-mono); color: var(--text-3); }
.prompt .cmd { color: var(--text); }
.prompt .flag { color: var(--accent); }
.caret { display: inline-block; width: 8px; height: 15px; background: var(--accent); vertical-align: -2px; margin-left: 4px; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---------- 7. Index rows (work list) ---------- */
.index { border-top: 1px solid var(--line); }
.row {
  display: grid; grid-template-columns: 64px minmax(0, 1fr) minmax(0, 0.9fr) 28px; gap: 24px; align-items: baseline;
  padding: 28px 8px; border-bottom: 1px solid var(--line); text-decoration: none; position: relative;
  transition: background .3s var(--ease), padding .3s var(--ease);
}
.row:hover { background: var(--bg-hover); padding-left: 16px; color: inherit; }
.row .n { font: 400 12px var(--f-mono); color: var(--accent); }
.row h3 { font-size: clamp(24px, 3vw, 34px); margin: 0; }
.row .desc { color: var(--text-2); font-size: 15px; margin-top: 8px; }
.row .meta { font: 400 12px/1.9 var(--f-mono); color: var(--text-3); }
.row .meta b { color: var(--text); font-weight: 400; }
.row .arr { font: 400 16px var(--f-mono); color: var(--text-3); transition: transform .3s var(--ease), color .3s; }
.row:hover .arr { transform: translate(4px, -4px); color: var(--accent); }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.tag { font: 400 11px var(--f-mono); color: var(--text-2); border: 1px solid var(--line-strong); padding: 2px 7px; border-radius: 3px; }

/* ---------- 8. Home: three doors ---------- */
.doors { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-bottom: 1px solid var(--line); }
.door { padding: 40px 32px 44px 0; text-decoration: none; display: flex; flex-direction: column; gap: 14px; min-height: 260px; position: relative; }
.door + .door { padding-left: 32px; border-left: 1px solid var(--line); }
.door h2 { font-size: clamp(28px, 3vw, 40px); }
.door p { color: var(--text-2); font-size: 15px; max-width: 34ch; margin: 0; }
.door .go { margin-top: auto; font: 400 12px var(--f-mono); color: var(--text-3); transition: color .2s; }
.door:hover { color: inherit; }
.door:hover .go { color: var(--accent); }
.door:hover h2 { color: var(--accent); }

/* ---------- 9. Numbers / spec sheet ---------- */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.stat { padding: 20px 20px 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat .v { font: 500 clamp(28px, 3.4vw, 42px)/1 var(--f-sans); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.stat .k { font: 400 11.5px/1.5 var(--f-mono); color: var(--text-3); margin-top: 10px; }
.spec { font: 400 12.5px/1.6 var(--f-mono); border-top: 1px solid var(--line); }
.spec div { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 12px; padding: 9px 0; border-bottom: 1px solid var(--line); }
.spec dt { color: var(--text-3); }
.spec dd { margin: 0; color: var(--text); }
.spec dd a { color: var(--accent); }
.overview .spec { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 40px; border-top: 0; }
.overview .spec div:nth-child(-n+2) { border-top: 1px solid var(--line); }
@media (max-width: 720px) {
  .overview .spec { grid-template-columns: minmax(0, 1fr); }
  .overview .spec div:nth-child(2) { border-top: 0; }
}

/* ---------- 10. Tables ---------- */
.tbl-wrap { overflow-x: auto; margin: 8px 0 12px; border: 1px solid var(--line); border-radius: 4px; }
table { border-collapse: collapse; width: 100%; font: 400 13px var(--f-mono); font-variant-numeric: tabular-nums; }
th, td { padding: 10px 14px; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
table.l2 th:nth-child(2), table.l2 td:nth-child(2) { text-align: left; color: var(--text-2); }
table { font-size: 12.5px; }
thead th { color: var(--text-3); font-weight: 400; background: var(--bg-raised); white-space: normal; vertical-align: bottom; line-height: 1.35; }
th, td { padding: 10px 12px; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover td { background: var(--bg-hover); }
tr.hl td { color: var(--accent); }
.cap { font: 400 11.5px/1.6 var(--f-mono); color: var(--text-3); margin-top: 10px; }
.cap a { color: var(--text-2); }

/* ---------- 11. Figures / panels ---------- */
.panel { border: 1px solid var(--line); background: var(--bg-raised); border-radius: 4px; overflow: hidden; }
.panel-h { display: flex; justify-content: space-between; gap: 12px; padding: 9px 14px; border-bottom: 1px solid var(--line); font: 400 11.5px var(--f-mono); color: var(--text-3); flex-wrap: wrap; }
.panel-h .dots { display: inline-flex; gap: 5px; margin-right: 10px; vertical-align: 1px; }
.panel-h .dots i { width: 7px; height: 7px; border-radius: 50%; border: 1px solid var(--line-strong); display: block; }
.panel-b { padding: 18px; }
figure { margin: 28px 0; }
figure img { border: 1px solid var(--line); border-radius: 4px; background: #fff; }
figcaption { font: 400 11.5px/1.6 var(--f-mono); color: var(--text-3); margin-top: 10px; }
.fig-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.chart svg { width: 100%; height: auto; display: block; overflow: visible; }
.chart text { font-family: var(--f-mono); font-size: 11px; fill: var(--text-3); }
.chart .t-strong { fill: var(--text); }
.chart .t-accent { fill: var(--accent); }
.chart .ax { stroke: var(--line-strong); stroke-width: 1; }
.chart .gl { stroke: var(--line); stroke-width: 1; }
.chart .bar { fill: var(--line-strong); }
.chart .bar.hl { fill: var(--accent); }
.chart .ln-a { fill: none; stroke: var(--accent); stroke-width: 1.75; }
.chart .ln-b { fill: none; stroke: var(--text-2); stroke-width: 1.25; stroke-dasharray: 4 3; }
.chart .ln-c { fill: none; stroke: var(--signal); stroke-width: 1.25; }
.chart .cursor { stroke: var(--text); stroke-width: 1; stroke-dasharray: 2 3; }
.chart .pt { fill: var(--bg); stroke-width: 1.5; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; font: 400 11.5px var(--f-mono); color: var(--text-2); margin-bottom: 12px; }
.legend i { display: inline-block; width: 14px; height: 2px; vertical-align: 3px; margin-right: 6px; }

/* Pipeline diagram */
.pipe { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 0; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.pipe button {
  all: unset; cursor: pointer; padding: 16px 12px 18px; border-right: 1px solid var(--line); position: relative;
  font: 400 11px/1.45 var(--f-mono); color: var(--text-3); transition: background .2s, color .2s;
  overflow-wrap: anywhere; min-width: 0;
}
.pipe button:last-child { border-right: 0; }
.pipe button b { display: block; font: 500 15px var(--f-mono); color: var(--text); margin-bottom: 6px; }
.pipe button:hover { background: var(--bg-hover); }
.pipe button[aria-selected="true"] { background: var(--accent-bg); color: var(--text-2); }
.pipe button[aria-selected="true"] b { color: var(--accent); }
.pipe button[aria-selected="true"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--accent); }
.pipe-detail { margin-top: 16px; min-height: 88px; padding: 16px 18px; border-left: 2px solid var(--accent); background: var(--bg-raised); font-size: 15px; color: var(--text-2); }
.pipe-detail strong { color: var(--text); font-weight: 500; }

/* Replay console */
.replay-q { display: flex; flex-wrap: wrap; gap: 6px; padding: 14px; border-bottom: 1px solid var(--line); }
.replay-q button {
  font: 400 12px/1.4 var(--f-mono); color: var(--text-2); background: transparent; border: 1px solid var(--line-strong);
  border-radius: 3px; padding: 5px 9px; cursor: pointer; text-align: left;
}
.replay-q button:hover { color: var(--text); border-color: var(--text-3); }
.replay-q button[aria-pressed="true"] { color: var(--bg); background: var(--accent); border-color: var(--accent); }
.replay-steps { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr) minmax(0, 0.7fr); }
.replay-steps pre[data-s="1"] { white-space: pre; word-break: normal; overflow-x: auto; }
.replay-steps > div { padding: 14px; border-right: 1px solid var(--line); min-width: 0; }
.replay-steps > div:last-child { border-right: 0; }
.replay-steps .label { margin-bottom: 10px; display: block; }
.replay-steps pre { margin: 0; font: 400 11.5px/1.65 var(--f-mono); color: var(--text-2); white-space: pre-wrap; word-break: break-word; }
.replay-steps .k { color: var(--accent); }
.replay-steps .s { color: var(--text); }
.replay-steps .kw { color: var(--signal); }
.replay-steps .step { opacity: 0; transform: translateY(6px); transition: opacity .45s var(--ease), transform .45s var(--ease); }
.replay-steps .step.on { opacity: 1; transform: none; }
.verdict { font: 400 12px/1.6 var(--f-mono); padding: 10px 14px; border-top: 1px solid var(--line); color: var(--text-2); }
.verdict.warn { color: var(--signal); background: var(--signal-bg); }

/* Threshold explorer */
.th-ctrl { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.th-ctrl output { font: 500 22px var(--f-mono); color: var(--accent); min-width: 64px; }
input[type="range"] { -webkit-appearance: none; appearance: none; flex: 1; min-width: 180px; height: 22px; background: transparent; cursor: pointer; }
input[type="range"]::-webkit-slider-runnable-track { height: 1px; background: var(--line-strong); }
input[type="range"]::-moz-range-track { height: 1px; background: var(--line-strong); }
input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 14px; height: 14px; margin-top: -7px; background: var(--bg); border: 1.5px solid var(--accent); border-radius: 50%; }
input[type="range"]::-moz-range-thumb { width: 12px; height: 12px; background: var(--bg); border: 1.5px solid var(--accent); border-radius: 50%; }
.th-read { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); margin-top: 16px; }
.th-read div { padding: 12px 0 0; }
.th-read .v { font: 500 24px var(--f-mono); font-variant-numeric: tabular-nums; }
.th-read .k { font: 400 11px var(--f-mono); color: var(--text-3); }

/* Confusion matrix */
.cm { display: grid; grid-template-columns: 76px repeat(2, minmax(0, 120px)); gap: 0; font: 400 12px var(--f-mono); }
.cm div { padding: 14px 12px; border: 1px solid var(--line); margin: 0 -1px -1px 0; }
.cm .h { color: var(--text-3); border: 0; padding: 6px 12px 6px 0; white-space: nowrap; }
.cm .c { font-size: 22px; font-weight: 500; color: var(--text); font-variant-numeric: tabular-nums; }
.cm .c small { display: block; font-size: 10.5px; font-weight: 400; color: var(--text-3); margin-top: 4px; }
.cm .tp { background: var(--accent-bg); color: var(--accent); }

/* Callout */
.note { border: 1px solid var(--line); border-left: 2px solid var(--signal); padding: 14px 18px; background: var(--signal-bg); font-size: 14.5px; color: var(--text-2); margin: 24px 0; border-radius: 0; }
.note strong { color: var(--text); font-weight: 500; }

/* Code block */
pre.code { background: var(--bg-raised); border: 1px solid var(--line); border-radius: 4px; padding: 16px 18px; overflow-x: auto; font: 400 12.5px/1.7 var(--f-mono); color: var(--text-2); margin: 16px 0 24px; }

/* ---------- 12. About ---------- */
.about-grid { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 56px; align-items: start; }
.portrait { position: relative; border: 1px solid var(--line); border-radius: 4px; overflow: hidden; aspect-ratio: 1; background: var(--bg-raised); }
.portrait img { width: 100%; height: 100%; object-fit: cover; }
.portrait .cross { position: absolute; inset: 0; pointer-events: none; z-index: 2; }
.portrait .cross::before, .portrait .cross::after { content: ""; position: absolute; background: rgba(255,255,255,.35); }
.portrait .cross::before { left: 50%; top: 12px; bottom: 12px; width: 1px; opacity: .25; }
.portrait .cross::after { top: 50%; left: 12px; right: 12px; height: 1px; opacity: .25; }
.portrait-cap { font: 400 11px/1.7 var(--f-mono); color: var(--text-3); margin-top: 10px; display: flex; justify-content: space-between; }
.about-text p { font-size: clamp(17px, 1.5vw, 19px); line-height: 1.7; color: var(--text-2); }
.about-text p:first-child { color: var(--text); font-size: clamp(20px, 2vw, 25px); line-height: 1.5; letter-spacing: -0.01em; }
.timeline { border-left: 1px solid var(--line-strong); margin-left: 4px; }
.tl { position: relative; padding: 0 0 28px 24px; }
.tl::before { content: ""; position: absolute; left: -4px; top: 7px; width: 7px; height: 7px; border-radius: 50%; background: var(--bg); border: 1px solid var(--accent); }
.tl.now::before { background: var(--accent); }
.tl .when { font: 400 12px var(--f-mono); color: var(--text-3); }
.tl h3 { font-size: 18px; margin: 4px 0 4px; }
.tl p { color: var(--text-2); font-size: 15px; margin: 0; }
.stack { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 40px; }
.stack div { display: grid; grid-template-columns: 104px minmax(0, 1fr); gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.stack dt { font: 400 12px/1.7 var(--f-mono); color: var(--text-3); }
.stack dd { margin: 0; font-size: 15px; color: var(--text); }
.links-big { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
.links-big a { display: grid; grid-template-columns: 120px minmax(0, 1fr) 24px; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); text-decoration: none; align-items: baseline; }
.links-big .k { font: 400 12px var(--f-mono); color: var(--text-3); }
.links-big .v { font-size: clamp(18px, 2.2vw, 26px); letter-spacing: -0.02em; word-break: break-all; }
.links-big .arr { font-family: var(--f-mono); color: var(--text-3); }
.links-big a:hover .arr { color: var(--accent); }

/* ---------- 13. Research ---------- */
.notes { border-top: 1px solid var(--line); }
.note-row { display: grid; grid-template-columns: 120px minmax(0, 1fr) 160px; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--line); text-decoration: none; align-items: baseline; }
.note-row:hover { color: inherit; background: var(--bg-hover); }
.note-row time { font: 400 12px var(--f-mono); color: var(--text-3); }
.note-row h3 { font-size: 22px; margin: 0 0 8px; }
.note-row p { color: var(--text-2); font-size: 15px; margin: 0; }
.note-row .kind { font: 400 11.5px var(--f-mono); color: var(--accent); text-align: right; }
.queue { list-style: none; padding: 0; margin: 0; }
.queue li { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 24px; padding: 16px 0; border-bottom: 1px dashed var(--line); color: var(--text-2); }
.queue li span:first-child { font: 400 12px var(--f-mono); color: var(--text-3); }

.article { max-width: 72ch; }
.article p, .article li { font-size: 17px; line-height: 1.75; color: var(--text-2); }
.article h2 { font-size: 26px; margin: 56px 0 18px; }
.article h2 .n { font: 400 13px var(--f-mono); color: var(--accent); margin-right: 12px; vertical-align: 4px; }
.article strong { color: var(--text); font-weight: 500; }
.eq { margin: 28px 0; padding: 18px 20px; border: 1px solid var(--line); background: var(--bg-raised); overflow-x: auto; position: relative; font-size: 17px; color: var(--text); }
.eq .tag-n { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font: 400 12px var(--f-mono); color: var(--text-3); }
.article h2 + .tbl-wrap, .article p + .tbl-wrap { margin: 20px 0 24px; }
table.txt th, table.txt td { white-space: normal; text-align: left; vertical-align: top; line-height: 1.5; min-width: 120px; }
table.txt td:first-child { color: var(--text); }
.worlds { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 28px; }
.worlds .wt { font: 500 11.5px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--text-2); margin: 0 0 10px; }
.worlds .boot .wt { color: var(--accent); }
.worlds .box { border: 1px solid var(--line-strong); background: var(--bg); padding: 10px 12px; border-radius: 3px; color: var(--text); font-size: 14.5px; line-height: 1.5; }
.worlds .boot .box { border-color: var(--accent); }
.worlds .step { font: 400 11px var(--f-mono); color: var(--text-3); padding: 6px 0 6px 14px; border-left: 1px solid var(--line-strong); margin-left: 18px; }
.worlds-foot { margin-top: 18px; font-size: 14.5px; color: var(--text-2); }
.worlds-foot p { margin: 4px 0; }
.boot-btns { display: inline-flex; flex-wrap: wrap; gap: 6px; }
@media (max-width: 560px) { .worlds { grid-template-columns: minmax(0, 1fr); } }
.byline { display: flex; flex-wrap: wrap; gap: 6px 24px; font: 400 12px var(--f-mono); color: var(--text-3); margin-top: 28px; }

/* ---------- 14. Command palette ---------- */
.cmdk { position: fixed; inset: 0; z-index: 80; background: rgba(5, 7, 9, 0.62); display: none; align-items: flex-start; justify-content: center; padding: 12vh 16px 16px; }
:root[data-theme="light"] .cmdk { background: rgba(30, 30, 28, 0.28); }
.cmdk.open { display: flex; animation: fade .18s var(--ease); }
.cmdk-box { width: min(560px, 100%); background: var(--bg-raised); border: 1px solid var(--line-strong); border-radius: 6px; overflow: hidden; box-shadow: 0 24px 60px rgba(0,0,0,.35); }
.cmdk input { width: 100%; background: transparent; border: 0; border-bottom: 1px solid var(--line); padding: 16px 18px; font: 400 15px var(--f-mono); color: var(--text); outline: none; }
.cmdk ul { list-style: none; margin: 0; padding: 6px; max-height: 50vh; overflow-y: auto; }
.cmdk li { display: flex; justify-content: space-between; gap: 12px; padding: 10px 12px; border-radius: 4px; font: 400 13px var(--f-mono); color: var(--text-2); cursor: pointer; }
.cmdk li small { color: var(--text-3); }
.cmdk li[aria-selected="true"] { background: var(--accent-bg); color: var(--accent); }
.cmdk-foot { border-top: 1px solid var(--line); padding: 8px 14px; font: 400 11px var(--f-mono); color: var(--text-3); display: flex; gap: 16px; }
kbd { font: 400 11px var(--f-mono); border: 1px solid var(--line-strong); border-radius: 3px; padding: 0 4px; color: var(--text-2); }
@keyframes fade { from { opacity: 0; } }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translate(-50%, 20px); background: var(--text); color: var(--bg); font: 400 12px var(--f-mono); padding: 8px 14px; border-radius: 4px; opacity: 0; transition: all .3s var(--ease); z-index: 90; pointer-events: none; }
.toast.on { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 15. Reveal on scroll ---------- */
.js .rv { opacity: 0; transform: translateY(14px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.js .rv.in { opacity: 1; transform: none; }

/* ---------- 16. 404 ---------- */
.nf { padding: 140px 0; }
.nf h1 { font: 500 clamp(80px, 16vw, 200px)/0.9 var(--f-mono); letter-spacing: -0.06em; color: var(--accent); }

/* ---------- 17. Responsive ---------- */
@media (max-width: 960px) {
  .sec-grid { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .sec-grid > .side .label { position: static; }
  .about-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .portrait { max-width: 360px; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stack { grid-template-columns: minmax(0, 1fr); }
  .pipe { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .pipe button:nth-child(4) { border-right: 0; }
  .pipe button:nth-child(-n+4) { border-bottom: 1px solid var(--line); }
  .replay-steps { grid-template-columns: minmax(0, 1fr); }
  .replay-steps > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .foot-main { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .foot-main > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .nav { display: none; }
  .brand .path { display: none; }
  .doors { grid-template-columns: minmax(0, 1fr); }
  .door, .door + .door { padding: 32px 0; border-left: 0; min-height: 0; }
  .door + .door { border-top: 1px solid var(--line); }
  .row { grid-template-columns: 36px minmax(0, 1fr) 20px; gap: 14px; padding: 22px 0; }
  .row:hover { padding-left: 0; }
  .row .meta { grid-column: 2 / 3; }
  .row .arr { grid-row: 1; grid-column: 3; }
  .note-row { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .note-row .kind { text-align: left; }
  .queue li { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .fig-grid { grid-template-columns: minmax(0, 1fr); }
  .th-read .v { font-size: 19px; }
  .links-big a { grid-template-columns: minmax(0, 1fr) 24px; }
  .links-big .k { grid-column: 1 / -1; }
  .spec div { grid-template-columns: 90px minmax(0, 1fr); }
  .stack div { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .hero .readout { display: none; }
  .page-head { padding: 56px 0 40px; }
  .sec { padding: 52px 0; }
  .foot-main { grid-template-columns: minmax(0, 1fr); }
  .top .wrap.mob-nav { display: flex; height: auto; }
}
.top .mob-nav { display: none; gap: 2px; border-top: 1px solid var(--line); }
.mob-nav a { flex: 1; text-align: center; font: 400 12px var(--f-mono); padding: 10px 0; text-decoration: none; color: var(--text-2); }
.mob-nav a[aria-current="page"] { color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .js .rv { opacity: 1; transform: none; }
}
@media print {
  .top, .foot .status, .cmdk, canvas { display: none !important; }
  body { background: #fff; color: #000; }
}

/* ---------- 18. Chroma palette: one hue per section/project (default; set on <html data-palette="chroma">) ---------- */
:root[data-palette="chroma"] {
  --c-teal: #6cc4c9; --c-amber: #e8b04b; --c-coral: #ec8a72; --c-sky: #82a9e6; --c-green: #93c48b;
}
:root[data-palette="chroma"][data-theme="light"] {
  --c-teal: #0e5f6e; --c-amber: #9a6510; --c-coral: #b04a32; --c-sky: #2f5fa8; --c-green: #3d7a35;
}
/* each section gets its own hue; everything inside follows --sc */
[data-palette="chroma"] .sec, [data-palette="chroma"] .page-head { --sc: var(--c-teal); }
[data-palette="chroma"] main > .sec:nth-of-type(5n+2) { --sc: var(--c-amber); }
[data-palette="chroma"] main > .sec:nth-of-type(5n+3) { --sc: var(--c-coral); }
[data-palette="chroma"] main > .sec:nth-of-type(5n+4) { --sc: var(--c-sky); }
[data-palette="chroma"] main > .sec:nth-of-type(5n+5) { --sc: var(--c-green); }
[data-palette="chroma"] .sec .label b, [data-palette="chroma"] .sec .side .label { color: var(--sc); }
[data-palette="chroma"] .sec h2::after { content: "."; color: var(--sc); }
[data-palette="chroma"] .prose strong, [data-palette="chroma"] .article strong, [data-palette="chroma"] .pipe-detail strong { color: var(--sc); }
[data-palette="chroma"] .prose li::marker { color: var(--sc); }
[data-palette="chroma"] .prose code, [data-palette="chroma"] .article code { color: var(--c-amber); border-color: color-mix(in srgb, var(--c-amber) 30%, transparent); }
[data-palette="chroma"] .prose a, [data-palette="chroma"] .article a { color: var(--c-sky); text-decoration-color: color-mix(in srgb, var(--c-sky) 40%, transparent); }
[data-palette="chroma"] .article h2 .n { color: var(--c-coral); }
[data-palette="chroma"] .eq { border-left: 2px solid var(--c-sky); }
/* numbers */
[data-palette="chroma"] .stat:nth-child(1) .v { color: var(--c-teal); }
[data-palette="chroma"] .stat:nth-child(2) .v { color: var(--c-amber); }
[data-palette="chroma"] .stat:nth-child(3) .v { color: var(--c-coral); }
[data-palette="chroma"] .stat:nth-child(4) .v { color: var(--c-sky); }
/* tags cycle */
[data-palette="chroma"] .tag:nth-child(5n+1) { color: var(--c-teal); border-color: color-mix(in srgb, var(--c-teal) 35%, transparent); }
[data-palette="chroma"] .tag:nth-child(5n+2) { color: var(--c-amber); border-color: color-mix(in srgb, var(--c-amber) 35%, transparent); }
[data-palette="chroma"] .tag:nth-child(5n+3) { color: var(--c-coral); border-color: color-mix(in srgb, var(--c-coral) 35%, transparent); }
[data-palette="chroma"] .tag:nth-child(5n+4) { color: var(--c-sky); border-color: color-mix(in srgb, var(--c-sky) 35%, transparent); }
[data-palette="chroma"] .tag:nth-child(5n+5) { color: var(--c-green); border-color: color-mix(in srgb, var(--c-green) 35%, transparent); }
/* identity per project and per door */
[data-palette="chroma"] .row:nth-child(1) { --rc: var(--c-teal); }
[data-palette="chroma"] .row:nth-child(2) { --rc: var(--c-coral); }
[data-palette="chroma"] .row .n, [data-palette="chroma"] .row:hover h3, [data-palette="chroma"] .row:hover .arr { color: var(--rc); }
[data-palette="chroma"] .row:hover { box-shadow: inset 2px 0 0 var(--rc); }
[data-palette="chroma"] .door:nth-child(1) { --dc: var(--c-sky); }
[data-palette="chroma"] .door:nth-child(2) { --dc: var(--c-teal); }
[data-palette="chroma"] .door:nth-child(3) { --dc: var(--c-amber); }
[data-palette="chroma"] .door .label b, [data-palette="chroma"] .door:hover h2, [data-palette="chroma"] .door:hover .go { color: var(--dc); }
[data-palette="chroma"] .door::before { content: ""; position: absolute; top: -1px; left: 0; width: 32px; height: 2px; background: var(--dc); }
[data-palette="chroma"] .door + .door::before { left: 32px; }
/* hero sub-lines and prompt */
[data-palette="chroma"] .hero .sub span:nth-child(1)::before { color: var(--c-amber); }
[data-palette="chroma"] .hero .sub span:nth-child(2)::before { color: var(--c-coral); }
[data-palette="chroma"] .hero .sub span:nth-child(3)::before { color: var(--c-sky); }
[data-palette="chroma"] .prompt .cmd { color: var(--c-amber); }
/* about */
[data-palette="chroma"] .stack div:nth-child(5n+1) dt { color: var(--c-teal); }
[data-palette="chroma"] .stack div:nth-child(5n+2) dt { color: var(--c-amber); }
[data-palette="chroma"] .stack div:nth-child(5n+3) dt { color: var(--c-coral); }
[data-palette="chroma"] .stack div:nth-child(5n+4) dt { color: var(--c-sky); }
[data-palette="chroma"] .stack div:nth-child(5n+5) dt { color: var(--c-green); }
[data-palette="chroma"] .links-big li:nth-child(1) a:hover .v { color: var(--c-teal); }
[data-palette="chroma"] .links-big li:nth-child(2) a:hover .v { color: var(--c-amber); }
[data-palette="chroma"] .links-big li:nth-child(3) a:hover .v { color: var(--c-sky); }
/* tables & spec */
[data-palette="chroma"] tr.hl td { color: var(--sc); }
[data-palette="chroma"] .spec dt { color: color-mix(in srgb, var(--sc, var(--c-teal)) 70%, var(--text-3)); }
[data-palette="chroma"] .foot h2 em { color: var(--c-coral); }
@media (max-width: 720px) { [data-palette="chroma"] .door + .door::before { left: 0; } }

/* ---------- 19. About: timeline details and focus grid ---------- */
.tl h3 a { text-decoration: none; }
.tl h3 a .arr { font: 400 13px var(--f-mono); color: var(--text-3); transition: color .2s, transform .2s; display: inline-block; }
.tl h3 a:hover .arr { color: var(--sc, var(--accent)); transform: translate(2px, -2px); }
.tl .place { font: 400 12px/1.6 var(--f-mono); color: var(--text-3); margin: 0 0 6px; }
.tl.now h3 { color: var(--sc, var(--accent)); }
.focus-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.focus { display: flex; flex-direction: column; gap: 10px; padding: 22px 22px 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; position: relative; transition: background .25s var(--ease); }
.focus:last-child:nth-child(odd) { grid-column: 1 / -1; }
.focus:hover { background: var(--bg-hover); color: inherit; }
.focus .fn { font: 400 12px var(--f-mono); color: var(--fc, var(--accent)); }
.focus h3 { font-size: 20px; margin: 0; }
.focus p { color: var(--text-2); font-size: 15px; line-height: 1.6; margin: 0; }
.focus .proof { margin-top: auto; padding-top: 6px; font: 400 12px var(--f-mono); color: var(--text-3); transition: color .2s; }
.focus:hover .proof { color: var(--fc, var(--accent)); }
.focus::before { content: ""; position: absolute; top: -1px; left: -1px; width: 28px; height: 2px; background: var(--fc, var(--accent)); }
[data-palette="chroma"] .focus:nth-child(1) { --fc: var(--c-teal); }
[data-palette="chroma"] .focus:nth-child(2) { --fc: var(--c-coral); }
[data-palette="chroma"] .focus:nth-child(3) { --fc: var(--c-amber); }
[data-palette="chroma"] .focus:nth-child(4) { --fc: var(--c-sky); }
[data-palette="chroma"] .focus:nth-child(5) { --fc: var(--c-green); }
@media (max-width: 720px) { .focus-grid { grid-template-columns: minmax(0, 1fr); } }

/* ---------- 20. About: experience ---------- */
.exp { border-top: 1px solid var(--line); }
.job { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 28px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.job .when { font: 400 12px var(--f-mono); color: var(--text-3); }
.job.now .when::before { content: "● "; color: var(--sc, var(--accent)); }
.job h3 { font-size: 20px; margin: 6px 0 6px; }
.job .roles { font: 400 12.5px/1.7 var(--f-mono); color: var(--sc, var(--accent)); margin: 0; }
.job ul { margin: 0; padding-left: 1.1em; }
.job li { color: var(--text-2); font-size: 15.5px; line-height: 1.65; margin-bottom: 0.5em; }
.job li::marker { content: "— "; color: var(--sc, var(--accent)); }
.job li strong { color: var(--text); font-weight: 500; }
@media (max-width: 720px) { .job { grid-template-columns: minmax(0, 1fr); gap: 12px; } }

/* Adaptive Recommender page: tab groups of any size, CI whiskers, formula and weekend boxes */
.pipe.pipe-9 { grid-template-columns: repeat(9, minmax(0, 1fr)); }
.pipe.pipe-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.pipe.pipe-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 960px) {
  .pipe.pipe-9, .pipe.pipe-6 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .pipe.pipe-9 button, .pipe.pipe-6 button { border-bottom: 1px solid var(--line); }
}
.pipe-detail h4 { font: 500 12px var(--f-mono); color: var(--accent); text-transform: lowercase; margin: 18px 0 6px; letter-spacing: .02em; }
.pipe-detail h4:first-child { margin-top: 0; }
.pipe-detail p { margin: 0 0 10px; }
.pipe-detail ul { padding-left: 1.1em; margin: 0 0 10px; }
.pipe-detail li { margin-bottom: .35em; }
.pipe-detail li::marker { color: var(--accent); content: "— "; }
.pipe-detail code, .note code { font-size: .88em; color: var(--text); background: var(--bg); border: 1px solid var(--line); padding: 1px 5px; border-radius: 3px; }
.formula { margin: 12px 0 14px; padding: 10px 14px; background: var(--bg); border: 1px solid var(--line); border-radius: 4px; overflow-x: auto; color: var(--text); }
svg .ci { stroke: var(--text-2); stroke-width: 1.2; }
.weekend { border: 1px solid var(--line); border-left: 2px solid var(--accent); background: var(--accent-bg); padding: 16px 20px; color: var(--text-2); font-size: 15px; max-width: 68ch; margin: 0 0 28px; }
.weekend strong { color: var(--text); font-weight: 500; }
.formula.sm { font-size: .8em; }
.formula .katex-display { margin: .2em 0; }
/* Diabetes Readmission page: plain-language boxes for non-technical readers */
.plain { border: 1px solid var(--line); border-left: 2px solid var(--signal); background: var(--signal-bg); padding: 14px 20px 10px; color: var(--text-2); font-size: 15px; line-height: 1.6; max-width: 72ch; margin: 0 0 28px; }
.plain .label { display: block; color: var(--signal); margin-bottom: 6px; }
.plain p { margin: 0 0 8px; }
.plain strong { color: var(--text); font-weight: 500; }