/* ==========================================================================
   Adisesh Sanklapur — portfolio
   Editorial layout · Bricolage Grotesque / Geist / Geist Mono · light + dark
   ========================================================================== */

:root {
  --bg: #f3f1ec;
  --bg-2: #e9e6df;
  --surface: #faf9f6;
  --ink: #121212;
  --ink-2: #47453f;
  --ink-3: #7a776f;
  --line: rgba(18, 18, 18, 0.12);
  --line-2: rgba(18, 18, 18, 0.24);
  --accent: #2b37f0;
  --accent-ink: #ffffff;
  --accent-soft: rgba(43, 55, 240, 0.09);
  --live: #16a34a;
  --miss: #d9542b;

  /* prompt-prefix colors for the router sim + diagrams */
  --p1: #2b37f0;
  --p2: #d9542b;
  --p3: #0f9d74;
  --p4: #c38a12;
  --p5: #a23fc4;

  --display: "Bricolage Grotesque", "Geist", ui-sans-serif, system-ui, sans-serif;
  --sans: "Geist", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  --maxw: 1320px;
  --gutter: clamp(16px, 4vw, 48px);
  --ease: cubic-bezier(0.2, 0.7, 0.1, 1);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0b0d;
    --bg-2: #151518;
    --surface: #111114;
    --ink: #eceae4;
    --ink-2: #aeaba3;
    --ink-3: #75726c;
    --line: rgba(255, 255, 255, 0.09);
    --line-2: rgba(255, 255, 255, 0.2);
    --accent: #8189ff;
    --accent-ink: #0b0b0d;
    --accent-soft: rgba(129, 137, 255, 0.12);
    --live: #3ddc84;
    --miss: #ff7a4d;
    --p1: #737aee;
    --p2: #e76437;
    --p3: #15ab7f;
    --p4: #bb8b09;
    --p5: #b762d4;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b0b0d;
  --bg-2: #151518;
  --surface: #111114;
  --ink: #eceae4;
  --ink-2: #aeaba3;
  --ink-3: #75726c;
  --line: rgba(255, 255, 255, 0.09);
  --line-2: rgba(255, 255, 255, 0.2);
  --accent: #8189ff;
  --accent-ink: #0b0b0d;
  --accent-soft: rgba(129, 137, 255, 0.12);
  --live: #3ddc84;
  --miss: #ff7a4d;
  --p1: #737aee;
  --p2: #e76437;
  --p3: #15ab7f;
  --p4: #bb8b09;
  --p5: #b762d4;
  color-scheme: dark;
}

/* --------------------------------------------------------------- base */
*,
*::before,
*::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background-color 0.4s var(--ease), color 0.4s var(--ease);
}

/* fine film grain for paper texture */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: 0.35;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .06 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
:root[data-theme="dark"] body::before { mix-blend-mode: screen; opacity: 0.25; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) body::before { mix-blend-mode: screen; opacity: 0.25; }
}

::selection { background: var(--accent); color: var(--accent-ink); }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg, canvas { display: block; }
ul, ol { list-style: none; }
b, strong { font-weight: 600; }
em { font-style: italic; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.mono { font-family: var(--mono); font-size: 12px; letter-spacing: 0.02em; text-transform: uppercase; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }

.skip {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  padding: 10px 14px; background: var(--ink); color: var(--bg); border-radius: 8px;
}
.skip:focus { top: 12px; }

.live-dot {
  display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--live); margin-right: 8px; vertical-align: 1px;
  box-shadow: 0 0 0 0 var(--live);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--live) 55%, transparent); }
  70% { box-shadow: 0 0 0 7px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

.arrow { display: inline-block; transition: transform 0.3s var(--ease); }

/* --------------------------------------------------------------- buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 44px; padding: 0 20px; border-radius: 999px;
  font-size: 14px; font-weight: 500; white-space: nowrap;
  transition: transform 0.25s var(--ease), background-color 0.25s, color 0.25s, border-color 0.25s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-accent { background: var(--accent); color: var(--accent-ink); }
.btn-ink { background: var(--ink); color: var(--bg); }
.btn-line { border: 1px solid var(--line-2); }
.btn-line:hover { border-color: var(--ink); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips span {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.01em;
  padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-2);
}

.badge {
  display: inline-flex; align-items: center; gap: 0;
  font-size: 10.5px; padding: 3px 9px 3px 8px; border-radius: 999px;
  border: 1px solid var(--line-2); color: var(--ink-2); vertical-align: middle;
  font-family: var(--mono); letter-spacing: 0.04em;
}
.badge .live-dot { width: 6px; height: 6px; margin-right: 6px; }
.badge-accent { background: var(--accent); color: var(--accent-ink); border-color: transparent; }

/* --------------------------------------------------------------- nav */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  height: 64px; padding: 0 var(--gutter);
  transition: background-color 0.3s, border-color 0.3s, backdrop-filter 0.3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom-color: var(--line);
}
.mark { display: flex; align-items: center; gap: 12px; }
.mark-glyph {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: var(--ink); color: var(--bg);
  font-family: var(--display); font-size: 17px; font-style: italic; letter-spacing: 0.02em;
  transition: background-color 0.3s, transform 0.5s var(--ease);
}
.mark:hover .mark-glyph { background: var(--accent); color: var(--accent-ink); transform: rotate(-12deg); }
.mark-name { font-weight: 500; font-size: 14.5px; letter-spacing: -0.01em; }

.nav-links { display: flex; gap: 4px; }
.nav-links a {
  position: relative; padding: 8px 12px; font-size: 14px; color: var(--ink-2);
  border-radius: 999px; transition: color 0.2s, background-color 0.2s;
}
.nav-links a:hover { color: var(--ink); background: var(--accent-soft); }
.nav-links a.active { color: var(--ink); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; width: 4px; height: 4px;
  margin-left: -2px; border-radius: 50%; background: var(--accent);
}

.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-actions .btn { height: 38px; padding: 0 16px; }
.kbd-btn {
  display: inline-flex; align-items: center; gap: 8px; height: 38px; padding: 0 12px 0 8px;
  border: 1px solid var(--line-2); border-radius: 999px; font-size: 13px; color: var(--ink-2);
  transition: border-color 0.2s, color 0.2s;
}
.kbd-btn:hover { border-color: var(--ink); color: var(--ink); }
.kbd-k {
  font-family: var(--mono); font-size: 11px; padding: 2px 6px; border-radius: 6px;
  background: var(--bg-2); color: var(--ink);
}
.icon-btn {
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line-2); transition: border-color 0.2s, transform 0.4s var(--ease);
}
.icon-btn:hover { border-color: var(--ink); transform: rotate(20deg); }
.icon-btn svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; }
.i-moon { display: none !important; }
:root[data-theme="dark"] .i-sun { display: none !important; }
:root[data-theme="dark"] .i-moon { display: block !important; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: none !important; }
  :root:not([data-theme="light"]) .i-moon { display: block !important; }
}


/* --------------------------------------------------------------- hero */
.hero { padding: 88px 0 64px; position: relative; }
.hero-meta {
  display: flex; justify-content: space-between; gap: 16px;
  padding: 14px 0; border-top: 1px solid var(--ink); border-bottom: 1px solid var(--line);
  color: var(--ink-2);
}
.hero-name {
  font-family: var(--display); font-weight: 400;
  font-size: clamp(76px, 16vw, 250px);
  line-height: 0.84; letter-spacing: -0.035em;
  margin: clamp(20px, 2.4vw, 32px) 0 clamp(24px, 2.8vw, 40px);
}
.hero-name .line { display: block; overflow: hidden; padding-bottom: 0.06em; }
.hero-name .word { display: inline-block; }
.hero-dot { color: var(--accent); }

.hero-lede {
  font-size: clamp(20px, 2vw, 25px); line-height: 1.4; letter-spacing: -0.015em;
  color: var(--ink); max-width: 30ch;
}
mark { background: none; color: var(--accent); font-weight: 600; background-image: linear-gradient(var(--accent-soft), var(--accent-soft)); background-size: 100% 38%; background-position: 0 88%; background-repeat: no-repeat; padding: 0 0.08em; }

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

/* live router sim */
.sim {
  background: var(--surface); border: 1px solid var(--line-2); border-radius: 18px;
  overflow: hidden; position: relative;
  box-shadow: 0 1px 0 var(--line), 0 30px 60px -40px rgba(0, 0, 0, 0.35);
}
.sim-head {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; border-bottom: 1px solid var(--line); font-size: 11px; color: var(--ink-2);
}
.sim-legend { display: flex; align-items: center; gap: 6px; }
.sim-legend i { display: inline-block; width: 8px; height: 8px; border-radius: 2px; }
.sim-legend i + i { margin-left: 8px; }
.lg-hit { background: var(--live); }
.lg-miss { background: var(--miss); }
#sim-canvas { width: 100%; height: clamp(250px, 24vw, 320px); }
.sim-stats {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}
.sim-stats > div { padding: 12px 16px; display: flex; flex-direction: column; gap: 2px; }
.sim-stats > div + div { border-left: 1px solid var(--line); }
.sim-stats .k { font-size: 10.5px; color: var(--ink-3); }
.sim-stats .v { font-size: 18px; color: var(--ink); text-transform: none; font-variant-numeric: tabular-nums; }
.sim figcaption {
  padding: 10px 16px 14px; font-size: 10.5px; line-height: 1.6; color: var(--ink-3);
  text-transform: none; letter-spacing: 0; border-top: 1px dashed var(--line);
}
.sim figcaption a { color: var(--accent); }

/* --------------------------------------------------------------- ticker */
.ticker {
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  overflow: hidden; padding: 18px 0;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track { display: flex; width: max-content; animation: marquee 48s linear infinite; }
.ticker:hover .ticker-track { animation-play-state: paused; }
.ticker-set { display: flex; align-items: center; flex-shrink: 0; }
.ticker span {
  font-family: var(--display); font-size: clamp(24px, 2.8vw, 38px); white-space: nowrap; padding: 0 28px;
  letter-spacing: -0.01em;
}
.ticker i { font-style: normal; color: var(--accent); font-size: 18px; }
@keyframes marquee { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .ticker-track { animation: none; }
  .ticker { overflow-x: auto; }
}

/* --------------------------------------------------------------- sections */
.section { padding: clamp(96px, 12vw, 170px) 0 0; }
.sec-head {
  display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 20px;
  padding-bottom: 28px; margin-bottom: 8px; border-bottom: 1px solid var(--ink);
}
.sec-idx {
  display: inline-block; vertical-align: top; margin: 0.35em 0 0 0.3em;
  font-size: 12px; font-weight: 500; letter-spacing: 0.04em; line-height: 1;
  padding: 5px 9px; border-radius: 999px; border: 1px solid var(--accent); color: var(--accent);
}
.sec-title {
  font-family: var(--display); font-weight: 400; font-size: clamp(52px, 8vw, 116px);
  line-height: 0.9; letter-spacing: -0.03em;
}
.sec-note { color: var(--ink-2); max-width: 34ch; text-align: right; font-size: 15px; padding-bottom: 8px; }

/* --------------------------------------------------------------- experience */
.xp-row {
  position: relative;
  display: grid; grid-template-columns: 180px minmax(0, 1fr) minmax(0, 1.35fr); gap: 32px;
  padding: 38px 0; border-bottom: 1px solid var(--line);
  transition: background-color 0.35s;
}
.xp-row::before {
  content: ""; position: absolute; left: calc(var(--gutter) * -1); top: 0; bottom: 0; width: 2px;
  background: var(--accent); transform: scaleY(0); transform-origin: top;
  transition: transform 0.5s var(--ease);
}
.xp-row:hover::before { transform: scaleY(1); }
.xp-when { display: flex; flex-direction: column; gap: 6px; color: var(--ink-3); font-size: 11.5px; padding-top: 8px; }
.xp-when span:first-child { color: var(--ink); }
.xp-org {
  font-family: var(--display); font-weight: 400; font-size: clamp(30px, 3vw, 42px);
  line-height: 1.05; letter-spacing: -0.02em;
}
.xp-org .badge { margin-left: 8px; position: relative; top: -6px; }
.xp-org a:hover { color: var(--accent); }
.xp-org a:hover .arrow { transform: translate(3px, -3px); }
.xp-org .arrow { font-family: var(--sans); font-size: 0.55em; vertical-align: 0.4em; }
.xp-role { margin-top: 8px; font-weight: 500; font-size: 16px; }
.xp-ctx { margin-top: 4px; color: var(--ink-3); font-size: 14px; line-height: 1.45; }
.xp-body { padding-top: 8px; }
.xp-body p, .xp-body li { color: var(--ink-2); font-size: 15.5px; line-height: 1.6; }
.xp-body b { color: var(--ink); }
.xp-body ul { display: grid; gap: 10px; margin-bottom: 20px; }
.xp-body > p { margin-bottom: 20px; font-size: 17px; color: var(--ink); }
.xp-body li { position: relative; padding-left: 20px; }
.xp-body li::before {
  content: ""; position: absolute; left: 0; top: 0.75em; width: 9px; height: 1px; background: var(--accent);
}

/* --------------------------------------------------------------- research */
.paper {
  margin-top: 40px;
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  border: 1px solid var(--line-2); border-radius: 22px; overflow: hidden;
  background: var(--surface);
}
.paper-main { padding: clamp(28px, 4vw, 56px); display: flex; flex-direction: column; gap: 24px; }
.paper-venue { display: flex; align-items: center; gap: 12px; color: var(--ink-3); font-size: 11px; }
.paper-title {
  font-family: var(--display); font-weight: 400; font-size: clamp(34px, 3.6vw, 54px);
  line-height: 1.02; letter-spacing: -0.02em; text-wrap: balance;
}
.paper-abs { color: var(--ink-2); font-size: 16.5px; line-height: 1.65; max-width: 58ch; }
.paper-links { display: flex; flex-wrap: wrap; gap: 10px; }
.paper-side {
  border-left: 1px solid var(--line); background: var(--bg-2);
  display: flex; flex-direction: column;
}
.collapse { padding: 28px 28px 8px; }
.collapse svg { width: 100%; height: auto; }
.collapse-labels { display: flex; justify-content: space-between; font-size: 10.5px; color: var(--ink-3); padding: 6px 4px 0; }
.findings { margin-top: auto; }
.findings > div {
  display: grid; grid-template-columns: 1fr auto; align-items: baseline; column-gap: 16px;
  padding: 18px 28px; border-top: 1px solid var(--line);
}
.findings dt { color: var(--ink-3); font-size: 10.5px; grid-column: 1 / -1; }
.findings dd {
  font-family: var(--display); font-size: clamp(40px, 3.8vw, 56px); line-height: 1; letter-spacing: -0.02em;
  grid-column: 1; margin-top: 6px;
}
.findings dd small { font-size: 0.5em; margin-left: 2px; }
.findings > div:first-child dd { color: var(--accent); }
.findings p { grid-column: 2; color: var(--ink-2); font-size: 13.5px; max-width: 22ch; text-align: right; line-height: 1.4; }

/* --------------------------------------------------------------- case studies */
.case {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px);
  padding: clamp(48px, 6vw, 80px) 0; border-bottom: 1px solid var(--line); align-items: center;
}
.case-flip .case-viz { order: 2; }
.case-viz {
  position: relative; aspect-ratio: 4 / 3; border-radius: 22px; overflow: hidden;
  background: var(--bg-2); border: 1px solid var(--line);
}
.case-viz svg { width: 100%; height: 100%; }
.case-viz-tag {
  position: absolute; left: 16px; bottom: 14px; font-size: 10.5px; color: var(--ink-3);
  background: var(--surface); padding: 5px 10px; border-radius: 999px; border: 1px solid var(--line);
}
.case-kicker { color: var(--ink-3); display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.award { color: var(--accent); }
.case-title {
  font-family: var(--display); font-weight: 400; font-size: clamp(38px, 4.2vw, 62px);
  line-height: 0.98; letter-spacing: -0.025em; margin: 14px 0 18px; text-wrap: balance;
}
.case-lede { font-size: 18px; line-height: 1.5; color: var(--ink-2); max-width: 46ch; }
.case-metrics {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  margin: 28px 0; border-top: 1px solid var(--line-2);
}
.case-metrics > div { padding: 14px 16px 0 0; display: flex; flex-direction: column; gap: 4px; }
.case-metrics b {
  font-family: var(--display); font-weight: 400; font-size: 36px; line-height: 1; letter-spacing: -0.02em;
}
.case-metrics span { font-size: 12.5px; color: var(--ink-3); line-height: 1.35; }
.case-list { display: grid; gap: 10px; margin-bottom: 22px; }
.case-list li { position: relative; padding-left: 20px; color: var(--ink-2); font-size: 15.5px; }
.case-list li::before {
  content: ""; position: absolute; left: 0; top: 0.75em; width: 9px; height: 1px; background: var(--accent);
}
.case-list b { color: var(--ink); }
.case-link {
  display: inline-flex; gap: 8px; margin-top: 26px; font-weight: 500;
  padding-bottom: 3px; border-bottom: 1px solid var(--ink);
  transition: color 0.2s, border-color 0.2s;
}
.case-link:hover { color: var(--accent); border-color: var(--accent); }
.case-link:hover .arrow { transform: translate(3px, -3px); }

/* svg diagram strokes */
.d-edge { stroke: var(--line-2); stroke-width: 1.2; fill: none; }
.d-edge-hot { stroke: var(--accent); stroke-width: 2; fill: none; stroke-linecap: round; }
.d-node { fill: var(--surface); stroke: var(--ink-3); stroke-width: 1.2; }
.d-node-hot { fill: var(--accent); stroke: var(--accent); }
.d-label { font-family: var(--mono); font-size: 10px; fill: var(--ink-3); letter-spacing: 0.03em; }
.d-label-ink { fill: var(--ink); }
.d-box { fill: var(--surface); stroke: var(--line-2); stroke-width: 1; }
.d-box-hot { stroke: var(--accent); stroke-width: 1.6; }
.d-dot { fill: var(--ink-3); }
.d-flow { stroke-dasharray: 4 6; animation: dash 1.4s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -20; } }
@media (prefers-reduced-motion: reduce) { .d-flow { animation: none; } }

/* --------------------------------------------------------------- archive */
.archive { margin-top: clamp(64px, 8vw, 100px); }
.archive-head { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 14px; border-bottom: 1px solid var(--ink); }
.archive-head .mono { color: var(--ink-3); }
.archive-title { font-family: var(--display); font-weight: 400; font-size: 40px; letter-spacing: -0.02em; }
.archive-list a {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 2fr) minmax(0, 1fr) 24px; gap: 24px;
  align-items: baseline; padding: 20px 0; border-bottom: 1px solid var(--line);
  transition: padding 0.35s var(--ease), background-color 0.35s;
}
.a-name { font-weight: 500; font-size: 17px; transition: color 0.2s; }
.a-desc { color: var(--ink-2); font-size: 15px; }
.a-desc em { font-style: normal; color: var(--accent); white-space: nowrap; }
.a-stack { color: var(--ink-3); font-size: 11px; text-transform: none; }
.archive-list .arrow { justify-self: end; color: var(--ink-3); }
.archive-list a:hover { padding-left: 14px; padding-right: 14px; background: var(--accent-soft); }
.archive-list a:hover .a-name { color: var(--accent); }
.archive-list a:hover .arrow { transform: translate(3px, -3px); color: var(--accent); }

/* --------------------------------------------------------------- toolkit */
.kit { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 40px; }
.kit-col { padding: 0 24px 0 0; }
.kit-col + .kit-col { padding-left: 24px; border-left: 1px solid var(--line); }
.kit-h { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; font-weight: 400; color: var(--ink); }
.kit-h span {
  display: grid; place-items: center; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink); font-size: 10.5px;
}
.kit-col p { font-size: 16px; color: var(--ink-2); line-height: 1.75; }

.edu {
  margin-top: clamp(56px, 7vw, 96px);
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 72px);
  padding: clamp(28px, 4vw, 48px); border-radius: 22px; background: var(--ink); color: var(--bg);
}
.edu-k { color: color-mix(in srgb, var(--bg) 60%, transparent); }
.edu-school {
  font-family: var(--display); font-weight: 400; font-size: clamp(36px, 4vw, 58px);
  line-height: 1; letter-spacing: -0.02em; margin: 14px 0 12px;
}
.edu-deg { font-size: 18px; }
.edu-deg .mono { color: color-mix(in srgb, var(--bg) 60%, transparent); font-size: 12px; }
.edu-course { margin-top: 28px; font-size: 15px; line-height: 1.6; color: color-mix(in srgb, var(--bg) 78%, transparent); }
.edu-course .mono { display: block; margin-bottom: 6px; color: color-mix(in srgb, var(--bg) 55%, transparent); font-size: 11px; }
.honors { align-self: center; }
.honors li {
  display: grid; grid-template-columns: 130px 1fr; align-items: baseline; gap: 16px;
  padding: 12px 0; border-bottom: 1px solid color-mix(in srgb, var(--bg) 18%, transparent);
}
.honors li:first-child { border-top: 1px solid color-mix(in srgb, var(--bg) 18%, transparent); }
.h-v { font-family: var(--display); font-size: 26px; line-height: 1; }
.h-l { font-size: 14px; color: color-mix(in srgb, var(--bg) 72%, transparent); }

/* --------------------------------------------------------------- about */
.about-grid {
  display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 40px clamp(32px, 5vw, 80px);
}
.about-grid .sec-head { grid-column: 1 / -1; grid-template-columns: 1fr; }
.about-copy { display: grid; gap: 18px; align-content: start; padding-top: 24px; }
.about-copy p { color: var(--ink-2); font-size: 17px; line-height: 1.7; max-width: 60ch; }
.about-copy .about-lead {
  font-family: var(--display); color: var(--ink); font-size: clamp(28px, 2.8vw, 38px); line-height: 1.18; letter-spacing: -0.015em;
}

.piano-card {
  margin-top: 24px; align-self: start;
  border: 1px solid var(--line-2); border-radius: 18px; background: var(--surface); overflow: hidden;
}
.piano-head {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 12px 16px; border-bottom: 1px solid var(--line); font-size: 11px; color: var(--ink-2);
}
.piano-play {
  font-family: var(--mono); font-size: 11px; text-transform: uppercase; letter-spacing: 0.03em;
  padding: 6px 12px; border-radius: 999px; background: var(--accent); color: var(--accent-ink);
  transition: opacity 0.2s, transform 0.2s;
}
.piano-play:hover { transform: translateY(-1px); }
.piano-play:disabled { opacity: 0.55; cursor: default; transform: none; }
.piano-keys { position: relative; display: flex; height: 190px; padding: 16px; gap: 3px; }
.wkey {
  flex: 1; border-radius: 0 0 8px 8px; background: #f7f5f0; border: 1px solid rgba(18, 18, 18, 0.2);
  position: relative; display: flex; align-items: flex-end; justify-content: center; padding-bottom: 10px;
  font-family: var(--mono); font-size: 10px; color: #7a776f;
  transition: background-color 0.12s, transform 0.12s;
  transform-origin: top;
}
.bkey {
  position: absolute; top: 16px; width: 7%; height: 58%; border-radius: 0 0 6px 6px;
  background: #141414; z-index: 2; transition: background-color 0.12s, transform 0.12s;
  transform-origin: top;
}
.wkey.on { background: var(--accent); color: var(--accent-ink); transform: scaleY(0.985); }
.bkey.on { background: var(--accent); transform: scaleY(0.97); }
.piano-foot { padding: 0 16px 14px; font-size: 10.5px; color: var(--ink-3); }

/* --------------------------------------------------------------- contact */
.contact {
  margin-top: clamp(110px, 14vw, 190px);
  background: var(--accent); color: var(--accent-ink);
  padding: clamp(72px, 9vw, 130px) 0 28px;
  position: relative; overflow: hidden;
}
.outline { color: transparent; -webkit-text-stroke: 2px var(--accent-ink); }
.contact ::selection { background: var(--accent-ink); color: var(--accent); }
.contact-k { opacity: 0.75; }
.contact-title {
  font-family: var(--display); font-weight: 400; font-size: clamp(64px, 12vw, 190px);
  line-height: 0.88; letter-spacing: -0.035em; margin: 24px 0 clamp(40px, 5vw, 64px);
}
.contact-row { margin-bottom: clamp(40px, 5vw, 64px); }
.email-btn {
  display: inline-flex; align-items: baseline; gap: 16px; flex-wrap: wrap; text-align: left;
  font-size: clamp(22px, 3.4vw, 46px); letter-spacing: -0.02em;
  border-bottom: 2px solid currentColor; padding-bottom: 6px;
  transition: gap 0.3s var(--ease);
}
.email-btn:hover { gap: 24px; }
.email-text { overflow-wrap: anywhere; }
.email-hint { font-size: 11px; opacity: 0.75; }
.contact-links { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); border-top: 1px solid color-mix(in srgb, currentColor 30%, transparent); }
.contact-links a {
  display: flex; align-items: center; gap: 14px; padding: 22px 0; font-size: clamp(18px, 1.8vw, 24px);
  border-bottom: 1px solid color-mix(in srgb, currentColor 30%, transparent);
}
.contact-links li + li a { padding-left: 20px; }
.contact-links li + li { border-left: 1px solid color-mix(in srgb, currentColor 30%, transparent); }
.contact-links .mono { font-size: 10.5px; opacity: 0.7; }
.contact-links .arrow { margin-left: auto; margin-right: 16px; }
.contact-links a:hover .arrow { transform: translate(4px, -4px); }
.footer {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: clamp(64px, 8vw, 110px); font-size: 10.5px; opacity: 0.8;
}
.footer kbd { font-family: var(--mono); padding: 1px 5px; border: 1px solid currentColor; border-radius: 4px; }

/* --------------------------------------------------------------- command palette */
.palette { position: fixed; inset: 0; z-index: 150; display: grid; place-items: start center; padding: 14vh 16px 16px; }
.palette[hidden] { display: none; }
.palette-scrim { position: absolute; inset: 0; background: rgba(8, 8, 10, 0.45); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); animation: fade 0.2s; }
.palette-box {
  position: relative; width: min(600px, 100%);
  background: var(--surface); color: var(--ink); border: 1px solid var(--line-2); border-radius: 18px;
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.45); overflow: hidden;
  animation: pop 0.24s var(--ease);
}
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { opacity: 0; transform: translateY(-8px) scale(0.98); } }
.palette-input-row { display: flex; align-items: center; gap: 12px; padding: 16px 18px; border-bottom: 1px solid var(--line); }
.palette-input-row svg { width: 18px; height: 18px; fill: none; stroke: var(--ink-3); stroke-width: 1.8; stroke-linecap: round; flex-shrink: 0; }
.palette-input-row input {
  flex: 1; min-width: 0; border: 0; outline: 0; background: none; color: var(--ink); font: inherit; font-size: 17px;
}
.palette-input-row input::placeholder { color: var(--ink-3); }
.palette-input-row kbd, .palette-item kbd {
  font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); padding: 2px 6px;
  border: 1px solid var(--line-2); border-radius: 5px;
}
.palette-list { max-height: min(52vh, 420px); overflow-y: auto; padding: 8px; }
.palette-group { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; color: var(--ink-3); padding: 10px 10px 6px; letter-spacing: 0.04em; }
.palette-item {
  display: flex; align-items: center; gap: 12px; padding: 11px 12px; border-radius: 10px; cursor: pointer; font-size: 15px;
}
.palette-item .pi-ic {
  display: grid; place-items: center; width: 28px; height: 28px; border-radius: 8px;
  background: var(--bg-2); font-family: var(--mono); font-size: 12px; color: var(--ink-2); flex-shrink: 0;
}
.palette-item .pi-sub { color: var(--ink-3); font-size: 13px; margin-left: auto; text-align: right; }
.palette-item[aria-selected="true"] { background: var(--accent); color: var(--accent-ink); }
.palette-item[aria-selected="true"] .pi-ic { background: color-mix(in srgb, var(--accent-ink) 18%, transparent); color: var(--accent-ink); }
.palette-item[aria-selected="true"] .pi-sub { color: color-mix(in srgb, var(--accent-ink) 75%, transparent); }
.palette-empty { padding: 26px; text-align: center; color: var(--ink-3); }
.palette-foot { display: flex; gap: 18px; padding: 10px 18px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 10.5px; }

/* --------------------------------------------------------------- toast */
.toast {
  position: fixed; left: 50%; bottom: 28px; z-index: 160;
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  padding: 10px 16px; border-radius: 999px; background: var(--ink); color: var(--bg); font-size: 11.5px;
  transition: opacity 0.3s, transform 0.3s var(--ease);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* --------------------------------------------------------------- motion (only with JS + motion OK) */
.anim .reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.anim .reveal.in { opacity: 1; transform: none; }
.anim .hero-name .word { transform: translateY(105%); transition: transform 1.1s var(--ease); }
.anim .hero-name .line:nth-child(2) .word { transition-delay: 0.08s; }
.anim .hero-dot { opacity: 0; transition: opacity 0.4s 0.8s; display: inline-block; }
.anim.loaded .hero-name .word { transform: none; }
.anim.loaded .hero-dot { opacity: 1; }


/* --------------------------------------------------------------- display type
   Bricolage Grotesque: heavy + condensed at poster sizes, calmer as it shrinks */
.hero-name, .sec-title, .contact-title {
  font-weight: 800; font-stretch: 82%;
  font-variation-settings: "opsz" 96;
}
.hero-name { letter-spacing: -0.03em; line-height: 0.82; font-size: clamp(60px, 10.8vw, 168px); }
.sec-title { letter-spacing: -0.03em; line-height: 0.86; }
.contact-title { letter-spacing: -0.03em; line-height: 0.84; }
.paper-title, .case-title, .xp-org, .edu-school, .archive-title, .graph-title {
  font-weight: 700; font-stretch: 90%; letter-spacing: -0.035em; font-variation-settings: "opsz" 48;
}
.xp-org { font-size: clamp(26px, 2.6vw, 36px); }
.paper-title { line-height: 1.02; }
.b-num, .findings dd, .case-metrics b, .h-v {
  font-weight: 700; font-stretch: 85%; letter-spacing: -0.04em; font-variant-numeric: tabular-nums;
}
.about-copy .about-lead { font-weight: 500; letter-spacing: -0.03em; line-height: 1.15; font-variation-settings: "opsz" 36; }
.mark-glyph { font-style: normal; font-weight: 800; font-size: 13px; letter-spacing: -0.02em; }
.ticker span { font-weight: 700; font-stretch: 85%; letter-spacing: -0.03em; text-transform: uppercase; font-size: clamp(22px, 2.6vw, 34px); }
.ticker-set span:nth-of-type(even) { color: transparent; -webkit-text-stroke: 1.2px var(--ink); }

/* hero letters react to the pointer (variable weight + width) */
.hero-name .ch { display: inline-block; transition: font-variation-settings 0.5s var(--ease); font-variation-settings: "wght" 800, "wdth" 82, "opsz" 96; }
.hero-name .ch.live { transition: none; }
.hero-title { position: relative; }
.sticker {
  position: absolute; right: 0; top: 4%; width: clamp(96px, 9.5vw, 136px); aspect-ratio: 1;
  display: grid; place-items: center; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink);
  transition: transform 0.4s var(--ease);
}
.sticker:hover { transform: scale(1.06) rotate(-8deg); }
.sticker svg { position: absolute; inset: 0; width: 100%; height: 100%; animation: spin 18s linear infinite; }
.sticker text { font-family: var(--mono); font-size: 9.6px; letter-spacing: 0.08em; fill: currentColor; }
.sticker-core { font-size: clamp(22px, 2.4vw, 32px); font-weight: 600; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .sticker svg { animation: none; } }

/* --------------------------------------------------------------- results bento */
.bento {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px;
  padding-top: clamp(56px, 7vw, 96px);
}
.b-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 22px 24px 20px; border: 1px solid var(--line-2); border-radius: 20px; background: var(--surface);
  transition: border-color 0.3s, transform 0.4s var(--ease);
}
.b-card:hover { border-color: var(--ink); }
.b-wide { grid-column: span 2; }
.b-k { display: flex; justify-content: space-between; color: var(--ink-3); font-size: 10.5px; }
.b-num { font-family: var(--display); font-size: clamp(56px, 6vw, 88px); line-height: 0.9; margin-top: 8px; }
.b-num small { font-size: 0.45em; margin-left: 4px; letter-spacing: -0.02em; }
.b-card:nth-child(1) .b-num, .b-card:nth-child(4) .b-num { color: var(--accent); }
.b-l { color: var(--ink-2); font-size: 14.5px; line-height: 1.45; max-width: 46ch; }
.b-foot { margin-top: auto; padding-top: 14px; color: var(--ink-3); font-size: 10.5px; text-transform: none; display: flex; align-items: center; gap: 6px; }
.sw { display: inline-block; width: 9px; height: 9px; border-radius: 2px; }
.sw-ink { background: var(--ink-3); opacity: 0.45; }
.sw-accent { background: var(--accent); margin-left: 8px; }

.bars { display: grid; gap: 10px; margin-top: 14px; }
.bar-row { display: grid; grid-template-columns: 92px 1fr 34px; align-items: center; gap: 12px; }
.bar-l { font-size: 13px; color: var(--ink-2); }
.bar-v { font-size: 12px; color: var(--ink); text-align: right; }
.bar-track { position: relative; height: 16px; }
.bar {
  position: absolute; left: 0; top: 0; bottom: 0; width: calc(var(--v) * 1%);
  background: color-mix(in srgb, var(--ink-3) 45%, transparent); border-radius: 0 4px 4px 0;
  transform-origin: left; transition: transform 1.2s var(--ease), filter 0.2s;
}
.bar-accent { background: var(--accent); }
.bars-pairs .bar-track { height: 22px; }
.bars-pairs .bar:first-child { top: 0; bottom: 12px; }
.bars-pairs .bar-accent { top: 12px; bottom: 0; }
.bar:hover { filter: brightness(1.15); }
.anim .bento .bar { transform: scaleX(0); }
.anim .bento .in .bar { transform: none; }
.anim .bento .in .bar-accent { transition-delay: 0.25s; }

.logscale { position: relative; margin-top: 18px; height: 64px; }
.ls-axis { position: absolute; left: 0; right: 0; bottom: 0; display: flex; justify-content: space-between; font-size: 10px; color: var(--ink-3); text-transform: none; border-top: 1px solid var(--line-2); padding-top: 6px; }
.ls-band {
  position: absolute; left: 66.7%; right: 0; top: 10px; bottom: 26px; border-radius: 4px;
  background: repeating-linear-gradient(135deg, color-mix(in srgb, var(--miss) 30%, transparent) 0 2px, transparent 2px 7px);
  border: 1px solid color-mix(in srgb, var(--miss) 60%, transparent);
}
.ls-band span, .ls-mark span { position: absolute; top: -16px; left: 0; font-size: 9.5px; color: var(--ink-2); white-space: nowrap; text-transform: none; }
.ls-mark { position: absolute; left: calc(var(--x) * 1%); top: 10px; bottom: 26px; width: 2px; background: var(--accent); }
.ls-mark::after { content: ""; position: absolute; left: -5px; top: 50%; margin-top: -6px; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 2px var(--surface); }
.ls-mark span { left: -2px; color: var(--accent); }

.waffle { display: grid; grid-template-columns: repeat(50, 1fr); gap: 3px; margin-top: 16px; }
.waffle i { aspect-ratio: 1; border-radius: 50%; background: var(--accent); }
.waffle i:nth-child(3n) { opacity: 0.75; }
.anim .waffle i { transform: scale(0); transition: transform 0.4s var(--ease); transition-delay: calc(var(--d) * 1ms); }
.anim .in .waffle i { transform: none; }

/* --------------------------------------------------------------- experience timeline */
.gantt { margin: 36px 0 12px; }
.g-axis { position: relative; height: 20px; margin-left: var(--g-label); font-size: 10.5px; color: var(--ink-3); }
.g-axis span { position: absolute; top: 0; transform: translateX(-50%); }
.g-rows { position: relative; }
.g-row { display: grid; grid-template-columns: var(--g-label) 1fr; align-items: center; height: 34px; }
.g-name { font-size: 13.5px; color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding-right: 12px; }
.g-track { position: relative; height: 100%; }
.g-track::before { content: ""; position: absolute; left: 0; right: 0; top: 50%; border-top: 1px dashed var(--line); }
.g-bar {
  position: absolute; top: 9px; bottom: 9px; border-radius: 4px; background: color-mix(in srgb, var(--ink-3) 55%, transparent);
  transform-origin: left; transition: transform 1s var(--ease), filter 0.2s; cursor: pointer;
}
.g-bar.now { background: var(--accent); border-radius: 4px 0 0 4px; }
.g-bar.now::after { content: ""; position: absolute; right: -8px; top: 50%; margin-top: -6px; border: 6px solid transparent; border-left: 8px solid var(--accent); border-right: 0; }
.g-bar:hover { filter: brightness(1.2); }
.g-grid { position: absolute; inset: 0 0 0 var(--g-label); pointer-events: none; }
.g-grid i { position: absolute; top: 0; bottom: 0; border-left: 1px solid var(--line); }
.g-grid i.today { border-left: 1px solid var(--accent); }
.g-grid i.today::before { content: "today"; position: absolute; top: -22px; left: -16px; font-family: var(--mono); font-size: 10px; color: var(--accent); background: var(--bg); padding: 0 3px; }
.anim .gantt .g-bar { transform: scaleX(0); }
.anim .gantt.in .g-bar { transform: none; }

/* --------------------------------------------------------------- research micro bars */
.mini { grid-column: 1 / -1; position: relative; height: 6px; margin-top: 10px; border-radius: 3px; background: var(--line); }
.mini i { position: absolute; top: 0; bottom: 0; border-radius: 3px; background: var(--accent); }
.findings > div:nth-child(2) .mini i { background: var(--miss); }
.findings p { grid-row: 2; }

/* --------------------------------------------------------------- skills graph */
.graph { margin-top: 40px; border: 1px solid var(--line-2); border-radius: 22px; background: var(--surface); overflow: hidden; }
.graph-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; padding: 20px 24px; border-bottom: 1px solid var(--line); }
.graph-title { font-family: var(--display); font-size: clamp(24px, 2.4vw, 32px); line-height: 1; }
.graph-hint { color: var(--ink-3); font-size: 10.5px; }
.graph-body {
  position: relative; display: grid; grid-template-columns: minmax(0, 1fr) minmax(60px, 1.3fr) minmax(0, 1fr);
  padding: 24px; gap: 0;
}
.g-links { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
.g-col { display: flex; flex-direction: column; justify-content: space-between; gap: 6px; position: relative; z-index: 1; }
.g-left { grid-column: 1; }
.g-right { grid-column: 3; align-items: flex-end; }
.g-node {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--line-2); background: var(--surface); font-size: 13.5px; line-height: 1.2; text-align: left;
  transition: background-color 0.25s, color 0.25s, border-color 0.25s, opacity 0.25s;
}
.g-left .g-node { font-weight: 500; }
.g-node .deg { font-family: var(--mono); font-size: 10px; color: var(--ink-3); }
.g-node.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.g-node.on .deg { color: inherit; opacity: 0.8; }
.g-node.dim { opacity: 0.35; }
.g-link { fill: none; stroke: var(--line-2); stroke-width: 1.2; transition: stroke 0.25s, opacity 0.25s, stroke-width 0.25s; }
.g-link.on { stroke: var(--accent); stroke-width: 2; }
.g-link.dim { opacity: 0.25; }

/* --------------------------------------------------------------- chart tooltip */
.tip {
  position: fixed; z-index: 170; pointer-events: none; left: 0; top: 0;
  padding: 7px 10px; border-radius: 8px; background: var(--ink); color: var(--bg);
  font-size: 11px; text-transform: none; letter-spacing: 0; white-space: nowrap;
  opacity: 0; transform: translate(-50%, calc(-100% - 12px)); transition: opacity 0.15s;
}
.tip.show { opacity: 1; }

@media (max-width: 1080px) {
  .bento { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .b-wide { grid-column: span 2; }
}
@media (max-width: 760px) {
  .bento { grid-template-columns: 1fr; }
  .b-wide { grid-column: auto; }
  .waffle { grid-template-columns: repeat(25, 1fr); }
  .sticker { top: 0; width: 72px; }
  .gantt { --g-label: 86px !important; }
  .g-name { font-size: 12px; }
  .graph-body { grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1fr); padding: 18px 14px; }
  .g-node { font-size: 12px; padding: 5px 9px; }
  .g-node .deg { display: none; }
}


/* --------------------------------------------------------------- hero bento */
.anim .hero-meta, .anim .hero-bento { opacity: 0; transform: translateY(16px); transition: opacity 0.9s 0.35s var(--ease), transform 0.9s 0.35s var(--ease); }
.anim.loaded .hero-meta, .anim.loaded .hero-bento { opacity: 1; transform: none; }
.hero-bento {
  display: grid; gap: 14px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  grid-template-areas:
    "shop  icml  edu   sim sim sim"
    "intro intro intro sim sim sim";
}
.hb-intro { grid-area: intro; display: flex; flex-direction: column; justify-content: flex-end; gap: 24px; padding: 18px 0 4px; }
.hb-shop { grid-area: shop; }
.hb-icml { grid-area: icml; }
.hb-edu { grid-area: edu; }
.hb-sim { grid-area: sim; }
.hb-tile {
  display: flex; flex-direction: column; gap: 6px; min-height: 176px; padding: 16px 16px 18px;
  border-radius: 18px; border: 1px solid var(--line-2); background: var(--surface);
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease);
}
a.hb-tile:hover { transform: translateY(-5px) rotate(-1.2deg); box-shadow: 0 24px 40px -28px rgba(0, 0, 0, 0.5); }
a.hb-icml:hover { transform: translateY(-5px) rotate(1.2deg); }
.hb-shop { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.hb-icml { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.hb-k { font-size: 10.5px; opacity: 0.75; margin-bottom: auto; }
.hb-big { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: clamp(26px, 2.5vw, 38px); letter-spacing: -0.035em; line-height: 0.95; }
.hb-s { font-size: 13px; line-height: 1.35; opacity: 0.8; }
.hero-lede { max-width: 32ch; }

.seg { display: inline-flex; padding: 2px; border: 1px solid var(--line-2); border-radius: 999px; }
.seg-b { white-space: nowrap; font-family: var(--mono); font-size: 10px; letter-spacing: 0.03em; text-transform: uppercase; padding: 4px 10px; border-radius: 999px; color: var(--ink-2); transition: background-color 0.2s, color 0.2s; }
.seg-b.on { background: var(--ink); color: var(--bg); }
.spark-cell svg { width: 100%; height: 26px; margin-top: 2px; overflow: visible; }
.spark-line { fill: none; stroke: var(--accent); stroke-width: 1.8; vector-effect: non-scaling-stroke; stroke-linejoin: round; }
.spark-rr { fill: color-mix(in srgb, var(--miss) 18%, transparent); }

/* nav summary button */
.tldr-open { gap: 6px; }
.tldr-s { display: none; }
.bolt { font-size: 13px; }

/* --------------------------------------------------------------- flagship scrollytelling */
.story { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(32px, 5vw, 80px); margin-top: 32px; }
.story-stage { position: sticky; top: 84px; height: calc(100vh - 110px); max-height: 660px; display: flex; align-items: center; }
.stage-frame {
  position: relative; width: 100%; aspect-ratio: 4 / 3.3; border-radius: 22px; overflow: hidden;
  background: var(--surface); border: 1px solid var(--line-2);
  box-shadow: 0 30px 60px -44px rgba(0, 0, 0, 0.45);
}
.stage-top {
  position: absolute; inset: 0 0 auto 0; z-index: 2; display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; border-bottom: 1px solid var(--line); font-size: 10.5px; color: var(--ink-3); background: var(--surface);
}
.stage-steps { display: flex; gap: 4px; }
.stage-steps i { width: 22px; height: 3px; border-radius: 2px; background: var(--line-2); transition: background-color 0.4s; }
.stage-steps i.on { background: var(--accent); }
.panel {
  position: absolute; inset: 44px 0 0 0; padding: 22px; display: grid; place-items: center;
  opacity: 0; transform: scale(0.96) translateY(12px); pointer-events: none;
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.panel.on { opacity: 1; transform: none; pointer-events: auto; }
.panel > svg { width: 100%; height: 100%; }
.story-steps { padding-bottom: 12vh; }
.step { min-height: 76vh; display: flex; flex-direction: column; justify-content: center; gap: 16px; opacity: 0.25; transition: opacity 0.5s; }
.step.on { opacity: 1; }
.step-n { color: var(--accent); font-size: 11px; }
.step h3 { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: clamp(30px, 3.3vw, 48px); letter-spacing: -0.035em; line-height: 0.98; }
.step p { color: var(--ink-2); font-size: 17px; line-height: 1.65; max-width: 46ch; }
.step p b { color: var(--ink); }
.step .case-link { align-self: flex-start; margin-top: 4px; }

.res { display: grid; grid-template-columns: 170px 1fr; gap: 28px; align-items: center; width: 100%; }
.res-donut { position: relative; }
.res-donut svg { width: 100%; transform: rotate(-90deg); }
.donut-track { fill: none; stroke: var(--line); stroke-width: 12; }
.donut-val { fill: none; stroke: var(--accent); stroke-width: 12; stroke-linecap: round; stroke-dasharray: var(--v) 100; transition: stroke-dasharray 1.3s var(--ease); }
.anim .panel .donut-val { stroke-dasharray: 0 100; }
.anim .panel.on .donut-val { stroke-dasharray: var(--v) 100; }
.res-donut-l { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.res-donut-l b { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 38px; letter-spacing: -0.04em; line-height: 1; }
.res-donut-l span { font-size: 9.5px; color: var(--ink-3); margin-top: 4px; }
.res-stats { display: grid; grid-template-columns: 1fr 1fr; margin-top: 22px; border-top: 1px solid var(--line-2); }
.res-stats div { padding-top: 12px; display: flex; flex-direction: column; gap: 4px; }
.res-stats b { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: 32px; letter-spacing: -0.04em; line-height: 1; }
.res-stats span { font-size: 10px; color: var(--ink-3); }
.panel .bar { transform-origin: left; transition: transform 1.1s var(--ease); }
.anim .panel .bar { transform: scaleX(0); }
.anim .panel.on .bar { transform: none; }
.anim .panel.on .bar-accent { transition-delay: 0.25s; }

.verify { width: 100%; }
.verify-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.verify-head b { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: clamp(30px, 3vw, 42px); letter-spacing: -0.04em; line-height: 1; }
.verify-head span { color: var(--ink-3); font-size: 10.5px; }
.waffle-verify { grid-template-columns: repeat(50, 1fr); gap: 2px; margin-top: 0; }
.waffle-verify i { border-radius: 2px; background: var(--live); opacity: 1 !important; }
.anim .panel .waffle i { transform: scale(0); }
.anim .panel.on .waffle i { transform: none; }
.verify-timeline { display: flex; justify-content: space-between; margin-top: 18px; padding-top: 10px; border-top: 1px solid var(--line-2); font-size: 10px; color: var(--ink-3); text-transform: none; }
.vt-fail { color: var(--miss); }

/* --------------------------------------------------------------- live demos */
.demo { margin-top: 22px; border: 1px solid var(--line-2); border-radius: 16px; background: var(--surface); overflow: hidden; }
.demo-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; padding: 10px 14px; border-bottom: 1px solid var(--line); font-size: 10.5px; color: var(--ink-2); }
.demo-legend { display: flex; align-items: center; gap: 4px; text-transform: none; }
.demo-legend i { display: inline-block; width: 12px; height: 2px; margin-left: 8px; }
.demo-legend .k-meas { width: 6px; height: 6px; border-radius: 50%; }
.demo-legend .k-est { height: 3px; }
.k-truth { background: var(--ink-3); }
.k-meas { background: var(--miss); }
.k-est { background: var(--accent); }
#kalman { width: 100%; height: 150px; }
.demo figcaption { padding: 9px 14px 12px; font-size: 10.5px; line-height: 1.55; color: var(--ink-3); text-transform: none; letter-spacing: 0; border-top: 1px dashed var(--line); }
.demo figcaption b { color: var(--ink); font-weight: 500; }

.collapse-top { display: flex; justify-content: space-between; font-size: 10.5px; color: var(--ink-3); margin-bottom: 4px; }
.collapse-note { border: 1px solid var(--line-2); border-radius: 999px; padding: 1px 7px; }
.collapse input[type="range"] { width: 100%; margin-top: 6px; accent-color: var(--accent); cursor: pointer; }
.collapse-labels { align-items: center; }
#tune-read { color: var(--ink); }

.map-hud { position: absolute; top: 14px; left: 16px; right: 16px; display: flex; justify-content: space-between; align-items: center; gap: 8px; font-size: 10.5px; pointer-events: none; }
#map-status { background: var(--surface); border: 1px solid var(--line); padding: 5px 10px; border-radius: 999px; color: var(--ink); text-transform: none; }
.map-reset { pointer-events: auto; font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; padding: 5px 10px; border-radius: 999px; background: var(--ink); color: var(--bg); }
.m-edge { cursor: pointer; }
.m-edge .m-hit { stroke: transparent; stroke-width: 12; }
.m-edge:hover .m-line { stroke: var(--ink); stroke-width: 2; }
.m-edge.blocked .m-line { stroke: var(--miss); stroke-dasharray: 2 3; }
.m-route { fill: none; stroke: var(--accent); stroke-width: 3.2; stroke-linejoin: round; stroke-linecap: round; pointer-events: none; }

.case-viz-port { aspect-ratio: auto; padding: 18px 20px; }
.case-viz-lob { aspect-ratio: auto; padding: 18px 20px; }
.lob { display: flex; flex-direction: column; gap: 12px; height: 100%; }
.lob-pane { display: flex; flex-direction: column; gap: 10px; flex: 1; }
.lob-pane[hidden] { display: none; }
.ladder { display: grid; gap: 3px; font-family: var(--mono); font-size: 11.5px; }
.lv { display: grid; grid-template-columns: 58px 1fr 40px; align-items: center; gap: 10px; padding: 1px 4px; border-radius: 4px; }
.lv-p { color: var(--ink); font-variant-numeric: tabular-nums; }
.lv.ask .lv-p { color: var(--miss); }
.lv.bid .lv-p { color: var(--live); }
.lv-bar { height: 12px; position: relative; }
.lv-bar i { position: absolute; top: 0; bottom: 0; right: 0; border-radius: 3px 0 0 3px; transition: width 0.2s; }
.lv.ask .lv-bar i { background: color-mix(in srgb, var(--miss) 38%, transparent); }
.lv.bid .lv-bar i { background: color-mix(in srgb, var(--live) 38%, transparent); }
.lv-s { text-align: right; color: var(--ink-2); font-variant-numeric: tabular-nums; }
.lv.hit { animation: lv-hit 0.6s ease-out; }
@keyframes lv-hit { from { background: color-mix(in srgb, var(--accent) 35%, transparent); } }
.lv-spread { text-align: center; font-size: 10px; color: var(--ink-3); padding: 4px 0; border-top: 1px dashed var(--line-2); border-bottom: 1px dashed var(--line-2); margin: 2px 0; text-transform: none; }
#lob-last { font-variant-numeric: tabular-nums; }
#lob-last.buy { color: var(--live); }
#lob-last.sell { color: var(--miss); }
.lob-k { font-size: 10.5px; color: var(--ink-3); text-transform: none; }
.lob-bench { display: grid; gap: 10px; }
.lb-row { display: grid; grid-template-columns: 40px 1fr 70px; align-items: center; gap: 10px; }
.lb-l { font-size: 11px; color: var(--ink-2); }
.lb-v { font-size: 11px; text-align: right; color: var(--ink); text-transform: none; }
.lb-bars { display: grid; gap: 3px; }
.lb-bars i { display: block; height: 10px; width: calc(var(--v) / 340 * 100%); border-radius: 0 3px 3px 0; }
.lb-a { background: var(--accent); }
.lb-b { background: color-mix(in srgb, var(--ink-3) 55%, transparent); }
.lob-table { width: 100%; border-collapse: collapse; font-size: 11px; text-transform: none; margin-top: 4px; }
.lob-table th { text-align: left; font-weight: 400; color: var(--ink-3); padding: 5px 0; border-bottom: 1px solid var(--line-2); }
.lob-table td { padding: 5px 0; border-bottom: 1px solid var(--line); color: var(--ink-2); }
.lob-table b { color: var(--accent); font-weight: 500; }
.port { display: flex; flex-direction: column; gap: 14px; height: 100%; }
.port-head { display: flex; justify-content: space-between; align-items: center; font-size: 10.5px; color: var(--ink-2); }
.port-ctrl { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.port-ctrl label { display: flex; flex-direction: column; gap: 4px; font-size: 10.5px; color: var(--ink-3); }
.port-ctrl label span { display: flex; justify-content: space-between; }
.port-ctrl b { color: var(--ink); font-weight: 500; }
.port-ctrl input { width: 100%; accent-color: var(--accent); cursor: pointer; }
.port-bars { display: grid; gap: 7px; }
.pb-row { display: grid; grid-template-columns: 74px 1fr 64px; align-items: center; gap: 10px; transition: opacity 0.3s; }
.pb-row.zero { opacity: 0.45; }
.pb-name { display: flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: 11px; }
.pb-name i { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; }
.pb-name b { font-weight: 500; color: var(--ink); }
.pb-name small { font-size: 10px; color: var(--ink-3); }
.pb-track { position: relative; height: 14px; border-radius: 0 4px 4px 0; background: var(--line); }
.pb-fill { position: absolute; left: 0; top: 0; bottom: 0; border-radius: 0 4px 4px 0; transition: width 0.5s var(--ease); }
.pb-cap { position: absolute; top: -4px; bottom: -4px; border-left: 1.5px dashed var(--ink); transition: left 0.3s var(--ease); }
.pb-v { font-family: var(--mono); font-size: 11.5px; text-align: right; color: var(--ink); line-height: 1.15; }
.pb-v small { display: block; font-size: 9px; color: var(--accent); text-transform: uppercase; letter-spacing: 0.03em; }
.port-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: auto; padding-top: 12px; border-top: 1px solid var(--line-2); font-size: 10.5px; color: var(--ink-3); }
.port-foot b { color: var(--ink); font-size: 14px; font-weight: 500; margin-left: 4px; }
.port-legend { display: flex; flex-wrap: wrap; gap: 10px; text-transform: none; }
.port-legend span { display: inline-flex; align-items: center; gap: 5px; }
.port-legend i { width: 8px; height: 8px; border-radius: 2px; }

/* --------------------------------------------------------------- 30-second summary */
.tldr { position: fixed; inset: 0; z-index: 155; display: grid; place-items: center; padding: 16px; }
.tldr[hidden] { display: none; }
.tldr-scrim { position: absolute; inset: 0; background: rgba(8, 8, 10, 0.5); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); animation: fade 0.2s; }
.tldr-card {
  position: relative; width: min(680px, 100%); max-height: calc(100vh - 32px); overflow-y: auto;
  padding: clamp(20px, 3vw, 32px); border-radius: 24px; background: var(--surface); color: var(--ink);
  border: 1px solid var(--line-2); box-shadow: 0 50px 100px -30px rgba(0, 0, 0, 0.55);
  animation: card-in 0.45s var(--ease);
}
@keyframes card-in { from { opacity: 0; transform: translateY(24px) rotate(-1.5deg) scale(0.97); } }
.tldr-top { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: var(--accent); }
.tldr-x { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; color: var(--ink-3); padding: 4px 8px; border: 1px solid var(--line-2); border-radius: 999px; }
.tldr-x:hover { color: var(--ink); border-color: var(--ink); }
.tldr-id { margin: 18px 0 16px; }
.tldr-id h2 { font-family: var(--display); font-weight: 800; font-stretch: 85%; font-size: clamp(30px, 4vw, 44px); letter-spacing: -0.035em; line-height: 0.95; }
.tldr-id p { margin-top: 8px; color: var(--ink-2); }
.tldr-facts { border-top: 1px solid var(--ink); }
.tldr-facts div { display: grid; grid-template-columns: 90px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.tldr-facts dt { font-size: 10.5px; color: var(--ink-3); }
.tldr-facts dd { font-size: 15px; }
.tldr-list { display: grid; gap: 8px; margin: 18px 0; }
.tldr-list li { position: relative; padding-left: 18px; font-size: 14.5px; line-height: 1.5; color: var(--ink-2); }
.tldr-list li::before { content: ""; position: absolute; left: 0; top: 0.6em; width: 8px; height: 8px; border-radius: 2px; background: var(--accent); }
.tldr-list b { color: var(--ink); }
.tldr-stack { font-size: 14px; color: var(--ink-2); padding: 12px 14px; border-radius: 12px; background: var(--bg-2); }
.tldr-stack .mono { display: block; font-size: 10px; color: var(--ink-3); margin-bottom: 3px; }
.tldr-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.tldr-actions .btn { height: 40px; padding: 0 16px; }

@media (max-width: 1080px) {
  .hero-bento {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-areas: "shop icml edu" "intro intro intro" "sim sim sim";
  }
}
@media (max-width: 900px) {
  .story { grid-template-columns: 1fr; gap: 0; }
  .story-stage { top: 64px; height: auto; max-height: none; z-index: 5; background: var(--bg); padding: 8px 0 12px; }
  .stage-frame { aspect-ratio: auto; height: min(46vh, 380px); }
  .panel { padding: 14px; }
  .step { min-height: 64vh; justify-content: flex-start; padding-top: 12px; }
  .res { grid-template-columns: 120px 1fr; gap: 16px; }
  .res-donut-l b { font-size: 26px; }
  .res-stats b { font-size: 24px; }
}
@media (max-width: 760px) {
  .hero-bento { grid-template-columns: 1fr 1fr; grid-template-areas: "shop shop" "icml edu" "intro intro" "sim sim"; }
  .hb-tile { min-height: 132px; }
  .tldr-l { display: none; }
  .tldr-s { display: inline; }
  .tldr-open { padding: 0 12px; }
  .seg-b { padding: 4px 7px; font-size: 9.5px; }
  .tldr-facts div { grid-template-columns: 70px 1fr; }
  .verify-timeline { font-size: 9px; }
  .waffle-verify { grid-template-columns: repeat(25, 1fr); }
}

/* --------------------------------------------------------------- responsive */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .hero-lede { max-width: 36ch; }
  .xp-row { grid-template-columns: 1fr 1.4fr; }
  .xp-when { grid-column: 1 / -1; flex-direction: row; gap: 16px; padding-top: 0; }
  .paper { grid-template-columns: 1fr; }
  .paper-side { border-left: 0; border-top: 1px solid var(--line); }
  .kit { grid-template-columns: repeat(2, 1fr); row-gap: 40px; }
  .kit-col:nth-child(3) { padding-left: 0; border-left: 0; }
  .archive-list a { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr) 24px; }
  .a-stack { display: none; }
  .contact-links { grid-auto-flow: row; grid-template-columns: repeat(2, 1fr); }
  .contact-links li:nth-child(3) { border-left: 0; }
  .contact-links li:nth-child(3) a { padding-left: 0; }
}

@media (max-width: 760px) {
  .mark-name { display: none; }
  .kbd-k { display: none; }
  .kbd-btn { padding: 0 14px; }
  .hide-sm { display: none; }
  .hero { padding-top: 88px; }
  .sec-head { grid-template-columns: 1fr; gap: 10px; }
  .sec-idx { font-size: 10.5px; padding: 4px 7px; }
  .sec-note { text-align: left; }
  .xp-row { grid-template-columns: 1fr; gap: 14px; padding: 30px 0; }
  .xp-when { justify-content: space-between; }
  .xp-org .badge { top: -3px; }
  .findings > div { grid-template-columns: 1fr; }
  .findings p { grid-column: 1; grid-row: auto; text-align: left; max-width: none; margin-top: 6px; }
  .case { grid-template-columns: 1fr; }
  .case-flip .case-viz { order: 0; }
  .archive-list a { grid-template-columns: 1fr 24px; gap: 6px 16px; }
  .a-name { grid-column: 1; }
  .archive-list .arrow { grid-column: 2; grid-row: 1; }
  .a-desc { grid-column: 1 / -1; }
  .kit { grid-template-columns: 1fr; }
  .kit-col, .kit-col + .kit-col { padding: 0 0 24px; border-left: 0; border-bottom: 1px solid var(--line); }
  .edu { grid-template-columns: 1fr; }
  .honors li { grid-template-columns: 110px 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .piano-keys { height: 160px; }
  .contact-links { grid-template-columns: 1fr; }
  .contact-links li + li { border-left: 0; }
  .contact-links li + li a { padding-left: 0; }
  .footer { flex-direction: column; gap: 6px; }
  .palette { padding-top: 10vh; }
}

@media (max-width: 420px) {
  .sim-stats .v { font-size: 15px; }
}