@font-face {
  font-family: "Caslon Display";
  src: url("/assets/fonts/LibreCaslonDisplay-Regular.ttf") format("truetype");
  font-display: swap;
}
@font-face {
  font-family: "Space Grotesk";
  src: url("/assets/fonts/SpaceGrotesk-VF.ttf") format("truetype");
  font-weight: 300 700;
  font-display: swap;
}
@font-face {
  font-family: "Space Mono";
  src: url("/assets/fonts/SpaceMono-Regular.ttf") format("truetype");
  font-display: swap;
}

:root {
  --ink: #080807;
  --paper: #f6f2ed;
  --muted: #a39d93;
  --faint: #6a655d;
  --line: #24231f;
  --card: #0e0d0b;
  --blush: #f0c3ae;
  --teal: #79c2bf;
  --teal-deep: #206e76;
  --serif: "Caslon Display", Georgia, serif;
  --sans: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: "Space Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  z-index: 10;
}

a { color: var(--paper); text-decoration-color: var(--faint); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--teal); }
.mono { font-family: var(--mono); }
.muted { color: var(--faint); }

.strip {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 8px 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 10px var(--teal); }

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 16px;
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--serif); font-size: 22px; }
.top nav { display: flex; gap: 22px; font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a:hover { color: var(--paper); }

main { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 48px;
  align-items: center;
  padding: 64px 0 72px;
}
.eyebrow { font-size: 12px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--teal); margin: 0 0 18px; }
h1, h2, h3, h4 { margin: 0; font-weight: 400; }
h1 { font-family: var(--serif); font-size: clamp(52px, 7.5vw, 96px); line-height: 1; letter-spacing: -0.01em; }
.lede { font-size: clamp(17px, 1.8vw, 20px); color: var(--muted); max-width: 42ch; margin: 22px 0 0; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid var(--line);
}
.button.primary { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.button.primary:hover { background: #fff; }
.button.ghost { color: var(--muted); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; }

/* matrix multiplication figure */
.matmul {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 6px;
  padding: 18px;
  min-width: 0;
}
.mm-head { display: flex; justify-content: space-between; font-size: 12px; color: var(--paper); margin-bottom: 14px; }
.mm-grid {
  --cell: clamp(14px, 2.2vw, 26px);
  display: grid;
  gap: 3px;
  justify-content: center;
  font-family: var(--mono);
  font-size: calc(var(--cell) * 0.42);
}
.mm-grid .c {
  width: var(--cell);
  height: var(--cell);
  display: grid;
  place-items: center;
  border-radius: 3px;
  color: var(--faint);
  background: #151411;
  transition: background 0.25s, color 0.25s;
  position: relative;
}
.mm-grid .c.gap { background: transparent; }
.mm-grid .c.a { background: #121a19; color: #5d7f7c; }
.mm-grid .c.b { background: #1c1512; color: #8a6f62; }
.mm-grid .c.a.on { background: var(--teal-deep); color: var(--paper); }
.mm-grid .c.b.on { background: #9a6a57; color: var(--paper); }
.mm-grid .c.res { background: #12110f; }
.mm-grid .c.res.target { outline: 1px solid var(--paper); color: var(--paper); }
.mm-grid .c.res.done { color: transparent; }
.mm-grid .c.res.done::after {
  content: "";
  position: absolute;
  inset: 22%;
  border-radius: 50%;
  background: radial-gradient(circle at 36% 32%, #fff 0, #f4eee7 38%, #efd6ca 68%, #b9dcd7 88%, var(--teal) 100%);
  opacity: var(--glow, 0.55);
  animation: pop 0.5s ease-out;
}
@keyframes pop { from { transform: scale(0.2); opacity: 0; } to { transform: scale(1); } }
.matmul figcaption { margin-top: 14px; font-size: 12px; }
.mm-eq { color: var(--paper); min-height: 2.8em; overflow-wrap: anywhere; }
.mm-eq b { color: var(--blush); font-weight: 400; }

/* sections */
.block { padding: 64px 0; border-top: 1px solid var(--line); }
.block-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; margin-bottom: 28px; }
.block-head p { margin: 0; font-size: 12px; }
h2 { font-family: var(--sans); font-size: clamp(30px, 4.4vw, 46px); font-weight: 500; letter-spacing: -0.02em; line-height: 1.1; }
.num { font-size: 13px; color: var(--teal); vertical-align: top; margin-right: 14px; letter-spacing: 0.05em; }
h3 { font-family: var(--sans); font-size: 22px; font-weight: 500; letter-spacing: -0.01em; margin: 6px 0 8px; }
h4 { font-family: var(--sans); font-size: 18px; font-weight: 500; }
.label { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin: 0; }
.tag { border: 1px solid var(--line); padding: 2px 8px; border-radius: 3px; color: var(--muted); }
.tag.live { border-color: var(--teal-deep); color: var(--teal); }

.grid { display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.two { grid-template-columns: repeat(2, 1fr); }
article { background: var(--card); padding: 26px; }
article p { margin: 0; color: var(--muted); }

/* live stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.stat { background: var(--card); padding: 22px; }
.stat .value { font-size: clamp(24px, 3vw, 34px); margin: 10px 0 4px; color: var(--paper); letter-spacing: -0.02em; }
.stat .note { margin: 0; font-size: 13px; color: var(--faint); }
.up { color: var(--teal); }
.down { color: var(--blush); }
.source { font-size: 11px; margin: 14px 0 0; }
.source a { color: var(--muted); }

/* research list */
.papers { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.papers li { margin: 0; border-top: 1px solid var(--line); }
.papers li:first-child { border-top: 0; }
.papers a { display: grid; grid-template-columns: 150px 1fr 24px; gap: 20px; align-items: baseline; padding: 18px 22px; background: var(--card); text-decoration: none; transition: background 0.2s; }
.papers a:hover { background: #15140f; }
.papers .kind { font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--teal); }
.papers .what b { display: block; font-weight: 500; color: var(--paper); }
.papers .what span { color: var(--muted); font-size: 15px; }
.papers .go { color: var(--faint); text-align: right; }
h3.sub { font-size: 13px; font-family: var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--faint); margin: 32px 0 12px; font-weight: 400; }
.papers a:hover .go { color: var(--blush); }

/* timeline */
.timeline { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--line); margin-left: 8px; }
.timeline li { display: grid; grid-template-columns: 150px 1fr; gap: 20px; padding: 0 0 26px 26px; position: relative; }
.timeline li::before { content: ""; position: absolute; left: -5px; top: 7px; width: 9px; height: 9px; background: var(--ink); border: 1px solid var(--muted); border-radius: 2px; }
.timeline li.ours::before { background: var(--teal); border-color: var(--teal); box-shadow: 0 0 10px var(--teal); }
.timeline li.next::before { background: var(--ink); border-style: dashed; }
.when { font-size: 12px; color: var(--faint); padding-top: 3px; }
.timeline p { margin: 2px 0 0; color: var(--muted); font-size: 15px; }

ul { margin: 12px 0 0; padding-left: 20px; color: var(--muted); }
li { margin: 6px 0; }
ul.links { list-style: none; padding: 0; font-size: 14px; }
ul.links li::before { content: "¶ "; color: var(--teal); }
ul.warn li::marker { color: var(--blush); }

footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 16px 64px;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--faint);
  font-size: 14px;
}
footer p { max-width: 60ch; margin: 12px auto 0; }
footer .small { font-size: 12px; }
footer .small a { color: var(--muted); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 36px; padding: 40px 0 56px; }
  .mm-grid { --cell: clamp(14px, 5.2vw, 24px); }
  .strip { flex-wrap: nowrap; gap: 8px; font-size: 10px; }
  .strip .muted { display: none; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid.three, .grid.two { grid-template-columns: 1fr; }
  .top nav { display: none; }
  .block { padding: 48px 0; }
  .timeline li { grid-template-columns: 1fr; gap: 2px; }
  .papers a { grid-template-columns: 1fr 20px; gap: 4px 12px; padding: 16px; }
  .papers .kind { grid-column: 1 / -1; }
}
@media (prefers-reduced-motion: reduce) {
  .mm-grid .c.res.done::after { animation: none; }
}