:root {
  --paper: #ffffff;
  --paper-alt: #f4f4f6;
  --line: #e6e6eb;
  --ink: #000000;
  --ink-soft: #55555e;
  --muted: #63636d;
  --faint: #8a8a93;
  --sans: "Geist", "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, "SFMono-Regular", monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --gut: clamp(1rem, 3vw, 2rem);
  color-scheme: light;
}

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

html {
  scroll-padding-top: 5rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
}

body {
  background: var(--paper);
  color: var(--ink);
  font: 400 1rem/1.55 var(--sans);
  letter-spacing: -0.011em;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; height: auto; }
button { font: inherit; color: inherit; }
::selection { background: var(--ink); color: #fff; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 4px; }

.mono {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

/* header */
.top {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem var(--gut);
  background: rgb(255 255 255 / 86%);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
}
.top-logo { color: var(--ink); }
.top-logo .logo { height: 1.05rem; width: auto; }
.top-nav { display: flex; gap: clamp(1rem, 2.5vw, 1.75rem); font-size: 0.875rem; color: var(--ink-soft); }
.top-nav a { transition: color 0.3s; }
.top-nav a:hover { color: var(--ink); }
.top-demo { color: var(--ink); font-weight: 500; }
@media (max-width: 520px) { .top-nav a:not(.top-demo) { display: none; } }

main { padding: 0 var(--gut); }

/* hero */
.hero { padding: clamp(3.5rem, 11vh, 7rem) 0 clamp(2.5rem, 6vh, 4rem); }
.meta span { color: var(--faint); }
.name {
  font-weight: 500;
  font-size: clamp(2.5rem, 5.2vw, 4.25rem);
  letter-spacing: -0.045em;
  line-height: 1;
  margin: 0.9rem 0 1rem -0.03em;
}
.lead {
  max-width: 30ch;
  font-size: clamp(1.0625rem, 1.5vw, 1.3125rem);
  font-weight: 400;
  line-height: 1.4;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
.soft { color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.75rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 44px;
  padding: 0 1.25rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: border-color 0.3s, opacity 0.3s, transform 0.3s var(--ease);
}
.btn:hover { border-color: rgb(0 0 0 / 40%); }
.btn:active { transform: scale(0.97); }
.btn-ink { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn-ink:hover { border-color: var(--ink); opacity: 0.86; }
.note { margin-top: 0.9rem; font-family: var(--mono); font-size: 0.75rem; color: var(--faint); letter-spacing: 0; }

/* work */
.cards {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gut);
}
@media (max-width: 1100px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px) { .cards { grid-template-columns: 1fr; } }
.card-link {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: var(--paper);
  transition: border-color 0.3s, transform 0.5s var(--ease);
}
.card-link:hover { border-color: rgb(0 0 0 / 28%); }
.card-link:active { transform: scale(0.99); }
.card-img { position: relative; display: block; aspect-ratio: 16 / 10; overflow: hidden; background: var(--paper-alt); }
.card-img::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 28%;
  background: linear-gradient(to top, rgb(255 255 255 / 92%), rgb(255 255 255 / 0%));
  pointer-events: none;
}
.card-img img { width: 100%; height: 100%; object-fit: cover; object-position: top center; transition: transform 0.9s var(--ease); }
.card-link:hover .card-img img { transform: scale(1.03); }
.card-cap { display: flex; align-items: baseline; gap: 0.65rem; padding: 0.85rem 1rem; border-top: 1px solid var(--line); }
.card-title { flex: 1; font-size: 0.9375rem; letter-spacing: -0.012em; }
.card-plus { color: var(--muted); transition: color 0.3s, transform 0.5s var(--ease); }
.card-link:hover .card-plus { color: var(--ink); transform: rotate(90deg); }

/* facts */
.facts { padding: clamp(4.5rem, 12vh, 8rem) 0 0; }
.facts dl { border-top: 1px solid var(--ink); }
.fact {
  display: grid;
  grid-template-columns: minmax(8rem, 1fr) 3fr;
  gap: 1rem;
  align-items: baseline;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}
.fact dd { font-size: 1rem; letter-spacing: -0.012em; }
.fact a { border-bottom: 1px solid var(--line); transition: border-color 0.3s; }
.fact a:hover { border-color: var(--ink); }
@media (max-width: 600px) { .fact { grid-template-columns: 1fr; gap: 0.3rem; } }

/* section heads */
.index, .docs { padding: clamp(4.5rem, 12vh, 8rem) 0 0; }
.sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--ink);
}
.sec-title { font-weight: 500; font-size: clamp(1.375rem, 2.2vw, 1.875rem); letter-spacing: -0.035em; line-height: 1.1; }
.count { display: inline-block; vertical-align: top; margin-left: 0.2em; font-size: 0.7rem; letter-spacing: 0.04em; }

/* diagram index */
.tabs { display: flex; flex-wrap: wrap; gap: 0.15rem 1.1rem; }
.tab {
  padding: 0.5rem 0;
  border: 0;
  border-bottom: 1px solid transparent;
  background: none;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
  cursor: pointer;
  transition: color 0.3s, border-color 0.3s;
}
.tab span { margin-left: 0.25rem; }
.tab:hover { color: var(--ink); }
.tab[aria-pressed="true"] { color: var(--ink); border-color: var(--ink); }

.grid {
  list-style: none;
  padding: 1.75rem 0 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 2.25rem var(--gut);
}
@media (max-width: 1100px) { .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 760px) { .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.75rem 1rem; } }
.cell[hidden] { display: none; }
.cell-link { display: block; }
.cell-img { position: relative; display: block; aspect-ratio: 4 / 3; overflow: hidden; border-radius: 0.85rem; background: var(--paper-alt); }
.cell-img::before, .cell-img::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  z-index: 1;
  height: 22%;
  pointer-events: none;
}
.cell-img::before { top: 0; background: linear-gradient(to bottom, var(--paper-alt) 8%, rgb(244 244 246 / 0%)); }
.cell-img::after { bottom: 0; background: linear-gradient(to top, var(--paper-alt) 8%, rgb(244 244 246 / 0%)); }
.cell-img img {
  width: 100%;
  height: 100%;
  padding: 9%;
  object-fit: contain;
  mix-blend-mode: multiply;
  transition: transform 0.9s var(--ease);
}
.cell-link:hover .cell-img img { transform: scale(1.045); }
.cell-cap { display: flex; align-items: baseline; gap: 0.6rem; padding-top: 0.65rem; }
.cell-title { font-size: 0.875rem; line-height: 1.3; letter-spacing: -0.01em; }

/* documents */
.rows { list-style: none; padding: 0; }
.row {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) auto 1.5rem;
  gap: 1rem;
  align-items: baseline;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
  transition: padding 0.5s var(--ease), border-color 0.3s;
}
.row-t { font-size: 1rem; letter-spacing: -0.012em; }
.row-a { text-align: right; color: var(--muted); transition: color 0.3s; }
.row:hover { padding-left: 0.6rem; border-color: var(--ink); }
.row:hover .row-a { color: var(--ink); }
@media (max-width: 640px) {
  .row { grid-template-columns: 2.25rem minmax(0, 1fr) 1.25rem; }
  .row-m { display: none; }
}

/* footer */
.foot { display: flex; justify-content: center; padding: clamp(6rem, 16vh, 10rem) var(--gut) clamp(2rem, 5vh, 3rem); }
.foot-mark { display: block; color: var(--ink); transition: opacity 0.3s; }
.foot-mark:hover { opacity: 0.85; }
.foot-mark .logo { width: 8.5rem; height: auto; }

/* lightbox */
.lb { position: fixed; inset: 0; z-index: 50; display: grid; grid-template-rows: auto minmax(0, 1fr); background: var(--paper); }
.lb[hidden] { display: none; }
.lb-bar { display: flex; align-items: center; gap: 1rem; padding: 0.75rem var(--gut); border-bottom: 1px solid var(--line); }
.lb-n { flex: none; }
.lb-t { flex: 1; min-width: 0; overflow: hidden; font-weight: 500; white-space: nowrap; text-overflow: ellipsis; }
.lb-tools { display: flex; align-items: center; gap: 1.1rem; }
.lb[data-set="shot"] .lb-tools a { display: none; }
.lb-tools a { transition: color 0.3s; }
.lb-tools a:hover { color: var(--ink); }
.lb-x, .lb-nav {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
  cursor: pointer;
  transition: border-color 0.3s;
}
.lb-x:hover, .lb-nav:hover { border-color: rgb(0 0 0 / 40%); }
.lb-stage { overflow: auto; display: grid; place-items: center; padding: var(--gut) var(--gut) 5.5rem; background: var(--paper-alt); }
.lb-stage img { max-width: 100%; max-height: calc(100dvh - 10rem); width: auto; background: #fff; cursor: zoom-in; }
.lb-stage.zoom { place-items: start center; }
.lb-stage.zoom img { max-width: none; max-height: none; cursor: zoom-out; }
.lb-nav { position: fixed; bottom: var(--gut); z-index: 51; }
.lb-prev { left: calc(50% - 52px); }
.lb-next { left: calc(50% + 8px); }
@media (max-width: 640px) {
  .lb-bar { flex-wrap: wrap; }
  .lb-t { order: 3; flex-basis: 100%; }
  .lb-tools { margin-left: auto; gap: 0.8rem; }
}

/* document pages */
.doc-head { padding: clamp(3rem, 9vh, 6rem) 0 1.5rem; border-bottom: 1px solid var(--ink); }
.back { display: inline-block; margin-bottom: 2rem; transition: color 0.3s; }
.back:hover { color: var(--ink); }
.doc-title { font-weight: 500; font-size: clamp(1.75rem, 3.6vw, 2.75rem); letter-spacing: -0.04em; line-height: 1.05; }
.md { max-width: 62rem; padding-top: 2rem; color: var(--ink-soft); line-height: 1.65; }
.md > :first-child { margin-top: 0; }
.md h1, .md h2, .md h3, .md h4 { color: var(--ink); font-weight: 500; }
.md h1 { font-size: 1.5rem; letter-spacing: -0.03em; margin: 2.75rem 0 1rem; }
.md h2 { font-size: 1.3rem; letter-spacing: -0.025em; margin: 2.75rem 0 0.9rem; }
.md h3 { font-size: 1.075rem; letter-spacing: -0.015em; margin: 2rem 0 0.7rem; }
.md h4 { font-size: 1rem; margin: 1.75rem 0 0.5rem; }
.md p, .md ul, .md ol, .md dl { margin: 0 0 1rem; max-width: 72ch; }
.md ul, .md ol { padding-left: 1.2rem; }
.md li { margin-bottom: 0.3rem; }
.md strong { color: var(--ink); font-weight: 500; }
.md a { color: var(--ink); border-bottom: 1px solid var(--line); }
.md a:hover { border-color: var(--ink); }
.md code { padding: 0.1em 0.35em; border-radius: 0.3em; background: var(--paper-alt); font-family: var(--mono); font-size: 0.85em; }
.md pre { overflow: auto; margin: 0 0 1.25rem; padding: 1rem 1.1rem; border-radius: 0.85rem; background: var(--paper-alt); color: var(--ink); font-family: var(--mono); font-size: 0.8rem; line-height: 1.5; }
.md pre code { padding: 0; background: none; font-size: inherit; }
.md table { display: block; width: 100%; overflow-x: auto; margin: 0 0 1.75rem; border-collapse: collapse; font-size: 0.85rem; }
.md th, .md td { padding: 0.6rem 1rem 0.6rem 0; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.md th { border-bottom-color: var(--ink); font-family: var(--mono); font-size: 0.7rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); white-space: nowrap; }
.md blockquote { margin: 0 0 1rem; padding-left: 1rem; border-left: 2px solid var(--ink); color: var(--ink); }
.md hr { margin: 2.5rem 0; border: 0; border-top: 1px solid var(--line); }
.md img { border-radius: 0.85rem; background: var(--paper-alt); }
.md figure { margin: 0 0 1.5rem; }
.md figcaption { padding-top: 0.5rem; font-family: var(--mono); font-size: 0.75rem; color: var(--muted); }

/* motion */
.js .reveal { opacity: 0; transform: translateY(14px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
  .js .reveal { opacity: 1; transform: none; }
}

/* status pages */
.status-page { min-height: 100dvh; display: grid; place-items: center; }
.status { display: flex; flex-direction: column; align-items: center; max-width: 34rem; padding: 3rem var(--gut); text-align: center; }
.status-art { width: auto; max-width: min(100%, 24rem); max-height: 15rem; height: auto; margin-bottom: 1.5rem; }
.status-title { margin-top: 0.75rem; font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 500; letter-spacing: -0.035em; line-height: 1.1; }
.status-text { margin-top: 0.6rem; max-width: 30ch; color: var(--muted); text-wrap: balance; }
.status .actions { justify-content: center; margin-top: 1.75rem; }