:root {
  color-scheme: dark;
  --bg: #10100f;
  --panel: #171716;
  --fg: #f0eee7;
  --muted: #918f88;
  --faint: #6b6962;
  --line: rgba(240, 238, 231, 0.16);
  --line-strong: rgba(240, 238, 231, 0.28);
  --signal: #5c7cff;
  --signal-text: #9bb0ff;
  --ember: #f09462;
  --chip: #1d1d1b;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
  --sans: "Avenir Next", "Segoe UI", system-ui, -apple-system, sans-serif;
  --serif: "Iowan Old Style", Palatino, "Times New Roman", serif;
  --mono: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --max: 68rem;
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --header-h: 4.5rem;
}

@media (prefers-color-scheme: light) {
  :root {
    color-scheme: light;
    --bg: #f4f1ea;
    --panel: #ebe6dc;
    --fg: #161614;
    --muted: #6f6c64;
    --faint: #8a877e;
    --line: rgba(22, 22, 20, 0.12);
    --line-strong: rgba(22, 22, 20, 0.22);
    --signal: #3d5fe0;
    --signal-text: #2f4cc0;
    --ember: #c05d2e;
    --chip: #e3ddd2;
    --shadow: 0 24px 80px rgba(40, 32, 20, 0.08);
  }
}

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

html {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.016) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.016) 1px, transparent 1px),
    var(--bg);
  background-size: 4rem 4rem;
}

@media (prefers-color-scheme: light) {
  body {
    background-image:
      linear-gradient(rgba(22, 22, 20, 0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(22, 22, 20, 0.03) 1px, transparent 1px);
  }
}

::selection {
  background: var(--signal);
  color: #fff;
}

a {
  color: inherit;
}

a[target="_blank"] {
  cursor: alias;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.skip {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  z-index: 60;
  padding: 0.6rem 0.8rem;
  border-radius: 0.4rem;
  background: var(--panel);
  color: var(--fg);
  text-decoration: none;
}

.skip:focus {
  top: 0.75rem;
}

.wrap {
  width: min(var(--max), calc(100% - 2 * var(--gutter)));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  min-height: var(--header-h);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(1.2) blur(16px);
  -webkit-backdrop-filter: saturate(1.2) blur(16px);
}

@supports not (backdrop-filter: blur(16px)) {
  .site-header {
    background: var(--bg);
  }
}

.site-footer {
  border-top: 1px solid var(--line);
}

.site-header .wrap,
.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand svg {
  width: 1.85rem;
  height: 1.85rem;
  display: block;
}

.brand-name {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.15s ease;
}

nav a:hover,
.brand:hover .brand-name {
  color: var(--fg);
}

.hero {
  padding: clamp(3.5rem, 10vw, 7.5rem) 0 3.5rem;
}

.kicker {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0 0 1.25rem;
  color: var(--signal-text);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.kicker-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--signal);
}

h1 {
  margin: 0 0 1rem;
  font-family: var(--serif);
  font-size: clamp(2.6rem, 8vw, 5.4rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 0.95;
}

.lede {
  max-width: 38rem;
  margin: 0 0 1.25rem;
  font-size: clamp(1.12rem, 2.2vw, 1.35rem);
  line-height: 1.5;
  color: var(--muted);
}

.thesis {
  max-width: 40rem;
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.65;
}

.thesis + .thesis {
  margin-top: 0.85rem;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.75rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--chip);
  color: var(--muted);
  font-size: 0.82rem;
}

.section {
  padding: 0 0 clamp(3.5rem, 8vw, 6rem);
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 1.1rem;
}

.section-head h2,
.work h2,
.approach h2,
.glossary h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 500;
}

.meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--faint);
  letter-spacing: 0.04em;
}

.catalog-board {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.catalog-board table {
  width: 100%;
  border-collapse: collapse;
}

.catalog-board caption {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.catalog-board th,
.catalog-board td {
  padding: 1rem 1.1rem;
  text-align: left;
  vertical-align: top;
  border-top: 1px solid var(--line);
}

.catalog-board thead th {
  border-top: 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.catalog-board tbody tr:nth-child(odd) {
  background: color-mix(in srgb, var(--fg) 3%, transparent);
}

.catalog-board tbody tr:hover {
  background: color-mix(in srgb, var(--signal) 8%, transparent);
}

.catalog-board a {
  text-decoration: none;
}

.catalog-board a:hover {
  color: var(--signal-text);
}

.product-name {
  display: block;
  font-size: 1.02rem;
}

.product-id {
  display: block;
  margin-top: 0.2rem;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.lane,
.stack {
  color: var(--muted);
}

.license {
  display: inline-flex;
  align-items: center;
  min-height: 1.6rem;
  padding: 0 0.65rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--chip);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.proof {
  color: var(--signal-text);
  font-family: var(--mono);
  font-size: 0.9rem;
}

.catalog-note {
  margin: 0;
  padding: 0.85rem 1.1rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.work-list {
  display: grid;
  gap: 1rem;
}

.work-card {
  display: grid;
  gap: 0.85rem;
  padding: 1.35rem 1.4rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 1.15rem;
  background: var(--panel);
}

.work-card-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem 1rem;
  align-items: baseline;
}

.work-card h3 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 550;
}

.work-card h3 a {
  text-decoration: none;
}

.work-card h3 a:hover {
  color: var(--signal-text);
}

.work-card p {
  margin: 0;
  max-width: 48rem;
  line-height: 1.65;
  color: var(--muted);
}

.work-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 0.9rem;
  align-items: center;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.work-meta a {
  color: var(--signal-text);
  text-decoration: none;
}

.metric {
  color: var(--ember);
}

.approach-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 800px) {
  .approach-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.principle {
  padding: 1.25rem 1.2rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: 1.1rem;
  background: var(--panel);
}

.principle h3 {
  margin: 0 0 0.55rem;
  font-size: 1.1rem;
}

.principle p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.toolbox {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.lede-note {
  margin: 0 0 1rem;
  max-width: 40rem;
  color: var(--muted);
  line-height: 1.55;
}

.glossary dl {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

.glossary .term {
  display: grid;
  gap: 0.25rem 1.25rem;
  padding: 0.95rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--panel);
}

@media (min-width: 800px) {
  .glossary dl {
    grid-template-columns: 1fr 1fr;
  }
}

.glossary dt {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.glossary dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.site-footer .wrap {
  align-items: flex-start;
  padding: 1.4rem 0 2rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links a {
  color: var(--signal-text);
  text-decoration: none;
}

.boundary {
  margin: 0.35rem 0 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 0.75rem;
}

.missing {
  padding: clamp(5rem, 16vw, 9rem) 0;
}

.missing p {
  max-width: 32rem;
  color: var(--muted);
  line-height: 1.6;
}

@media (max-width: 800px) {
  .catalog-board thead {
    display: none;
  }

  .catalog-board tr {
    display: block;
    padding: 0.85rem 0.2rem;
  }

  .catalog-board td {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.28rem 1rem;
    border: 0;
  }

  .catalog-board td::before {
    content: attr(data-label);
    color: var(--faint);
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .catalog-board td:first-child {
    display: block;
  }

  .catalog-board td:first-child::before {
    content: none;
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 3.85rem;
  }

  .site-header .wrap {
    min-height: var(--header-h);
    gap: 0.75rem;
    flex-wrap: nowrap;
  }

  nav a {
    font-size: 0.82rem;
  }

  .site-footer .wrap {
    flex-direction: column;
    align-items: flex-start;
    padding-top: 1rem;
    padding-bottom: 1.4rem;
  }

  nav {
    gap: 0.75rem;
  }

  .brand-name {
    font-size: 0.68rem;
  }
}

@media (max-width: 520px) {
  .brand-name {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  nav a,
  .catalog-board a,
  .work-card h3 a {
    transition: none;
  }
}