:root {
  color-scheme: dark;
  --ink: #f8fafc;
  --muted: #a8b3c5;
  --canvas: #0b1120;
  --panel: #111a2d;
  --panel-raised: #18233a;
  --line: #334155;
  --accent: #4ade80;
  --accent-strong: #22c55e;
  --danger: #fb7185;
  --warning: #fbbf24;
  --radius: 0.75rem;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 20rem;
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(74, 222, 128, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74, 222, 128, 0.035) 1px, transparent 1px),
    var(--canvas);
  background-size: 32px 32px;
  font-family: var(--sans);
  line-height: 1.6;
}

a {
  color: inherit;
  text-underline-offset: 0.2em;
}

a:focus-visible,
button:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.site-header,
main,
footer {
  width: min(76rem, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  display: flex;
  min-height: 5rem;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-decoration: none;
}

.brand span,
.hero h1 span,
.feature-number {
  color: var(--accent);
}

nav {
  display: flex;
  gap: 0.25rem;
}

nav a {
  min-height: 2.75rem;
  padding: 0.55rem 0.8rem;
  display: inline-flex;
  align-items: center;
  color: var(--muted);
  font-weight: 650;
  text-decoration: none;
}

nav a:hover {
  color: var(--ink);
}

.hero {
  min-height: 40rem;
  padding: clamp(5rem, 13vw, 10rem) 0 5rem;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.feature-number,
.field-label,
.status {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow {
  color: var(--accent);
}

h1,
h2,
p {
  margin-top: 0;
}

.hero h1 {
  max-width: 12ch;
  margin-bottom: 1.75rem;
  font-size: clamp(3.25rem, 9vw, 7.5rem);
  line-height: 0.9;
  letter-spacing: -0.065em;
}

.lede {
  max-width: 46rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
}

.actions,
.toolbar,
.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.actions {
  margin-top: 2rem;
}

.button,
button {
  min-height: 2.75rem;
  border: 1px solid transparent;
  border-radius: 0.35rem;
  padding: 0.65rem 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: 700 0.95rem/1 var(--sans);
  text-decoration: none;
  cursor: pointer;
}

.button-primary,
button[type="submit"] {
  color: #052e16;
  background: var(--accent);
}

.button-primary:hover,
button[type="submit"]:hover {
  background: #86efac;
}

.button-secondary,
button[type="button"] {
  border-color: var(--line);
  color: var(--ink);
  background: var(--panel);
}

.button-secondary:hover,
button[type="button"]:hover {
  border-color: var(--muted);
  background: var(--panel-raised);
}

button:disabled {
  opacity: 0.55;
  cursor: wait;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}

.feature-grid article {
  min-height: 17rem;
  padding: 2.5rem 2rem 3rem 0;
}

.feature-grid article + article {
  border-left: 1px solid var(--line);
  padding-left: 2rem;
}

.feature-grid h2 {
  font-size: 1.4rem;
}

.feature-grid article > p:last-child,
.manifesto > p,
footer {
  color: var(--muted);
}

.manifesto {
  padding: 5rem 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.8fr);
  gap: 4rem;
  align-items: end;
}

.volume-section,
.docs-main {
  padding: 5rem 0;
}

.section-heading,
.docs-heading {
  max-width: 48rem;
  margin-bottom: 2.5rem;
}

.section-heading h2,
.docs-heading h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.4rem, 6vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.section-heading > p:last-child,
.docs-heading > p:last-child,
.volume-card p,
.doc-card p,
.callout p {
  color: var(--muted);
}

.volume-grid,
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.volume-card,
.doc-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: rgba(17, 26, 45, 0.96);
}

.volume-card {
  min-height: 20rem;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.volume-card:hover {
  border-color: var(--accent);
  background: var(--panel-raised);
}

.volume-card h3,
.doc-card h2 {
  margin: 1.5rem 0 0.75rem;
  font-size: 1.35rem;
}

.card-link {
  margin-top: auto;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.85rem;
  font-weight: 700;
}

.maturity {
  width: fit-content;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0.2rem 0.55rem;
  font: 700 0.72rem/1.4 var(--mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.maturity-stable {
  color: var(--accent);
}

.maturity-preview {
  color: #93c5fd;
}

.maturity-experimental {
  color: var(--warning);
}

.docs-main {
  max-width: 68rem;
}

.docs-heading {
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--line);
}

.docs-heading .maturity {
  margin-bottom: 1.5rem;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.doc-card h2 {
  margin-top: 0;
}

.doc-card ul {
  padding-left: 1.2rem;
}

.doc-card li + li {
  margin-top: 0.5rem;
}

.doc-card a,
.callout a {
  color: var(--accent);
}

.callout {
  margin-top: 1rem;
  border-left: 4px solid var(--accent);
  padding: 1.25rem 1.5rem;
  background: var(--panel);
}

.callout h2 {
  margin-bottom: 0.5rem;
}

.gallery-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.coverage-proof {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  font: 700 0.8rem/1.4 var(--mono);
}

.coverage-proof::before {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: currentColor;
  content: "";
}

.manifesto h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

footer {
  min-height: 6rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.9rem;
}

footer p {
  margin: 0;
}

.playground-main {
  padding: 3rem 0 5rem;
}

.playground-heading {
  max-width: 52rem;
  margin-bottom: 2rem;
}

.playground-heading h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.055em;
}

.playground-heading > p:last-child {
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.85fr);
  gap: 1rem;
  align-items: start;
}

.editor-panel,
.results-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(17, 26, 45, 0.96);
}

.panel-header {
  min-height: 3.5rem;
  padding: 0.7rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
}

.panel-header h2 {
  margin: 0;
  font: 700 0.9rem/1 var(--mono);
  letter-spacing: 0.04em;
}

.field-label {
  display: block;
  color: var(--muted);
}

textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  color: var(--ink);
  background: #080d18;
  font: 0.9rem/1.55 var(--mono);
}

textarea {
  min-height: 32rem;
  padding: 1rem;
  resize: vertical;
  border: 0;
  border-radius: 0;
  tab-size: 2;
}

select {
  min-height: 2.75rem;
  padding: 0.5rem 2rem 0.5rem 0.75rem;
}

.editor-controls {
  padding: 1rem;
  display: grid;
  grid-template-columns: minmax(9rem, 1fr) auto;
  gap: 1rem;
  align-items: end;
  border-top: 1px solid var(--line);
}

.editor-controls .toolbar {
  justify-content: end;
}

.status {
  min-height: 3.5rem;
  margin: 0;
  padding: 1rem;
  display: flex;
  align-items: center;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.status[data-kind="success"] {
  color: var(--accent);
}

.status[data-kind="error"] {
  color: var(--danger);
}

.summary-grid {
  margin: 0;
  padding: 1rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.6rem;
}

.summary-grid div {
  min-width: 0;
  padding: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  background: var(--panel-raised);
}

.summary-grid dt {
  color: var(--muted);
  font: 0.7rem/1.3 var(--mono);
  text-transform: uppercase;
}

.summary-grid dd {
  margin: 0.25rem 0 0;
  font: 700 1.5rem/1 var(--mono);
}

.result-section {
  padding: 1rem;
  border-top: 1px solid var(--line);
}

.result-section h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.result-section ol,
.result-section ul {
  margin: 0;
  padding-left: 1.3rem;
}

.result-section li + li {
  margin-top: 0.75rem;
}

.result-section code {
  color: var(--accent);
  font-family: var(--mono);
}

.empty {
  color: var(--muted);
}

.diagnostic {
  color: #fecdd3;
}

.diagnostic-location {
  color: var(--muted);
  font-family: var(--mono);
}

.hidden {
  display: none !important;
}

.result-actions {
  padding: 1rem;
  border-top: 1px solid var(--line);
}

.privacy-note {
  margin: 1rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

@media (max-width: 48rem) {
  .site-header {
    align-items: flex-start;
    padding: 0.8rem 0;
  }

  nav {
    flex-wrap: wrap;
    justify-content: end;
  }

  .feature-grid,
  .volume-grid,
  .doc-grid,
  .gallery-grid,
  .manifesto,
  .workspace {
    grid-template-columns: 1fr;
  }

  .feature-grid article {
    min-height: 0;
    padding: 2rem 0;
  }

  .feature-grid article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
    padding-left: 0;
  }

  .manifesto {
    gap: 2rem;
  }

  .editor-controls {
    grid-template-columns: 1fr;
  }

  .editor-controls .toolbar {
    justify-content: stretch;
  }

  .editor-controls button {
    flex: 1;
  }

  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  footer {
    padding: 1rem 0;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}

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

  .volume-card {
    transition: none;
  }
}