:root {
  --bg: #0b0d12;
  --panel: #11151b;
  --panel-soft: #151a22;
  --line: #232a35;
  --text: #eef2f7;
  --muted: #9aa5b4;
  --accent: #d7e2f0;
  --link: #c7d6e9;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --shell: 920px;
  --radius: 12px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.55;
  color-scheme: dark;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
  background: none;
  color: inherit;
  cursor: pointer;
}

code,
pre {
  font-family: var(--font-mono);
}

pre {
  margin: 0;
  white-space: pre-wrap;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 12px;
}

.skip-link:focus {
  left: 12px;
  z-index: 10;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
}

.shell {
  width: min(var(--shell), calc(100vw - 32px));
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky;
  top: 0;
}

.header-row,
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 58px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand strong {
  display: block;
  font-size: 0.92rem;
}

.brand span span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.brand-mark {
  width: 16px;
  height: 16px;
  border-radius: 3px;
  background: linear-gradient(135deg, #dbe5f1, #91a6bd);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.16);
}

.site-nav,
.footer-links,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.site-nav a,
.footer-links a {
  color: var(--muted);
  font-size: 0.88rem;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.footer-links a:hover,
.footer-links a:focus-visible,
.link-card:hover,
.link-card:focus-visible {
  color: var(--text);
}

.page {
  padding: 24px 0 48px;
}

.hero,
.section {
  padding: 16px 0 20px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 0.76rem;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero h1,
.page-title {
  font-size: clamp(1.7rem, 3.6vw, 2.35rem);
  max-width: 15ch;
}

.section-head {
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: 1.14rem;
}

.lede,
.section-head p,
.demo-text,
.link-card span,
.card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  color: var(--accent);
}

.button-primary {
  background: var(--accent);
  color: #0b0d12;
  border-color: var(--accent);
  font-weight: 600;
}

.button-small {
  min-height: 28px;
  font-size: 0.8rem;
}

.hero-grid,
.demo-body {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.panel,
.card,
.link-card,
.table-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.panel,
.card,
.link-card {
  padding: 14px;
}

.panel-code,
.card pre {
  background: var(--panel-soft);
}

.panel-head,
.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.panel-head span,
.card-top span,
.demo-label {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.key-list {
  margin: 12px 0 0;
  padding-left: 18px;
}

.key-list li + li {
  margin-top: 8px;
}

.mini-table {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.mini-table div {
  padding: 10px 11px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-soft);
}

.mini-table span {
  display: block;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.mini-table strong {
  display: block;
  margin-top: 6px;
  font-size: 0.92rem;
  font-weight: 600;
}

.card-grid,
.link-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.card h3 {
  font-size: 0.96rem;
  margin-bottom: 8px;
}

.card pre,
.panel pre {
  overflow: auto;
  border-radius: 10px;
  border: 1px solid var(--line);
}

.card code,
.panel code {
  display: block;
  padding: 10px;
  color: #e8edf6;
  font-size: 0.88rem;
}

.demo {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
}

.demo-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  padding: 10px;
  border-bottom: 1px solid var(--line);
}

.demo-body {
  padding: 10px;
  margin-top: 0;
}

.demo-tab {
  min-height: 30px;
  padding: 0 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  color: var(--muted);
}

.demo-tab.is-active {
  background: var(--accent);
  color: #0b0d12;
  border-color: var(--accent);
}

.table-panel {
  overflow: hidden;
}

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

.info-table th,
.info-table td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.info-table th {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 500;
}

.link-card {
  display: block;
}

.link-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.94rem;
}

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

.toast {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%) translateY(16px);
  opacity: 0;
  pointer-events: none;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  color: var(--text);
  transition: opacity 120ms ease, transform 120ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 760px) {
  .header-row,
  .footer-row,
  .hero-grid,
  .demo-body,
  .card-grid,
  .link-grid,
  .mini-table {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: flex-start;
  }

  .page {
    padding-top: 20px;
  }

  .hero h1,
  .page-title {
    max-width: none;
  }
}