:root {
  --bg: #d5e0e4;
  --sheet: #f7fafb;
  --ink: #142126;
  --muted: #4a5c63;
  --line: #c3d0d5;
  --teal: #0c5f5b;
  --teal-deep: #083f3c;
  --signal: #b8431f;
  --signal-deep: #8c3016;
  --warm: #f4efe6;
  --header: 4.25rem;
  --measure: 66ch;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header) + 8px);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0) 220px),
    var(--bg);
  font-family: Aptos, "Trebuchet MS", "Segoe UI", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--teal-deep);
}

a:hover {
  color: var(--signal-deep);
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--ink);
  color: var(--sheet);
  padding: 8px 12px;
  z-index: 30;
}

.skip:focus {
  top: 8px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--header);
  background: rgba(247, 250, 251, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.header-bar {
  max-width: 1160px;
  margin: 0 auto;
  height: var(--header);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.01em;
  flex: 0 0 auto;
  white-space: nowrap;
}

.brand img {
  width: 32px;
  height: 32px;
  flex: none;
}

.brand span {
  font-size: 0.98rem;
}

.nav-toggle {
  margin-left: auto;
  border: 1px solid var(--line);
  background: var(--sheet);
  color: var(--ink);
  min-height: 40px;
  padding: 0 12px;
  font: inherit;
  cursor: pointer;
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  gap: 8px 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--ink);
  text-decoration: none;
  font-size: 0.92rem;
  border-bottom: 2px solid transparent;
  padding: 6px 0;
}

.site-nav a:hover {
  border-bottom-color: var(--teal);
  color: var(--teal-deep);
}

.wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
}

.hero {
  padding: 36px 0 12px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 28px;
  align-items: start;
}

.index-kicker {
  margin: 0 0 8px;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--teal);
  text-transform: uppercase;
}

h1 {
  margin: 0 0 14px;
  font-size: clamp(1.85rem, 4vw, 2.7rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 18ch;
}

.lede {
  max-width: var(--measure);
  margin: 0 0 18px;
  color: var(--muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  min-height: 52px;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 220px;
  padding: 0 18px;
  background: var(--signal);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
}

.cta:hover {
  background: var(--signal-deep);
  color: #fff;
}

.cta-note {
  font-size: 0.88rem;
  color: var(--muted);
}

.record-card {
  background: var(--sheet);
  border: 1px solid var(--line);
  border-top: 4px solid var(--teal);
  padding: 16px 16px 8px;
}

.record-card h2 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.record-card dl {
  margin: 0;
}

.record-card div {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 8px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.record-card dt {
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
}

.record-card dd {
  margin: 0;
}

.panel-figure {
  margin: 14px 0 8px;
}

.band {
  padding: 28px 0;
}

.sheet {
  background: var(--sheet);
  border: 1px solid var(--line);
  padding: 28px 24px 8px;
}

h2 {
  margin: 0 0 12px;
  font-size: clamp(1.4rem, 2.4vw, 1.85rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h3 {
  margin: 22px 0 8px;
  font-size: 1.12rem;
}

p {
  max-width: var(--measure);
}

.steps {
  list-style: none;
  margin: 18px 0 8px;
  padding: 0;
  counter-reset: step;
}

.steps li {
  position: relative;
  margin: 0 0 14px;
  padding: 0 0 0 52px;
  max-width: 68ch;
}

.steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0;
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.82rem;
  color: var(--teal);
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  margin: 18px 0 20px;
}

.split article {
  background: var(--warm);
  border: 1px solid #e4d9c8;
  padding: 14px 14px 4px;
  min-height: 180px;
}

.split h3 {
  margin-top: 0;
}

.specs {
  width: 100%;
  border-collapse: collapse;
  margin: 8px 0 22px;
  font-size: 0.98rem;
}

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

.specs th {
  width: 28%;
  font-weight: 700;
}

.legal {
  background: var(--warm);
  border-top: 1px solid #e4d9c8;
  padding: 32px 0 12px;
}

.site-footer {
  background: var(--ink);
  color: #d5e0e4;
  padding: 32px 0 20px;
}

.site-footer a {
  color: #f4efe6;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr;
  gap: 24px;
}

.site-footer h2 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.updated {
  margin-top: 22px;
  padding-top: 12px;
  border-top: 1px solid rgba(213, 224, 228, 0.25);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.85rem;
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: var(--header);
    background: var(--sheet);
    border-bottom: 1px solid var(--line);
    padding: 8px 20px 14px;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    gap: 0;
  }

  .hero-grid,
  .split,
  .foot-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: none;
  }
}

@media (min-width: 861px) {
  .nav-toggle {
    display: none;
  }
}

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