:root {
  color-scheme: light;
  --ink: #102033;
  --muted: #5b6675;
  --paper: #fffaf0;
  --surface: #ffffff;
  --line: #d9d2c5;
  --accent: #d84f3f;
  --accent-dark: #a93226;
  --navy: #12243a;
  --code: #101823;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(20px, 5vw, 64px);
  border-bottom: 1px solid rgba(16, 32, 51, 0.12);
  background: rgba(255, 250, 240, 0.94);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
}

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

.hero {
  min-height: calc(100vh - 64px);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 520px);
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
  padding: clamp(56px, 8vw, 96px) clamp(20px, 5vw, 64px);
  background:
    linear-gradient(rgba(16, 32, 51, 0.82), rgba(16, 32, 51, 0.76)),
    repeating-linear-gradient(135deg, #183353 0 18px, #12243a 18px 36px);
  color: #fff8e9;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.hero h1,
.section-heading h2 {
  margin: 0;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 860px;
  font-size: clamp(42px, 7vw, 86px);
  line-height: 0.98;
}

.lede {
  max-width: 740px;
  margin: 22px 0 0;
  color: rgba(255, 248, 233, 0.84);
  font-size: clamp(18px, 2.2vw, 22px);
  line-height: 1.55;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button,
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
  background: transparent;
  color: inherit;
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.button.primary,
button {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.button:hover,
button:hover {
  transform: translateY(-1px);
}

pre {
  margin: 0;
  overflow: auto;
  border-radius: 8px;
  background: var(--code);
  color: #f6f0df;
  font-size: 14px;
  line-height: 1.6;
}

code {
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

pre code {
  display: block;
  padding: 18px;
}

.hero-code {
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.28);
}

.features,
.example-grid,
.command-grid,
.playground-grid {
  display: grid;
  gap: 18px;
}

.features {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  padding: 28px clamp(20px, 5vw, 64px) 64px;
  background: #fff8e9;
}

.features article,
.example-grid article,
.editor-panel,
.output-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.features article,
.example-grid article {
  padding: 22px;
}

.features h2,
.example-grid h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.features p,
.example-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.band,
.examples,
.playground {
  padding: 72px clamp(20px, 5vw, 64px);
}

.band {
  background: var(--surface);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 24px;
}

.section-heading h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
}

.command-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.link-row a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff8e9;
  color: var(--ink);
  font-weight: 750;
}

.link-row a:hover {
  border-color: var(--accent);
}

.example-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.example-grid article pre {
  height: 100%;
}

.playground {
  background: #fff8e9;
}

.playground-grid {
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: stretch;
}

.editor-panel,
.output-panel {
  min-height: 430px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.editor-panel span,
.output-header {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  font-weight: 750;
}

textarea {
  flex: 1;
  width: 100%;
  min-height: 360px;
  resize: vertical;
  border: 0;
  outline: 0;
  padding: 18px;
  color: #f6f0df;
  background: var(--code);
  font: 14px/1.6 "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

#output {
  flex: 1;
  min-height: 360px;
  border-radius: 0;
  white-space: pre-wrap;
}

#output.error {
  color: #ffd8d4;
}

.playground-note {
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.55;
}

.footer {
  padding: 28px clamp(20px, 5vw, 64px);
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--surface);
}

@media (max-width: 900px) {
  .hero,
  .features,
  .command-grid,
  .example-grid,
  .playground-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }
}

@media (max-width: 620px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero h1 {
    font-size: 40px;
  }
}