:root {
  color-scheme: light;
  --paper: #f8fafc;
  --ink: #020617;
  --body: #334155;
  --accent: #0e7490;
  --accent-soft: #ecfeff;
  --line: #cbd5e1;
  --white: #ffffff;
  --shell: 1180px;
  --sans: "Avenir Next", Avenir, "Helvetica Neue", Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: absolute;
  top: 0;
  left: 1rem;
  z-index: 50;
  padding: 0.65rem 1rem;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-120%);
}

.skip-link:focus {
  transform: translateY(0);
}

.shell {
  width: min(calc(100% - 3rem), var(--shell));
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(248, 250, 252, 0.94);
}

.header-inner,
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.75rem;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 750;
  letter-spacing: -0.02em;
}

.brand svg {
  width: 2rem;
  height: auto;
}

.brand path {
  fill: none;
  stroke: var(--accent);
  stroke-linecap: square;
  stroke-linejoin: bevel;
  stroke-width: 2.4;
}

.site-nav,
.footer-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a,
.footer-links a {
  color: var(--body);
  font-size: 0.875rem;
  font-weight: 600;
}

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

.header-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.75rem;
  padding: 0 1rem;
  border: 1px solid var(--ink);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 700;
}

.header-link:hover {
  background: var(--ink);
  color: var(--white);
}

.hero {
  padding: clamp(5rem, 9vw, 8.5rem) 0 clamp(5rem, 8vw, 7.5rem);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(31rem, 1.1fr);
  align-items: center;
  gap: clamp(3rem, 7vw, 7rem);
}

.eyebrow,
.kicker {
  margin: 0 0 1.25rem;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
  text-transform: uppercase;
}

.eyebrow span {
  margin-left: 0.75rem;
  color: var(--body);
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2 {
  text-wrap: balance;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(3.5rem, 7vw, 6.8rem);
  font-weight: 750;
  letter-spacing: -0.072em;
  line-height: 0.9;
}

h1 span {
  color: var(--accent);
}

.hero-lede {
  max-width: 37rem;
  margin: 2rem 0 0;
  color: var(--body);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
}

.hero-actions,
.closing-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.25rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  min-height: 3.25rem;
  padding: 0 1.25rem;
  border: 1px solid transparent;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  font-weight: 750;
}

.button-primary {
  background: var(--ink);
  color: var(--white);
}

.button-primary:hover {
  background: var(--accent);
}

.install-command {
  padding: 0.85rem 0;
  color: var(--body);
  font-family: var(--mono);
  font-size: 0.875rem;
}

.install-command::before {
  content: "$";
  margin-right: 0.75rem;
  color: var(--accent);
}

.requirement {
  margin: 1.4rem 0 0;
  color: #64748b;
  font-size: 0.78rem;
}

.signal-console {
  margin: 0;
  overflow: hidden;
  border: 1px solid #1e293b;
  border-radius: 0.75rem;
  background: var(--ink);
  color: var(--white);
  box-shadow: 1.25rem 1.25rem 0 var(--accent-soft);
}

.console-bar,
.code-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 3.5rem;
  padding: 0 1.25rem;
  border-bottom: 1px solid #1e293b;
  color: #94a3b8;
  font-family: var(--mono);
  font-size: 0.72rem;
}

.console-bar span:first-child,
.code-titlebar span:first-child {
  color: var(--white);
}

.wave-stage {
  padding: 1.5rem;
}

.wave-stage svg {
  display: block;
  width: 100%;
  height: auto;
}

.wave-grid path {
  fill: none;
  stroke: #1e293b;
  stroke-width: 1;
}

.wave-line,
.wave-shadow,
.playhead {
  fill: none;
}

.wave-shadow {
  stroke: rgba(8, 145, 178, 0.22);
  stroke-width: 18;
}

.wave-line {
  stroke: #22d3ee;
  stroke-width: 3;
}

.playhead {
  stroke: #f8fafc;
  stroke-dasharray: 4 7;
  stroke-width: 1;
}

.signal-console figcaption {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid #1e293b;
  color: #94a3b8;
  font-family: var(--mono);
  font-size: 0.68rem;
}

.signal-console figcaption span {
  padding: 1rem 1.1rem;
  border-right: 1px solid #1e293b;
}

.signal-console figcaption span:last-child {
  border-right: 0;
}

.signal-console figcaption b {
  margin-right: 0.5rem;
  color: #22d3ee;
}

.signal-section,
.example-section,
.formats-section {
  padding: clamp(5rem, 9vw, 8rem) 0;
}

.signal-section {
  background: var(--white);
}

.section-heading {
  display: grid;
  grid-template-columns: 0.35fr 1fr;
  align-items: start;
  gap: 2rem;
  margin-bottom: 4rem;
}

.section-heading h2,
.example-copy h2,
.formats-copy h2,
.closing-inner h2 {
  margin: 0;
  font-size: clamp(2.3rem, 5vw, 4.5rem);
  font-weight: 720;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.section-heading h2 {
  max-width: 17ch;
}

.signal-chain {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--ink);
}

.signal-chain article {
  min-width: 0;
  padding: 1.5rem 1.5rem 0 0;
  border-right: 1px solid var(--line);
}

.signal-chain article + article {
  padding-left: 1.5rem;
}

.signal-chain article:last-child {
  border-right: 0;
}

.step-marker {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 0.72rem;
}

.signal-chain h3 {
  margin: 2rem 0 0.6rem;
  font-size: 1.2rem;
  letter-spacing: -0.025em;
}

.signal-chain p,
.example-copy > p,
.formats-copy > p {
  margin: 0;
  color: var(--body);
  font-size: 0.92rem;
}

.example-section {
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.example-grid,
.formats-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(30rem, 1.22fr);
  align-items: center;
  gap: clamp(3rem, 8vw, 8rem);
}

.example-copy h2,
.formats-copy h2 {
  margin-bottom: 1.5rem;
}

.example-copy > p,
.formats-copy > p {
  font-size: 1rem;
  line-height: 1.75;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-top: 2rem;
  border-bottom: 1px solid currentColor;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 750;
}

.code-window {
  overflow: hidden;
  border: 1px solid #1e293b;
  border-radius: 0.75rem;
  background: var(--ink);
  box-shadow: -1.25rem 1.25rem 0 var(--accent-soft);
}

.code-window pre {
  margin: 0;
  overflow-x: auto;
  padding: 1.75rem;
  color: #cbd5e1;
  font-family: var(--mono);
  font-size: clamp(0.75rem, 1.5vw, 0.88rem);
  line-height: 1.8;
  tab-size: 2;
}

.code-keyword,
.code-symbol {
  color: #67e8f9;
}

.code-string {
  color: #bae6fd;
}

.code-number {
  color: #f8fafc;
}

.formats-section {
  border-top: 1px solid var(--line);
  background: var(--white);
}

.format-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--ink);
}

.format-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}

.format-list strong {
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  letter-spacing: -0.045em;
}

.format-list span {
  color: var(--body);
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
}

.closing-section {
  padding: clamp(4rem, 8vw, 7rem) 0;
  background: var(--ink);
  color: var(--white);
}

.closing-inner {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 3rem;
}

.closing-inner h2 {
  max-width: 13ch;
}

.closing-actions {
  justify-content: flex-end;
  margin: 0;
}

.closing-actions code {
  color: #cbd5e1;
  font-family: var(--mono);
  font-size: 0.82rem;
}

.closing-actions code::before {
  content: "$";
  margin-right: 0.65rem;
  color: #22d3ee;
}

.button-light {
  background: var(--white);
  color: var(--ink);
}

.button-light:hover {
  background: var(--accent-soft);
}

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

.footer-inner p {
  margin: 0;
  color: var(--body);
  font-size: 0.8rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .example-grid,
  .formats-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid,
  .example-grid,
  .formats-grid {
    gap: 4rem;
  }

  .hero-copy {
    max-width: 44rem;
  }

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

  .signal-chain article {
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--line);
  }

  .signal-chain article:nth-child(2n) {
    border-right: 0;
  }

  .signal-chain article:last-child {
    border-right: 1px solid var(--line);
  }

  .closing-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .closing-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 680px) {
  .shell {
    width: min(calc(100% - 2rem), var(--shell));
  }

  .site-nav {
    display: none;
  }

  .header-inner {
    min-height: 4.25rem;
  }

  .header-link {
    min-height: 2.5rem;
  }

  .hero {
    padding-top: 4.25rem;
  }

  h1 {
    font-size: clamp(3rem, 14vw, 4.25rem);
  }

  .signal-console {
    box-shadow: 0.65rem 0.65rem 0 var(--accent-soft);
  }

  .console-bar span:last-child {
    display: none;
  }

  .wave-stage {
    padding: 0.75rem;
  }

  .signal-console figcaption {
    grid-template-columns: 1fr;
  }

  .signal-console figcaption span {
    border-right: 0;
    border-bottom: 1px solid #1e293b;
  }

  .signal-console figcaption span:last-child {
    border-bottom: 0;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 0.25rem;
    margin-bottom: 3rem;
  }

  .signal-chain {
    grid-template-columns: 1fr;
  }

  .signal-chain article,
  .signal-chain article + article,
  .signal-chain article:last-child {
    padding: 1.25rem 0 1.75rem;
    border-right: 0;
  }

  .signal-chain h3 {
    margin-top: 1.25rem;
  }

  .code-window {
    width: calc(100% - 0.65rem);
    box-shadow: 0.65rem 0.65rem 0 var(--accent-soft);
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 2rem 0;
    gap: 1rem;
  }

  .footer-links {
    gap: 1.25rem;
  }
}

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