:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --ink: #f7f3e8;
  --muted: #b9b5aa;
  --line: rgba(247, 243, 232, 0.16);
  --panel: rgba(18, 22, 27, 0.82);
  --panel-strong: rgba(247, 243, 232, 0.08);
  --red: #df5b4f;
  --green: #57bd89;
  --gold: #d9b65c;
  --blue: #74a7e8;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  overflow-x: hidden;
}

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

code,
pre,
.brand,
.eyebrow,
.item-label,
.metric-strip,
.site-footer {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

#signal-canvas {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid rgba(247, 243, 232, 0.08);
  background: rgba(11, 13, 16, 0.76);
  backdrop-filter: blur(18px);
}

.brand {
  font-size: 0.95rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.7rem, 3vw, 1.5rem);
  color: var(--muted);
  font-size: 0.92rem;
}

.nav-links a {
  transition: color 160ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--ink);
}

main {
  position: relative;
}

.hero {
  min-height: 82vh;
  display: grid;
  align-content: end;
  padding: 8.5rem clamp(1rem, 6vw, 5rem) 3rem;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--gold);
  font-size: 0.78rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 9ch;
  margin: 0;
  font-size: clamp(4.1rem, 14vw, 10rem);
  line-height: 0.88;
  letter-spacing: 0;
}

h2,
h3,
p {
  margin-top: 0;
}

.lede {
  max-width: 880px;
  margin: 1.5rem 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.38rem);
  line-height: 1.7;
}

.metric-strip {
  width: min(100%, 980px);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 3rem;
  border: 1px solid var(--line);
  background: var(--line);
}

.metric-strip span {
  min-height: 4.5rem;
  display: grid;
  align-content: center;
  gap: 0.25rem;
  padding: 0.85rem 1rem;
  background: rgba(11, 13, 16, 0.82);
  color: var(--muted);
  font-size: 0.84rem;
}

.metric-strip strong {
  color: var(--ink);
  font-size: 1.45rem;
}

.section-block {
  display: grid;
  grid-template-columns: minmax(9rem, 0.62fr) minmax(0, 1.9fr);
  gap: clamp(1.4rem, 4vw, 4rem);
  padding: clamp(4rem, 8vw, 6.8rem) clamp(1rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
  background: rgba(11, 13, 16, 0.68);
}

.compact-section {
  padding-bottom: clamp(5rem, 9vw, 8rem);
}

.section-heading {
  position: sticky;
  top: 6rem;
  align-self: start;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3.15rem);
  line-height: 1;
}

.flow-list {
  display: grid;
  gap: 0.85rem;
}

.flow-step,
.rule-card,
.output-panel,
.code-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.flow-step {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr);
  gap: 1rem;
  padding: clamp(1rem, 2.5vw, 1.35rem);
}

.flow-step span {
  width: 2.25rem;
  height: 2.25rem;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--gold);
  font-weight: 700;
}

.flow-step h3,
.rule-card h3,
.output-panel h3 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.1rem, 2vw, 1.38rem);
}

.flow-step p,
.rule-card p,
.output-panel p,
.code-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.flow-step p + p,
.output-panel p + p {
  margin-top: 0.9rem;
}

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

.rule-card {
  min-height: 15rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(1.1rem, 3vw, 1.55rem);
  border-top: 3px solid var(--red);
}

.rule-card:nth-child(2),
.rule-card:nth-child(5) {
  border-top-color: var(--green);
}

.rule-card:nth-child(3),
.rule-card:nth-child(6) {
  border-top-color: var(--blue);
}

.item-label {
  margin: 0 0 auto;
  color: var(--gold);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.output-panel {
  display: grid;
  grid-template-columns: minmax(15rem, 0.9fr) minmax(0, 1.3fr);
  align-items: center;
  gap: clamp(1.25rem, 4vw, 2.5rem);
  padding: clamp(1.1rem, 3vw, 1.8rem);
}

.chart-mock {
  min-height: 20rem;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(rgba(247, 243, 232, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247, 243, 232, 0.06) 1px, transparent 1px),
    rgba(247, 243, 232, 0.04);
  background-size: 100% 20%, 16.66% 100%, auto;
}

.mock-line {
  position: absolute;
  left: 8%;
  right: 8%;
  height: 2px;
  transform-origin: left center;
}

.line-a {
  top: 36%;
  background: var(--blue);
  transform: rotate(-8deg);
}

.line-b {
  top: 46%;
  background: var(--gold);
  transform: rotate(-3deg);
}

.line-c {
  top: 57%;
  background: var(--green);
  transform: rotate(5deg);
}

.mock-bars {
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: 10%;
  height: 26%;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  align-items: end;
  gap: 0.65rem;
}

.mock-bars i {
  display: block;
  min-height: 18%;
  background: var(--green);
}

.mock-bars i:nth-child(2n) {
  background: var(--red);
}

.mock-bars i:nth-child(1) { height: 92%; }
.mock-bars i:nth-child(2) { height: 70%; }
.mock-bars i:nth-child(3) { height: 58%; }
.mock-bars i:nth-child(4) { height: 45%; }
.mock-bars i:nth-child(5) { height: 38%; }
.mock-bars i:nth-child(6) { height: 31%; }
.mock-bars i:nth-child(7) { height: 24%; }
.mock-bars i:nth-child(8) { height: 18%; }

.code-panel {
  padding: clamp(1.1rem, 3vw, 1.7rem);
}

pre {
  margin: 0 0 1rem;
  padding: 1rem;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.24);
  color: var(--ink);
  font-size: 0.95rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem clamp(1rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 820px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
  }

  .nav-links {
    gap: 0.7rem;
    font-size: 0.84rem;
  }

  .hero {
    min-height: 84vh;
    padding-top: 7rem;
  }

  h1 {
    font-size: clamp(3.4rem, 19vw, 5.5rem);
  }

  .metric-strip,
  .section-block,
  .rule-grid,
  .output-panel {
    grid-template-columns: 1fr;
  }

  .section-heading {
    position: static;
  }
}

@media (max-width: 520px) {
  .site-footer,
  .flow-step {
    grid-template-columns: 1fr;
  }

  .site-footer {
    display: grid;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}