:root {
  color-scheme: dark;
  --bg: #0c0b0f;
  --bg-soft: #141118;
  --panel: rgba(255, 246, 229, 0.06);
  --panel-strong: rgba(255, 246, 229, 0.1);
  --text: #f5efe3;
  --muted: #b8aea1;
  --line: rgba(255, 246, 229, 0.14);
  --amber: #f3b45a;
  --crimson: #8a2a3f;
  --teal: #2a5f66;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  font-family: "Inter", "Helvetica Neue", Arial, sans-serif;
  background:
    radial-gradient(circle at top left, rgba(138, 42, 63, 0.22), transparent 32%),
    radial-gradient(circle at 78% 18%, rgba(42, 95, 102, 0.16), transparent 28%),
    linear-gradient(180deg, #121016 0%, #0c0b0f 38%, #0a090d 100%);
  color: var(--text);
}

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

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

.page-shell {
  position: relative;
  overflow: clip;
}

.page-shell::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(transparent 0, rgba(255, 255, 255, 0.02) 48%, transparent 52%),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.015) 0,
      rgba(255, 255, 255, 0.015) 1px,
      transparent 1px,
      transparent 120px
    );
  pointer-events: none;
  opacity: 0.36;
}

.inner {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(16px);
  background: rgba(10, 9, 13, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  background: rgba(10, 9, 13, 0.86);
}

.header-row,
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
}

.brand-wordmark {
  width: 164px;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.95rem;
  color: var(--muted);
}

.site-nav a {
  position: relative;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--amber), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.hero-band,
.signals-band,
.preview-band,
.standards-band,
.site-footer {
  position: relative;
}

.hero-band {
  padding: 88px 0 72px;
}

.signals-band,
.preview-band,
.standards-band {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--amber);
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 11ch;
  margin-bottom: 20px;
  font-size: 4.25rem;
  line-height: 0.98;
  font-weight: 600;
}

h2 {
  margin-bottom: 0;
  max-width: 13ch;
  font-size: 2.7rem;
  line-height: 1.02;
  font-weight: 600;
}

h3 {
  margin-bottom: 14px;
  font-size: 1.2rem;
  line-height: 1.15;
  font-weight: 600;
}

.hero-text,
.section-copy,
.signal-card p,
.preview-card p,
.faq-list p,
.footer-copy,
.footer-meta {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.7;
}

.hero-text {
  max-width: 34rem;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-weight: 600;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--amber), #ffd7a1);
  color: #1b1510;
  box-shadow: 0 10px 30px rgba(243, 180, 90, 0.28);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 246, 229, 0.02);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.hero-metrics li {
  min-height: 112px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 246, 229, 0.05), rgba(255, 246, 229, 0.01));
}

.metric-value {
  display: block;
  margin-bottom: 10px;
  font-size: 1.75rem;
  font-weight: 600;
}

.metric-label {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.hero-visual {
  margin: 0;
}

.hero-artwork {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid rgba(255, 246, 229, 0.1);
  box-shadow: var(--shadow);
}

.hero-visual figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 36px;
}

.split-heading {
  flex-direction: row;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
}

.split-heading .section-copy {
  max-width: 34rem;
  margin-bottom: 4px;
}

.signal-grid,
.preview-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.signal-card,
.preview-card,
.faq-list article {
  min-height: 100%;
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 246, 229, 0.05), rgba(255, 246, 229, 0.015)),
    radial-gradient(circle at top right, rgba(42, 95, 102, 0.14), transparent 45%);
}

.signal-index,
.preview-tag,
.footer-title {
  margin-bottom: 18px;
  color: var(--amber);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.preview-card span {
  display: inline-block;
  margin-top: 18px;
  color: #d8cab3;
  font-size: 0.9rem;
}

.standards-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 32px;
  align-items: start;
}

.faq-list {
  display: grid;
  gap: 18px;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 18px 0 34px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-mark {
  width: 48px;
  height: 48px;
  border-radius: 8px;
}

.footer-copy,
.footer-meta {
  margin: 0;
}

@media (max-width: 980px) {
  h1 {
    font-size: 3.4rem;
  }

  h2 {
    font-size: 2.2rem;
  }

  .hero-grid,
  .standards-grid,
  .split-heading {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: start;
  }

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

@media (max-width: 720px) {
  .inner {
    width: min(100% - 32px, 1120px);
  }

  .header-row,
  .footer-row,
  .site-nav,
  .hero-actions,
  .hero-metrics {
    flex-direction: column;
    align-items: stretch;
  }

  .header-row,
  .footer-row {
    gap: 18px;
  }

  .site-nav {
    gap: 12px;
  }

  .hero-band {
    padding-top: 48px;
  }

  h1 {
    max-width: 10ch;
    font-size: 2.8rem;
  }

  h2 {
    max-width: none;
    font-size: 1.96rem;
  }

  .hero-metrics {
    grid-template-columns: 1fr;
  }

  .metric-value {
    font-size: 1.4rem;
  }

  .footer-brand {
    align-items: flex-start;
  }
}