:root {
  color-scheme: light;
  --ink: #18201d;
  --muted: #5f6f67;
  --line: #d8e1dc;
  --paper: #fbfcfa;
  --panel: #ffffff;
  --green: #217a52;
  --green-soft: #e5f3eb;
  --amber: #b36b12;
  --coral: #b94f3a;
  --blue: #35689b;
}

* {
  box-sizing: border-box;
}

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

a {
  color: inherit;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 40px;
  border-bottom: 1px solid var(--line);
  background: rgba(251, 252, 250, 0.96);
}

.brand {
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 0.95rem;
}

nav a {
  text-decoration: none;
}

.button-link,
.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
}

.button-link,
.primary-action {
  color: #ffffff;
  background: var(--green);
}

.secondary-action {
  color: var(--green);
  border: 1px solid var(--line);
  background: var(--panel);
}

.intro-band {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 64px 40px 80px;
  border-bottom: 1px solid var(--line);
}

.intro-copy,
.proof-band,
.principles-band,
.docs-layout {
  width: min(1120px, 100%);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2.5rem, 5vw, 5.3rem);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
  letter-spacing: 0;
}

.lede {
  max-width: 660px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1.18rem;
  line-height: 1.6;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.product-preview {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 24px 60px rgba(24, 32, 29, 0.12);
  padding: 24px;
}

.preview-topline,
.preview-grid {
  display: grid;
  gap: 12px;
}

.preview-topline {
  grid-template-columns: 1fr auto;
  color: var(--muted);
}

.preview-topline strong,
.preview-grid strong {
  color: var(--ink);
}

.timeline-strip {
  display: grid;
  grid-template-columns: 2fr 1fr 0.8fr 0.7fr;
  gap: 8px;
  height: 72px;
  margin: 28px 0;
}

.segment {
  border-radius: 6px;
}

.video { background: var(--green-soft); }
.screenshot { background: #f5e7cb; }
.file { background: #dcebf7; }
.audio { background: #f3dad4; }

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

.preview-grid div {
  min-width: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.preview-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.preview-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 0.95rem;
}

.proof-band,
.principles-band,
.docs-layout {
  margin: 0 auto;
  padding: 64px 40px;
}

.proof-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.proof-band article {
  min-height: 170px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.proof-band p,
.principles-band p,
.docs-layout p {
  margin: 0;
  color: var(--muted);
  line-height: 1.58;
}

.principles-band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 48px;
  border-top: 1px solid var(--line);
}

.docs-layout {
  max-width: 880px;
}

.docs-layout h1 {
  margin-bottom: 32px;
  font-size: clamp(2.2rem, 4vw, 4rem);
}

.docs-layout section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

@media (max-width: 900px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 20px;
  }

  nav {
    flex-wrap: wrap;
  }

  .intro-band,
  .proof-band,
  .principles-band {
    grid-template-columns: 1fr;
  }

  .intro-band {
    min-height: auto;
    padding: 48px 20px 64px;
  }

  .proof-band,
  .principles-band,
  .docs-layout {
    padding: 44px 20px;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: 2.45rem;
  }

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