:root,
html[data-theme='light'] {
  color-scheme: light dark;
  --font-sans: "Segoe UI Variable", "Aptos", "Helvetica Neue", "Nimbus Sans", sans-serif;
  --bg: #eef3f0;
  --bg-accent: rgba(15, 118, 110, 0.1);
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: rgba(255, 255, 255, 0.98);
  --surface-muted: rgba(244, 247, 245, 0.96);
  --border: rgba(15, 23, 42, 0.1);
  --border-strong: rgba(15, 118, 110, 0.34);
  --text: #10202b;
  --text-muted: #526673;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --accent-soft: rgba(20, 184, 166, 0.12);
  --shadow-soft: 0 22px 60px rgba(12, 18, 22, 0.12);
  --radius-lg: 1.7rem;
  --radius-md: 1.1rem;
  --transition-base: 160ms ease;
}

html[data-theme='dark'] {
  --bg: #0f1418;
  --bg-accent: rgba(94, 234, 212, 0.11);
  --surface: rgba(20, 28, 33, 0.84);
  --surface-strong: rgba(17, 23, 28, 0.94);
  --surface-muted: rgba(18, 25, 30, 0.92);
  --border: rgba(226, 232, 240, 0.1);
  --border-strong: rgba(94, 234, 212, 0.24);
  --text: #f2f8fb;
  --text-muted: #9ab0bc;
  --accent: #5eead4;
  --accent-strong: #99f6e4;
  --accent-soft: rgba(45, 212, 191, 0.18);
  --shadow-soft: 0 24px 70px rgba(4, 9, 12, 0.44);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0f1418;
    --bg-accent: rgba(94, 234, 212, 0.11);
    --surface: rgba(20, 28, 33, 0.84);
    --surface-strong: rgba(17, 23, 28, 0.94);
    --surface-muted: rgba(18, 25, 30, 0.92);
    --border: rgba(226, 232, 240, 0.1);
    --border-strong: rgba(94, 234, 212, 0.24);
    --text: #f2f8fb;
    --text-muted: #9ab0bc;
    --accent: #5eead4;
    --accent-strong: #99f6e4;
    --accent-soft: rgba(45, 212, 191, 0.18);
    --shadow-soft: 0 24px 70px rgba(4, 9, 12, 0.44);
  }
}

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

html {
  font-size: 16px;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-sans);
  background:
    radial-gradient(circle at top left, var(--bg-accent), transparent 25%),
    radial-gradient(circle at bottom right, rgba(245, 158, 11, 0.08), transparent 24%),
    var(--bg);
}

a {
  color: var(--accent-strong);
}

.page {
  width: min(100%, 76rem);
  margin: 0 auto;
  padding: 0.9rem 0.9rem 2.2rem;
}

.topbar,
.hero,
.section,
.footer {
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-strong) 92%, transparent);
  box-shadow: var(--shadow-soft);
  backdrop-filter: blur(16px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-radius: 1.45rem;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-size: 1.18rem;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.ghost-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
}

.hero,
.section {
  margin-top: 0.85rem;
  border-radius: var(--radius-lg);
  padding: 1rem;
}

.hero {
  display: grid;
  gap: 1rem;
}

.hero__copy {
  display: grid;
  gap: 0.8rem;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 0.68rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1,
.section h2 {
  margin: 0;
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.hero h1 {
  font-size: clamp(2.25rem, 8vw, 4.8rem);
  max-width: 10ch;
}

.lede,
.feature-card p,
.grid-card p,
.footer p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  transition:
    transform var(--transition-base),
    background var(--transition-base),
    border-color var(--transition-base);
}

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

.button--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #f7fffd;
}

.button--ghost {
  border: 1px solid var(--border);
  background: var(--surface-muted);
  color: var(--text);
}

.feature-card {
  display: grid;
  gap: 0.7rem;
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-muted) 88%, transparent);
}

.feature-card h2,
.grid-card h3 {
  margin: 0;
  letter-spacing: -0.03em;
}

.feature-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.section {
  display: grid;
  gap: 1rem;
}

.grid {
  display: grid;
  gap: 0.8rem;
}

.grid-card {
  display: grid;
  gap: 0.55rem;
  padding: 0.95rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface-muted) 86%, transparent);
}

.mini-note {
  font-size: 0.92rem;
  color: var(--text-muted);
}

.footer {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.85rem;
  padding: 0.95rem 1rem;
  border-radius: 1.35rem;
  justify-items: center;
  text-align: center;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  justify-content: center;
}

.footer-nav a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--accent-strong);
}

.footer-credit-link {
  color: inherit;
  text-decoration: none;
}

.footer-credit-link:hover {
  color: var(--accent-strong);
}

@media (min-width: 900px) {
  .page {
    padding: 1rem 1.25rem 2.75rem;
  }

  .hero {
    grid-template-columns: minmax(0, 1.2fr) minmax(18rem, 0.8fr);
    align-items: start;
    padding: 1.15rem;
  }

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

  .footer {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    justify-items: stretch;
    text-align: left;
  }

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

  .footer p {
    text-align: right;
  }
}