:root {
  --bg: #f4fbfb;
  --bg-soft: #eaf7f7;
  --card: #ffffff;
  --text: #102033;
  --muted: #617080;
  --accent: #1da6a8;
  --accent-dark: #0f7d80;
  --border: #d8eeee;
  --shadow: 0 18px 50px rgba(16, 32, 51, 0.08);
}

body.dark {
  --bg: #081417;
  --bg-soft: #102226;
  --card: #102226;
  --text: #f2fbfb;
  --muted: #a8bec2;
  --accent: #42d7d4;
  --accent-dark: #68f0ed;
  --border: #244247;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.25);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(29, 166, 168, 0.16), transparent 34%),
    linear-gradient(135deg, var(--bg), var(--bg-soft));
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-wrap {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 24px 0;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.theme-toggle {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  cursor: pointer;
  font-weight: 700;
  box-shadow: var(--shadow);
}

.hero {
  margin: 28px 0;
  padding: 42px;
  background: rgba(255,255,255,0.78);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.eyebrow,
.category-label {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 16px;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 0.96;
  letter-spacing: -0.06em;
}

h2 {
  margin-top: 48px;
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

h3 {
  margin-top: 0;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

p {
  color: var(--muted);
}

.hero p {
  max-width: 760px;
  font-size: 18px;
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 800;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
}

.button.primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.grid {
  display: grid;
  gap: 18px;
}

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

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

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 5px 10px;
  color: var(--muted);
  font-size: 12px;
  background: rgba(255,255,255,0.4);
}

.section {
  margin: 46px 0;
}

.footer {
  margin-top: 72px;
  padding: 36px 0;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.proof-note {
  padding: 18px 20px;
  border-left: 4px solid var(--accent);
  background: var(--card);
  border-radius: 16px;
  border: 1px solid var(--border);
}

@media (max-width: 800px) {
  .grid.three,
  .grid.two {
    grid-template-columns: 1fr;
  }

  .hero {
    padding: 28px;
  }

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