:root {
  color-scheme: light;
  --color-bg: #f7f8fb;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-muted: #5f6b7a;
  --color-border: #dce2ea;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --shadow-soft: 0 16px 40px rgba(31, 41, 55, 0.10);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
}

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

a:hover {
  text-decoration: underline;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 32px;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}

.brand {
  color: var(--color-text);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand:hover {
  text-decoration: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
}

.site-nav a {
  color: var(--color-muted);
  font-weight: 600;
}

.site-nav a[aria-current="page"],
.site-nav a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

.section {
  padding: 72px 24px;
}

.section-muted {
  background: #eef3f9;
}

.section-inner {
  width: min(960px, 100%);
  margin: 0 auto;
}

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

h1 {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  line-height: 1.05;
  margin-bottom: 20px;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.2;
  margin-bottom: 18px;
}

h3 {
  font-size: 1.05rem;
  line-height: 1.35;
  margin-bottom: 8px;
}

.eyebrow {
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  color: #ffffff;
  background: var(--color-primary);
  border-radius: 8px;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.22);
}

.button:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
}

footer {
  padding: 28px 24px;
  color: var(--color-muted);
  text-align: center;
  background: #ffffff;
  border-top: 1px solid var(--color-border);
}

footer p {
  margin: 0;
}

@media (max-width: 640px) {
  header {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 18px 20px;
  }

  .site-nav {
    flex-wrap: wrap;
    gap: 12px 16px;
  }

  .section {
    padding: 56px 20px;
  }
}