:root {
  --navy: #0b1f3a;
  --blue: #4da3ff;
  --ink: #172031;
  --muted: #5f6a7a;
  --border: #dce3eb;
  --surface: #ffffff;
  --surface-soft: #f7f9fb;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #fbfcfd;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

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

main {
  flex: 1;
}

/* Header */

.site-header {
  padding: 20px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

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

.wordmark {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--navy);
}

/* Hero */

.hero {
  padding: clamp(60px, 10vw, 120px) clamp(20px, 5vw, 72px) clamp(40px, 6vw, 80px);
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin: 0 0 20px;
  line-height: 1.1;
}

.tagline {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--muted);
  margin: 0;
  max-width: 480px;
  margin-inline: auto;
}

/* Product */

.product {
  padding: 0 clamp(20px, 5vw, 72px) clamp(60px, 10vw, 120px);
  display: flex;
  justify-content: center;
}

.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: clamp(28px, 4vw, 48px);
  max-width: 480px;
  width: 100%;
}

.product-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
}

.product-card h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.product-card p {
  color: var(--muted);
  margin: 0 0 24px;
  font-size: 0.975rem;
}

.button {
  display: inline-block;
  background: var(--navy);
  color: #fff;
  padding: 11px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.15s;
}

.button:hover {
  background: #0d2647;
}

/* Footer */

.footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 28px clamp(20px, 5vw, 72px);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--muted);
}

.footer-links a:hover {
  color: var(--ink);
}

.copyright {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0;
  margin-left: auto;
}

@media (max-width: 600px) {
  .copyright {
    margin-left: 0;
    width: 100%;
  }
}