:root {
  --bg: #f3f8fd;
  --bg-alt: #ffffff;
  --ink: #1b2740;
  --ink-dim: #5c6b85;
  --accent: #d99a3a;
  --accent-ink: #6b4a12;
  --accent-dim: #e8c98a;
  --border: #dbe6f3;
  --max-width: 720px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}

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

header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--ink);
}

.brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-ink);
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px 96px;
}

.hero {
  text-align: center;
  padding: 24px 0 24px;
}

.hero .logo {
  display: block;
  width: 132px;
  height: 132px;
  margin: 0 auto 28px;
  border-radius: 28px;
  box-shadow: 0 10px 28px rgba(27, 39, 64, 0.14);
}

.hero h1 {
  font-size: clamp(1.7rem, 6vw, 2.8rem);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.hero p.lead {
  color: var(--ink-dim);
  font-size: 1.15rem;
  max-width: 520px;
  margin: 0 auto 32px;
}

.cta {
  display: inline-block;
  background: var(--accent);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
  padding: 12px 28px;
  border-radius: 8px;
}

.cta.disabled {
  opacity: 0.6;
  pointer-events: none;
}

section {
  margin-top: 56px;
}

h2 {
  font-size: 1.4rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
  margin-bottom: 20px;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  list-style: none;
  padding: 0;
}

.features li {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  color: var(--ink-dim);
}

.features li strong {
  display: block;
  color: var(--ink);
  margin-bottom: 6px;
}

footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 24px;
  color: var(--ink-dim);
  font-size: 0.85rem;
}

@media (max-width: 420px) {
  nav {
    justify-content: center;
    text-align: center;
  }

  .nav-links {
    justify-content: center;
    gap: 10px 16px;
  }

  .hero .logo {
    width: 108px;
    height: 108px;
  }
}