:root {
  --ink: #1a1a2e;
  --muted: #6b7280;
  --line: #e5e7eb;
  --primary: #1a237e;
  --primary-light: #3949ab;
  --accent: #f9a825;
  --bg: #f5f6fa;
  --card: #ffffff;
}

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

html {
  scroll-behavior: smooth;
}

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

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

a:hover {
  text-decoration: underline;
}

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  padding: 4rem 1.5rem 5rem;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 0 auto;
  max-width: 36rem;
  font-size: 1.1rem;
  opacity: 0.92;
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section {
  padding: 3.5rem 0;
}

.section h2 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
}

.grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .grid-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--card);
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(26, 35, 126, 0.06);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  font-weight: 700;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.cta {
  text-align: center;
  padding: 3rem 1.25rem 4rem;
}

.cta-box {
  background: var(--card);
  border-radius: 1.25rem;
  padding: 2rem 1.5rem;
  border: 1px solid var(--line);
  max-width: 520px;
  margin: 0 auto;
}

.store-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 1.25rem;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.1rem;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 0.9rem;
  border: 2px solid var(--line);
  color: var(--muted);
  cursor: default;
}

.store-btn strong {
  color: var(--ink);
}

footer {
  padding: 2rem 1.25rem;
  text-align: center;
  font-size: 0.875rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

footer nav {
  margin-bottom: 0.75rem;
}

footer nav a {
  margin: 0 0.65rem;
  font-weight: 600;
}

.doc {
  padding: 2.5rem 0 4rem;
}

.doc h1 {
  font-size: 1.75rem;
  margin: 0 0 0.5rem;
  color: var(--primary);
}

.doc .meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

.doc h2 {
  font-size: 1.15rem;
  margin: 2rem 0 0.75rem;
  color: var(--primary);
}

.doc p,
.doc li {
  color: #374151;
  font-size: 0.95rem;
}

.doc ul {
  padding-left: 1.25rem;
}

.doc .back {
  display: inline-block;
  margin-bottom: 1.5rem;
  font-weight: 600;
}