:root {
  color-scheme: light;
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-soft: #f8f9fc;
  --text: #101828;
  --muted: #475467;
  --primary: #3b5ccc;
  --primary-hover: #2f4ead;
  --ring: rgba(59, 92, 204, 0.18);
  --border: #e4e7ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, #eaf0ff 0%, transparent 45%),
    radial-gradient(circle at 90% 90%, #eef2ff 0%, transparent 40%),
    var(--bg);
}

.lp {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  width: min(100%, 920px);
  border-radius: 24px;
  padding: 56px;
  background: linear-gradient(160deg, var(--surface) 0%, var(--surface-soft) 100%);
  border: 1px solid var(--border);
  box-shadow:
    0 12px 40px rgba(16, 24, 40, 0.08),
    0 1px 0 rgba(255, 255, 255, 0.7) inset;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: #eef2ff;
  border: 1px solid #d9e2ff;
  color: #344794;
  font-size: 0.82rem;
  font-weight: 600;
}

h1 {
  margin: 18px 0 16px;
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  max-width: 62ch;
}

.actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.cta {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.cta:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.cta:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px var(--ring);
}

.sub-link {
  color: #42526f;
  text-decoration: none;
  font-weight: 500;
}

.sub-link:hover {
  text-decoration: underline;
}

.features {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.feature {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}

.feature h2 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.feature p {
  font-size: 0.93rem;
  line-height: 1.65;
}

@media (max-width: 860px) {
  .card {
    padding: 34px 24px;
    border-radius: 18px;
  }

  .features {
    grid-template-columns: 1fr;
  }
}