@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;600;700&display=swap');

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Noto Sans JP', sans-serif;
  color: #1f2937;
  background: radial-gradient(circle at top right, #e0f2fe 0%, #f8fafc 45%, #eef2ff 100%);
  min-height: 100vh;
}

.hero {
  background: linear-gradient(120deg, #0f172a 0%, #1e3a8a 55%, #1d4ed8 100%);
  color: #fff;
  padding: 56px 20px;
}

.hero-inner {
  max-width: 960px;
  margin: 0 auto;
}

.label {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
  margin-bottom: 10px;
  font-size: 12px;
}

.hero h1 {
  margin: 0;
  font-size: 42px;
}

.lead {
  margin-top: 12px;
  max-width: 700px;
  color: #dbeafe;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 28px 20px 44px;
}

h2 {
  margin: 0 0 14px;
  color: #0f172a;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.app-card {
  background: #ffffff;
  border: 1px solid #dbeafe;
  border-radius: 16px;
  padding: 18px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
}

.app-card h3 {
  margin: 4px 0 8px;
}

.app-icon {
  font-size: 28px;
}

.app-card p {
  margin: 0 0 14px;
  line-height: 1.7;
  color: #334155;
}

.card-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.card-links a {
  text-decoration: none;
  background: #1d4ed8;
  color: #fff;
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 14px;
}

.card-links a:hover {
  background: #1e40af;
}

.placeholder {
  border-style: dashed;
}

.howto {
  margin-top: 26px;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 18px;
}

.howto ol {
  margin: 0;
  padding-left: 20px;
  line-height: 1.9;
}

footer {
  border-top: 1px solid #e2e8f0;
  text-align: center;
  padding: 20px;
  color: #64748b;
}

footer a {
  color: #1d4ed8;
}

.copy {
  margin-top: 8px;
  font-size: 13px;
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 32px;
  }

  .lead {
    font-size: 14px;
  }
}