:root {
  color: #001e43;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  background: #f7f9fc;
}

* {
  box-sizing: border-box;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(
      circle at 12% 8%,
      rgba(30, 123, 255, 0.1),
      transparent 32rem
    ),
    #f7f9fc;
}

.home-page {
  width: min(100% - 48px, 960px);
  margin: 0 auto;
  padding: 96px 0 56px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(180px, 300px) minmax(0, 1fr);
  gap: clamp(44px, 8vw, 88px);
  align-items: center;
}

.app-icon {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 24%;
  box-shadow: 0 24px 60px rgba(0, 30, 67, 0.16);
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 18px;
  color: #185cd0;
  font-size: clamp(36px, 6vw, 58px);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.32;
}

.lead {
  margin-bottom: 16px;
  color: #405a73;
  font-size: clamp(17px, 2.3vw, 20px);
  font-weight: 600;
  line-height: 1.7;
}

.tagline {
  margin-bottom: 16px;
  font-size: clamp(25px, 4vw, 36px);
  font-weight: 650;
  letter-spacing: -0.025em;
  line-height: 1.45;
}

.description {
  max-width: 38rem;
  margin-bottom: 0;
  color: #60758a;
  font-size: 15px;
  line-height: 1.9;
}

.google-sign-in,
.information {
  margin-top: 80px;
  padding-top: 28px;
  border-top: 1px solid #dce6ef;
}

.google-sign-in h2,
.information h2 {
  margin-bottom: 18px;
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.google-sign-in p {
  max-width: 48rem;
  margin-bottom: 0;
  color: #60758a;
  font-size: 15px;
  line-height: 1.9;
}

.information nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}

.information a {
  color: #0b63ce;
  font-size: 15px;
  font-weight: 600;
  text-underline-offset: 4px;
}

footer {
  width: min(100% - 48px, 960px);
  margin: 0 auto;
  padding: 0 0 36px;
  color: #70869b;
  font-size: 13px;
}

footer p {
  margin: 0;
}

@media (max-width: 720px) {
  .home-page {
    width: min(100% - 40px, 520px);
    padding-top: 56px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .app-icon {
    width: min(52vw, 220px);
  }

  .google-sign-in,
  .information {
    margin-top: 56px;
  }

  .information nav {
    display: grid;
    gap: 16px;
  }

  footer {
    width: min(100% - 40px, 520px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}