:root {
  --bg-top: #f7f1e7;
  --bg-bottom: #efe4cf;
  --surface: rgba(255, 252, 246, 0.88);
  --surface-strong: rgba(255, 248, 239, 0.96);
  --ink: #241816;
  --muted: #62544d;
  --line: rgba(36, 24, 22, 0.1);
  --accent: #c94e2d;
  --accent-deep: #8d2810;
  --shadow: 0 18px 50px rgba(56, 30, 18, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: light;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Avenir Next", "Hiragino Sans", "Yu Gothic", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(201, 78, 45, 0.16), transparent 28%),
    radial-gradient(circle at bottom right, rgba(141, 40, 16, 0.12), transparent 24%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

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

.shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(255, 250, 242, 0.96), rgba(248, 236, 221, 0.86));
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(36, 24, 22, 0.08);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.brand-mark {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

h1, h2, h3 {
  margin: 0;
  line-height: 1.15;
}

h1 {
  margin-top: 18px;
  font-size: clamp(34px, 6vw, 56px);
  font-weight: 800;
  letter-spacing: -0.03em;
}

.lead {
  margin: 14px 0 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.card {
  padding: 22px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.card strong,
.meta strong {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
}

.card p,
.meta p,
.section p,
.section li {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.card p + p,
.section p + p,
.section li + li {
  margin-top: 10px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid transparent;
}

.button.primary {
  color: #fffaf6;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--line);
}

.meta {
  margin-top: 18px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--surface-strong);
}

.section-list {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.section {
  padding: 24px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.section h2 {
  margin-bottom: 14px;
  font-size: 24px;
  letter-spacing: -0.02em;
}

.section ul {
  margin: 0;
  padding-left: 20px;
}

.footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 720px) {
  .shell {
    width: min(100% - 20px, 960px);
    padding: 18px 0 32px;
  }

  .hero,
  .card,
  .section {
    border-radius: 22px;
    padding: 20px;
  }

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

  .lead {
    font-size: 16px;
  }
}