:root {
  --bg-1: #f5fbf7;
  --bg-2: #ecf7ef;
  --surface: #ffffffde;
  --text: #20322a;
  --muted: #546a61;
  --line: #d3e4d9;
  --primary: #2e8f5b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 5%, #d9f0df 0%, transparent 45%),
    radial-gradient(circle at 90% 15%, #e6f4ea 0%, transparent 40%),
    linear-gradient(160deg, var(--bg-1) 0%, var(--bg-2) 100%);
}

.page {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: 0 10px 24px rgba(23, 54, 38, 0.08);
  padding: 26px 22px;
}

.back-link {
  display: inline-block;
  color: var(--primary);
  text-decoration: none;
  font-weight: 700;
  margin-bottom: 12px;
}

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

h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
}

time {
  display: inline-block;
  color: var(--muted);
  margin-top: 8px;
  font-size: 0.9rem;
}

.section {
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #ffffffc7;
  padding: 14px 14px;
}

h2 {
  margin: 0 0 8px;
  font-size: 1.02rem;
}

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

.footer {
  margin-top: 14px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}