:root {
  --bg: #fafaf7;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #5b6470;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --line: #e3e5e8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --card: #1e2125;
    --text: #e8eaed;
    --muted: #a0a8b3;
    --accent: #4c8dff;
    --accent-text: #0b0d10;
    --line: #2f343a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Hiragino Sans", "Noto Sans JP", "Yu Gothic UI", sans-serif;
  font-size: 17px;
  line-height: 1.8;
}
main { max-width: 640px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 1.6rem; line-height: 1.45; margin: 12px 0; }
h2 { font-size: 1.2rem; margin: 0 0 12px; }
section { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px 18px; margin-top: 20px; }
.hero { padding: 16px 0 8px; }
.badge { display: inline-block; margin: 0; padding: 2px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); font-size: .8rem; }
.sub { color: var(--muted); }
ul { padding-left: 1.2em; margin: 0; }
.pains li { margin-bottom: 8px; }
.points li { margin-bottom: 4px; }
.mock { margin: 16px 0 4px; border: 1px solid var(--line); border-radius: 10px; padding: 14px; background: var(--bg); }
.mock figcaption { font-size: .85rem; color: var(--muted); margin-bottom: 8px; }
.mock dl, .offer dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 14px; margin: 0; }
.mock dt, .offer dt { color: var(--muted); }
.mock dd, .offer dd { margin: 0; overflow-wrap: anywhere; }
.mock-btn { display: inline-block; margin-top: 12px; padding: 6px 12px; border-radius: 8px; background: var(--accent); color: var(--accent-text); font-size: .9rem; }
.cta { display: block; text-align: center; margin: 16px 0 4px; padding: 14px 16px; border-radius: 10px; background: var(--accent); color: var(--accent-text); font-weight: bold; text-decoration: none; }
.cta.disabled { opacity: .5; pointer-events: none; }
.question { margin-top: 16px; padding-top: 12px; border-top: 1px dashed var(--line); }
.small { font-size: .85rem; color: var(--muted); }
a { color: var(--accent); }
footer { text-align: center; font-size: .85rem; color: var(--muted); padding: 0 16px 32px; }
.legal h1 { font-size: 1.4rem; }
.legal h2 { margin-top: 28px; }