:root {
  --cream: #fff8f1;
  --card: #ffffff;
  --ink: #352b28;
  --muted: #6f625e;
  --line: #eadfd8;
  --brand: #c43d2f;
  --brand-soft: #fff0e7;
  --sky: #eaf5f8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--cream); color: var(--ink);
  font-family: "IBM Plex Sans Thai", system-ui, sans-serif; line-height: 1.75;
}
a { color: var(--brand); }
img { display: block; max-width: 100%; }
.wrap { width: min(820px, calc(100% - 40px)); margin: 0 auto; }
.site-head { border-bottom: 1px solid var(--line); background: rgba(255,248,241,.96); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 68px; }
.brand { display: flex; align-items: center; gap: 9px; color: var(--ink); text-decoration: none; font-weight: 800; }
.back { text-decoration: none; font-size: .94rem; font-weight: 600; }
main { padding: 54px 0 80px; }
.breadcrumb { margin-bottom: 28px; color: var(--muted); font-size: .9rem; }
.breadcrumb a { text-decoration: none; }
.eyebrow { color: var(--brand); font-weight: 700; letter-spacing: .04em; }
h1, h2, h3 { font-family: Mali, "IBM Plex Sans Thai", sans-serif; line-height: 1.35; }
h1 { margin: 10px 0 18px; font-size: clamp(2rem, 5vw, 3rem); letter-spacing: -.02em; }
h2 { margin: 42px 0 12px; font-size: clamp(1.4rem, 3vw, 1.85rem); }
h3 { margin: 28px 0 8px; font-size: 1.12rem; }
.lede { font-size: 1.15rem; color: var(--muted); }
.meta { margin: 20px 0 0; color: var(--muted); font-size: .9rem; }
.answer {
  margin: 34px 0; padding: 24px 26px; background: var(--card);
  border: 1px solid var(--line); border-left: 5px solid var(--brand); border-radius: 0 16px 16px 0;
}
.answer strong { display: block; margin-bottom: 6px; color: var(--brand); }
.toc { margin: 30px 0; padding: 22px 26px; background: var(--brand-soft); border-radius: 16px; }
.toc strong { display: block; margin-bottom: 8px; }
.toc a { text-decoration: none; }
.steps { padding-left: 1.25rem; }
.steps li, ul li { margin-bottom: 10px; }
.example { margin: 18px 0; padding: 18px 20px; background: #3b302d; color: #fff8f1; border-radius: 14px; }
.note { margin: 24px 0; padding: 18px 20px; background: var(--sky); border: 1px solid #cfe5eb; border-radius: 14px; }
.medical-note { margin: 30px 0; padding: 20px; background: #fff1ef; border: 1px solid #efc5bf; border-radius: 14px; }
.sources { font-size: .94rem; }
.related { margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.related a { padding: 18px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; text-decoration: none; font-weight: 600; }
.cta { margin-top: 46px; padding: 30px; text-align: center; background: var(--brand); color: white; border-radius: 20px; }
.cta h2 { margin-top: 0; }
.cta a { display: inline-block; margin-top: 8px; padding: 12px 22px; border-radius: 99px; background: white; color: var(--brand); text-decoration: none; font-weight: 700; }
footer { padding: 30px 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
footer .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
@media (max-width: 620px) {
  .wrap { width: min(100% - 28px, 820px); }
  main { padding-top: 36px; }
  .related-grid { grid-template-columns: 1fr; }
  .answer, .toc, .cta { padding: 20px; }
}