:root {
  --ink: #1f2933;
  --muted: #667085;
  --line: #e5e7eb;
  --soft: #f7f8fa;
  --brand: #0f766e;
  --brand-dark: #115e59;
  --accent: #f59e0b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Tahoma, "Noto Sans Thai", Arial, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.72;
}
a { color: var(--brand-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
.sitebar {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.brand { font-size: 22px; font-weight: 800; color: var(--ink); }
.sitebar nav { display: flex; gap: 18px; font-weight: 700; }
.wrap { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.product-page {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
  padding: 28px 0 50px;
}
.crumb { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 14px; }
.article { min-width: 0; }
.notice {
  border-left: 4px solid var(--accent);
  background: #fffbeb;
  padding: 14px 16px;
  border-radius: 8px;
  margin-bottom: 22px;
}
.hero {
  display: grid;
  grid-template-columns: minmax(260px, 42%) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}
.hero-media {
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}
.hero-media a {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}
.hero-media img { width: 100%; height: 100%; object-fit: contain; }
.kicker {
  margin: 0 0 8px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.28; margin: 0 0 14px; }
h1 { font-size: clamp(28px, 4vw, 44px); }
h2 { font-size: 24px; }
h3 { font-size: 18px; margin-top: 18px; }
.lead { font-size: 18px; color: #475467; margin: 0 0 18px; }
.pricebox {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: baseline;
  padding: 14px 0 18px;
}
.pricebox strong { font-size: 32px; color: var(--brand-dark); }
.old { color: var(--muted); text-decoration: line-through; }
.discount {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 3px 10px;
  border-radius: 999px;
  background: #fee2e2;
  color: #b42318;
  font-weight: 800;
}
.cta, .mini-cta {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
}
.cta:hover, .mini-cta:hover { background: var(--brand-dark); color: #fff; text-decoration: none; }
.subcta { display: inline-flex; margin-left: 12px; font-weight: 700; }
.card, .side-card, .final-cta {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 24px;
  background: #fff;
}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.checklist { padding-left: 20px; margin: 0; }
.checklist li { margin: 8px 0; }
.specs { margin: 0; }
.specs div { display: grid; grid-template-columns: 150px 1fr; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.specs div:last-child { border-bottom: 0; }
.specs dt { color: var(--muted); font-weight: 700; }
.specs dd { margin: 0; }
details { border-top: 1px solid var(--line); padding: 14px 0; }
details:first-of-type { border-top: 0; }
summary { cursor: pointer; font-weight: 800; }
.final-cta {
  text-align: center;
  background: #f0fdfa;
  border-color: #99f6e4;
}
.sidebar { position: sticky; top: 18px; align-self: start; }
.side-card { margin-top: 0; }
.side-card ul { padding-left: 18px; margin: 0; }
.side-card li { margin: 10px 0; }
.index-page { padding: 34px 0 54px; }
.index-hero { max-width: 820px; margin-bottom: 26px; }
.index-hero h1 { margin-bottom: 12px; }
.index-hero p:last-child { color: #475467; font-size: 18px; }
.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 26px;
}
.category-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-weight: 800;
}
.category-nav span {
  display: inline-grid;
  place-items: center;
  min-width: 24px;
  height: 24px;
  border-radius: 999px;
  background: #ecfdf5;
  color: var(--brand-dark);
  font-size: 12px;
}
.category-section {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}
.category-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 18px;
  margin-bottom: 16px;
}
.category-heading h2 { margin-bottom: 4px; }
.category-heading p { margin: 0; color: var(--muted); }
.category-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 13px;
  border-radius: 8px;
  background: #eefdf8;
  font-weight: 800;
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.product-card {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  background: #fff;
}
.thumb {
  aspect-ratio: 1 / 1;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--soft);
}
.thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }
.product-card h2 { font-size: 17px; margin-bottom: 8px; }
.card-meta { margin: 0 0 10px; color: var(--muted); }
.card-meta strong { color: var(--brand-dark); }
.mini-cta { min-height: 36px; padding: 0 12px; font-size: 14px; }
.footer {
  border-top: 1px solid var(--line);
  padding: 20px 28px;
  color: var(--muted);
  text-align: center;
}
@media (max-width: 940px) {
  .product-page { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .hero, .grid-2, .product-grid { grid-template-columns: 1fr; }
  .category-heading { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 560px) {
  .sitebar { align-items: flex-start; flex-direction: column; gap: 8px; padding: 16px; }
  .hero, .card, .side-card, .final-cta { padding: 18px; }
  .product-card { grid-template-columns: 92px 1fr; }
  .specs div { grid-template-columns: 1fr; gap: 3px; }
  .subcta { margin-left: 0; margin-top: 10px; }
}