* { box-sizing: border-box; }

body {
  margin: 0 auto;
  max-width: 1100px;
  padding: 24px 16px;
  font-family: system-ui, "Segoe UI", "Noto Sans Thai", sans-serif;
  background: #f6f7f9;
  color: #1d2129;
}

header { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
h1 { margin: 0; font-size: 1.8rem; }
.intro { color: #555; }

button {
  font: inherit;
  cursor: pointer;
  border: 1px solid #d0d4da;
  background: #fff;
  border-radius: 999px;
  padding: 8px 16px;
}
button:hover { border-color: #888; }
#lang { color: #999; }
#lang .on { color: #1d2129; font-weight: 700; }

#tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0; }
#tabs button.active { background: #1d2129; color: #fff; border-color: #1d2129; }

#filters { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.filter { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
.flabel { font-size: 0.85rem; color: #555; min-width: 110px; }
.filter input[type=range] { flex: 1; max-width: 320px; }
.chip { padding: 4px 12px; font-size: 0.85rem; }
.chip.on { background: #1d2129; color: #fff; border-color: #1d2129; }
.chip.reset { align-self: flex-start; color: #ee4d2d; border-color: #ee4d2d; }
.stores { margin-top: 6px; font-size: 0.85rem; }
.store { display: flex; justify-content: space-between; color: #555; padding: 1px 0; }
.store.best { color: #1e7a3a; font-weight: 600; }
.spec { color: #555; font-size: 0.8rem; }
.none { color: #777; }

#grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }

.card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}
.card img { width: 100%; height: 160px; object-fit: contain; }
.card .icon { font-size: 2.5rem; }
.card h2 { font-size: 1.1rem; margin: 8px 0 4px; }
.card p { color: #444; flex: 1; }

.ref { color: #888; font-size: 0.75rem; margin-top: 4px; }
.price {align-self: flex-start; font-weight: 600; padding: 2px 10px; border-radius: 999px; margin-top: 8px; background: #e3f6e8; color: #1e7a3a; }

.buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.buttons a { text-decoration: none; padding: 8px 14px; border-radius: 8px; font-size: 0.9rem; }
.buy { background: #ee4d2d; color: #fff; }
.buy:hover { background: #d63c1e; }

footer { margin-top: 40px; font-size: 0.85rem; color: #777; }