:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --ink: #171a22;
  --muted: #6b7280;
  --line: #e5e8f0;
  --brand: #3b6ef6;
  --brand-ink: #1e46b8;
  --ok: #0f9d58;
  --warn: #c77700;
  --bad: #d3382f;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 25, 45, .06), 0 8px 24px rgba(20, 25, 45, .06);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Sarabun", "Noto Sans Thai", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
code { background: #eef0f6; padding: 1px 6px; border-radius: 6px; font-size: .92em; }
hr { border: 0; border-top: 1px solid var(--line); margin: 28px 0; }

/* ── header / footer ─────────────────────────────────────────────── */
header.site {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 14px 24px; background: var(--panel); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 800; font-size: 18px; display: flex; align-items: center; gap: 8px; }
header.site nav { display: flex; gap: 16px; margin-left: auto; font-size: 14px; color: var(--muted); }
header.site nav a:hover { color: var(--brand); }
.search { display: flex; gap: 8px; flex: 1 1 320px; max-width: 520px; }
.search input {
  flex: 1; padding: 10px 14px; border: 1px solid var(--line); border-radius: 999px;
  background: #fbfcfe; font: inherit; font-size: 14px;
}
.search input:focus { outline: 2px solid var(--brand); outline-offset: 1px; }
.search button {
  padding: 10px 18px; border: 0; border-radius: 999px; background: var(--brand);
  color: #fff; font: inherit; font-weight: 600; cursor: pointer;
}
footer.site {
  margin-top: 64px; padding: 28px 24px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 13px; text-align: center; background: var(--panel);
}

main { max-width: 1120px; margin: 0 auto; padding: 28px 24px 8px; }
main.wide { max-width: 820px; }
section { margin-bottom: 44px; }
h1 { font-size: 30px; line-height: 1.3; margin: 0 0 12px; }
h2 { font-size: 21px; margin: 0 0 14px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.section-head a { font-size: 14px; color: var(--brand); }
.empty { color: var(--muted); padding: 32px; text-align: center; background: var(--panel); border-radius: var(--radius); }

/* ── hero ────────────────────────────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, #eef3ff, #f7f2ff);
  border: 1px solid var(--line); border-radius: 20px; padding: 40px 32px; margin-bottom: 44px;
}
.hero h1 { font-size: clamp(26px, 4vw, 38px); max-width: 22ch; }
.hero p { color: #40465a; max-width: 60ch; margin: 0 0 22px; }
.stats { display: flex; flex-wrap: wrap; gap: 28px; }
.stats div { display: flex; flex-direction: column; }
.stats b { font-size: 26px; color: var(--brand-ink); }
.stats span { font-size: 13px; color: var(--muted); }

/* ── categories ──────────────────────────────────────────────────── */
.cats { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.cat {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; display: flex; flex-direction: column; gap: 4px; transition: .15s;
}
.cat:hover { border-color: var(--brand); transform: translateY(-2px); box-shadow: var(--shadow); }
.cat-emoji { font-size: 26px; }
.cat small { color: var(--muted); font-size: 12.5px; }
.cats.big .cat { min-height: 150px; }

/* ── product grid ────────────────────────────────────────────────── */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column; transition: .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #c9d5f5; }
.thumb {
  height: 108px; display: grid; place-items: center; font-size: 44px;
  background: color-mix(in srgb, var(--c) 14%, #fff);
  border-bottom: 1px solid var(--line);
}
.thumb.small { height: 76px; font-size: 34px; border-radius: 12px; border: 1px solid var(--line); margin-bottom: 10px; }
.card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card-body h3 { font-size: 16px; margin: 0; line-height: 1.45; }
.card-body p { margin: 0; font-size: 13.5px; color: var(--muted); flex: 1; }
.card-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 8px; }
.price { color: var(--brand-ink); font-size: 17px; }
.score { font-size: 12px; color: var(--ok); background: #e9f7ef; padding: 2px 8px; border-radius: 999px; }
.chip {
  display: inline-block; font-size: 12px; color: var(--brand-ink); background: #eef3ff;
  padding: 2px 10px; border-radius: 999px; width: fit-content;
}
.chip.ok { color: #0b6b3d; background: #e4f6ec; }
.tag { font-size: 12.5px; color: var(--muted); background: #f0f2f7; padding: 2px 8px; border-radius: 6px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }

/* ── product page ────────────────────────────────────────────────── */
.product { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; overflow: hidden; }
.p-head {
  display: flex; gap: 22px; padding: 30px; align-items: flex-start;
  background: color-mix(in srgb, var(--c) 9%, #fff); border-bottom: 1px solid var(--line);
}
.p-emoji { font-size: 56px; line-height: 1; }
.p-head h1 { margin: 8px 0 6px; }
.lead { color: #4b5163; margin: 0; }
.p-layout { display: grid; grid-template-columns: 1fr 300px; gap: 28px; padding: 28px 30px 34px; }
.p-main h2 { font-size: 18px; }
.locked {
  margin-top: 24px; padding: 20px; border: 1px dashed #c3cbe0; border-radius: var(--radius);
  background: #fafbff;
}
.locked h3 { margin: 0 0 8px; font-size: 16px; }
.locked ul { margin: 0; padding-left: 20px; color: var(--muted); font-size: 14px; }
.p-buy {
  align-self: start; position: sticky; top: 86px;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; background: #fbfcfe;
}
.price-big { font-size: 32px; font-weight: 800; color: var(--brand-ink); }
.p-buy .meta { display: flex; justify-content: space-between; font-size: 13.5px; padding: 7px 0; border-top: 1px solid var(--line); }
.p-buy .meta span { color: var(--muted); }
.note { margin-top: 14px; font-size: 12.5px; color: var(--muted); }
.prose { font-size: 15.5px; }
.prose h2 { font-size: 19px; margin: 26px 0 8px; }
.prose h3 { font-size: 16.5px; margin: 20px 0 6px; }
.prose ul { padding-left: 22px; }
.prose li { margin: 4px 0; }

/* ── buttons / forms ─────────────────────────────────────────────── */
.btn {
  display: block; width: 100%; text-align: center; padding: 12px 18px; margin-top: 12px;
  border: 1px solid var(--line); border-radius: 10px; background: #fff; font-weight: 600;
  cursor: pointer; font: inherit; font-weight: 600;
}
.btn:hover { border-color: var(--brand); color: var(--brand-ink); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-ink); color: #fff; }
.btn.inline { display: inline-block; width: auto; margin: 0; padding: 7px 14px; font-size: 13.5px; }
.btn.danger { color: var(--bad); }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.panel.narrow { max-width: 460px; margin: 0 auto; }
label { display: block; margin-bottom: 14px; font-size: 14px; font-weight: 600; }
label input, label select, label textarea {
  display: block; width: 100%; margin-top: 6px; padding: 10px 12px; font: inherit;
  border: 1px solid var(--line); border-radius: 10px; background: #fbfcfe; font-weight: 400;
}
label input:focus, label textarea:focus { outline: 2px solid var(--brand); outline-offset: 1px; }

.checkout { display: grid; grid-template-columns: 1fr 300px; gap: 22px; align-items: start; }
.summary .total { display: flex; justify-content: space-between; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 18px; }
.qr { display: block; margin: 8px auto 16px; border: 1px solid var(--line); border-radius: 12px; background: #fff; padding: 8px; }
.pay-meta { display: grid; gap: 6px; margin-bottom: 18px; }
.pay-meta div { display: flex; justify-content: space-between; font-size: 14px; }
.pay-meta span { color: var(--muted); }
.slip { margin-top: 8px; padding-top: 16px; border-top: 1px solid var(--line); }

.alert { padding: 12px 14px; border-radius: 10px; background: #fdecea; color: #8c231c; margin-bottom: 16px; font-size: 14px; }
.alert.ok { background: #e4f6ec; color: #0b6b3d; }
.alert.info { background: #eaf1fe; color: #1c3f8f; }
.status { display: inline-block; padding: 5px 14px; border-radius: 999px; font-size: 14px; font-weight: 600; background: #eef0f6; }
.status.ok { background: #e4f6ec; color: #0b6b3d; }
.status.warn { background: #fdf1e0; color: var(--warn); }
.status.info { background: #eaf1fe; color: #1c3f8f; }
.status.bad { background: #fdecea; color: #8c231c; }

/* ── reader ──────────────────────────────────────────────────────── */
.reader { background: var(--panel); border: 1px solid var(--line); border-radius: 20px; padding: 32px 36px 44px; }
.reader-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding-bottom: 16px; margin-bottom: 18px; border-bottom: 1px solid var(--line); font-size: 14px;
}
.reader-bar .btn { width: auto; margin: 0; padding: 8px 16px; }

/* ── admin ───────────────────────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: .04em; }
.table-wrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); }
.tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.tabs a { padding: 8px 16px; border-radius: 999px; background: var(--panel); border: 1px solid var(--line); font-size: 14px; }
.tabs a.on { background: var(--brand); color: #fff; border-color: var(--brand); }
.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 24px; }
.kpi { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.kpi b { display: block; font-size: 24px; color: var(--brand-ink); }
.kpi span { font-size: 13px; color: var(--muted); }
.row-actions { display: flex; gap: 6px; flex-wrap: wrap; }
.row-actions form { display: inline; }
textarea { min-height: 120px; resize: vertical; }

@media (max-width: 860px) {
  .p-layout, .checkout { grid-template-columns: 1fr; }
  .p-buy { position: static; }
  .p-head { flex-direction: column; gap: 12px; padding: 22px; }
  main { padding: 20px 16px 8px; }
  .hero { padding: 26px 20px; }
  .reader { padding: 22px; }
}