:root { color-scheme: light; }
html[data-theme="light"] {
  --bg: #f1f5f9; --surface: #ffffff; --surface-2: #f8fafc; --text: #0f172a;
  --muted: #64748b; --border: #e2e8f0; --primary: #2563eb; --primary-2: #1d4ed8;
  --accent: #f59e0b; --ok: #15803d; --bad: #dc2626; --warn-bg: #fffbeb;
}
html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f172a; --surface: #1e293b; --surface-2: #162032; --text: #e2e8f0;
  --muted: #94a3b8; --border: #334155; --primary: #60a5fa; --primary-2: #3b82f6;
  --accent: #fbbf24; --ok: #4ade80; --bad: #f87171; --warn-bg: #422006;
}
* { box-sizing: border-box; }
body { font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; margin: 0; background: var(--bg); color: var(--text); padding-bottom: 72px; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
.topbar { background: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; }
.topbar-inner { max-width: 1100px; margin: 0 auto; padding: 12px 16px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.logo { font-size: 22px; font-weight: 800; color: var(--text); }
.logo span { background: var(--accent); color: #111827; font-size: 12px; padding: 2px 7px; border-radius: 999px; vertical-align: middle; }
.top-search { display: flex; flex: 1 1 260px; }
.top-search input { flex: 1; min-width: 0; padding: 9px 12px; border: 1px solid var(--border); border-radius: 10px 0 0 10px; background: var(--surface-2); color: var(--text); }
.top-search button, .btn { border: 0; background: var(--primary); color: #fff; padding: 9px 16px; border-radius: 10px; font-weight: 600; }
.top-search button { border-radius: 0 10px 10px 0; }
.top-nav { display: flex; gap: 14px; flex-wrap: wrap; }
.top-nav a { color: var(--text); font-weight: 600; }
.top-actions { display: flex; gap: 8px; align-items: center; margin-left: auto; flex-wrap: wrap; }
.wallet-chip { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); padding: 7px 10px; border-radius: 999px; font-size: 13px; }
.cart-link { color: var(--text); font-weight: 700; }
.cart-link span, .bottom-nav b { display: inline-block; background: var(--accent); color: #111827; min-width: 22px; text-align: center; border-radius: 999px; font-size: 12px; padding: 1px 5px; }
#theme-toggle { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); padding: 8px 12px; border-radius: 999px; }
.test-banner { max-width: 1100px; margin: 0 auto; padding: 0 16px 10px; font-size: 13px; color: var(--muted); }
main { max-width: 1100px; margin: 0 auto; padding: 20px 16px 32px; }
.hero { background: linear-gradient(120deg, #2563eb, #7c3aed); color: #fff; border-radius: 18px; padding: 28px; }
.hero h1 { margin: 0 0 8px; font-size: 30px; }
.hero p { margin: 0 0 16px; opacity: .92; }
.hero a { background: #fff; color: #1d4ed8; padding: 10px 18px; border-radius: 10px; font-weight: 700; display: inline-block; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin: 18px 0; }
.chips a, .chip-btn { border: 1px solid var(--border); background: var(--surface); color: var(--text); padding: 7px 12px; border-radius: 999px; font-size: 14px; }
.chips a.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.chip-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
h2 { font-size: 22px; margin: 26px 0 12px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px; display: flex; flex-direction: column; gap: 6px; }
.card h3 { margin: 0; font-size: 16px; }
.card h3 a { color: var(--text); }
.muted { color: var(--muted); font-size: 13px; }
.desc { font-size: 14px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.price { font-size: 19px; font-weight: 800; }
.price s { font-size: 13px; color: var(--muted); font-weight: 400; margin-left: 6px; }
.badge { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--border); }
.badge.ok { color: var(--ok); } .badge.bad { color: var(--bad); } .badge.verified { background: #dcfce7; color: #166534; }
html[data-theme="dark"] .badge.verified { background: #14532d; color: #bbf7d0; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin-top: auto; }
.btn-secondary { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.btn-danger { background: var(--bad); }
.btn-small { padding: 7px 12px; font-size: 14px; }
.filters { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.filters label { font-size: 13px; color: var(--muted); display: grid; gap: 4px; }
.filters input, .filters select, .field input, .field select, .field textarea { width: 100%; padding: 9px 10px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-2); color: var(--text); }
.filters .check { display: flex; align-items: center; gap: 6px; }
.filters .check input { width: auto; }
.loading, .empty, .error-box, .notice { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.error-box { border-color: var(--bad); }
.error-box p, .notice p { margin: 6px 0; }
.notice { background: var(--warn-bg); }
.detail { display: grid; grid-template-columns: 2fr 1fr; gap: 16px; align-items: start; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 18px; }
.panel h2, .panel h3 { margin-top: 0; }
.qty { display: flex; align-items: center; gap: 8px; }
.qty button { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); font-size: 18px; }
.qty input { width: 64px; text-align: center; padding: 8px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface-2); color: var(--text); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 8px; border-bottom: 1px solid var(--border); vertical-align: top; }
.field { display: grid; gap: 5px; margin-bottom: 12px; }
.field label { font-weight: 600; font-size: 14px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.chat-box { border: 1px solid var(--border); border-radius: 12px; padding: 12px; background: var(--surface-2); }
.chat-msgs { max-height: 260px; overflow: auto; display: grid; gap: 8px; margin-bottom: 10px; }
.msg { padding: 8px 11px; border-radius: 12px; font-size: 14px; max-width: 85%; background: var(--surface); border: 1px solid var(--border); }
.msg.me { margin-left: auto; background: #dbeafe; border-color: #bfdbfe; color: #1e3a8a; }
html[data-theme="dark"] .msg.me { background: #1e3a8a; color: #dbeafe; }
.chat-form { display: flex; gap: 8px; }
.chat-form input { flex: 1; padding: 9px 10px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--text); }
.footer { border-top: 1px solid var(--border); background: var(--surface); }
.footer-inner { max-width: 1100px; margin: 0 auto; padding: 22px 16px; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 18px; }
.footer-inner nav { display: grid; gap: 8px; align-content: start; }
.footer-note { text-align: center; color: var(--muted); font-size: 13px; padding: 0 16px 18px; margin: 0; }
.bottom-nav { display: none; position: fixed; left: 0; right: 0; bottom: 0; z-index: 20; background: var(--surface); border-top: 1px solid var(--border); overflow-x: auto; scrollbar-width: none; }
.bottom-nav::-webkit-scrollbar { display: none; }
.bottom-nav a { flex: 0 0 auto; min-width: 62px; text-align: center; color: var(--muted); font-size: 20px; padding: 7px 4px 8px; display: grid; justify-items: center; gap: 1px; position: relative; }
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.section-head a { font-size: 14px; font-weight: 700; white-space: nowrap; }
.bottom-nav a span { font-size: 11px; }
.bottom-nav a.active { color: var(--primary); }
.bottom-nav b { position: absolute; top: 3px; right: 18%; }
@media (max-width: 760px) {
  body { padding-bottom: 76px; }
  .top-nav { display: none; }
  .top-search { order: 3; flex-basis: 100%; }
  .bottom-nav { display: flex; }
  .detail, .form-grid, .footer-inner { grid-template-columns: 1fr; }
  .hero h1 { font-size: 24px; }
  .top-actions { margin-left: 0; }
}