:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --ink: #1f2937;
  --muted: #4b5563;
  --bg: #f7f8fb;
  --card: #ffffff;
  --border: #e5e7eb;
  --green: #16a34a;
  --green-bg: #dcfce7;
  --green-ink: #14532d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: 1.5;
}

.wrap { max-width: 960px; margin: 0 auto; padding: 0 16px; }

.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
}
.logo { font-size: 22px; font-weight: 800; color: var(--ink); text-decoration: none; }
.logo span { color: var(--primary); }
.main-nav a {
  margin-left: 18px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}
.main-nav a:hover { color: var(--primary); }

.hero {
  text-align: center;
  padding: 48px 16px 24px;
}
.hero h1 { font-size: 32px; margin: 0 0 10px; }
.hero p { color: var(--muted); margin: 0 auto 28px; max-width: 560px; }

#priceForm {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: 720px;
  margin: 0 auto 8px;
}
#productQuery {
  flex: 1;
  min-width: 220px;
  padding: 14px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 16px;
}
.url-fields {
  max-width: 720px;
  margin: 0 auto 18px;
  display: grid;
  gap: 8px;
}
.url-fields input {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 14px;
}
.url-fields summary {
  cursor: pointer;
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 8px;
}
#priceForm button {
  padding: 14px 24px;
  color: #fff;
  background: var(--primary);
  border: 0;
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
}
#priceForm button:hover { background: var(--primary-dark); }

.categories {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 20px 0 8px;
}
.categories a {
  padding: 8px 16px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--ink);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}
.categories a:hover { border-color: var(--primary); color: var(--primary); }

#status, #results {
  max-width: 850px;
  margin: 15px auto;
  padding: 0 16px;
}
#status { text-align: center; color: var(--muted); min-height: 20px; }

.best-price {
  padding: 17px;
  color: var(--green-ink);
  background: var(--green-bg);
  border-radius: 9px;
  margin-bottom: 16px;
}

.price-list { display: grid; gap: 13px; }

.seller-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.seller-card.cheapest { border: 2px solid var(--green); }
.seller-card h3 { margin: 0 0 8px; font-size: 17px; }
.seller-card p { margin: 4px 0; color: var(--muted); font-size: 14px; }
.price-block { min-width: 150px; text-align: right; }
.price-block strong { display: block; margin-bottom: 9px; font-size: 20px; }
.price-block a {
  display: inline-block;
  padding: 8px 16px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  border-radius: 6px;
  font-size: 14px;
}

.spec-table { width: 100%; border-collapse: collapse; margin-top: 20px; background: #fff; }
.spec-table th, .spec-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.spec-table th { color: var(--muted); width: 40%; }

.trust-note {
  max-width: 850px;
  margin: 24px auto;
  padding: 14px 16px;
  background: #eef2ff;
  border-radius: 8px;
  font-size: 13px;
  color: var(--muted);
}

.legal-page { max-width: 800px; margin: 30px auto; padding: 0 16px 60px; }
.legal-page h1 { font-size: 26px; }
.legal-page h2 { font-size: 19px; margin-top: 28px; }
.legal-page p, .legal-page li { color: var(--muted); font-size: 15px; }

.site-footer {
  margin-top: 40px;
  padding: 30px 0;
  background: #fff;
  border-top: 1px solid var(--border);
}
.site-footer .wrap { text-align: center; }
.disclosure { max-width: 700px; margin: 0 auto 16px; font-size: 13px; color: var(--muted); }
.footer-nav a { margin: 0 8px; font-size: 13px; color: var(--muted); text-decoration: none; }
.copyright { margin-top: 16px; font-size: 12px; color: #9ca3af; }

@media (max-width: 600px) {
  #priceForm { flex-direction: column; }
  .seller-card { align-items: flex-start; flex-direction: column; }
  .price-block { text-align: left; }
}