:root {
  --ink: #1a1a1a;
  --paper: #fafaf8;
  --accent: #b5472b;
  --line: #ddd;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Georgia, 'Times New Roman', serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

.wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

.site-header { border-bottom: 1px solid var(--line); padding: 18px 0; }
.nav-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.logo { font-size: 20px; font-weight: bold; color: var(--ink); text-decoration: none; }
.site-header nav a { margin-left: 16px; color: var(--ink); text-decoration: none; }
.site-header nav a:first-child { margin-left: 0; }
.site-header nav a:hover { color: var(--accent); }

main { padding: 40px 0; min-height: 50vh; }

h1 { font-size: 32px; }

.hero { text-align: center; padding: 30px 0 40px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  text-decoration: none;
  border-radius: 3px;
  border: none;
  font-size: 15px;
  cursor: pointer;
}

.product-list { list-style: none; padding: 0; }
.product-list li { padding: 10px 0; border-bottom: 1px solid var(--line); }
.product-list a { color: var(--ink); text-decoration: none; font-weight: bold; }

.price { font-size: 20px; color: var(--accent); }

form label { display: block; margin-bottom: 12px; }
form input { display: block; margin-top: 4px; padding: 8px; width: 100%; max-width: 320px; border: 1px solid var(--line); }

.error { color: var(--accent); font-weight: bold; }

.site-footer { border-top: 1px solid var(--line); padding: 24px 0; font-size: 13px; color: #666; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-inner nav a { margin-left: 14px; color: #666; }

@media (max-width: 480px) {
  .wrap { padding: 0 16px; }
  .nav-inner { gap: 6px 10px; }
  .logo { font-size: 18px; }
  .site-header nav a { margin-left: 10px; font-size: 14px; }
  main { padding: 28px 0; }
  h1 { font-size: 26px; }
  .hero { padding: 12px 0 24px; }
  .price { font-size: 18px; }
  form input { max-width: 100%; }
  .footer-inner { justify-content: flex-start; }
  .footer-inner nav a:first-child { margin-left: 0; }
}