:root {
  --navy: #1B2A4A;
  --teal: #2A9D8F;
  --teal-dk: #1F7A6F;
  --coral: #E76F51;
  --gold: #E9C46A;
  --slate: #264653;
  --gray: #6B7280;
  --light: #F8FAFC;
  --border: #E2E8F0;
  --white: #ffffff;
  --max: 960px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  color: #1f2937;
  background: var(--white);
  line-height: 1.55;
}
a { color: var(--teal-dk); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 1.25rem; }
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--white);
  position: sticky; top: 0; z-index: 10;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}
.logo {
  font-weight: 700; font-size: 1.25rem; color: var(--navy);
  letter-spacing: -0.02em; text-decoration: none;
}
.logo span { color: var(--teal); }
nav a {
  margin-left: 1.25rem; color: var(--slate); font-size: 0.95rem;
  text-decoration: none; font-weight: 500;
}
nav a:hover { color: var(--teal); }
.hero {
  background: linear-gradient(160deg, #F0FDFA 0%, #F8FAFC 55%, #fff 100%);
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--navy); margin: 0 0 0.75rem; letter-spacing: -0.03em;
  line-height: 1.2;
}
.hero p.lead {
  font-size: 1.125rem; color: var(--gray); max-width: 36rem; margin: 0 0 1.5rem;
}
.btn {
  display: inline-block; padding: 0.7rem 1.25rem; border-radius: 8px;
  font-weight: 600; font-size: 0.95rem; text-decoration: none;
  border: 2px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--teal); color: #fff; }
.btn-primary:hover { background: var(--teal-dk); text-decoration: none; color: #fff; }
.btn-secondary {
  background: transparent; color: var(--navy); border-color: var(--navy);
  margin-left: 0.5rem;
}
.btn-secondary:hover { background: var(--navy); color: #fff; text-decoration: none; }
.btn-coral { background: var(--coral); color: #fff; }
.btn-coral:hover { filter: brightness(0.95); color: #fff; text-decoration: none; }
.btn-lg { padding: 0.85rem 1.5rem; font-size: 1.05rem; }
.price { font-size: 1.75rem; font-weight: 700; color: var(--navy); }
.price small { font-size: 0.9rem; font-weight: 500; color: var(--gray); }
.section { padding: 3rem 0; }
.section h2 {
  color: var(--navy); font-size: 1.6rem; margin: 0 0 0.5rem;
  letter-spacing: -0.02em;
}
.section .sub { color: var(--gray); margin: 0 0 1.75rem; }
.grid {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.card {
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
  background: var(--white); display: flex; flex-direction: column;
  transition: box-shadow 0.15s ease;
}
.card:hover { box-shadow: 0 8px 24px rgba(27,42,74,0.08); }
.card .thumb {
  background: var(--light); height: 160px; overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.card .thumb img {
  width: 100%; height: 160px; object-fit: cover; object-position: top left;
}
.card .body { padding: 1rem 1.1rem 1.25rem; flex: 1; display: flex; flex-direction: column; }
.card h3 { margin: 0 0 0.4rem; font-size: 1.05rem; color: var(--navy); }
.card h3 a { color: inherit; text-decoration: none; }
.card h3 a:hover { color: var(--teal); }
.card p { margin: 0 0 1rem; color: var(--gray); font-size: 0.92rem; flex: 1; }
.card .meta {
  display: flex; align-items: center; justify-content: space-between; gap: 0.5rem;
}
.badge {
  display: inline-block; font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.04em;
  padding: 0.2rem 0.5rem; border-radius: 999px;
  background: #E8F5F3; color: var(--teal-dk);
}
.badge-free { background: #FEF3C7; color: #92400E; }
.banner {
  background: var(--navy); color: #fff; border-radius: 12px;
  padding: 1.75rem 1.5rem; display: flex; flex-wrap: wrap;
  align-items: center; justify-content: space-between; gap: 1rem;
}
.banner h3 { margin: 0 0 0.35rem; font-size: 1.25rem; }
.banner p { margin: 0; opacity: 0.85; font-size: 0.95rem; }
.product-hero {
  display: grid; gap: 2rem;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: start; padding: 2.5rem 0;
}
@media (max-width: 760px) {
  .product-hero { grid-template-columns: 1fr; }
  nav a { margin-left: 0.75rem; font-size: 0.85rem; }
}
.preview-frame {
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
  background: var(--light);
}
.preview-frame img { width: 100%; object-fit: contain; max-height: 480px; object-position: top; }
.buy-box {
  border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem;
  background: #fff; position: sticky; top: 76px;
}
.buy-box .price { margin: 0.5rem 0 1rem; }
.buy-box .btn { width: 100%; text-align: center; margin-bottom: 0.6rem; }
.buy-box .btn-secondary { margin-left: 0; }
.features { list-style: none; padding: 0; margin: 1rem 0 0; }
.features li {
  padding: 0.45rem 0 0.45rem 1.5rem; position: relative;
  color: var(--slate); font-size: 0.95rem;
}
.features li::before {
  content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 700;
}
.site-footer {
  border-top: 1px solid var(--border); padding: 2rem 0; margin-top: 2rem;
  color: var(--gray); font-size: 0.9rem;
}
.site-footer .wrap {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
}
.site-footer a { color: var(--gray); margin-right: 1rem; }
.note {
  font-size: 0.85rem; color: var(--gray); margin-top: 1.5rem;
  padding-top: 1rem; border-top: 1px solid var(--border);
}
.delivery-list { list-style: none; padding: 0; }
.delivery-list li {
  border: 1px solid var(--border); border-radius: 10px;
  padding: 1rem 1.15rem; margin-bottom: 0.75rem;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  flex-wrap: wrap;
}
.delivery-list strong { color: var(--navy); }
.warn {
  background: #FFFBEB; border: 1px solid #FDE68A; border-radius: 8px;
  padding: 0.9rem 1rem; font-size: 0.9rem; color: #92400E; margin: 1rem 0 1.5rem;
}
.prose h2 { margin-top: 2rem; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin-bottom: 0.4rem; }