* { box-sizing: border-box; }
:root {
  --bg: #ffffff;
  --ink: #111111;
  --muted: #6b7280;
  --accent: #16a34a;
  --accent-ink: #ffffff;
  --card: #f8fafc;
  --border: #e5e7eb;
}
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif; }
a { color: inherit; text-decoration: none; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }
nav { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--bg); z-index: 10; }
nav .links a { margin-left: 16px; color: var(--muted); }
.btn { display: inline-block; padding: 12px 18px; border-radius: 10px; background: var(--accent); color: var(--accent-ink); font-weight: 600; border: 0; cursor: pointer; }
.btn.secondary { background: #111111; color: #fff; }
.hero { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; align-items: center; padding: 42px 0; }
.hero h1 { font-size: 44px; line-height: 1.05; margin: 0 0 12px; }
.hero p { color: var(--muted); font-size: 18px; }
.hero .card { background: var(--card); border: 1px solid var(--border); padding: 18px; border-radius: 16px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { border: 1px solid var(--border); border-radius: 14px; overflow: hidden; background: #fff; }
.card img { width: 100%; height: 220px; object-fit: cover; display: block; }
.card .pad { padding: 14px; }
.price { font-weight: 700; }
.compare { color: var(--muted); text-decoration: line-through; font-weight: 400; margin-left: 6px; }
.badge { font-size: 12px; color: #065f46; background: #d1fae5; padding: 4px 8px; border-radius: 999px; display: inline-block; }
footer { border-top: 1px solid var(--border); margin-top: 42px; padding: 22px 0; color: var(--muted); }
.product-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 32px 0; }
.product-hero img { width: 100%; height: 440px; object-fit: cover; border-radius: 12px; }
ul.features { margin: 10px 0 0 18px; }
.kicker { letter-spacing: .18em; text-transform: uppercase; font-size: 12px; color: var(--muted); }
.banner { background: #ecfdf5; border: 1px solid #bbf7d0; padding: 10px 14px; border-radius: 12px; }
@media (max-width: 860px) {
  .hero, .product-hero { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  nav .links a { margin-left: 10px; }
}