:root {
  --primary: #11c5a6;
  --secondary: #101828;
  --text: #172033;
  --muted: #667085;
  --line: #e4e7ec;
  --bg: #f7faf9;
  --hero-image: url('https://images.unsplash.com/photo-1558981806-ec527fa84c39?auto=format&fit=crop&w=1800&q=80');
}

* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, Helvetica, sans-serif; color: var(--text); background: var(--bg); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-header {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center; justify-content: space-between;
  gap: 18px; padding: 16px clamp(18px, 5vw, 72px); background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.brand img { width: 42px; height: 42px; object-fit: contain; border-radius: 8px; }
nav { display: flex; flex-wrap: wrap; gap: 14px; color: var(--muted); font-weight: 700; }
nav a:hover { color: var(--primary); }

.hero {
  min-height: 560px; display: grid; align-items: center; padding: 70px clamp(20px, 6vw, 90px);
  color: white; background:
    linear-gradient(90deg, rgba(16,24,40,.92), rgba(16,24,40,.52)),
    var(--hero-image) center/cover;
}
.hero > div { max-width: 760px; }
.eyebrow { color: var(--primary); text-transform: uppercase; font-size: 13px; font-weight: 800; letter-spacing: .08em; }
h1 { font-size: clamp(34px, 7vw, 68px); line-height: 1; margin: 10px 0 18px; }
h2 { font-size: clamp(24px, 4vw, 36px); margin: 0 0 22px; }
.hero p { font-size: 18px; max-width: 660px; color: rgba(255,255,255,.86); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 12px 18px;
  border-radius: 8px; background: var(--primary); color: var(--secondary); font-weight: 800; border: 0; cursor: pointer;
}
.btn.ghost { background: transparent; color: white; outline: 1px solid rgba(255,255,255,.45); }

.section { padding: 48px clamp(18px, 5vw, 72px); max-width: 1240px; margin: 0 auto; }
.section-title { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 18px; }
.section-title a { color: var(--primary); font-weight: 800; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; }
.card {
  overflow: hidden; background: white; border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 12px 28px rgba(16,24,40,.06);
}
.card img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; background: #fff; }
.card div { padding: 18px; display: grid; gap: 9px; }
.card small, .card span { color: var(--muted); }
.card h3 { margin: 0; font-size: 21px; }
.card p { margin: 0; color: var(--muted); }
.card strong, .price { font-size: 24px; color: var(--secondary); }

.category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 14px; }
.category {
  padding: 24px; min-height: 110px; display: flex; align-items: end; border-radius: 8px; color: white; font-weight: 900;
  background: linear-gradient(135deg, var(--secondary), #27364f);
}
.faq-band { background: white; border-radius: 8px; }
.faq-list { display: grid; gap: 12px; }
details { background: white; border: 1px solid var(--line); border-radius: 8px; padding: 16px; }
summary { cursor: pointer; font-weight: 800; }
details p { color: var(--muted); }
footer { padding: 28px; text-align: center; color: var(--muted); }

select, input, textarea {
  width: 100%; min-height: 44px; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; background: white; font: inherit;
}

.product-page {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(320px, 520px); gap: 34px;
  padding: 40px clamp(18px, 5vw, 72px); max-width: 1240px; margin: 0 auto;
}
.gallery, .product-info { min-width: 0; }
.main-image { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; border-radius: 8px; background: #fff; }
.thumbs { display: grid; grid-template-columns: repeat(auto-fill, minmax(80px, 1fr)); gap: 10px; margin-top: 12px; }
.thumbs button { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; padding: 0; background: white; cursor: pointer; }
.thumbs img { width: 100%; aspect-ratio: 1; object-fit: contain; background: #fff; }
.product-info { background: white; border: 1px solid var(--line); border-radius: 8px; padding: 26px; align-self: start; }
.product-info h1 { color: var(--secondary); font-size: clamp(32px, 5vw, 50px); }
.specs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 16px; }
.specs dt { font-weight: 800; }
.specs dd { margin: 0; color: var(--muted); }
.wide { grid-column: 1 / -1; padding-left: 0; padding-right: 0; width: 100%; }
.fixed-whatsapp {
  position: fixed; right: 18px; bottom: 18px; z-index: 20; padding: 14px 18px; border-radius: 999px;
  background: #22c55e; color: white; font-weight: 900; box-shadow: 0 12px 28px rgba(34,197,94,.32);
}

@media (max-width: 760px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .hero { min-height: 500px; }
  .section-title { align-items: flex-start; flex-direction: column; }
  .product-page { grid-template-columns: 1fr; }
  .specs { grid-template-columns: 1fr; }
}