:root {
  --blue: #1565c0;
  --blue-dark: #0d47a1;
  --blue-light: #e3f0fc;
  --accent: #ff9800;
  --text: #1c2733;
  --muted: #5b6b7b;
  --bg: #f6f9fc;
  --card: #ffffff;
  --border: #dde6ef;
  --radius: 12px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.25; }
h1 { font-size: clamp(1.6rem, 4vw, 2.4rem); margin: 0.2em 0 0.4em; }
h2 { font-size: clamp(1.3rem, 3vw, 1.7rem); margin: 1.4em 0 0.6em; }
.wrap { max-width: 1140px; margin: 0 auto; padding-inline: 20px; }
.narrow { max-width: 760px; }
.center { text-align: center; }

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  padding-block: 12px;
}
.logo {
  font-weight: 800; font-size: 1.25rem; color: var(--text);
  letter-spacing: -0.5px; white-space: nowrap;
}
.logo span { color: var(--blue); }
.logo:hover { text-decoration: none; }
.main-nav { display: flex; gap: 4px 14px; flex-wrap: wrap; flex: 1; }
.main-nav a { color: var(--muted); font-size: 0.92rem; font-weight: 600; padding: 4px 2px; }
.main-nav a:hover { color: var(--blue); text-decoration: none; }

/* Buttons */
.btn {
  display: inline-block; padding: 10px 20px; border-radius: 999px;
  font-weight: 700; font-size: 0.95rem; white-space: nowrap;
}
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.btn-primary, .btn-shop { background: var(--blue); color: #fff; }
.btn-buy { background: var(--accent); color: #fff; font-size: 1.05rem; padding: 13px 28px; }
.btn-ghost { background: #fff; color: var(--blue); border: 2px solid var(--blue); }
.btn-small { padding: 6px 14px; font-size: 0.85rem; background: var(--blue-light); color: var(--blue-dark); }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--blue-dark), var(--blue) 60%, #1e88e5);
  color: #fff; padding-block: 56px 48px;
}
.hero h1 { color: #fff; }
.hero .accent { color: #ffd54f; }
.hero .lead { max-width: 720px; font-size: 1.08rem; }
.hero a:not(.btn) { color: #fff; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin: 22px 0 10px; }
.hero .btn-ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.usp {
  list-style: none; padding: 0; margin: 22px 0 0;
  display: flex; gap: 8px 26px; flex-wrap: wrap;
  font-size: 0.93rem; opacity: 0.95;
}

/* Sections */
.section { padding-block: 44px; }
.section-alt { background: #fff; border-block: 1px solid var(--border); }
.page-head { background: #fff; border-bottom: 1px solid var(--border); padding-block: 26px 30px; }
.page-head .lead, .hero .lead { font-size: 1.05rem; }
.breadcrumbs { font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }
.breadcrumbs span { color: var(--text); }

/* Tiles */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }
.tile {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px 18px 14px; position: relative; transition: box-shadow .15s, transform .15s;
}
.tile:hover { text-decoration: none; box-shadow: 0 6px 20px rgba(21,101,192,.12); transform: translateY(-2px); }
.tile h3 { margin: 0 0 4px; font-size: 1.02rem; color: var(--text); }
.tile p { margin: 0; font-size: 0.85rem; color: var(--muted); }
.tile-arrow { position: absolute; right: 16px; top: 16px; color: var(--blue); font-weight: 700; }

/* Product cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: box-shadow .15s, transform .15s;
}
.card:hover { box-shadow: 0 8px 24px rgba(21,101,192,.13); transform: translateY(-2px); }
.card-img { background: #fff; aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; padding: 10px; }
.card-img img { max-height: 100%; width: auto; object-fit: contain; }
.card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { margin: 6px 0; font-size: 1rem; }
.card-body h3 a { color: var(--text); }
.card-body p { margin: 0 0 12px; font-size: 0.88rem; color: var(--muted); flex: 1; }
.card-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.badges { display: flex; gap: 6px; flex-wrap: wrap; min-height: 20px; }
.badge {
  background: var(--blue-light); color: var(--blue-dark);
  font-size: 0.72rem; font-weight: 700; padding: 2px 9px; border-radius: 999px;
  text-transform: uppercase; letter-spacing: .3px;
}
.price { font-weight: 800; color: var(--blue-dark); }
.price-big { font-size: 1.6rem; }

/* Product detail */
.product-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
.product-img {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; display: flex; align-items: center; justify-content: center;
}
.product-img img { max-height: 440px; width: auto; object-fit: contain; }
.product-short { font-size: 1.05rem; color: var(--muted); }
.price-box { margin: 18px 0; }
.price-note { display: block; font-size: 0.82rem; color: var(--muted); margin-top: 4px; max-width: 380px; }
.buy-usp { list-style: none; padding: 0; margin: 16px 0 0; font-size: 0.9rem; color: var(--muted); }
.buy-usp li { margin-bottom: 4px; }
.params { padding-left: 20px; }
.params li { margin-bottom: 6px; }

/* Steps + FAQ */
.steps li { margin-bottom: 12px; }
details {
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 16px; margin-bottom: 10px;
}
details summary { font-weight: 700; cursor: pointer; }
details p { margin: 10px 0 2px; color: var(--muted); }

/* Footer */
.site-footer { background: #10233a; color: #c6d4e2; margin-top: 40px; font-size: 0.9rem; }
.site-footer a { color: #8fc1f5; }
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px;
  padding-block: 38px 20px;
}
.site-footer h3 { color: #fff; font-size: 0.95rem; margin: 0 0 10px; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 6px; }
.logo-footer { color: #fff; margin-bottom: 10px; }
.logo-footer span { color: #64b5f6; }
.footer-note { border-top: 1px solid #23405f; padding-block: 14px; font-size: 0.8rem; color: #7d92a8; }

@media (max-width: 820px) {
  .product-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 20px; }
  .main-nav { order: 3; width: 100%; }
  .header-inner { gap: 10px; }
  .btn-shop { margin-left: auto; }
}