:root {
  --bg: #f3f8fb;
  --card: #fff;
  --ink: #143047;
  --muted: #5b7388;
  --line: rgba(20, 48, 71, 0.1);
  --accent: #1a8bb8;
  --accent-dark: #136a8c;
  --ok: #1f8a4c;
  --radius: 1rem;
  --shadow: 0 10px 28px rgba(20, 70, 110, 0.08);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 500px at 10% -10%, #d7f0fb 0%, transparent 55%),
    radial-gradient(900px 400px at 100% 0%, #e7f7ef 0%, transparent 50%),
    var(--bg);
  color: var(--ink);
  min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); }
.wrap { width: min(1120px, calc(100% - 2rem)); margin-inline: auto; }
.top {
  position: sticky; top: 0; z-index: 10;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.86);
  border-bottom: 1px solid var(--line);
}
.top__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 0.85rem 0;
}
.brand { display: flex; align-items: center; gap: 0.65rem; color: inherit; }
.brand__mark {
  width: 2.4rem; height: 2.4rem; display: grid; place-items: center;
  border-radius: 0.8rem; background: #e7f6fc; font-size: 1.2rem;
}
.brand strong { display: block; font-size: 1rem; }
.brand small { color: var(--muted); font-size: 0.78rem; }
.nav { display: flex; flex-wrap: wrap; gap: 0.75rem 1rem; align-items: center; font-weight: 600; }
main.wrap { padding: 1.5rem 0 3rem; }
.foot { padding: 1rem 0 2rem; color: var(--muted); font-size: 0.85rem; }
.hero { display: grid; gap: 0.5rem; margin-bottom: 1.25rem; }
.hero h1 { margin: 0; font-size: clamp(1.6rem, 2vw + 1rem, 2.2rem); letter-spacing: -0.02em; }
.hero p { margin: 0; color: var(--muted); max-width: 40rem; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
}
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column;
}
.card__img {
  aspect-ratio: 4/3; background: linear-gradient(145deg, #dff3fb, #eef8f2);
  display: grid; place-items: center; font-size: 2.5rem;
}
.card__img img { width: 100%; height: 100%; object-fit: cover; }
.card__body { padding: 0.9rem 1rem 1.05rem; display: grid; gap: 0.35rem; flex: 1; }
.card__body h2 { margin: 0; font-size: 1.02rem; line-height: 1.3; }
.card__body h2 a { color: inherit; }
.price { font-weight: 800; color: var(--accent-dark); }
.muted { color: var(--muted); font-size: 0.88rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px; border: 1px solid var(--accent); background: var(--accent);
  color: #fff; font-weight: 700; padding: 0.55rem 1.05rem; cursor: pointer; font: inherit;
}
.btn:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; }
.btn--ghost { background: #fff; color: var(--accent); }
.btn--ghost:hover { background: #eef7fc; }
.panel {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.1rem 1.2rem;
}
.stack { display: grid; gap: 0.85rem; }
.row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
label { display: grid; gap: 0.3rem; font-weight: 600; font-size: 0.9rem; }
input, select, textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 0.7rem;
  padding: 0.6rem 0.75rem; font: inherit; background: #fff;
}
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 0.65rem 0.4rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.badge {
  display: inline-flex; padding: 0.15rem 0.5rem; border-radius: 999px;
  background: #e8f6fc; color: var(--accent-dark); font-size: 0.75rem; font-weight: 700;
}
.flash {
  background: #e9f9ef; border: 1px solid rgba(31, 138, 76, 0.25); color: var(--ok);
  padding: 0.7rem 0.9rem; border-radius: 0.8rem; font-weight: 600;
}
.login-box { max-width: 24rem; margin: 3rem auto; }
.product-page {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 1.25rem;
}
@media (max-width: 760px) {
  .product-page { grid-template-columns: 1fr; }
  .top__inner { flex-direction: column; align-items: flex-start; }
}