:root {
  --bg: #eef4f6;
  --surface: #ffffff;
  --text: #0f2a3a;
  --muted: #4f6675;
  --brand: #0b7d88;
  --brand-strong: #0d334d;
  --accent: #c88539;
  --danger: #9f2a2a;
  --ok: #146b3a;
  --line: #c9d9e3;
  --shadow: 0 10px 30px rgba(13, 51, 77, 0.12);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Trebuchet MS", Verdana, sans-serif;
  background: radial-gradient(circle at top left, #dff4fb, var(--bg));
  color: var(--text);
}

a { color: var(--brand-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

.container { width: min(1100px, 92vw); margin: 0 auto; }
.main-content { padding: 2rem 0 3rem; }

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 700;
}

.logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.nav { display: flex; gap: 1rem; align-items: center; }
.nav a { font-weight: 600; color: var(--muted); }
.nav a.active { color: var(--brand-strong); }

.hero {
  background: linear-gradient(120deg, #d7f1fb, #e7f8f6);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.eyebrow {
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.card img,
.product-detail img {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #f4f7fa;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.price { font-size: 1.2rem; font-weight: 700; margin: 0.5rem 0; }
.muted { color: var(--muted); }
.success { color: var(--ok); }

button,
.button {
  display: inline-block;
  border: none;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  padding: 0.6rem 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

button:hover,
.button:hover { background: var(--brand-strong); text-decoration: none; }
button.danger { background: var(--danger); }

label { display: grid; gap: 0.35rem; margin: 0.45rem 0; }
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
  background: #fff;
}

.flash {
  margin-top: 0.8rem;
  padding: 0.7rem 0.9rem;
  border-radius: 10px;
}

.flash-success { background: #e8f8ef; border: 1px solid #8ecfa8; }
.flash-error { background: #fdeced; border: 1px solid #e9a1a6; }

.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; align-items: start; }
.stack { display: grid; gap: 0.8rem; }
.cart-row {
  display: grid;
  grid-template-columns: 2fr 1fr auto auto;
  align-items: center;
  gap: 0.7rem;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 12px;
  padding: 0.8rem;
}

.inline-form { display: flex; gap: 0.45rem; align-items: center; }
.inline-form input { max-width: 90px; }

.order-summary {
  margin-top: 1rem;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: var(--shadow);
}

.checkout-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 1rem; }
.checkout-form {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 12px;
  padding: 1rem;
}

.admin-header { display: flex; justify-content: space-between; align-items: center; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--line);
}

th, td {
  text-align: left;
  padding: 0.6rem;
  border-bottom: 1px solid var(--line);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, #ffffff, #f4f9fb);
  padding: 2rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

@media (max-width: 800px) {
  .product-detail,
  .checkout-grid,
  .cart-row {
    grid-template-columns: 1fr;
  }

  .nav {
    font-size: 0.95rem;
    gap: 0.6rem;
  }
}