:root {
  --navy: #0f2f6b;
  --navy-deep: #0a214d;
  --magenta: #c2185b;
  --orange: #e67e22;
  --green: #2e7d32;
  --blue: #1565c0;
  --bg: #f7f9fc;
  --card: #ffffff;
  --text: #1a2332;
  --muted: #5b6b7c;
  --border: #e3e8ef;
  --shadow: 0 10px 30px rgba(15, 47, 107, 0.08);
  --radius: 14px;
  --font: "Nunito", sans-serif;
  --display: "Poppins", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, var(--bg) 220px);
  min-height: 100vh;
}
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--magenta); }
img { max-width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 2rem)); margin: 0 auto; }

.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
.top-bar { background: linear-gradient(90deg, var(--navy), #1a4a9c); color: #fff; font-size: 0.9rem; }
.top-bar-inner { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 0.55rem 0; flex-wrap: wrap; }
.top-bar p { margin: 0; opacity: 0.95; }
.top-links { display: flex; gap: 1rem; align-items: center; }
.top-links a, .top-links .welcome { color: #fff; font-weight: 700; }
.main-header-inner { display: grid; grid-template-columns: auto 1fr auto auto; gap: 1rem; align-items: center; padding: 0.85rem 0; }
.brand img { height: 64px; width: auto; }
.menu-toggle { display: none; border: 1px solid var(--border); background: #fff; border-radius: 10px; font-size: 1.2rem; padding: 0.4rem 0.7rem; cursor: pointer; }
.search-form { display: flex; gap: 0.4rem; }
.search-form input {
  flex: 1; border: 1px solid var(--border); border-radius: 999px; padding: 0.7rem 1rem; font: inherit;
}
.search-form button, .btn {
  border: 0; border-radius: 999px; padding: 0.7rem 1.2rem; font: inherit; font-weight: 800; cursor: pointer;
  background: linear-gradient(135deg, var(--magenta), var(--orange)); color: #fff;
}
.btn-secondary { background: var(--navy); }
.btn-outline { background: transparent; color: var(--navy); border: 2px solid var(--navy); }
.hero .btn-outline { background: rgba(255,255,255,0.12); color: #fff; border-color: #fff; }
.cart-link { position: relative; display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; border-radius: 50%; background: #f0f4fb; }
.cart-count { position: absolute; top: -4px; right: -4px; background: var(--magenta); color: #fff; border-radius: 999px; min-width: 22px; height: 22px; font-size: 0.75rem; font-weight: 800; display: grid; place-items: center; }

.category-nav { background: #fff; border-top: 1px solid var(--border); }
.category-nav ul { display: flex; gap: 0.25rem; list-style: none; margin: 0; padding: 0.55rem 0; overflow-x: auto; }
.category-nav a {
  display: inline-block; white-space: nowrap; padding: 0.45rem 0.85rem; border-radius: 999px;
  color: var(--navy); font-weight: 700; font-size: 0.92rem;
}
.category-nav a:hover { background: #eef3ff; color: var(--magenta); }

.alert { margin: 1rem auto; padding: 0.9rem 1rem; border-radius: 12px; font-weight: 700; }
.alert-success { background: #e8f5e9; color: #1b5e20; }
.alert-error { background: #fdecea; color: #b71c1c; }
.alert-info { background: #e3f2fd; color: #0d47a1; }

.hero {
  position: relative; overflow: hidden; min-height: 420px; color: #fff;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,0.18), transparent 40%),
    linear-gradient(135deg, #0f2f6b 0%, #1a4a9c 45%, #c2185b 100%);
}
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2rem; align-items: center; padding: 3.5rem 0; }
.hero h1 { font-family: var(--display); font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.1; margin: 0 0 1rem; }
.hero p { font-size: 1.1rem; max-width: 38ch; opacity: 0.95; }
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.5rem; }
.hero-card {
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25);
  backdrop-filter: blur(8px); border-radius: 24px; padding: 1.5rem; box-shadow: var(--shadow);
}
.hero-card img { width: 100%; max-height: 220px; object-fit: contain; margin-bottom: 1rem; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 1.5rem 0 2.5rem; }
.feature-card {
  min-height: 160px; border-radius: var(--radius); color: #fff; display: flex; align-items: flex-end;
  padding: 1.25rem; font-family: var(--display); font-size: 1.35rem; font-weight: 800; box-shadow: var(--shadow);
}
.feature-card:nth-child(1) { background: linear-gradient(160deg, #1565c0, #0f2f6b); }
.feature-card:nth-child(2) { background: linear-gradient(160deg, #e67e22, #c2185b); }
.feature-card:nth-child(3) { background: linear-gradient(160deg, #2e7d32, #0f2f6b); }

.section { padding: 2rem 0 3rem; }
.section-title { font-family: var(--display); color: var(--navy); margin: 0 0 0.35rem; }
.section-sub { color: var(--muted); margin: 0 0 1.5rem; }
.product-grid, .category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 1rem; }
.product-card, .category-card, .panel, .auth-card, .table-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow);
}
.product-card { overflow: hidden; display: flex; flex-direction: column; }
.product-media {
  height: 170px; background: linear-gradient(180deg, #f4f7ff, #fff);
  display: grid; place-items: center; padding: 1rem;
}
.product-media img { max-height: 140px; object-fit: contain; }
.product-body { padding: 1rem; display: flex; flex-direction: column; gap: 0.4rem; flex: 1; }
.product-body h3 { margin: 0; font-size: 1.05rem; color: var(--navy); }
.price { font-size: 1.15rem; font-weight: 800; color: var(--magenta); }
.price-locked { color: var(--muted); font-weight: 700; font-size: 0.92rem; }
.stock-badge { display: inline-block; font-size: 0.8rem; font-weight: 800; padding: 0.2rem 0.55rem; border-radius: 999px; background: #e8f5e9; color: #1b5e20; }
.stock-badge.low { background: #fff3e0; color: #e65100; }
.stock-badge.out { background: #fdecea; color: #b71c1c; }
.category-card { padding: 1.2rem; text-align: center; font-weight: 800; color: var(--navy); transition: transform .2s ease; }
.category-card:hover { transform: translateY(-3px); color: var(--magenta); }

.page-hero { padding: 2rem 0 1rem; }
.page-hero h1 { font-family: var(--display); color: var(--navy); margin: 0 0 0.4rem; }
.auth-wrap { display: grid; place-items: center; padding: 2rem 0 3rem; }
.auth-card { width: min(520px, 100%); padding: 1.75rem; }
.auth-card h1 { margin-top: 0; color: var(--navy); font-family: var(--display); }
.form-grid { display: grid; gap: 0.9rem; }
.form-grid.two { grid-template-columns: 1fr 1fr; }
label { display: grid; gap: 0.35rem; font-weight: 700; color: var(--navy-deep); }
input, select, textarea {
  width: 100%; border: 1px solid var(--border); border-radius: 12px; padding: 0.75rem 0.9rem; font: inherit; background: #fff;
}
.muted { color: var(--muted); }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.85rem 0.75rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { background: #f4f7ff; color: var(--navy); font-weight: 800; }
.badge { display: inline-block; padding: 0.2rem 0.55rem; border-radius: 999px; font-size: 0.78rem; font-weight: 800; }
.badge-pending { background: #fff3e0; color: #e65100; }
.badge-approved { background: #e8f5e9; color: #1b5e20; }
.badge-rejected, .badge-unpaid, .badge-cancelled { background: #fdecea; color: #b71c1c; }
.badge-paid, .badge-delivered, .badge-confirmed { background: #e3f2fd; color: #0d47a1; }
.badge-processing, .badge-shipped, .badge-partial { background: #f3e5f5; color: #6a1b9a; }

.cart-layout, .checkout-layout, .admin-layout { display: grid; grid-template-columns: 2fr 1fr; gap: 1.25rem; }
.panel { padding: 1.25rem; }
.summary-row { display: flex; justify-content: space-between; margin: 0.55rem 0; }
.summary-total { font-size: 1.2rem; font-weight: 800; color: var(--navy); border-top: 1px solid var(--border); padding-top: 0.75rem; margin-top: 0.75rem; }

.admin-shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
.admin-sidebar { background: linear-gradient(180deg, var(--navy-deep), #123a7a); color: #fff; padding: 1.25rem; }
.admin-sidebar a { display: block; color: #fff; padding: 0.65rem 0.75rem; border-radius: 10px; margin-bottom: 0.25rem; font-weight: 700; }
.admin-sidebar a:hover, .admin-sidebar a.active { background: rgba(255,255,255,0.14); color: #fff; }
.admin-main { padding: 1.25rem; background: var(--bg); }
.admin-top { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 1.25rem; }
.stat-card { background: #fff; border-radius: var(--radius); padding: 1rem; border: 1px solid var(--border); box-shadow: var(--shadow); }
.stat-card strong { display: block; font-size: 1.6rem; color: var(--navy); }

.site-footer { margin-top: 3rem; background: #0a214d; color: #d7e2f5; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 1.5rem; padding: 2.5rem 0; }
.footer-logo { max-width: 220px; margin-bottom: 0.75rem; background: #fff; border-radius: 12px; padding: 0.5rem; }
.site-footer h4 { color: #fff; margin: 0 0 0.75rem; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 0.4rem; }
.site-footer a { color: #d7e2f5; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding: 1rem 0; font-size: 0.92rem; }

@media (max-width: 900px) {
  .hero-inner, .cart-layout, .checkout-layout, .admin-layout, .footer-grid, .feature-grid, .form-grid.two { grid-template-columns: 1fr; }
  .admin-shell { grid-template-columns: 1fr; }
  .menu-toggle { display: inline-block; }
  .category-nav { display: none; }
  .category-nav.open { display: block; }
  .main-header-inner { grid-template-columns: auto 1fr auto; }
  .search-form { grid-column: 1 / -1; order: 4; }
}