:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header.topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

header.topbar .logo {
  font-weight: 700;
  font-size: 20px;
  color: var(--primary);
  text-decoration: none;
}

nav a, .navlink {
  color: var(--text);
  text-decoration: none;
  margin-left: 18px;
  font-size: 14px;
  cursor: pointer;
}

nav a:hover, .navlink:hover { color: var(--primary); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card h3 { margin: 0; font-size: 16px; }
.card .desc { color: var(--muted); font-size: 13px; flex-grow: 1; }
.card .price { font-weight: 700; color: var(--primary); font-size: 18px; }
.card .stock { font-size: 12px; color: var(--muted); }

button, .btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}
button:hover, .btn:hover { background: var(--primary-dark); }
button.secondary { background: #e2e8f0; color: var(--text); }
button.danger { background: var(--danger); }
button:disabled { background: #cbd5e1; cursor: not-allowed; }

form.stack { display: flex; flex-direction: column; gap: 12px; max-width: 380px; }
form.stack label { font-size: 13px; color: var(--muted); }
input, textarea, select {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  width: 100%;
}

.auth-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  max-width: 380px;
  margin: 60px auto;
}

.msg { padding: 10px 14px; border-radius: 8px; font-size: 14px; margin-bottom: 12px; }
.msg.error { background: #fee2e2; color: var(--danger); }
.msg.success { background: #dcfce7; color: var(--success); }

table { width: 100%; border-collapse: collapse; margin-top: 14px; }
th, td { text-align: left; padding: 10px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--muted); font-weight: 600; }

.badge { padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.pending { background: #fef3c7; color: var(--warning); }
.badge.delivered { background: #dcfce7; color: var(--success); }
.badge.cancelled { background: #fee2e2; color: var(--danger); }

.admin-layout { display: flex; min-height: calc(100vh - 60px); }
.admin-sidebar { width: 200px; background: var(--card-bg); border-right: 1px solid var(--border); padding: 20px 0; }
.admin-sidebar a { display: block; padding: 10px 20px; color: var(--text); text-decoration: none; font-size: 14px; }
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--bg); color: var(--primary); }
.admin-content { flex: 1; padding: 24px; }

.cart-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--border); }
.total-row { display: flex; justify-content: space-between; font-size: 18px; font-weight: 700; margin-top: 16px; }