* { box-sizing: border-box; }
body { margin: 0; font-family: Arial, sans-serif; background: #f4f6fa; color: #222; }
header { background: #fff; color: #222; padding: 10px 24px; display: flex; align-items: center; gap: 24px;
  border-bottom: 3px solid #398d9e; box-shadow: 0 1px 4px rgba(0,0,0,.08); }
header .logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
header .logo img { height: 48px; display: block; }
header .logo span { font-size: 18px; color: #555; border-left: 1px solid #ccc; padding-left: 12px; }
header nav { display: flex; gap: 16px; flex: 1; }
header a { color: #398d9e; font-weight: bold; }
header .user { display: flex; gap: 12px; align-items: center; }
main { max-width: 960px; margin: 24px auto; padding: 0 16px; }
h1 { margin-top: 0; }
.card { background: #fff; border-radius: 8px; padding: 20px; box-shadow: 0 1px 4px rgba(0,0,0,.1); }
.login-box { max-width: 360px; margin: 60px auto; }
.login-logo { display: block; width: 100%; max-width: 280px; margin: 4px auto 20px; }
label { display: block; margin: 12px 0 4px; }
input[type=text], input[type=password] {
  width: 100%; padding: 8px; border: 1px solid #bbb; border-radius: 4px; font-size: 15px;
}
button { background: #398d9e; color: #fff; border: 0; border-radius: 4px; padding: 8px 16px; font-size: 15px; cursor: pointer; }
button:disabled { background: #999; cursor: default; }
button.secondary { background: #e0e4ee; color: #222; }
.error { color: #d9342b; margin-top: 12px; }
.success { color: #1c8a3c; font-weight: bold; margin-top: 12px; }
.hidden { display: none !important; }
.filters { display: flex; gap: 12px; margin-bottom: 16px; }
.filters > * { flex: 1; }
.products { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.product-card { background: #fff; border-radius: 8px; padding: 16px; box-shadow: 0 1px 4px rgba(0,0,0,.1); }
.product-name { font-size: 18px; font-weight: bold; }
.product-category { color: #777; font-size: 13px; margin: 4px 0 8px; }
.product-price { font-size: 16px; margin-bottom: 12px; }
table { border-collapse: collapse; width: 100%; background: #fff; }
th, td { border: 1px solid #ddd; padding: 8px; text-align: left; }
.section { margin-bottom: 24px; }
.checkbox-label { display: inline-flex; align-items: center; gap: 6px; margin-right: 16px; }
.toast { position: fixed; right: 24px; bottom: 24px; background: #222; color: #fff; padding: 12px 16px; border-radius: 6px; }
.spinner { color: #777; font-style: italic; }