:root {
  --vhu-red: #dc3545;
  --vhu-dark: #151515;
  --vhu-muted: #6c757d;
  --vhu-light: #f8f9fa;
  --vhu-border: #e9ecef;
}

* {
  box-sizing: border-box;
}

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #ffffff;
  color: var(--vhu-dark);
}

a {
  text-decoration: none;
}

.navbar {
  min-height: 72px;
}

.navbar-brand {
  font-size: 1.6rem;
  letter-spacing: -0.5px;
}

.nav-link {
  font-weight: 600;
  color: #333 !important;
  margin: 0 8px;
  position: relative;
}

.nav-link:hover {
  color: var(--vhu-red) !important;
}

.nav-link::after {
  content: "";
  width: 0;
  height: 2px;
  background: var(--vhu-red);
  position: absolute;
  left: 8px;
  bottom: 4px;
  transition: 0.25s ease;
}

.nav-link:hover::after {
  width: calc(100% - 16px);
}

.hero-section {
  background:
    radial-gradient(circle at top left, rgba(220, 53, 69, 0.12), transparent 35%),
    linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
  padding: 40px 0 70px;
}

.min-vh-75 {
  min-height: 75vh;
}

.hero-card {
  border-radius: 28px;
  padding: 14px;
  background: #ffffff;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.12);
}

.hero-card img {
  width: 100%;
  height: 520px;
  object-fit: cover;
}

.btn {
  border-radius: 999px;
  font-weight: 700;
}

.btn-danger {
  background: var(--vhu-red);
  border-color: var(--vhu-red);
}

.btn-danger:hover {
  background: #bb2d3b;
  border-color: #bb2d3b;
}

.btn-outline-danger {
  border-color: var(--vhu-red);
  color: var(--vhu-red);
}

.btn-outline-danger:hover {
  background: var(--vhu-red);
  border-color: var(--vhu-red);
  color: #ffffff;
}

.badge {
  border-radius: 999px;
  font-weight: 700;
}

.product-card {
  border-radius: 22px;
  overflow: hidden;
  transition: 0.25s ease;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.12) !important;
}

.product-img {
  height: 280px;
  object-fit: cover;
  background: #f1f1f1;
}

.card-title {
  letter-spacing: -0.3px;
}

.product-detail-image {
  border-radius: 28px;
  padding: 14px;
  background: #ffffff;
}

.product-detail-image img {
  width: 100%;
  height: 560px;
  object-fit: cover;
}

.review-card {
  transition: 0.25s ease;
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 35px rgba(0, 0, 0, 0.08);
}

.form-control {
  border-radius: 14px;
  border: 1px solid var(--vhu-border);
  padding: 12px 14px;
}

.form-control:focus {
  border-color: var(--vhu-red);
  box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.12);
}

.card {
  border-radius: 24px;
}

.list-group {
  border-radius: 20px;
}

.list-group-item {
  padding: 16px 18px;
  border-color: var(--vhu-border);
}

.list-group-item:hover {
  background: #fff5f6;
}

.footer-link {
  color: rgba(255, 255, 255, 0.65);
  display: inline-block;
  margin: 4px 0;
}

.footer-link:hover {
  color: #ffffff;
}

.bg-danger-subtle {
  background: rgba(220, 53, 69, 0.12) !important;
}

.text-danger {
  color: var(--vhu-red) !important;
}

.shadow-sm {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06) !important;
}

.rounded-4 {
  border-radius: 24px !important;
}

.auth-section {
  min-height: calc(100vh - 72px);
  background:
    radial-gradient(circle at top right, rgba(220, 53, 69, 0.14), transparent 35%),
    linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
  display: flex;
  align-items: center;
  padding: 70px 0;
}

.auth-card {
  max-width: 460px;
  margin: 0 auto;
  border-radius: 26px;
  background: #ffffff;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.1);
}

.admin-sidebar {
  border-radius: 24px;
  background: #ffffff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.admin-sidebar a {
  display: block;
  padding: 13px 16px;
  color: #333333;
  border-radius: 14px;
  font-weight: 700;
}

.admin-sidebar a:hover,
.admin-sidebar a.active {
  background: #fff0f1;
  color: var(--vhu-red);
}

.table {
  vertical-align: middle;
}

.table thead th {
  color: var(--vhu-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

@media (max-width: 991px) {
  .hero-card img,
  .product-detail-image img {
    height: 380px;
  }

  .min-vh-75 {
    min-height: auto;
  }

  .hero-section {
    padding-top: 50px;
  }
}

@media (max-width: 575px) {
  .display-4 {
    font-size: 2.4rem;
  }

  .hero-card img,
  .product-detail-image img,
  .product-img {
    height: 260px;
  }

  .navbar-brand {
    font-size: 1.35rem;
  }
}