/* Global Styles - Modernized */
:root {
  --primary-color: #4361ee;
  --secondary-color: #3f37c9;
  --accent-color: #4895ef;
  --danger-color: #f72585;
  --success-color: #4cc9f0;
  --dark-color: #1b263b;
  --light-color: #f8f9fa;
  --gray-color: #6c757d;
  --border-radius: 8px;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background-color: var(--light-color);
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: var(--transition);
}

a:hover {
  color: var(--secondary-color);
}

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header */
header {
  background-color: var(--dark-color);
  color: white;
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--box-shadow);
}

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

nav ul {
  display: flex;
  list-style: none;
  gap: 1.5rem;
}

nav ul li a {
  color: white;
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
}

nav ul li a:hover {
  color: var(--accent-color);
  text-decoration: none;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-color);
  transition: var(--transition);
}

nav ul li a:hover::after {
  width: 100%;
}

/* Main Content */
main {
  padding: 2rem 0;
  min-height: calc(100vh - 160px);
}

/* Footer */
footer {
  background-color: var(--dark-color);
  color: white;
  text-align: center;
  padding: 1.5rem 0;
  margin-top: 2rem;
}

/* Cards */
.card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-header {
  padding: 1.25rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.card-body {
  padding: 1.25rem;
}

/* Dashboard */
.dashboard-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.stat-card {
  background: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.stat-card h3 {
  color: var(--gray-color);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.stat-card p {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary-color);
}

/* Products */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.product-card {
  border: 1px solid rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.product-card:hover {
  border-color: var(--primary-color);
}

.product-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.product-info {
  padding: 1.25rem;
}

.product-title {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--dark-color);
}

.product-price {
  font-weight: 700;
  color: var(--primary-color);
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.product-meta {
  display: flex;
  justify-content: space-between;
  color: var(--gray-color);
  font-size: 0.85rem;
}

/* Tables */
.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  background: white;
  box-shadow: var(--box-shadow);
  border-radius: var(--border-radius);
  overflow: hidden;
}

th, td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

th {
  background-color: var(--dark-color);
  color: white;
  font-weight: 600;
}

tr:last-child td {
  border-bottom: none;
}

tr:hover {
  background-color: rgba(67, 97, 238, 0.05);
}

/* Forms */
.form-container {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--dark-color);
}

.form-control {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--border-radius);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1rem;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background-color: var(--secondary-color);
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
}

.btn-danger:hover {
  background-color: #d1145a;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

/* Login & Auth */
.auth-container {
  max-width: 400px;
  margin: 4rem auto;
  background: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.auth-title {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--dark-color);
}

/* Messages & Alerts */
.alert {
  padding: 1rem;
  border-radius: var(--border-radius);
  margin-bottom: 1.5rem;
}

.alert-danger {
  background-color: #fce8e8;
  color: var(--danger-color);
  border-left: 4px solid var(--danger-color);
}

.alert-success {
  background-color: #e8faf0;
  color: #2e7d32;
  border-left: 4px solid #2e7d32;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Responsive */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  nav ul {
    gap: 1rem;
  }
  
  .dashboard-stats {
    grid-template-columns: 1fr;
  }
  
  .product-grid {
    grid-template-columns: 1fr;
  }
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-fade {
  animation: fadeIn 0.5s ease-out forwards;
}