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

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* Login & Register Forms */
.auth-container {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.auth-card {
  background: white;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  padding: 40px;
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.auth-card .logo {
  font-size: 2.5rem;
  font-weight: bold;
  color: #667eea;
  margin-bottom: 10px;
}

.auth-card .subtitle {
  color: #666;
  margin-bottom: 30px;
}

.form-group {
  margin-bottom: 20px;
  text-align: left;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  color: #333;
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 2px solid #e1e5e9;
  border-radius: 10px;
  font-size: 16px;
  transition: border-color 0.3s;
}

.form-control:focus {
  outline: none;
  border-color: #667eea;
}

.btn {
  padding: 12px 30px;
  border: none;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  width: 100%;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
  background: #f8f9fa;
  color: #666;
  border: 2px solid #e1e5e9;
}

.btn-secondary:hover {
  background: #e9ecef;
}

/* Dashboard */
.dashboard {
  background: white;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.dashboard-header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 30px;
  text-align: center;
}

.dashboard-header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.dashboard-header p {
  opacity: 0.9;
  font-size: 1.1rem;
}

.dashboard-nav {
  background: #f8f9fa;
  padding: 20px;
  border-bottom: 1px solid #e1e5e9;
}

.nav-menu {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-item {
  background: white;
  border-radius: 10px;
  padding: 15px 20px;
  text-decoration: none;
  color: #333;
  font-weight: 500;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: all 0.3s;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
  color: #667eea;
}

.nav-item i {
  font-size: 1.2rem;
}

.dashboard-content {
  padding: 30px;
}

/* Cards */
.card {
  background: white;
  border-radius: 15px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  padding: 25px;
  margin-bottom: 20px;
}

.card-header {
  border-bottom: 1px solid #e1e5e9;
  padding-bottom: 15px;
  margin-bottom: 20px;
}

.card-title {
  font-size: 1.5rem;
  color: #333;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title i {
  color: #667eea;
}

/* Tables */
.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

.table th,
.table td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #e1e5e9;
}

.table th {
  background: #f8f9fa;
  font-weight: 600;
  color: #333;
}

.table tr:hover {
  background: #f8f9fa;
}

/* Buttons */
.btn-sm {
  padding: 8px 15px;
  font-size: 14px;
}

.btn-success {
  background: #28a745;
  color: white;
}

.btn-warning {
  background: #ffc107;
  color: #212529;
}

.btn-danger {
  background: #dc3545;
  color: white;
}

.btn-info {
  background: #17a2b8;
  color: white;
}

/* Stats Cards */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 30px;
}

.stat-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: 15px;
  padding: 25px;
  text-align: center;
}

.stat-card i {
  font-size: 3rem;
  margin-bottom: 15px;
  opacity: 0.8;
}

.stat-card h3 {
  font-size: 2rem;
  margin-bottom: 5px;
}

.stat-card p {
  opacity: 0.9;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    flex-direction: column;
    align-items: center;
  }

  .nav-item {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* Alerts */
.alert {
  padding: 15px;
  border-radius: 10px;
  margin-bottom: 20px;
}

.alert-success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.alert-danger {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.alert-info {
  background: #d1ecf1;
  color: #0c5460;
  border: 1px solid #bee5eb;
}