/* Reset และ Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f5f5f5;
  color: #333;
  /* line-height: 1.6; */
}

.footer {
  width: 50%;
  padding-left: 20px;
  text-align: center;
  margin: auto;
}

/* Navbar */
.navbar {
  /* background-color: #407aa3; */
  background: linear-gradient(135deg, #3f8ce0 0%, #2e83de 100%);
  color: white;
  margin-left: 3px;
  margin-right: 3px;
  border-radius: 8px;
  padding: 1rem 0;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1rem;
}

.nav-brand {
  font-size: 1.8rem;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-user {
  padding-right: 20px;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: relative;
}

.dropdown-content {
  color: white;
}

/* Layout */
.container {
  display: flex;
  max-width: 1400px;
  margin: 2rem auto;
  gap: 2rem;
  padding: 0 1rem;
}

/* Sidebar */
.sidebar {
  width: 200px;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 1.5rem 0;
}

.sidebar-menu {
  list-style: none;
}

.sidebar-menu li {
  margin-bottom: 0.5rem;
}

.sidebar-menu a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  color: #333;
  text-decoration: none;
  transition: all 0.3s;
}

.sidebar-menu a:hover {
  background-color: #f0f0f0;
  color: #2c3e50;
}

.sidebar-menu .active a {
  background-color: #3a68b6;
  color: white;
  border-left: 4px solid #3498db;
}

/* Main Content */
.main-content {
  flex: 1;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 2rem;
}

.welcome-section {
  background: linear-gradient(135deg, #6891e2 0%, #4d60dc 100%);
  color: white;
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

.page-header {
  background: linear-gradient(135deg, #6891e2 0%, #4d60dc 100%);
  color: white;
  padding: 2rem;
  border-radius: 8px;
  margin-bottom: 2rem;
}

.flex-container {
  display: flex;
  align-items: flex-start;
  gap: 15px;
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.card {
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: transform 0.3s;
  display: flex;
}

.card:hover {
  transform: translateY(-5px);
}

.card-icon {
  width: 80px;
  background-color: #3498db;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.card-content {
  padding: 1.0rem;
  flex: 1;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  text-decoration: none;
  transition: background-color 0.3s;
}

.btn-primary {
  background-color: #3498db;
  color: white;
}

.btn-primary:hover {
  background-color: #2980b9;
}

.btn-secondary {
  background-color: #95a5a6;
  color: white;
}

.btn-secondary:hover {
  background-color: #7f8c8d;
}

.btn-warning {
  background-color: #e2980f;
  color: white;
}

.btn-warning:hover {
  background-color: #c6850e;
}

.center-div {
  width: 60%;
  margin-left: 20%;
  margin-right: 20%;
}

/* Form Styles */
.form-group {
  margin-bottom: 1.0rem;
}

.form-group label {
  display: block;
  color: #616398;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group button {
  padding-top: 15px;
  padding-bottom: 14px;
  padding-left: 25px;
  padding-right: 25px;
}

.form-control {
  width: 100%;
  min-width: 500px;
  padding: 0.8rem;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
}

/* Alerts */
.alert {
  padding: 1rem;
  border-radius: 4px;
  margin-bottom: 1.5rem;
}

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

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

/* Badges */
.badge {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 600;
}

.badge-success {
  background-color: #d4edda;
  color: #155724;
}

.badge-danger {
  background-color: #f8d7da;
  color: #721c24;
}

/* Quick Actions */
.quick-actions {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #eee;
}

.action-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.action-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 120px;
  height: 120px;
  background-color: white;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  text-decoration: none;
  color: #333;
  transition: all 0.3s;
}

.action-btn:hover {
  border-color: #3498db;
  transform: translateY(-3px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.action-btn i {
  font-size: 2rem;
  margin-bottom: 0.5rem;
  color: #3498db;
}

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

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.table th,
.table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid #ddd;
}

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

/* Responsive */
@media (max-width: 768px) {
  .container {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

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