:root {
  --primary-color: #3b82f6;
  --secondary-color: #2563eb;
  --accent-color: #1d4ed8;
  --text-color: #1f2937;
  --bg-color: #f9fafb;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
}

/* Đổi .dark-mode thành .dark */
.dark {
  --text-color: #f9fafb;
  --bg-color: #111827;
  --card-bg: #1f2937;
  --border-color: #374151;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color 0.3s, color 0.3s;
}

/* Khi có class .dark trên html hoặc body, đổi biến màu cho body */
.dark body {
  background-color: var(--bg-color);
  color: var(--text-color);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

/* Header styles */
.header {
  background-color: var(--card-bg);
  color: var(--text-color);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-link:hover {
  color: var(--primary-color);
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.btn {
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  display: inline-block;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
}

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

.btn-outline {
  background-color: transparent;
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

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

/* Card styles */
.card,
.stat-card {
  background-color: var(--card-bg);
  color: var(--text-color);
}

.card {
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-header {
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
}

/* Form styles */
.form-group {
  margin-bottom: 1rem;
}

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

.form-input {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 0.375rem;
  background-color: var(--card-bg);
  color: var(--text-color);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.password-input {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
}

/* Dashboard stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background-color: var(--card-bg);
  border-radius: 0.5rem;
  padding: 1.5rem;
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: #6b7280;
}

/* Table styles */
.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--card-bg);
  color: var(--text-color);
}

.table th {
  font-weight: 600;
}

/* Notification badge */
.notification-badge {
  position: relative;
}

.badge {
  position: absolute;
  top: -0.5rem;
  right: -0.5rem;
  background-color: var(--danger-color);
  color: white;
  border-radius: 50%;
  width: 1.25rem;
  height: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

/* Quick action buttons (nếu dùng màu nền riêng, nên dùng biến hoặc thêm class dark) */
.quick-action {
  background-color: var(--card-bg);
  color: var(--text-color);
}

/* Responsive design */
@media (max-width: 768px) {
  .nav {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav-links {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .user-menu {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* Dark mode toggle */
.theme-toggle {
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
  font-size: 1.25rem;
}

/* Animation for notifications */
@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.notification {
  position: fixed;
  top: 1rem;
  right: 1rem;
  padding: 1rem;
  border-radius: 0.375rem;
  color: white;
  animation: slideIn 0.3s ease-out;
  z-index: 1000;
}

.notification.success {
  background-color: var(--success-color);
}

.notification.error {
  background-color: var(--danger-color);
}

.notification.warning {
  background-color: var(--warning-color);
}

.notification.info {
  background-color: var(--info-color);
}
/* Thêm các style mới cho các trang mới */

/* FAQ animation */
.faq-content {
  transition: all 0.3s ease;
}

/* Contact form */
.contact-info-item {
  transition: transform 0.2s ease;
}

.contact-info-item:hover {
  transform: translateX(5px);
}

/* Responsive design */
@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .faq-item {
    padding: 1rem;
  }
}

/* Loading animation */
.loading-spinner {
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Button hover effects */
.btn-hover {
  transition: all 0.3s ease;
}

.btn-hover:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

/* Form styles */
.form-input:focus {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Card hover effects */
.card-hover {
  transition: all 0.3s ease;
}

.card-hover:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Notification styles */
.notification {
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Mobile menu */
.mobile-menu {
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    transform: translateY(-10px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* Theme toggle */
.theme-toggle {
  transition: all 0.3s ease;
}

.theme-toggle:hover {
  transform: rotate(30deg);
}
/* Thêm vào file style.css hoặc trong <style> */
@keyframes fade-in { from { opacity: 0; transform: scale(0.95);} to { opacity: 1; transform: scale(1);} }
.animate-fade-in { animation: fade-in 0.2s ease; }