* {
  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;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.container {
  background: white;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  padding: 40px;
  width: 100%;
  max-width: 800px;
}

h1 {
  color: #333;
  text-align: center;
  margin-bottom: 30px;
  font-size: 2rem;
}

h2 {
  color: #555;
  margin-bottom: 20px;
  font-size: 1.5rem;
}

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

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #555;
  font-weight: 600;
}

.form-group input {
  width: 100%;
  padding: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 1rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.btn {
  display: inline-block;
  padding: 15px 30px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
  background: #6c757d;
  color: white;
}

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

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

.error-message {
  color: #dc3545;
  font-size: 0.9rem;
  margin-top: 10px;
  display: none;
}

/* Test Page Styles */
.test-container {
  max-width: 900px;
}

.progress-bar {
  background: #e0e0e0;
  border-radius: 10px;
  height: 20px;
  margin-bottom: 30px;
  overflow: hidden;
}

.progress-fill {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  height: 100%;
  border-radius: 10px;
  transition: width 0.3s ease;
}

.progress-text {
  text-align: center;
  color: #666;
  margin-bottom: 10px;
  font-size: 0.9rem;
}

.question-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
  color: #666;
  font-size: 0.9rem;
}

.question-type {
  background: #667eea;
  color: white;
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.85rem;
}

.level-badge {
  background: #28a745;
  color: white;
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.85rem;
}

.passage {
  background: #f8f9fa;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 20px;
  border-left: 4px solid #667eea;
  line-height: 1.8;
  font-size: 1rem;
}

.question-text {
  font-size: 1.2rem;
  color: #333;
  margin-bottom: 25px;
  line-height: 1.6;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.option {
  display: flex;
  align-items: center;
  padding: 15px 20px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s;
}

.option:hover {
  border-color: #667eea;
  background: #f8f9ff;
}

.option.selected {
  border-color: #667eea;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
}

.option input {
  display: none;
}

.option-label {
  display: flex;
  align-items: center;
  width: 100%;
  cursor: pointer;
}

.option-number {
  width: 35px;
  height: 35px;
  border-radius: 50%;
  background: #e0e0e0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 15px;
  font-weight: 600;
  color: #666;
  transition: all 0.3s;
}

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

.option-text {
  font-size: 1rem;
  color: #333;
}

.test-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 30px;
  gap: 15px;
}

.test-navigation .btn {
  flex: 1;
  max-width: 200px;
}

/* Result Page Styles */
.result-container {
  text-align: center;
}

.result-score {
  font-size: 4rem;
  font-weight: 700;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}

.result-level {
  font-size: 2rem;
  color: #333;
  margin-bottom: 30px;
}

.result-level span {
  color: #667eea;
  font-weight: 700;
}

.result-details {
  background: #f8f9fa;
  padding: 30px;
  border-radius: 15px;
  margin-bottom: 30px;
}

.result-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid #e0e0e0;
}

.result-item:last-child {
  border-bottom: none;
}

.result-item-label {
  color: #666;
}

.result-item-value {
  font-weight: 600;
  color: #333;
}

/* Admin Page Styles */
.admin-container {
  max-width: 1200px;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.admin-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
  border-bottom: 2px solid #e0e0e0;
  padding-bottom: 10px;
}

.admin-tab {
  padding: 10px 20px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 1rem;
  color: #666;
  border-bottom: 3px solid transparent;
  margin-bottom: -12px;
  transition: all 0.3s;
}

.admin-tab.active {
  color: #667eea;
  border-bottom-color: #667eea;
}

.admin-tab:hover {
  color: #667eea;
}

.table-container {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid #e0e0e0;
}

th {
  background: #f8f9fa;
  font-weight: 600;
  color: #555;
}

tr:hover {
  background: #f8f9ff;
}

.status-badge {
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.status-pending {
  background: #fff3cd;
  color: #856404;
}

.status-completed {
  background: #d4edda;
  color: #155724;
}

.action-btn {
  padding: 8px 15px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.85rem;
  margin-right: 5px;
  transition: opacity 0.3s;
}

.action-btn:hover {
  opacity: 0.8;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal.active {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: 20px;
  padding: 40px;
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #666;
}

.modal-close:hover {
  color: #333;
}

/* Timer */
.timer {
  background: #f8f9fa;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 1.2rem;
  font-weight: 600;
  color: #333;
}

.timer.warning {
  background: #fff3cd;
  color: #856404;
}

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

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 25px;
    margin: 10px;
  }

  h1 {
    font-size: 1.5rem;
  }

  .test-navigation {
    flex-direction: column;
  }

  .test-navigation .btn {
    max-width: 100%;
  }

  .admin-header {
    flex-direction: column;
    gap: 15px;
  }

  table {
    font-size: 0.85rem;
  }

  th, td {
    padding: 10px;
  }
}

/* Loading Spinner */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 50px;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid #e0e0e0;
  border-top-color: #667eea;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  padding: 15px 25px;
  background: #333;
  color: white;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s;
  z-index: 2000;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.success {
  background: #28a745;
}

.toast.error {
  background: #dc3545;
}