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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: #f5f5f5;
  color: #333;
}

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

.navbar {
  background: #2c3e50;
  color: white;
  padding: 1rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: bold;
}

.section {
  margin-top: 2rem;
}

.auth-container {
  max-width: 400px;
  margin: 3rem auto;
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.auth-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tab-btn {
  flex: 1;
  padding: 0.75rem;
  border: none;
  background: #ecf0f1;
  cursor: pointer;
  font-size: 1rem;
  border-radius: 4px;
  transition: background 0.2s;
}

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

.tab-btn:hover {
  opacity: 0.9;
}

.auth-form h2 {
  margin-bottom: 1rem;
  color: #2c3e50;
}

.auth-form input {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.2s;
}

.btn-primary {
  background: #3498db;
  color: white;
  width: 100%;
}

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

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

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

.btn-danger {
  background: #e74c3c;
  color: white;
  margin-top: 1rem;
}

.btn-danger:hover {
  background: #c0392b;
}

.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
  background: white;
  padding: 1rem;
  border-radius: 8px;
}

.tab-content {
  display: none;
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.tab-content.active {
  display: block;
}

.filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.filters input,
.filters select {
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.properties-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.property-card {
  background: white;
  border: 1px solid #ddd;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
}

.property-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.property-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: #ecf0f1;
}

.property-details {
  padding: 1rem;
}

.property-title {
  font-size: 1.1rem;
  font-weight: bold;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.property-price {
  font-size: 1.3rem;
  color: #27ae60;
  font-weight: bold;
  margin-bottom: 0.5rem;
}

.property-location {
  color: #7f8c8d;
  margin-bottom: 0.5rem;
}

.property-specs {
  display: flex;
  gap: 1rem;
  color: #7f8c8d;
  font-size: 0.9rem;
}

.alerts-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.alert-card {
  background: white;
  border: 1px solid #ddd;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.alert-info h3 {
  color: #2c3e50;
  margin-bottom: 0.5rem;
}

.alert-criteria {
  color: #7f8c8d;
  font-size: 0.9rem;
}

.alert-actions {
  display: flex;
  gap: 0.5rem;
}

.alert-actions button {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal-content {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content h3 {
  margin-bottom: 1.5rem;
  color: #2c3e50;
}

.modal-content input,
.modal-content select {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.checkbox-group {
  margin-bottom: 1rem;
}

.checkbox-group label {
  display: block;
  margin-bottom: 0.5rem;
}

.modal-actions {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.modal-actions button {
  flex: 1;
}

.profile-form {
  max-width: 500px;
}

.profile-form input {
  width: 100%;
  padding: 0.75rem;
  margin-bottom: 1rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.message {
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 4px;
}

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

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