:root {
  --primary-color: #007bff;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #17a2b8;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f8f9fa;
}

.bg-gradient {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero-section {
  min-height: 60vh;
  display: flex;
  align-items: center;
}

.card {
  border: none;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.btn {
  border-radius: 25px;
  padding: 10px 25px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

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

.prediction-btn {
  border-radius: 10px;
  padding: 15px;
  font-size: 1.1rem;
  font-weight: bold;
  margin: 5px;
  transition: all 0.3s ease;
}

.prediction-btn:hover {
  transform: scale(1.05);
}

.chart-container {
  background: white;
  border-radius: 15px;
  padding: 20px;
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
}

.balance-card {
  background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
  color: white;
  border-radius: 15px;
}

.admin-card {
  background: linear-gradient(135deg, #dc3545 0%, #fd7e14 100%);
  color: white;
  border-radius: 15px;
}

.navbar-brand {
  font-size: 1.5rem;
}

.table {
  background: white;
  border-radius: 10px;
  overflow: hidden;
}

.form-control {
  border-radius: 10px;
  border: 2px solid #e9ecef;
  padding: 12px 15px;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.alert {
  border-radius: 10px;
  border: none;
}

@media (max-width: 768px) {
  .hero-section {
    min-height: 50vh;
  }

  .display-4 {
    font-size: 2rem;
  }

  .prediction-btn {
    font-size: 1rem;
    padding: 12px;
  }
}