:root {
  --primary-color: #2c3e50;
  --secondary-color: #3498db;
  --accent-color: #e74c3c;
  --light-gray: #f8f9fa;
  --dark-gray: #6c757d;
  --success-color: #27ae60;
}

body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0;
  padding: 20px;
}

.login-card {
  background: white;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  padding: 40px;
  width: 100%;
  max-width: 450px;
  text-align: center;
  transition: all 0.3s ease;
}

.login-card:hover {
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.login-card h2 {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 5px;
  font-size: 1.8rem;
}

.subtitle {
  color: var(--dark-gray);
  margin-bottom: 30px;
  font-size: 1rem;
  font-weight: 400;
}

.form-label {
  font-weight: 500;
  color: var(--primary-color);
  display: block;
  text-align: left;
  margin-bottom: 8px;
  font-size: 0.95rem;
}

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

.input-group-text {
  background-color: #f1f5f9;
  border: none;
  color: var(--primary-color);
}

.form-control {
  border: 1px solid #e2e8f0;
  padding: 12px 15px;
  border-radius: 8px !important;
  transition: all 0.3s;
}

.form-control:focus {
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 0.25rem rgba(52, 152, 219, 0.25);
}

.toggle-password {
  cursor: pointer;
  background-color: #f1f5f9 !important;
  border: none !important;
  color: var(--primary-color);
}

.btn-login {
  background-color: var(--secondary-color);
  color: white;
  border: none;
  padding: 12px;
  font-weight: 600;
  border-radius: 8px;
  margin-top: 10px;
  transition: all 0.3s;
}

.btn-login:hover {
  background-color: #2980b9;
  transform: translateY(-2px);
}

.alert-danger {
  background-color: #fee2e2;
  border-color: #fecaca;
  color: #b91c1c;
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 20px;
}

/* Efectos para los íconos */
.input-group-text i {
  transition: transform 0.3s;
}

.input-group:focus-within .input-group-text i {
  color: var(--secondary-color);
  transform: scale(1.1);
}

/* Responsive */
@media (max-width: 576px) {
  .login-card {
    padding: 30px 20px;
  }
  
  .login-card h2 {
    font-size: 1.5rem;
  }
}