body {
  width: 100vw;
  height: 100vh;
  display: table-cell;
  vertical-align: middle;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#login-frame {
  width: 630px;
  margin: auto;
  background: white;
  border-radius: 16px;
  padding: 50px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.login-header {
  margin-bottom: 2rem;
}

.login-logo {
  max-width: 120px;
  height: auto;
  border-radius: 16px;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.login-title {
  color: #2d3748;
  font-weight: 600;
  margin-bottom: 0.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.login-subtitle {
  color: #718096;
  margin: 0;
}

#login-form {
  margin-top: 1.5rem;
}

#login-form .form-control {
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 16px;
  transition: all 0.3s ease;
  background: #f8fafc;
}

#login-form .form-control:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  background: white;
  transform: translateY(-1px);
}

#login-form .form-label {
  font-weight: 600;
  color: #4a5568;
  margin-bottom: 8px;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  border-radius: 12px;
  padding: 12px 24px;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
  background: linear-gradient(135deg, #5a6fd8 0%, #6b4190 100%);
}

.forgot-password {
  color: #667eea;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
}

.forgot-password:hover {
  color: #5a6fd8;
  text-decoration: underline;
}

.alert {
  border-radius: 12px;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

@media (max-width: 640px) {
  #login-frame {
    width: 95%;
    margin: 20px auto;
    padding: 30px 25px;
  }
  
  .login-logo {
    max-width: 100px;
  }
  
  body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    height: auto;
  }
}