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

:root {
  --primary: #007bff;
  --primary-dark: #0056b3;
  --error: #dc3545;
  --light-bg: #f5f5f5;
  --dark-bg: #1a1a1a;
  --border: #ddd;
  --text: #333;
  --text-light: #666;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #5be3f5 0%, #1757ce 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-container {
  width: 100%;
  max-width: 400px;
  padding: 20px;
}

.login-card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  padding: 40px;
}

.login-header {
  text-align: center;
  margin-bottom: 40px;
}

.login-icon {
  font-size: 48px;
  display: block;
  margin-bottom: 16px;
}

.login-header h1 {
  font-size: 28px;
  color: var(--text);
  margin: 0;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-weight: 600;
  color: var(--text);
  font-size: 14px;
}

.form-group input {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 16px;
  transition: all 0.3s ease;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

.error-message {
  padding: 12px;
  background: #f8d7da;
  color: var(--error);
  border: 1px solid #f5c6cb;
  border-radius: 6px;
  font-size: 14px;
  display: none;
}

.error-message.show {
  display: block;
}

.btn-login {
  padding: 12px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 10px;
}

.btn-login:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.btn-login:active {
  transform: translateY(0);
}

.btn-login:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.login-footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.login-footer p {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.demo-creds {
  list-style: none;
  font-size: 12px;
  color: var(--text-light);
  line-height: 1.8;
}

@media (prefers-color-scheme: dark) {
  .login-card {
    background: var(--dark-bg);
    color: white;
  }

  .login-header h1 {
    color: white;
  }

  .form-group label {
    color: white;
  }

  .form-group input {
    background: #2a2a2a;
    border-color: #444;
    color: white;
  }

  .form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
  }

  .login-footer {
    border-top-color: #444;
  }
}