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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-container {
  width: 100%;
  max-width: 420px;
}

.login-box {
  background: white;
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.logo {
  text-align: center;
  margin-bottom: 32px;
}

.logo h1 {
  color: #1a202c;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.logo p {
  color: #718096;
  font-size: 14px;
}

.login-description {
  background: #f8f9fa;
  border-left: 3px solid #667eea;
  padding: 15px;
  margin: 24px 0;
  border-radius: 4px;
}

.login-description p {
  color: #495057;
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
  text-align: left;
}

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

.form-group label {
  display: block;
  color: #4a5568;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
}

.form-group input {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 16px;
  transition: all 0.2s;
  background: #f7fafc;
}

.form-group input:focus {
  outline: none;
  border-color: #667eea;
  background: white;
}

.btn-primary {
  width: 100%;
  padding: 14px;
  background: #667eea;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 8px;
}

.btn-primary:hover {
  background: #5568d3;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

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

.btn-primary:disabled {
  background: #cbd5e0;
  cursor: not-allowed;
  transform: none;
}

.error-message {
  background: #fed7d7;
  color: #c53030;
  padding: 12px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
  border: 1px solid #fc8181;
}

.loading {
  display: inline-block;
}

@media (max-width: 480px) {
  .login-box {
    padding: 30px 24px;
  }
  
  .logo h1 {
    font-size: 24px;
  }
}