body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  margin: 0;
}
.login-container {
  background: white;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
  max-width: 400px;
  width: 100%;
}
h1 { color: #333; font-size: 28px; margin-bottom: 10px; text-align: center; }
.subtitle { color: #666; text-align: center; margin-bottom: 30px; font-size: 14px; }
.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 8px; color: #333; font-weight: 500; font-size: 14px; }
input[type="text"], input[type="password"] { width: 100%; padding: 12px 16px; border: 2px solid #e1e4e8; border-radius: 6px; font-size: 14px; }
button { width: 100%; padding: 14px; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; border: none; border-radius: 6px; font-size: 16px; font-weight: 600; cursor: pointer; }
.info-box { background: #f6f8fa; padding: 15px; border-radius: 6px; margin-top: 20px; font-size: 12px; color: #666; }
.error-container { background: white; padding: 40px; border-radius: 12px; box-shadow: 0 10px 40px rgba(0,0,0,0.2); max-width: 400px; text-align: center; }