body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.container {
  background: white;
  padding: 60px 40px;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-width: 800px;
  width: 90%;
  margin: 20px;
}

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

h1 {
  color: #1a202c;
  margin: 0 0 10px 0;
  font-size: 2.5rem;
  font-weight: 700;
}

.subtitle {
  color: #718096;
  font-size: 1.1rem;
  margin: 0;
}

.proxy-form {
  margin-top: 40px;
}

.input-group {
  display: flex;
  gap: 12px;
  margin-bottom: 30px;
}

#githubUrl {
  flex: 1;
  padding: 16px 20px;
  font-size: 1rem;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  outline: none;
  transition: all 0.3s ease;
  font-family: inherit;
}

#githubUrl:focus {
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

#submitBtn {
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
  font-family: inherit;
}

#submitBtn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

#submitBtn:active {
  transform: translateY(0);
}

.examples {
  background: #f7fafc;
  padding: 24px;
  border-radius: 8px;
  border-left: 4px solid #667eea;
}

.examples-title {
  margin: 0 0 16px 0;
  font-weight: 600;
  color: #2d3748;
  font-size: 1rem;
}

.examples ul {
  margin: 0;
  padding-left: 24px;
}

.examples li {
  margin-bottom: 12px;
  line-height: 1.8;
  color: #4a5568;
}

.examples code {
  background: #edf2f7;
  color: #e53e3e;
  padding: 4px 8px;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.9em;
  word-break: break-all;
  display: inline-block;
  margin-top: 4px;
}

.examples strong {
  color: #2d3748;
}

@media (max-width: 768px) {
  .container {
    padding: 40px 24px;
    margin: 10px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .input-group {
    flex-direction: column;
  }
  
  #submitBtn {
    width: 100%;
  }
  
  .examples {
    padding: 20px;
  }
  
  .examples code {
    font-size: 0.8em;
    display: block;
    margin-top: 8px;
  }
}