frontend/src/index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

/* 全局 reset 與字型 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

#root {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}