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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: #f8fafc;
  height: 100vh;
  overflow: hidden;
}
:root { --header-height: 0px; }