html, body {
  width: 100%;
  height: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
  background: #f5f7fa;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}