*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: #f5f5f5;
  color: #333;
  font-family: -apple-system, BlinkMacSystemFont, 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP',
    Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

main {
  max-width: 560px;
  margin: 0 auto;
  padding: 32px 16px;
}

section {
  padding: 24px 20px;
  border-radius: 8px;
  background: #fff;
}

h1 {
  margin: 0 0 16px;
  font-size: 20px;
  line-height: 1.4;
}

h1:focus {
  outline: none;
}

p {
  margin: 0 0 12px;
}

.note {
  color: #666;
  font-size: 14px;
}

button {
  display: block;
  width: 100%;
  margin-top: 24px;
  padding: 14px 16px;
  border: none;
  border-radius: 8px;
  background: #eb5505;
  color: #fff;
  font: inherit;
  font-weight: bold;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}