body {
  font-family: "Hiragino Sans", "Meiryo", sans-serif;
  background: #f5f5f7;
  margin: 0;
  padding: 40px 16px;
}

.container {
  max-width: 480px;
  margin: 0 auto;
  background: white;
  padding: 32px;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

h1 {
  font-size: 22px;
  margin-bottom: 4px;
}

label {
  display: block;
  margin-top: 16px;
  font-size: 14px;
  color: #333;
}

input, textarea {
  width: 100%;
  padding: 8px;
  margin-top: 4px;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-sizing: border-box;
  font-family: inherit;
}

button {
  margin-top: 24px;
  width: 100%;
  padding: 12px;
  background: #2d6cdf;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
}

button:disabled {
  background: #9fb6e0;
  cursor: not-allowed;
}

.loading {
  margin-top: 10px;
  color: #2d6cdf;
  font-size: 14px;
}

.flash {
  list-style: none;
  padding: 0;
}

.flash-error {
  color: #c0392b;
}

.flash-success {
  color: #27ae60;
}