body {
  font-family:
    system-ui,
    -apple-system,
    Segoe UI,
    Roboto,
    Helvetica,
    Arial,
    sans-serif;
  max-width: 720px;
  margin: 40px auto;
  padding: 0 16px;
  line-height: 1.6;
}
.card {
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 20px;
}
label {
  display: block;
  margin: 12px 0 6px;
}
input,
textarea {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
}
button {
  margin-top: 16px;
  padding: 12px 16px;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
}
.content-box {
  display: flex;
  flex-direction: column;
  margin-bottom: 8px;
}
.agree > input {
  width: 14px;
  height: 14px;
  margin-right: 4px;
  margin-top: 2px;
}
.reason {
  width: 100%;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 8px;
}
.primary {
  background: black;
  color: white;
  transition: all 0.3s ease;
}

.primary:disabled {
  background: #ccc;
  color: #666;
  cursor: not-allowed;
}

small {
  color: #555;
}