:root { --maxw: 860px; }

body { font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji"; margin: 0; background: #fafafa; color: #111; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 24px 16px 56px; }

.card { background: #fff; border: 1px solid #e5e7eb; border-radius: 12px; padding: 18px 18px; }

h1 { font-size: 20px; margin: 0 0 12px; }
h2 { font-size: 16px; margin: 18px 0 10px; }

.progress { font-size: 18px; letter-spacing: 2px; margin: 0 0 12px; }

.notice { color: #374151; font-size: 14px; line-height: 1.5; }

.q { margin: 14px 0; }
.q-title { font-weight: 600; margin: 0 0 8px; }

.options { display: grid; gap: 8px; padding-left: 14px; }
.option { display: flex; gap: 10px; align-items: flex-start; }
.option input { margin-top: 3px; }

.actions { margin-top: 18px; display: flex; gap: 12px; }

.btn { appearance: none; border: 1px solid #111; background: #111; color: #fff; border-radius: 10px; padding: 10px 14px; font-size: 15px; cursor: pointer; }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; }
.btn.secondary { background: #fff; color: #111; }

.error { margin: 12px 0 0; color: #b91c1c; font-size: 14px; }

.message-box { white-space: pre-wrap; line-height: 1.7; font-size: 16px; }

.small { font-size: 13px; color: #6b7280; }

.scale { display: grid; gap: 8px; padding-left: 14px; }
.scale label { display: flex; gap: 10px; align-items: center; }
.scale input { margin: 0; }

.center { display: grid; place-items: center; min-height: 55vh; }
.spinner { width: 28px; height: 28px; border: 3px solid #e5e7eb; border-top-color: #111; border-radius: 50%; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }