:root{--bg:#f7f7fb;--card:#fff;--ink:#111;--sub:#5b6573;--accent:#0f172a}
*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans JP",sans-serif;background:var(--bg);color:var(--ink);margin:0}
.container{max-width:1100px;margin:0 auto;padding:24px 16px}
.title{font-weight:800;font-size:clamp(20px,3vw,28px)}
.sub{color:var(--sub);font-size:13px}
.grid{display:grid;gap:16px}
@media(min-width:900px){.g-2{grid-template-columns:1fr 2fr}.g-half{grid-template-columns:1fr 1fr}}
.card{background:var(--card);border-radius:16px;padding:16px;box-shadow:0 8px 20px rgba(16,24,40,.06)}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
label{display:block;font-size:12px;color:var(--sub)}
input{padding:10px 12px;border:1px solid #e5e7eb;border-radius:10px;width:100%}
.q{border:1px solid #e5e7eb;border-radius:12px;padding:12px}
.domain{font-size:12px;color:var(--sub)}
.qtext{font-weight:600;margin:4px 0 8px}
.scale-btns button{border:1px solid #e5e7eb;padding:6px 10px;border-radius:20px;background:#fff;font-size:12px;cursor:pointer}
.scale-btns button.active{background:var(--accent);color:#fff}
.btn{background:var(--accent);color:#fff;border:none;padding:12px 16px;border-radius:14px;cursor:pointer}
.btn.outline{background:#fff;color:var(--ink);border:1px solid #e5e7eb}
.btn-primary{background:linear-gradient(90deg,#2563eb,#0ea5e9)}
.btn-lg{padding:14px 22px;font-size:16px;border-radius:9999px;box-shadow:0 6px 18px rgba(37,99,235,.25)}
.btn-block{width:100%;max-width:320px}
.center{display:flex;justify-content:center}
.foot{color:#6b7280;font-size:12px;text-align:center;margin-top:28px}
.hint{font-size:11px;color:#6b7280}
canvas{max-height:380px}
ul{padding-left:18px;margin:0}
.small{font-size:13px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
#loading{display:none;align-items:center;justify-content:center;gap:12px;padding:24px}
.loader{width:48px;height:48px;border:4px solid #e5e7eb;border-top-color:#0f172a;border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
/* ロゴ */
.header-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.header-logo{height:44px;object-fit:contain}
.report-logo{height:32px;object-fit:contain;margin-left:8px}
.btn-block{
  width:100%;
  max-width:320px;
  text-align: center; /* この行を追加 */
}