:root{--teal:#6aacbc;--teal-dark:#4f8d9d;--teal-deep:#2f6675;--yellow:#ebca62;--yellow-deep:#a9831f;--ink:#1f2d33;--ink-soft:#5b6d73;--paper:#eef3f4;--white:#fff;--line:#2f667524;--shadow:0 8px 30px #2f66751a}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{color:var(--ink);background:var(--paper);font-family:Noto Sans JP,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.7}button{cursor:pointer;font-family:inherit}a{color:inherit;text-decoration:none}input,textarea{font-family:inherit}code{font-size:.92em}.login{background:var(--teal);text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:32px;display:flex}.llens{background:var(--yellow);border-radius:50%;justify-content:center;align-items:center;width:84px;height:84px;margin-bottom:24px;display:flex}.llens div{background:#fff;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;display:flex}.llens div div{background:var(--teal);border-radius:50%;width:16px;height:16px}.login h1{color:#fff;letter-spacing:.06em;font-size:30px;font-weight:900}.login .ysub{color:#eaf4f6;margin:6px 0 28px;font-size:14px;font-weight:700}.lcard{text-align:left;background:#fff;border-radius:18px;width:100%;max-width:380px;padding:26px 24px;box-shadow:0 12px 40px #0000002e}.lcard label{color:var(--ink-soft);margin-bottom:8px;font-size:13px;font-weight:700;display:block}.lcard input{border:1px solid var(--line);background:#f7fbfb;border-radius:12px;width:100%;padding:12px 14px;font-size:15px}.lcard input:focus{border-color:var(--teal);outline:none;box-shadow:0 0 0 3px #6aacbc2e}.lcard button{background:var(--teal-deep);color:#fff;border:none;border-radius:12px;width:100%;margin-top:14px;padding:13px;font-size:15px;font-weight:700}.lcard button:disabled{opacity:.55}.lnote{color:var(--ink-soft);margin-top:12px;font-size:11.5px;line-height:1.6}.banner{color:#7a5e12;background:#ebca6238;border:1px solid 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.meta{color:var(--ink-soft);margin-bottom:14px;font-size:12px}.prog{background:#2f66751a;border-radius:99px;height:8px;margin-bottom:10px;overflow:hidden}.prog i{background:var(--teal);border-radius:99px;height:100%;display:block}.pills{flex-wrap:wrap;gap:8px;display:flex}.pill{white-space:nowrap;border-radius:99px;padding:3px 10px;font-size:11px;font-weight:700;display:inline-block}.pi-done{color:var(--teal-deep);background:#6aacbc2e}.pi-write{color:var(--yellow-deep);background:#ebca624d}.pi-inv{color:var(--ink-soft);background:#5b6d7324}.tbl{border:1px solid var(--line);border-collapse:collapse;width:100%;box-shadow:var(--shadow);background:#fff;border-radius:14px;overflow:hidden}.tbl th{text-align:left;color:var(--ink-soft);border-bottom:1px solid var(--line);background:#f4f8f9;padding:12px 16px;font-size:12px;font-weight:700}.tbl td{border-bottom:1px solid var(--line);padding:13px 16px;font-size:14px}.tbl tr:last-child td{border-bottom:none}.tbl td:first-child,.tbl 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button{background:var(--teal-deep);color:#fff;border:none;border-radius:12px;width:100%;margin-top:14px;padding:13px;font-size:15px;font-weight:700}.mcover .ferr{color:#ffd9d6;margin-top:10px;font-size:13px}.mhead{z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);background:#eef3f4eb;position:sticky;top:0}.mhead .in{align-items:center;gap:12px;max-width:680px;margin:0 auto;padding:12px 18px;display:flex}.wordmark{letter-spacing:.1em;color:var(--teal-deep);font-size:15px;font-weight:900}.wordmark span{color:var(--yellow-deep)}.pbar{background:#2f66751f;border-radius:999px;flex:1;height:6px;overflow:hidden}.pbar i{background:var(--teal);border-radius:999px;height:100%;transition:width .4s;display:block}.pstep{color:var(--ink-soft);white-space:nowrap;font-size:12px;font-weight:500}.mstage{max-width:680px;margin:0 auto;padding:28px 18px 130px}.chapnum{color:var(--yellow-deep);letter-spacing:.18em;font-size:13px;font-weight:900}.chaptitle{margin:8px 0 6px;font-size:clamp(24px,7vw,32px);font-weight:900;line-height:1.3}.chapintro{color:var(--ink-soft);margin-bottom:26px;font-size:15px}.q{border:1px solid var(--line);box-shadow:var(--shadow);background:#fff;border-radius:18px;margin-bottom:18px;padding:22px 20px}.qid{letter-spacing:.12em;color:var(--teal);background:#6aacbc24;border-radius:999px;margin-bottom:10px;padding:3px 10px;font-size:11px;font-weight:700;display:inline-block}.qlabel{font-size:17px;font-weight:700;line-height:1.7}.qhint{color:var(--ink-soft);margin-top:6px;font-size:13.5px}.axis{color:var(--teal-deep);margin:18px 0 4px;font-size:12.5px;font-weight:700}.track{touch-action:none;height:62px;margin:6px 4px 2px;position:relative}.track .rail{background:#2f667529;border-radius:3px;height:3px;position:absolute;top:30px;left:8px;right:8px}.track .seg{background:var(--yellow);border-radius:3px;height:3px;position:absolute;top:30px}.track .origin{position:absolute;top:30px;transform:translate(-50%,-50%)}.track .origin .odot{border:2px solid var(--teal-deep);background:#fff;border-radius:50%;width:22px;height:22px}.track .origin .tag{white-space:nowrap;color:var(--teal-deep);font-size:11px;font-weight:700;position:absolute;top:18px;left:50%;transform:translate(-50%)}.track .thumb{cursor:grab;z-index:2;touch-action:none;position:absolute;top:30px;transform:translate(-50%,-50%)}.track .thumb .dot{background:var(--yellow);border-radius:50%;width:28px;height:28px;box-shadow:0 4px 12px #a9831f59}.track .thumb .tag{white-space:nowrap;color:var(--yellow-deep);font-size:11px;font-weight:700;position:absolute;top:20px;left:50%;transform:translate(-50%)}.track .merged{display:none;position:absolute;top:30px;transform:translate(-50%,-50%)}.track .merged .ring2{border:2px solid var(--teal-deep);border-radius:50%;justify-content:center;align-items:center;width:34px;height:34px;display:flex}.track .merged .core{background:var(--yellow);border-radius:50%;width:16px;height:16px}.track.same .origin .odot,.track.same .thumb .dot,.track.same .seg{opacity:0}.track.same .merged{display:flex}.samecap{color:var(--teal-deep);margin-top:2px;font-size:13px;font-weight:700}.nudge{color:var(--ink-soft);margin-top:2px;font-size:12px}.words{grid-template-columns:1fr 1fr;gap:10px;margin-top:16px;display:grid}.words .cell label{border-radius:999px;margin-bottom:6px;padding:2px 10px;font-size:11px;font-weight:700;display:inline-block}.cell.then label{color:var(--teal-deep);background:#6aacbc2e}.cell.nowc label{color:var(--yellow-deep);background:#ebca6252}input.line2,textarea.fa2{width:100%;color:var(--ink);border:1px solid var(--line);background:#f7fbfb;border-radius:12px;padding:11px 13px;font-family:inherit;font-size:15px;line-height:1.7}input.line2:focus,textarea.fa2:focus{border-color:var(--teal);background:#fff;outline:none;box-shadow:0 0 0 3px #6aacbc2e}textarea.fa2{resize:vertical;min-height:80px;margin-top:14px}textarea.fa2.big{min-height:120px}.falab{color:var(--ink-soft);margin:14px 0 6px;font-size:13.5px}.choices{grid-template-columns:1fr 1fr;gap:12px;margin-top:14px;display:grid}.choice{border:1.5px solid var(--line);cursor:pointer;text-align:center;color:var(--ink-soft);background:#f7fbfb;border-radius:14px;padding:16px;font-weight:700}.choice .csub{margin-top:4px;font-size:12px;font-weight:400;display:block}.choice.sel{border-color:var(--yellow);color:var(--ink);background:#ebca6224}.mnav{z-index:10;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--line);background:#eef3f4f0;position:fixed;bottom:0;left:0;right:0}.mnav .in{gap:12px;max-width:680px;margin:0 auto;padding:14px 18px;display:flex}.nbtn{cursor:pointer;border:none;border-radius:999px;padding:13px 26px;font-size:15px;font-weight:700}.nbtn.prev{color:var(--ink-soft);border:1.5px solid var(--line);background:0 0}.nbtn.next{background:var(--teal);color:#fff;margin-left:auto}.nbtn.next.gold{background:var(--yellow);color:#5a4509}.nbtn:disabled{opacity:.55}.lensview{background:linear-gradient(180deg,var(--teal-deep),var(--teal));color:#fff;border-radius:0 0 24px 24px;margin:0 -18px 18px;padding:40px 22px 34px}.lensview .kicker{letter-spacing:.2em;color:var(--yellow);font-size:12px;font-weight:900}.lensview h2{margin:8px 0 6px;font-size:clamp(26px,8vw,38px);font-weight:900;line-height:1.25}.lensview p.sub{color:#dcecef;font-size:14px}@media (max-width:520px){.words,.choices{grid-template-columns:1fr}}