:root{--paper:#edf1f3;--ink:#203340;--muted:#607580;--blue:#215f88;--line:#cbd6dc;--stop:#b53b32;--white:#fff;--good:#23745c}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Yu Gothic UI","Meiryo",sans-serif;line-height:1.7}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #e7a633;outline-offset:4px}button:disabled{cursor:default}header{max-width:1440px;margin:auto;padding:25px 32px 19px;display:flex;align-items:center;gap:20px}.code{font:700 43px/1.1 "Bahnschrift","Arial",sans-serif;letter-spacing:-2px;border-right:1px solid var(--line);padding-right:22px}.eyebrow{font-size:12px;color:var(--muted);letter-spacing:.08em}h1{font-size:23px;letter-spacing:.02em;margin:0;font-weight:700}.version{margin-left:auto;align-self:flex-start;font-size:11px;padding-top:6px;color:var(--muted)}main{max-width:1440px;margin:auto;padding:0 32px 36px}.workspace{display:grid;grid-template-columns:minmax(0,1fr) 345px;gap:24px;align-items:start}.screen{background:#152b37;position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:6px}video{display:block;width:100%;height:100%;object-fit:contain}.viewlabel{position:absolute;top:15px;left:16px;background:rgba(22,39,47,.86);color:#fff;padding:4px 10px;font-size:12px;border-left:3px solid #90b8ce;pointer-events:none}.startcover{position:absolute;inset:0;display:grid;place-content:center;text-align:center;background:rgba(17,37,48,.35);color:white}.startcover button{border:1px solid #fff;background:white;color:var(--ink);padding:13px 29px;border-radius:3px;font-weight:700;font-size:16px}.startcover p{font-size:12px;margin:9px 0 0;text-shadow:0 1px 4px #142932}.toolbar{display:flex;gap:8px;align-items:center;margin-top:13px}.button{border:1px solid var(--line);background:white;color:var(--ink);border-radius:3px;padding:7px 13px;font-size:13px}.button.primary{background:var(--blue);border-color:var(--blue);color:white}.time{font-family:"Bahnschrift",monospace;color:var(--muted);font-size:12px;margin-left:auto}.track{height:5px;background:#cad6dc;margin-top:14px;position:relative;border-radius:2px}.progress{height:100%;width:0;background:var(--blue)}.stopmark{position:absolute;left:33.333%;top:-4px;height:13px;width:2px;background:var(--stop)}.tracklabels{display:flex;justify-content:space-between;margin-top:7px;font-size:11px;color:var(--muted)}.tracklabels span:nth-child(2){position:absolute;margin-left:calc((100% - 0px)/3)}.undertext{font-size:12px;margin:16px 0 0;color:var(--muted)}aside{background:white;border-top:4px solid var(--blue);padding:22px 23px 23px;border-radius:3px;min-height:370px}.phase{font-size:12px;color:var(--blue);font-weight:700;margin:0 0 13px}h2{font-size:19px;line-height:1.65;margin:0 0 16px}.intro{font-size:14px;color:var(--muted);margin:0}.notice{margin-top:24px;padding-top:17px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.options{display:flex;flex-direction:column;gap:9px}.option{text-align:left;display:flex;gap:11px;border:1px solid var(--line);background:white;padding:12px 11px;border-radius:4px;color:var(--ink);font-size:13px;line-height:1.6}.option strong{font:600 17px "Bahnschrift",sans-serif;color:var(--blue);padding-top:3px}.option:hover:not(:disabled){border-color:var(--blue);background:#f0f6f9}.option.correct{border:2px solid var(--good);background:#f0f8f3}.option.wrong{border:2px solid var(--stop);background:#fdf3f0}.feedback{border-top:1px solid var(--line);margin-top:17px;padding-top:15px;font-size:13px}.feedback p{margin:0 0 12px}.feedback strong{display:block;margin-bottom:5px}.feedback button{width:100%}.after{margin-top:28px;background:white;border-radius:4px;padding:22px;display:grid;grid-template-columns:1.2fr 1fr;gap:26px;align-items:center}.after img{width:100%;border-radius:3px}.after h2{font-size:20px;margin-bottom:11px}.after p{font-size:14px}.after small{font-size:11px;color:var(--muted)}[hidden]{display:none!important}footer{font-size:11px;color:var(--muted);margin-top:23px;display:flex;gap:20px}footer a{color:var(--muted)}@media(max-width:1050px){.workspace{grid-template-columns:minmax(0,1fr) 305px;gap:18px}aside{padding:18px}h2{font-size:17px}}@media(max-width:800px){header{padding:19px 18px 17px;gap:14px}.code{font-size:34px;padding-right:15px}h1{font-size:19px}.version{display:none}main{padding:0 18px 25px}.workspace{display:block}aside{margin-top:22px;min-height:0}.after{grid-template-columns:1fr;padding:18px;gap:15px}.toolbar{flex-wrap:wrap}.viewlabel{top:9px;left:10px;font-size:10px}footer{flex-wrap:wrap;gap:10px}}
.tracklabels{position:relative}.tracklabels span:nth-child(2){left:33.333%;margin-left:0;transform:translateX(-50%)}
.answerlabel{position:absolute;top:15px;right:16px;background:rgba(22,39,47,.86);color:#fff;padding:4px 10px;font-size:12px;pointer-events:none}.loading{position:absolute;inset:0;display:grid;place-content:center;background:#142932a0;color:white;font-size:14px}.viewbar{display:flex;gap:10px;align-items:center;margin-top:14px;flex-wrap:wrap}.viewtitle{font-size:12px;font-weight:700}.viewbuttons{display:flex;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:4px;overflow:hidden}.viewbuttons button{font-size:12px;padding:7px 15px;border:0;background:white;color:var(--ink)}.viewbuttons button[aria-pressed=true]{background:var(--blue);color:white}.viewbuttons button:focus-visible{outline-offset:-3px}#viewhint{font-size:11px;color:var(--muted)}button:disabled{opacity:.5}.option:disabled{opacity:1;color:#75838b}.option.selected{border:2px solid var(--blue);background:#eef5f9;color:var(--ink)}.option.correct,.option.wrong{color:var(--ink)}.toolbar{flex-wrap:wrap}.track{margin-top:16px}.undertext{min-height:2em;font-size:13px}.lesson{padding-top:12px;border-top:1px solid var(--line)}.compare{display:flex;gap:7px;flex-wrap:wrap;margin:18px 0}.compare span{width:100%;font-size:12px;color:var(--muted)}footer{flex-wrap:wrap}.button:hover:not(:disabled){border-color:var(--blue)}@media(max-width:800px){.answerlabel{top:9px;right:10px;font-size:10px}.viewbuttons button{padding:7px 12px}}


/* Completed results form the next reading area, revealed only after playback. */
.workspace,.after,header{scroll-margin-top:24px}
.after{min-height:calc(100svh - 48px);align-content:start}
.after img{aspect-ratio:16/9;object-fit:contain}
.after .review-judgment{font-weight:700;color:var(--blue);margin:0 0 8px}
.review-actions{display:flex;flex-wrap:wrap;gap:9px;margin:0 0 20px}
.screen:focus,#outcome:focus{outline:none}
@media(max-width:800px){.workspace,.after,header{scroll-margin-top:12px}.review-actions .button{flex:1;min-width:150px}.after{min-height:calc(100svh - 24px)}}

.scene-navigation{margin:0 0 12px;font-size:12px}.scene-navigation a{color:var(--muted);text-decoration:none}.scene-navigation a:hover{text-decoration:underline}

#start-hint{max-width:620px;padding:0 16px;margin-inline:auto}.startcover .ja-reference{color:#fff;border-color:#b8d0df}.startcover .ja-label{color:#d8e7f1}