:root{--ink:#173b3b;--muted:#617372;--paper:#f3f5ef;--line:#dbe2d9;--green:#156b57;--lime:#d8ef8d}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 system-ui,"Microsoft JhengHei",sans-serif}button,select{font:inherit}button,.import{cursor:pointer;border:1px solid var(--line);background:white;color:var(--ink);border-radius:10px;padding:11px 18px;font-weight:650}button:hover,.import:hover{border-color:var(--green);background:#edf4e8}button:disabled{opacity:.45;cursor:default}button:focus-visible,select:focus-visible{outline:3px solid #a7c750;outline-offset:3px}header{display:flex;align-items:center;gap:28px;padding:22px max(5vw,24px);border-bottom:1px solid var(--line)}header>span{font-size:13px;color:var(--muted)}header button{margin-left:auto}.brand{font-size:22px;font-weight:850;color:var(--ink);text-decoration:none}main{max-width:1120px;margin:auto;padding:48px 24px}h1{font-size:clamp(44px,6vw,72px);line-height:1.2;letter-spacing:-2px;margin:20px 0}h1 em{font-style:normal;background:var(--lime);padding:0 12px}h2{margin:8px 0 20px;font-size:26px}.hero{position:relative;padding:16px 0 36px}.hero:after{content:'ϟ';position:absolute;right:8%;top:0;color:#bdd3bb;font-size:220px;line-height:1.1;transform:rotate(12deg);z-index:-1}.hero p{color:var(--muted)}.eyebrow{font-size:13px;font-weight:750;letter-spacing:2px}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:14px;overflow:hidden;margin-bottom:28px}.stat{background:#fff;padding:20px}.stat strong{display:block;font-size:32px;line-height:1.2}.stat span{font-size:13px;color:var(--muted)}.panel{background:white;border:1px solid var(--line);border-radius:20px;padding:30px}.fields{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:18px}label{font-size:13px;color:var(--muted)}select{width:100%;padding:12px 8px;border:1px solid var(--line);border-radius:8px;background:#fafbf8;color:var(--ink);margin-top:8px}.modes{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}.primary{background:var(--green);color:#fff;border-color:var(--green)}.primary:hover{background:#115442;color:white}.footnote{font-size:13px;color:var(--muted);margin-top:25px}.footnote button,.import{font-size:12px;padding:5px 10px}footer{padding:24px 5vw;border-top:1px solid var(--line);font-size:13px;display:flex;justify-content:space-between}.quiztop,.qmeta{display:flex;justify-content:space-between;align-items:center;gap:12px}.quiztop{font-size:14px}.track{height:5px;background:var(--line);margin:18px 0 28px;border-radius:8px}#bar{height:100%;background:var(--green);transition:width .2s}.qmeta{font-size:13px;color:var(--muted)}#qtitle{margin-top:18px}#hint{font-size:14px;color:var(--muted)}.figure{overflow:auto;background:white;border:1px solid #e6e9e1;border-radius:12px;padding:12px}.figure img{width:100%;display:block;cursor:zoom-in}.figure small{color:var(--muted);font-size:11px}.options{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:24px 0}.options button{font-size:21px;padding:15px}.options button.selected{background:var(--ink);color:white}.options button.correct{border:2px solid #168154;background:#e2f4e8;color:#125c3d}.options button.incorrect{border:2px solid #b43b37;background:#ffeded;color:#8e2d2b}#feedback:not(:empty){padding:18px;border-radius:12px;background:#f0f5e9;margin-bottom:24px}.actions{display:flex;gap:10px;flex-wrap:wrap}.navigator{display:flex;flex-wrap:wrap;gap:7px;margin-top:20px}.navigator button{padding:7px;min-width:40px}.navigator button.done{background:#dcead5}.navigator button.current{outline:2px solid var(--green)}#result h1{font-size:64px}.reviewrow{padding:15px 0;border-bottom:1px solid var(--line)}dialog{width:min(1200px,96vw);max-height:95vh;border:0;border-radius:16px}dialog img{width:100%;min-width:700px}dialog::backdrop{background:#14332dcc}dialog button{position:sticky;top:0} [hidden]{display:none!important}@media(max-width:650px){header{gap:8px;padding:16px}header>span{display:none}.brand{font-size:19px}main{padding:25px 15px}.hero:after{right:0;font-size:160px;opacity:.45}.stats{grid-template-columns:repeat(2,1fr)}.stat{padding:16px}.fields{grid-template-columns:1fr 1fr}.fields label:first-child{grid-column:span 2}.panel{padding:20px 15px}.figure{padding:3px}.figure img{min-width:680px}.options{gap:7px}.actions button{flex:1;padding:10px}.quiztop{font-size:12px}h2{font-size:22px}}

/* Mobile reading and touch controls */
.mobile-reading,.option-reading{display:none}.zoomtools{display:flex;gap:14px;align-items:center;justify-content:space-between;position:sticky;top:0;background:white;padding:8px 0;z-index:2}.zoomtools label{display:flex;gap:8px;align-items:center}.zoomtools select{width:auto;margin:0}.zoomcanvas{overflow:auto;max-height:75dvh;touch-action:pan-x pan-y pinch-zoom}.zoomcanvas img{min-width:0;max-width:none;display:block}button{touch-action:manipulation}
@media(max-width:650px){
body{padding-bottom:env(safe-area-inset-bottom);-webkit-text-size-adjust:100%}header{padding:12px 14px}.brand{font-size:18px}header button{min-height:44px;padding:8px 12px}main{padding:20px 12px}h1{font-size:40px;letter-spacing:-1px}.hero{padding:4px 0 16px}.hero:after{font-size:120px}.hero p{font-size:15px}.stats{margin-bottom:18px}.stat strong{font-size:28px}.panel{padding:18px 12px}.fields{gap:12px}.fields label{min-width:0}select{font-size:16px;min-height:48px}.modes{display:grid;grid-template-columns:1fr 1fr;gap:10px}.modes button{min-height:48px;padding:10px}.modes .primary,.modes #resume{grid-column:1/-1}.quiztop{flex-wrap:wrap;gap:8px;font-size:13px}.track{margin:12px 0 16px}.qmeta>span{max-width:65%;overflow-wrap:anywhere}.qmeta button{min-height:44px;padding:8px 12px}#qtitle{margin:14px 0 8px;font-size:23px}#hint{margin-top:6px}.mobile-reading{display:block;font-size:20px;line-height:1.8;overflow-wrap:anywhere}.mobile-reading p{margin:16px 0 8px}.mobile-reading small{display:block;font-size:12px;line-height:1.5;color:var(--muted);margin-bottom:14px}.figure{padding:6px}.figure img{min-width:0;width:100%}.figure small{display:block;margin:7px 0 0;font-size:12px}.options{grid-template-columns:1fr;gap:10px;margin:18px 0}.options button{display:flex;align-items:flex-start;gap:12px;text-align:left;min-height:54px;font-size:22px;padding:13px 14px}.option-reading{display:block;flex:1;font-size:18px;font-weight:500;line-height:1.65;overflow-wrap:anywhere}.actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;background:white;padding-bottom:env(safe-area-inset-bottom)}.actions button{min-height:48px;font-size:15px}.actions #check{grid-column:1/-1;grid-row:1}.actions #finish{grid-column:1/-1;font-size:14px}.navigator{max-height:160px;overflow:auto;padding:4px;gap:8px}.navigator button{min-height:44px;min-width:44px}dialog{width:100vw;max-width:100vw;height:100dvh;max-height:100dvh;margin:0;padding:12px;border-radius:0}.zoomcanvas{max-height:calc(100dvh - 100px)}.zoomtools button{min-height:44px}.footnote button,.import{display:inline-block;min-height:44px;padding:10px;margin-top:6px}footer{font-size:12px;gap:12px}.reviewrow{overflow-wrap:anywhere}
}