:root{--bg: #f5f7fa;--panel: #ffffff;--ink: #12202e;--muted: #6b7885;--line: #dde3ea;--accent: #2d6cdf;--ok: #1f8a4c;--bad: #c0392b;color-scheme:light}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 system-ui,-apple-system,Segoe UI,Malgun Gothic,sans-serif;-webkit-text-size-adjust:100%;padding-bottom:env(safe-area-inset-bottom)}button,input{font:inherit;color:inherit}.wrap{max-width:560px;margin:0 auto;padding:0 14px 40px}header.top{background:var(--ink);color:#fff;padding:calc(12px + env(safe-area-inset-top)) 0 12px;position:sticky;top:0;z-index:5}header.top .wrap{display:flex;align-items:center;gap:10px;padding-bottom:0}header.top h1{font-size:16px;margin:0;font-weight:650}header.top .sub{font-size:13px;color:#a8b6c4;margin-left:auto;font-variant-numeric:tabular-nums}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px;margin-top:12px}.btn{border:1px solid var(--line);background:#fff;border-radius:10px;padding:11px 16px;cursor:pointer;min-height:44px}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}.btn.ghost{background:transparent;color:var(--muted)}.btn:disabled{opacity:.45}.btn.wide{width:100%}.row{display:flex;gap:8px;align-items:center}.row.gap{justify-content:space-between}.grow{flex:1}.exam{display:block;width:100%;text-align:left}.exam b{display:block;font-size:16px;margin-bottom:3px}.exam .meta{color:var(--muted);font-size:13px}.exam-acts{margin-top:12px}.picker{width:100%;margin-top:6px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:15px;min-height:44px}.badge{display:inline-block;font-size:12px;padding:2px 8px;border-radius:999px;border:1px solid var(--line);color:var(--muted);margin-left:6px}.badge.on{background:#eef4fd;border-color:#c5d8f6;color:var(--accent)}.badge.done{background:#f1faf4;border-color:#bfe3cd;color:var(--ok)}.bar{height:4px;background:var(--line);border-radius:4px;overflow:hidden;margin-top:12px}.bar>i{display:block;height:100%;background:var(--accent);transition:width .2s}.qkind{font-size:12px;color:var(--muted)}.qtext{font-size:27px;font-weight:650;margin:10px 0 4px;line-height:1.35;word-break:break-word}.qtext.en{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.cloze-hint{font-size:17px;font-weight:600;color:var(--accent);margin:2px 0 0;padding:6px 10px;background:#eef4fd;border-radius:8px;display:inline-block}.choices{display:grid;gap:8px;margin-top:16px}.choice{text-align:left;padding:14px 16px;border-radius:10px;border:1px solid var(--line);background:#fff;cursor:pointer;min-height:52px}.choice.on{border-color:var(--accent);background:#eef4fd}.choice span{color:var(--muted);margin-right:10px;font-variant-numeric:tabular-nums}input.spell{width:100%;margin-top:16px;padding:13px 14px;border:1px solid var(--line);border-radius:10px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:19px}input.spell:focus{outline:2px solid #b9d0f5;outline-offset:-1px}.nav{display:flex;gap:8px;margin-top:18px}.jump{margin-top:14px}.seg{display:flex;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}.seg-b{flex:1;border:0;background:transparent;padding:10px 8px;font-size:14px;color:var(--muted);cursor:pointer;min-height:44px}.seg-b+.seg-b{border-left:1px solid var(--line)}.seg-b.on{background:var(--ink);color:#fff;font-weight:600}.seg-b:disabled{opacity:.4}.jrow{display:flex;gap:8px;margin-top:8px}.btn.small{padding:9px 12px;min-height:40px;font-size:14px}.grid{display:grid;grid-template-columns:repeat(10,1fr);gap:5px;margin-top:10px}.cell{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:7px;padding:8px 0;font-size:12px;cursor:pointer;font-variant-numeric:tabular-nums;min-height:36px}.cell.done{background:#eef4fd;border-color:#c5d8f6;color:var(--accent)}.cell.now{border-color:var(--ink);border-width:2px;color:var(--ink);font-weight:700}@media(max-width:380px){.grid{grid-template-columns:repeat(5,1fr)}}.btn.speak{margin-top:14px;font-size:18px;padding:16px}.choice.odd{display:flex;gap:10px;align-items:baseline;line-height:1.5}.choice.odd>span:first-child{flex:none}.odd-line{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:15px}.odd-uline{border-bottom:2px solid var(--accent);padding-bottom:1px;font-weight:700}.scramble-wrap{margin-top:14px}.scramble-answer{min-height:52px;padding:10px;border:2px dashed var(--line);border-radius:10px;display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}.scramble-bank{display:flex;flex-wrap:wrap;gap:6px}.scramble-chip{padding:9px 14px;border-radius:8px;border:1px solid var(--line);background:#fff;font-size:16px;cursor:pointer;font-family:ui-monospace,Menlo,Consolas,monospace;min-height:40px}.scramble-chip:active{transform:scale(.96)}.scramble-chip.placed{background:#eef4fd;border-color:#c5d8f6;color:var(--accent)}.ctx-word{color:var(--accent);font-weight:700;border-bottom:2px solid var(--accent);padding-bottom:1px}.ox-sent{font-size:22px}.ox-ko{margin-top:10px;padding:12px 14px;background:var(--bg);border-radius:10px;font-size:18px;font-weight:600;line-height:1.5}.score{text-align:center;padding:10px 0 4px}.score b{display:block;font-size:52px;font-weight:700;line-height:1;font-variant-numeric:tabular-nums}.score span{color:var(--muted);font-size:14px}.item{border-top:1px solid var(--line);padding:13px 0}.item:first-child{border-top:0}.item .q{font-weight:600;margin-bottom:5px}.item .diff{display:grid;grid-template-columns:40px 1fr;row-gap:1px;font-size:14px}.item .diff .k{color:var(--muted);font-size:13px}.item .diff .v{font-family:ui-monospace,Menlo,Consolas,monospace;white-space:pre;word-break:break-all}.item .diff .v.mine{color:var(--bad)}.item .diff .v.right{color:var(--ok)}.item .diff .v.caret{color:var(--bad)}.item .diff mark{background:#ffe08a;color:inherit;border-radius:3px;padding:0 1px}.item .note{color:var(--muted);font-size:13px;margin-top:4px}.item.ok .q:after{content:" ○";color:var(--ok)}.item.no .q:after{content:" ✕";color:var(--bad)}.msg{border-radius:10px;padding:11px 14px;font-size:14px;margin:12px 0 0}.msg.bad{background:#fdf1ef;color:var(--bad);border:1px solid #f0c6c0}.msg.info{background:#f4f7fb;color:var(--muted);border:1px solid var(--line)}.hint{color:var(--muted);font-size:13px}.center{text-align:center}@media print{header.top{display:none!important}.no-print{display:none!important}body{background:#fff;color:#000;padding-bottom:0}.wrap{max-width:100%;padding:0 8px}.card{border:1px solid #999;box-shadow:none;margin-top:6px;padding:8px 10px;page-break-inside:avoid}.score{text-align:left;padding:4px 0}.score b{font-size:24px}.item{page-break-inside:avoid;padding:8px 0}.item .diff .v.mine{color:#b00}.item .diff .v.right{color:#060}.qkind,.bar{display:none}}