:root{--green: #1f6f5c;--green-l: #eaf4f0;--ink: #22312e;--line: #d9e4e0;--ok: #1a7f4b;--ng: #c0392b;--paper: #fbfaf6}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,Hiragino Sans,Hiragino Kaku Gothic ProN,sans-serif;line-height:1.7;-webkit-text-size-adjust:100%}.wrap{max-width:760px;margin:0 auto;padding:16px 16px 48px}header{padding:12px 0 4px}h1{margin:0;font-size:26px;color:var(--green);letter-spacing:.04em}.sub{margin:2px 0 0;font-size:13px;color:#6b7a76}.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;margin:14px 0}.card h2{margin:0 0 12px;font-size:16px;color:var(--green)}.alert{background:#fff4e5;border:1px solid #f0c48a;border-radius:10px;padding:12px 14px;margin:12px 0;font-size:14px}.hint{font-size:13px;color:#5d6b67;margin:10px 0 0}.proof{background:var(--green-l);border-color:#bcd8ce}.bigrow{display:flex;gap:10px}.big{flex:1;background:#fff;border-radius:10px;padding:12px 8px;text-align:center}.bignum{font-size:30px;font-weight:700;color:var(--green);line-height:1.2}.bignum span{font-size:14px;font-weight:400;margin-left:2px}.biglabel{font-size:12px;color:#5d6b67}.tbl{width:100%;border-collapse:collapse;font-size:14px}.tbl.mt{margin-top:12px}.tbl th,.tbl td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left}.tbl th{font-weight:600;color:#5d6b67;font-size:12px}.tbl .num{text-align:right;font-variant-numeric:tabular-nums}.tbl tr.total td{font-weight:700;border-bottom:none}.tabs{display:flex;gap:8px;margin-bottom:14px}.tab{flex:1;padding:12px 0;font-size:15px;border-radius:10px;cursor:pointer;border:1px solid var(--line);background:#fff;color:var(--ink)}.tab.on{background:var(--green);border-color:var(--green);color:#fff;font-weight:700}.qmeta{font-size:12px;color:#8a9793}.qtext{font-size:17px;margin:6px 0 14px}.opts{display:flex;flex-direction:column;gap:8px}.opt{display:flex;align-items:center;gap:10px;text-align:left;width:100%;padding:13px 12px;font-size:15px;border-radius:10px;cursor:pointer;border:1px solid var(--line);background:#fff;color:var(--ink)}.opt .no{flex:0 0 24px;height:24px;line-height:24px;text-align:center;border-radius:50%;background:var(--green-l);color:var(--green);font-size:13px}.opt.ok{border-color:var(--ok);background:#eaf7ef}.opt.ng{border-color:var(--ng);background:#fdeeec}.opt.dim{opacity:.5}.opt:disabled{cursor:default}.write textarea{width:100%;padding:10px;font-size:16px;border-radius:10px;border:1px solid var(--line);font-family:inherit;line-height:1.6}.model{margin:10px 0 4px;font-size:15px}.points{margin:0 0 12px;padding-left:20px;font-size:13px;color:#5d6b67}.grade{display:flex;gap:8px}.expl{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);font-size:14px}.judge{font-weight:700;margin-bottom:4px}.judge.ok{color:var(--ok)}.judge.ng{color:var(--ng)}.btn{padding:12px 18px;font-size:15px;border-radius:10px;cursor:pointer;border:1px solid var(--green);background:var(--green);color:#fff;font-family:inherit}.btn.ok{background:var(--ok);border-color:var(--ok)}.btn.ng{background:#fff;color:var(--ng);border-color:var(--ng)}.btn.danger{background:#fff;color:var(--ng);border-color:var(--ng);margin-top:10px}.verdict{margin-top:12px;padding:12px;border-radius:10px;font-weight:700;text-align:center}.verdict.ok{background:#eaf7ef;color:var(--ok)}.verdict.ng{background:#fdeeec;color:var(--ng)}.log{list-style:none;margin:0;padding:0;font-size:13px}.log li{display:flex;gap:10px;align-items:center;padding:6px 0;border-bottom:1px solid var(--line)}.log .when{color:#8a9793;font-variant-numeric:tabular-nums}.log .who{font-weight:600}.log .id{color:#8a9793;flex:1}.log .mark.ok{color:var(--ok);font-weight:700}.log .mark.ng{color:var(--ng);font-weight:700}footer{text-align:center;font-size:12px;color:#8a9793;padding:20px 0}