:root{
  --red:#c0392b; --red-l:#fdf3f2; --red-b:#f0d5d2;
  --ink:#1f2328; --gray:#6b7280; --line:#e5e7eb; --bg:#f7f8fa;
  --ok:#1a7f4b; --warn:#b7791f; --err:#c0392b;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:14px/1.6 "Microsoft YaHei","PingFang SC",system-ui,sans-serif}

.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:12px 24px;background:#fff;border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:12px}
.logo{width:36px;height:36px;border-radius:8px;background:var(--red);color:#fff;
  display:grid;place-items:center;font-size:18px;font-weight:700}
.t1{font-size:16px;font-weight:700}
.t2{font-size:12px;color:var(--gray)}
.top-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.hint{font-size:12px;color:var(--gray)}
.hint.on{color:var(--ok)}

.wrap{max-width:1180px;margin:0 auto;padding:20px 24px 60px}

.card{background:#fff;border:1px solid var(--line);border-radius:10px;
  padding:16px 18px;margin-bottom:16px}
.card-hd{display:flex;align-items:center;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.card-hd h2{font-size:15px;margin:0;font-weight:700}
.step{width:22px;height:22px;border-radius:6px;background:var(--red);color:#fff;
  display:grid;place-items:center;font-size:12px;font-weight:700;flex:none}
.sub{font-size:12px;color:var(--gray)}
.spacer{flex:1}
.mt{margin-top:14px}
.muted{font-size:11px;color:var(--gray);font-weight:400}

.row{display:flex;gap:8px;margin-bottom:10px;flex-wrap:wrap}
.row2{display:flex;gap:10px}
.row2>div{flex:1}

.ipt{flex:2;min-width:130px;padding:8px 10px;border:1px solid var(--line);
  border-radius:6px;font-size:13px;outline:none;background:#fff;font-family:inherit}
.ipt:focus{border-color:var(--red)}
.ipt.sm{flex:1;min-width:100px}
select.ipt{cursor:pointer}

.btn{padding:8px 16px;border:1px solid var(--red);background:var(--red);color:#fff;
  border-radius:6px;font-size:13px;cursor:pointer;font-family:inherit;white-space:nowrap}
.btn:hover{filter:brightness(1.08)}
.btn.primary{background:var(--red)}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:var(--red);color:var(--red)}
.btn.sm{padding:5px 10px;font-size:12px}
.btn:disabled{opacity:.5;cursor:not-allowed}

.tip{font-size:12px;color:var(--gray);background:var(--red-l);
  border-left:3px solid var(--red);padding:6px 10px;border-radius:4px;margin-bottom:10px}

.result{margin-top:6px}
.hidden{display:none!important}

.kw-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:8px}
.kw{border:1px solid var(--line);border-radius:8px;padding:9px 11px;cursor:pointer;
  transition:.15s;background:#fff}
.kw:hover{border-color:var(--red);background:var(--red-l)}
.kw .k{font-size:13px;font-weight:600;margin-bottom:5px}
.kw .meta{display:flex;gap:5px;flex-wrap:wrap}
.tag{font-size:11px;padding:1px 6px;border-radius:3px;background:#f2f3f5;color:var(--gray)}
.tag.intent{background:#eef4ff;color:#2a5db0}
.tag.plat{background:#fdf3f2;color:var(--red)}
.tag.easy{background:#eaf7ef;color:var(--ok)}
.tag.hard{background:#fdecea;color:var(--err)}
.kw .note{font-size:11px;color:var(--gray);margin-top:5px;line-height:1.5}

.tlist{display:flex;flex-direction:column;gap:6px}
.titem{display:flex;align-items:center;gap:10px;padding:8px 11px;
  border:1px solid var(--line);border-radius:7px;cursor:pointer;transition:.15s}
.titem:hover{border-color:var(--red);background:var(--red-l)}
.titem .n{font-size:11px;color:#fff;background:var(--red);width:18px;height:18px;
  border-radius:4px;display:grid;place-items:center;flex:none}
.titem .txt{flex:1;font-size:13.5px}
.titem .len{font-size:11px;color:var(--gray);flex:none}

.prog{margin-top:8px;font-size:12px;color:var(--gray)}
.prog .bar{height:3px;background:var(--line);border-radius:2px;overflow:hidden;margin-bottom:6px;position:relative}
.prog .bar::after{content:"";position:absolute;inset:0;width:40%;background:var(--red);
  animation:slide 1.1s ease-in-out infinite}
@keyframes slide{0%{left:-40%}100%{left:100%}}

.split{display:grid;grid-template-columns:1fr 340px;gap:14px;margin-top:12px}
.pane{border:1px solid var(--line);border-radius:8px;overflow:hidden;display:flex;flex-direction:column}
.pane-hd{font-size:12px;font-weight:700;padding:8px 12px;background:#fafbfc;border-bottom:1px solid var(--line)}
.editor{flex:1;min-height:460px;border:0;padding:14px;font-size:13px;line-height:1.85;
  font-family:"Microsoft YaHei",Consolas,monospace;resize:vertical;outline:none;width:100%}
.pane.side{max-height:560px;overflow:auto}
.issues{padding:10px 12px;display:flex;flex-direction:column;gap:7px}
.iss{display:flex;gap:8px;font-size:12px;line-height:1.55}
.iss .dot{width:7px;height:7px;border-radius:50%;margin-top:6px;flex:none}
.iss.ok .dot{background:var(--ok)} .iss.warn .dot{background:var(--warn)} .iss.err .dot{background:var(--err)}
.iss.ok{color:var(--gray)} .iss.warn{color:#8a5a00} .iss.err{color:var(--err);font-weight:600}
.iss .rl{font-weight:700}
.checklist{padding:0 12px 12px 28px;margin:0;font-size:11.5px;color:var(--gray);line-height:1.9}
.score{font-size:12px;padding:3px 10px;border-radius:20px;font-weight:700}
.score.good{background:#eaf7ef;color:var(--ok)}
.score.mid{background:#fdf6e3;color:var(--warn)}
.score.bad{background:#fdecea;color:var(--err)}

.saved{display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  background:#eaf7ef;border:1px solid #bfe3cd;border-radius:8px;padding:9px 12px;margin:10px 0}
.ok-badge{background:var(--ok);color:#fff;font-size:11px;font-weight:700;
  padding:2px 9px;border-radius:20px;flex:none}
.saved code{font-size:12px;background:#fff;border:1px solid #bfe3cd;
  padding:2px 7px;border-radius:4px;color:#1a7f4b}
.saved .path{font-size:11px;color:var(--gray);flex:1;min-width:160px;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.saved a.btn{text-decoration:none;display:inline-block}

.hist{display:flex;align-items:center;gap:10px;padding:8px 11px;border:1px solid var(--line);
  border-radius:7px;margin-bottom:6px}
.hist .t{flex:1;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hist a.t{color:var(--ink);text-decoration:none}
.hist a.t:hover{color:var(--red);text-decoration:underline}
.hist .d{font-size:11px;color:var(--gray);flex:none}
.hist a.btn{text-decoration:none;display:inline-block}
.empty{font-size:12px;color:var(--gray);padding:14px;text-align:center}

.mask{position:fixed;inset:0;background:rgba(15,18,22,.45);display:grid;
  place-items:center;z-index:50;padding:20px}
.modal{background:#fff;border-radius:12px;width:520px;max-width:100%;max-height:88vh;
  display:flex;flex-direction:column}
.modal.narrow{width:400px}
.modal-hd{display:flex;align-items:center;justify-content:space-between;
  padding:14px 18px;border-bottom:1px solid var(--line)}
.modal-hd h3{margin:0;font-size:15px}
.x{border:0;background:0;font-size:22px;cursor:pointer;color:var(--gray);line-height:1}
.modal-bd{padding:16px 18px;overflow:auto}
.modal-bd label{display:block;font-size:12px;color:var(--gray);margin:10px 0 4px}
.modal-bd label:first-child{margin-top:0}
.modal-bd .ipt{width:100%;flex:none}
.help{font-size:11px;color:var(--gray);margin:4px 0 0}
.keyhint{font-weight:600;margin-left:6px}
.keyhint.on{color:var(--ok)}
.keyhint.off{color:var(--warn)}
.modal-ft{display:flex;gap:8px;align-items:center;padding:14px 18px;border-top:1px solid var(--line);flex-wrap:wrap}

.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(20px);
  background:#1f2328;color:#fff;padding:9px 18px;border-radius:6px;font-size:13px;
  opacity:0;pointer-events:none;transition:.25s;z-index:99}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media(max-width:900px){
  .split{grid-template-columns:1fr}
  .pane.side{max-height:none}
}