.qu{background:var(--border);grid-template-columns:220px 1fr 260px;gap:1px;min-height:540px;display:grid}.qu-side{background:var(--bg-sidebar);flex-direction:column;gap:16px;padding:16px;display:flex}.qu-main{background:var(--bg-page);flex-direction:column;gap:18px;min-width:0;padding:22px 24px;display:flex}.qu-tracks{flex-direction:column;display:flex}.qu-track{border-bottom:1px solid var(--border);cursor:default;flex-direction:column;gap:8px;padding:13px 14px;transition:background .15s;display:flex}.qu-track:last-child{border-bottom:none}.qu-track:hover{background:var(--bg-elevated)}.qu-track.on{background:var(--gold-tint-08);border-left:2px solid var(--gold);padding-left:12px}.qu-track-head{justify-content:space-between;align-items:center;gap:8px;display:flex}.qu-track-name{font-family:var(--font-ui);color:var(--text-secondary);font-size:12.5px;font-weight:600;line-height:1.3}.qu-track.on .qu-track-name{color:var(--text-primary)}.qu-track-now{font-family:var(--font-ui);letter-spacing:1px;text-transform:uppercase;color:var(--text-on-gold);background:var(--gold);border-radius:4px;flex-shrink:0;padding:2px 6px;font-size:8.5px;font-weight:700}.qu-track-meta{font-family:var(--font-ui);letter-spacing:.4px;text-transform:uppercase;color:var(--text-tertiary);justify-content:space-between;align-items:center;font-size:10.5px;display:flex}.qu-track-pct{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}.qu-track.on .qu-track-pct{color:var(--gold-bright)}.qu-bar{background:var(--border);border-radius:999px;height:4px;overflow:hidden}.qu-bar-fill{background:linear-gradient(90deg, var(--gold) 0%, var(--gold-bright) 100%);border-radius:999px;height:100%}.qu-lesson-head{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.qu-lesson-track{font-family:var(--font-ui);letter-spacing:1px;text-transform:uppercase;color:var(--gold);margin-bottom:5px;font-size:10.5px;font-weight:700}.qu-lesson-title{font-family:var(--font-serif);color:var(--text-primary);font-size:21px;font-weight:700;line-height:1.2}.qu-lesson-tags{flex-shrink:0;align-items:center;gap:10px;display:flex}.qu-duration{font-family:var(--font-mono);color:var(--text-tertiary);font-variant-numeric:tabular-nums;font-size:12px}.qu-cell{border:1px solid var(--border-strong);background:#0b0b0b;border-radius:10px;overflow:hidden}.qu-cell-bar{background:var(--bg-elevated);border-bottom:1px solid var(--border);align-items:center;gap:12px;height:32px;padding:0 14px;display:flex}.qu-cell-tag{font-family:var(--font-mono);color:var(--gold);font-size:11px;font-weight:500}.qu-cell-kind{font-family:var(--font-mono);color:var(--text-tertiary);font-size:11px}.qu-cell-run{font-family:var(--font-ui);color:var(--gold-bright);letter-spacing:.3px;margin-left:auto;font-size:11px;font-weight:600}.qu-code{padding:14px 16px}.qu-output{border:1px solid var(--border);background:var(--bg-elevated);border-radius:10px;grid-template-columns:56px 1fr;align-items:center;gap:12px;padding:14px 16px;display:grid}.qu-output-tag{font-family:var(--font-mono);color:var(--text-tertiary);font-size:11px}.qu-output-body{flex-wrap:wrap;align-items:center;gap:18px;display:flex}.qu-output-cap{font-family:var(--font-ui);color:var(--text-secondary);font-size:12.5px;font-style:italic}.qu-output-spark{flex:1;min-width:110px;max-width:160px;display:flex}.qu-output-stat{text-align:right;flex-direction:column;gap:2px;display:flex}.qu-output-stat-val{font-family:var(--font-mono);color:var(--gold);font-size:18px;font-weight:500;line-height:1}.qu-output-stat-lbl{font-family:var(--font-ui);letter-spacing:.8px;text-transform:uppercase;color:var(--text-tertiary);font-size:9.5px;font-weight:600}.qu-lesson-nav{justify-content:space-between;align-items:center;gap:14px;margin-top:auto;padding-top:6px;display:flex}.qu-nav-prev{font-family:var(--font-ui);color:var(--text-secondary);border:1px solid var(--border-strong);background:0 0;border-radius:9px;padding:10px 18px;font-size:13px;font-weight:600;transition:border-color .15s,color .15s}.qu-nav-prev:hover{color:var(--text-primary);border-color:var(--text-tertiary)}.qu-nav-next{font-family:var(--font-ui);color:var(--text-on-gold);background:var(--gold);border:1px solid var(--gold);border-radius:9px;padding:10px 22px;font-size:13px;font-weight:700;transition:background .15s}.qu-nav-next:hover{background:var(--gold-bright)}.qu-side-right{background:var(--bg-elevated)}.qu-progress{border:1px solid var(--gold-tint-30);background:var(--gold-tint-06);border-radius:12px;align-items:center;gap:16px;padding:16px;display:flex}.qu-progress-ring{background:radial-gradient(closest-side, var(--bg-elevated) 78%, transparent 79% 100%), conic-gradient(var(--gold-bright) 0% 38%, var(--border) 38% 100%);border-radius:50%;flex-direction:column;flex-shrink:0;justify-content:center;align-items:center;gap:1px;width:72px;height:72px;display:flex}.qu-progress-ring-val{font-family:var(--font-mono);color:var(--gold-bright);font-size:18px;font-weight:500;line-height:1}.qu-progress-ring-lbl{font-family:var(--font-ui);letter-spacing:.8px;text-transform:uppercase;color:var(--text-tertiary);font-size:8.5px;font-weight:700}.qu-progress-meta{flex-direction:column;gap:12px;min-width:0;display:flex}.qu-level{font-family:var(--font-ui);color:var(--text-primary);font-size:13px;font-weight:700;line-height:1.3}.qu-progress-stats{gap:18px;display:flex}.qu-pstat{flex-direction:column;gap:2px;display:flex}.qu-pstat-val{font-family:var(--font-mono);color:var(--text-primary);font-size:15px;font-weight:500;line-height:1}.qu-pstat-lbl{font-family:var(--font-ui);letter-spacing:.6px;text-transform:uppercase;color:var(--text-tertiary);font-size:9px;font-weight:600}.qu-badge{border:1px solid var(--gold-tint-30);background:var(--gold-tint-08);border-radius:10px;align-items:center;gap:11px;padding:12px 14px;display:flex}.qu-badge-mark{width:26px;height:26px;color:var(--text-on-gold);background:var(--gold);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:12px;font-weight:700;display:flex}.qu-badge-txt{flex-direction:column;gap:2px;display:flex}.qu-badge-kind{font-family:var(--font-ui);letter-spacing:.9px;text-transform:uppercase;color:var(--gold);font-size:9px;font-weight:700}.qu-badge-name{font-family:var(--font-ui);color:var(--text-primary);font-size:13px;font-weight:600}.qu-upnext{flex-direction:column;display:flex}.qu-up{border-bottom:1px solid var(--border);align-items:center;gap:11px;padding:11px 14px;display:flex}.qu-up:last-child{border-bottom:none}.qu-up-dot{background:var(--border-strong);border:1px solid var(--text-tertiary);border-radius:50%;flex-shrink:0;width:7px;height:7px}.qu-up-txt{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.qu-up-name{font-family:var(--font-ui);color:var(--text-primary);font-size:12.5px;font-weight:600;line-height:1.3}.qu-up-meta{font-family:var(--font-ui);color:var(--text-tertiary);white-space:nowrap;text-overflow:ellipsis;font-size:10.5px;overflow:hidden}.qu-up-dur{font-family:var(--font-mono);color:var(--text-tertiary);font-variant-numeric:tabular-nums;flex-shrink:0;font-size:11px}.qu-publish-note{font-family:var(--font-ui);color:var(--text-secondary);border:1px dashed var(--border-strong);background:var(--bg-page);border-radius:10px;padding:13px 14px;font-size:12px;line-height:1.6}.qu-publish-hl{color:var(--gold);font-weight:600}@media (width<=860px){.qu{grid-template-columns:1fr}.qu-side-left{order:2}.qu-main{order:1}.qu-side-right{order:3}.qu-tracks{flex-flow:wrap}.qu-track{border-bottom:1px solid var(--border);flex:calc(50% - 1px)}}