.kk-panel{background:var(--sim-bg);color:var(--sim-ink);border-radius:var(--radius);margin:20px 0;padding:12px}.kk-panel svg:not(.katex svg){touch-action:manipulation;width:100%;height:auto;display:block}.kk-panel text{font-family:var(--font)}.kk-panel .sim-btn{color:var(--sim-ink);background:#16212f;border-color:#33445a}.kk-panel .sim-btn:hover:not(:disabled){border-color:var(--accent)}.kk-panel .sim-btn:disabled{opacity:.45;cursor:default}.kk-panel .sim-btn[aria-pressed=true]{background:var(--accent);border-color:var(--accent);color:#fff}.kk-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.kk-row+.kk-row{margin-top:8px}.kk-caption{margin:8px 0 0;font-size:15.5px;line-height:1.6}.kk-dim{color:var(--sim-dim);font-size:14px}.kk-src{color:var(--sim-dim);margin:6px 0 0;font-size:12.5px;line-height:1.5}.kk-readout{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:6px 10px;margin-top:8px;display:grid}.kk-readout>div{background:#142033;border-radius:8px;min-width:0;padding:6px 10px}.kk-readout span{color:var(--sim-dim);font-size:13px;display:block}.kk-readout b{font-variant-numeric:tabular-nums;font-size:17px}.kk-slider{grid-template-columns:minmax(0,1fr);gap:2px;margin-top:10px;font-size:15px;display:grid}.kk-slider label{flex-wrap:wrap;justify-content:space-between;gap:8px;display:flex}.kk-slider input[type=range]{width:100%;height:40px;accent-color:var(--accent)}.kk-tex{margin-top:6px;font-size:15px;overflow-x:auto}.kk-tex .katex-display{margin:.4em 0}.kk-steps{border-top:1px solid #263448;gap:6px;margin:12px 0 0;padding:10px 0 0;font-size:14.5px;list-style:none;display:grid}.kk-steps li{color:var(--sim-dim);grid-template-columns:24px 1fr;gap:8px;display:grid}.kk-steps li span{border:1.5px solid #46586f;border-radius:50%;place-items:center;width:22px;height:22px;font-size:12px;font-weight:700;display:grid}.kk-steps li[data-done]{color:var(--sim-ink)}.kk-steps li[data-done] span{background:var(--good);border-color:var(--good);color:#fff}.kk-legend{color:var(--sim-dim);flex-wrap:wrap;gap:4px 14px;margin-top:4px;font-size:13.5px;display:flex}.kk-legend i{vertical-align:-1px;border-radius:50%;width:12px;height:12px;margin-right:5px;display:inline-block}.kk-good{color:#7ee29a}.kk-bad{color:#ff9b8f}.kk-warn{color:#ffd36b}.kk-hook .ves-wall{fill:#c8dcff0d;stroke:#8aa0bb;stroke-width:2px}.kk-hook .piston{fill:#5d6f86;stroke:#a9bad0;stroke-width:1.5px;transition:transform .5s}.kk-hook .heater{fill:#2a3546;transition:fill .6s}.kk-hook[data-hot] .heater{fill:#c2452d}.kk-hook .heater-glow{fill:#ff7a45;opacity:0;transition:opacity .6s}.kk-hook[data-hot] .heater-glow{opacity:.35}.kk-hook .lbl{fill:var(--sim-ink);text-anchor:middle;font-size:28px}.kk-hook .lbl.dim{fill:var(--sim-dim);font-size:24px}.kk-hook .mol{transition:transform .5s,opacity .4s}.kk-hook .drift{animation:kk-drift var(--d,3s) ease-in-out var(--dl,0s) infinite alternate}.kk-hook[data-paused] .drift{animation-play-state:paused}@keyframes kk-drift{0%{transform:translate(-4px,3px)}to{transform:translate(4px,-3px)}}.kk-hook .crystal{fill:#e9ef9c;stroke:#9aa35a;stroke-width:1px;transition:opacity .6s}.kk-hook[data-hot] .crystal{opacity:0}.kk-hook[data-reduced] *{transition:none!important;animation:none!important}.kk-vs{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:8px;margin-top:8px;display:grid}.kk-vs>div{background:#142033;border-radius:8px;min-width:0;padding:8px 10px;font-size:14.5px;line-height:1.55}.kk-vs h4{margin:0 0 2px;font-size:15px}.kk-vs b{font-variant-numeric:tabular-nums}.kk-plot .axis{stroke:#56677e;stroke-width:1.5px}.kk-plot .grid{stroke:#233247;stroke-width:1px}.kk-plot .tick{fill:var(--sim-dim);text-anchor:middle;font-size:23px}.kk-plot .tick.end{text-anchor:end}.kk-plot .tick.start{text-anchor:start}.kk-plot .lab{fill:var(--sim-ink);font-size:25px}.kk-plot .lab.mid{text-anchor:middle}.kk-plot .drag{cursor:ew-resize}.kk-plot .handle{fill:#ffd36b;stroke:#fff;stroke-width:2px}.kk-ice-wrap{margin-top:10px;overflow-x:auto}.lesson .kk-ice,.kk-ice{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:15px;display:table}.kk-ice th,.kk-ice td{text-align:center;border:1px solid #2c3c52;padding:6px}.kk-ice th{color:var(--sim-dim);font-size:13.5px;font-weight:600}.kk-ice th.row-h{text-align:left;white-space:nowrap}.kk-ice td.drop{cursor:pointer;background:#121c2b;border-style:dashed;border-color:#46586f;min-width:64px;height:46px}.kk-ice td.drop[data-over],.kk-ice td.drop:hover{border-color:var(--accent);background:#1b2a40}.kk-ice td.drop[data-state=right]{background:#13321f;border-style:solid;border-color:#2f8a4c;font-weight:700}.kk-ice td.drop[data-state=wrong]{background:#3a1d1d;border-style:solid;border-color:#b4553f}.kk-chips{flex-wrap:wrap;align-items:center;gap:10px;margin-top:10px;display:flex}.kk-chip{min-width:64px;min-height:44px;color:var(--sim-ink);font:inherit;cursor:grab;touch-action:none;user-select:none;background:#1d2a3b;border:2px solid #6f88a8;border-radius:22px;font-size:18px;font-weight:700}.kk-chip[aria-pressed=true]{border-color:#ffd36b;box-shadow:0 0 0 3px #ffd36b40}.kk-ghost{z-index:50;pointer-events:none;color:#fff;background:#1d2a3b;border:2px solid #ffd36b;border-radius:22px;padding:8px 14px;font-size:18px;font-weight:700;position:fixed;transform:translate(-50%,-50%)}.kk-qk .zone-r{fill:#3a2430}.kk-qk .zone-b{fill:#1f2c3f}.kk-qk .zone-p{fill:#1d3526}.kk-qk .kmark{stroke:#ffd36b;stroke-width:4px}.kk-qk .qmark{stroke:#7cc4ff;stroke-width:4px}.kk-qk .dir{stroke:#7cc4ff;stroke-width:4px;fill:none}.kk-qk .ex{cursor:pointer}.kk-qk .ex circle{fill:#c9d6e6;stroke:#0e1726;stroke-width:2px}.kk-qk .ex[data-on] circle{fill:#ffd36b}.it-tabs{margin-bottom:10px}.it-tabs .sim-btn{font-size:14.5px}.it-rx{margin-bottom:4px}.it-eq{flex-wrap:wrap;align-items:center;gap:4px 10px;display:flex}.it-eq .tex-block{flex:260px;min-width:0}.it-badge{background:var(--accent-soft);color:var(--text);border-radius:999px;padding:2px 10px;font-size:13.5px;font-weight:600;display:inline-block}.it-badge.warn{background:var(--warn-soft);font-weight:400}.it-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:8px;display:grid}@media (width<=860px){.it-grid{grid-template-columns:minmax(0,1fr)}}.it-box{border:1px solid var(--border);border-radius:var(--radius);min-width:0;margin:0;padding:8px 12px 12px}.it-box legend{padding:0 4px;font-size:15px;font-weight:600}.it-dim{color:var(--text-muted);font-size:13.5px}.it-fields{grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px;margin-top:8px;display:grid}.it-fields label{gap:3px;min-width:0;font-size:14px;display:grid}.it-fields input{border:1px solid var(--border);background:var(--bg);width:100%;min-height:42px;color:var(--text);font:inherit;font-variant-numeric:tabular-nums;border-radius:8px;padding:0 10px;font-size:16px}.it-fields input[aria-invalid],.it-answer input[aria-invalid]{border-color:#c0412f}.it-dot{vertical-align:-1px;border:1px solid #00000059;border-radius:50%;width:11px;height:11px;margin-right:5px;display:inline-block}.it-slider{margin-top:8px}.it-slider label{font-size:14px}.it-k{margin-top:8px}.it-calc .kk-readout>div{background:var(--surface-2)}.it-calc .kk-readout span{color:var(--text-muted)}.it-warn{background:var(--warn-soft);border-radius:8px;margin:12px 0 0;padding:10px 12px}.it-dir{background:var(--accent-soft);border-radius:8px;margin-top:12px;padding:10px 12px;font-size:15.5px;line-height:1.6}.it-dir[data-dir=reverse]{background:var(--warn-soft)}.it-dir[data-dir=equilibrium]{background:var(--good-soft)}.it-table-wrap{margin-top:10px;overflow-x:auto}.lesson .it-table,.it-table{border-collapse:collapse;font-variant-numeric:tabular-nums;width:100%;font-size:14.5px;display:table}.it-table th,.it-table td{border:1px solid var(--border);text-align:right;white-space:nowrap;padding:6px 8px}.it-table thead th{text-align:center}.it-table tbody th{text-align:left;color:var(--text-muted);font-size:13.5px;font-weight:600}.it-table td.neg{color:#b4553f}.it-table td.pos{color:var(--good)}.it-table tr.eqrow td{background:var(--surface-2);font-weight:700}.it-bars{background:var(--sim-bg);border-radius:var(--radius);width:100%;max-width:620px;height:auto;margin:12px auto 0;display:block}.it-bars .bar0{fill:none;stroke:var(--sim-dim);stroke-width:2.5px;stroke-dasharray:6 4}.it-bars .bar1{stroke:#0e1726;stroke-width:1px}.it-bars .base{stroke:#56677e;stroke-width:2px}.it-bars .bl{fill:var(--sim-ink);text-anchor:middle;font-size:22px;font-family:var(--font)}.it-legend{color:var(--text-muted);justify-content:center}.it-sum{margin-top:10px}.it-tex{margin-top:8px;overflow-x:auto}.it-approx{border:1px dashed var(--border);border-radius:8px;margin-top:8px;padding:10px 12px;font-size:15px;line-height:1.6}.it-approx .kk-bad{color:#c0412f}.it-approx .kk-good{color:var(--good)}.it-card{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface-2);margin-top:10px;padding:12px 14px}.it-card-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;display:flex}.it-q{margin:10px 0;font-size:16.5px;line-height:1.7}.it-answer{flex-wrap:wrap;align-items:end;gap:8px;display:flex}.it-answer label{flex:200px;gap:3px;min-width:0;font-weight:600;display:grid}.it-answer input{border:1px solid var(--border);background:var(--bg);min-height:44px;color:var(--text);font:inherit;border-radius:8px;width:100%;padding:0 10px;font-size:17px}.it-verdict{border-radius:8px;margin:10px 0 0;padding:8px 12px;font-size:15.5px}.it-verdict.right{background:var(--good-soft)}.it-verdict.approx{background:var(--warn-soft)}.it-verdict.wrong{color:#6b1f12;background:#f9dcd6}:root[data-theme=dark] .it-verdict.wrong{color:#ffd2c9;background:#3a1d1d}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .it-verdict.wrong{color:#ffd2c9;background:#3a1d1d}}.it-bottom{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:12px;margin-top:14px;display:grid}@media (width<=860px){.it-bottom{grid-template-columns:minmax(0,1fr)}}