.subject-hero{display:flex;align-items:center;gap:18px;margin:20px 0 28px}.s-badge{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;background:var(--warm-dim)}.subject-hero h2{font-size:1.5rem}.subject-hero p{font-size:.85rem;color:var(--text-secondary)}.tabs{display:flex;gap:2px;border-bottom:1px solid var(--border);margin-bottom:28px;overflow-x:auto}.tab{padding:12px 20px;font-size:.85rem;font-weight:500;color:var(--text-dim);border:none;border-bottom:2px solid transparent;background:none;font-family:inherit;transition:all .2s;white-space:nowrap;text-decoration:none;cursor:pointer;display:inline-block}.tab:hover{color:var(--text);text-decoration:none}.tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:700}.sim-intro{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:12px 16px;margin-bottom:20px;font-size:.88rem;color:var(--text-secondary)}.algo-selector{margin-bottom:20px;display:flex;flex-direction:column;gap:6px}.sel-label{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--text-dim)}.sel{padding:10px 14px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:.88rem;font-family:Satoshi,sans-serif;cursor:pointer;transition:border-color .15s}.sel:focus{outline:none;border-color:var(--accent)}.sim-layout{display:grid;grid-template-columns:340px 1fr;gap:16px;margin-bottom:12px}.pseudo-panel,.trace-panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;overflow:hidden}.panel-title{padding:10px 16px;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:1px;color:var(--accent);border-bottom:1px solid var(--border);background:var(--surface-2)}.pseudo-code{padding:12px 0;font-family:Courier New,monospace;font-size:.82rem}.pline{display:flex;align-items:baseline;gap:10px;padding:3px 14px;transition:background .15s}.pline-active{background:color-mix(in srgb,var(--accent) 15%,transparent)}.pline-num{width:18px;text-align:right;color:var(--text-dim);font-size:.72rem;flex-shrink:0}.pline-text{color:var(--text-secondary);white-space:pre}.pline-active .pline-text{color:var(--accent);font-weight:600}.input-row{display:flex;align-items:flex-end;gap:10px;padding:12px 14px;border-top:1px solid var(--border);flex-wrap:wrap}.input-fields{display:flex;gap:10px;flex-wrap:wrap;flex:1}.inp-label{font-size:.8rem;font-weight:600;color:var(--text-secondary);display:flex;flex-direction:column;gap:4px}.inp-field{padding:7px 10px;border-radius:8px;border:1px solid var(--border);background:var(--surface-2);color:var(--text);font-family:monospace;font-size:.88rem;width:80px}.inp-field:focus{outline:none;border-color:var(--accent)}.run-btn{padding:8px 18px;background:var(--accent);color:#fff;border:none;border-radius:8px;font-family:inherit;font-size:.85rem;font-weight:700;cursor:pointer;white-space:nowrap;transition:opacity .15s}.run-btn:hover{opacity:.85}.trace-wrap{overflow-x:auto;overflow-y:auto;max-height:380px}.trace-hint{padding:40px 20px;text-align:center;color:var(--text-dim);font-size:.88rem}.trace-table{width:100%;border-collapse:collapse;font-size:.8rem}.trace-table th{padding:8px 12px;background:var(--surface-2);border-bottom:1px solid var(--border);text-align:left;font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--text-dim);white-space:nowrap;position:sticky;top:0}.trace-table td{padding:7px 12px;border-bottom:1px solid var(--border);color:var(--text-secondary);vertical-align:top}.trace-current td{background:color-mix(in srgb,var(--accent) 12%,var(--surface));color:var(--text)}.trace-num{color:var(--text-dim);font-size:.72rem}.trace-changed{color:var(--accent);font-weight:700}.trace-action{font-family:Courier New,monospace;font-size:.78rem}.trace-out{font-weight:700;color:var(--accent)}.output-box{margin:8px 0;padding:10px 16px;background:var(--accent-dim);border:1px solid var(--accent);border-radius:8px;font-size:.9rem}.out-label{color:var(--text-dim);font-size:.78rem;font-weight:700;text-transform:uppercase;margin-right:8px}.out-val{color:var(--accent);font-weight:700;font-family:monospace;font-size:1rem}.step-controls{display:flex;align-items:center;gap:12px;justify-content:center;padding:10px 0 40px}.ctrl-btn{padding:8px 20px;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-family:inherit;font-size:.85rem;cursor:pointer;transition:all .15s}.ctrl-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.ctrl-btn:disabled{opacity:.35;cursor:default}.step-info{font-size:.82rem;color:var(--text-dim);min-width:120px;text-align:center}@media(max-width:700px){.sim-layout{grid-template-columns:1fr}.pseudo-code{font-size:.75rem}}