.bl-ix{margin:2rem 0;padding:1.25rem 1.25rem 1rem;border:1px solid var(--line);border-radius:12px;background:var(--raised)}
.bl-ix-h{margin:0 0 .35rem;font:600 1.05rem/1.3 var(--f-display,inherit)}
.bl-ix-lede{margin:0 0 1rem;color:var(--muted);font-size:.93rem;line-height:1.5}
.bl-ix-form{display:grid;gap:.6rem;margin:0 0 1rem}
.bl-ix-row{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.bl-ix-row label{font-size:.92rem}
.bl-ix-row input{width:6.5rem;padding:.35rem .5rem;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--text);font:inherit;font-size:.92rem;text-align:right}
.bl-ix-note{margin:.25rem 0 0;color:var(--faint);font-size:.82rem}
.bl-ix-out{display:block;padding:.85rem 1rem;border-radius:9px;background:var(--bg-2);border:1px solid var(--line-soft)}
.bl-ix-big{margin:0;font-size:1.05rem}
.bl-ix-sub{margin:.3rem 0 0;color:var(--muted);font-size:.9rem}
.bl-ix-table{width:100%;margin:1rem 0 .5rem;border-collapse:collapse;font-size:.88rem}
.bl-ix-table caption{text-align:left;color:var(--faint);font-size:.82rem;padding-bottom:.4rem}
.bl-ix-table th,.bl-ix-table td{border-top:1px solid var(--line-soft);padding:.4rem .5rem;text-align:left}
.bl-ix-foot{margin:.25rem 0 0;color:var(--faint);font-size:.82rem}
.bl-ix-nojs{margin:0 0 .25rem;color:var(--faint);font-size:.85rem}
/* With JavaScript the live figure leads and the worked table becomes support. */
.bl-ix[data-live] .bl-ix-nojs{display:none}
.bl-ix:not([data-live]) .bl-ix-form,.bl-ix:not([data-live]) .bl-ix-out{display:none}
.bl-ix-fig{margin:2rem 0}
.bl-ix-scroll{position:relative;overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:8px}
.bl-ix-scroll:focus-visible{outline:2px solid var(--violet-hi);outline-offset:2px}
.bl-body .bl-ix .bl-ix-hint{display:none;margin:.4rem 0 0;font-size:.82rem;color:var(--faint)}
@media (max-width:640px){.bl-body .bl-ix .bl-ix-hint{display:block}}
.bl-ix-tl{display:block;width:100%;min-width:600px;height:auto;font-family:var(--f-ui,inherit)}
.bl-ix-tl .tl-lane{fill:var(--muted);font-size:13px;font-weight:600}
.bl-ix-tl .tl-in{fill:var(--text);font-size:14px;font-weight:600}
.bl-ix-tl .tl-small{fill:var(--muted);font-size:12px}
.bl-ix-tl .tl-a{fill:var(--violet-lo)}
.bl-ix-tl .tl-b{fill:var(--surface);stroke:var(--line)}
.bl-ix-tl .tl-res{fill:url(#ix-tl-hatch);stroke:var(--amber);stroke-dasharray:4 3}
.bl-ix-tl .tl-hatch-bg{fill:var(--amber-wash)}
.bl-ix-tl .tl-hatch-line{stroke:var(--amber);stroke-width:2;opacity:.45}
.bl-ix-tl .tl-slow{fill:var(--amber);opacity:.35}
.bl-ix-tl .tl-gap{fill:none;stroke:var(--muted);stroke-dasharray:5 4}
.bl-ix-tl .tl-int{stroke:var(--amber);stroke-width:2.5}
.bl-ix-tl .tl-int-t{fill:var(--amber);font-size:13px;font-weight:700}
.bl-ix-tl .tl-ret{stroke:var(--faint);stroke-width:1.5;stroke-dasharray:3 3}
.bl-ix-tl .tl-num{fill:var(--violet-wash);stroke:var(--violet-hi);stroke-width:1.5}
.bl-ix-tl .tl-num-t{fill:var(--violet-ink);font-size:12px;font-weight:700}
.bl-ix-tl .tl-lead{stroke:var(--violet-hi);stroke-width:1.5}
.bl-ix-tl .tl-axis{stroke:var(--faint);stroke-width:1.5}
.bl-ix-tl .tl-axis-h{fill:var(--faint)}
.bl-ix-legend{margin:1rem 0 .5rem;padding-left:1.4rem;display:grid;gap:.35rem;font-size:.92rem;line-height:1.5}
.bl-ix-legend li::marker{color:var(--violet-ink);font-weight:700}
/* The post body sets every p and li to 18px (.bl-body p, .bl-body li), which
   outranks a single class. Small print inside a block is meant to be small. */
.bl-body .bl-ix .bl-ix-lede{font-size:.95rem;line-height:1.55}
.bl-body .bl-ix .bl-ix-foot,.bl-body .bl-ix .bl-ix-nojs,.bl-body .bl-ix .bl-ix-note{font-size:.85rem;line-height:1.55}
.bl-body .bl-ix .bl-ix-legend li{font-size:.95rem;line-height:1.55;margin:.2rem 0}
.bl-body .bl-ix .bl-ix-flow li{font-size:.88rem;line-height:1.45;margin:0}
.bl-body .bl-ix .bl-ix-flow li+li{margin-top:1.1rem}
.bl-body .bl-ix .bl-ix-flow-f{font-size:.85rem;line-height:1.45;margin:.7rem 0 0}
.bl-body .bl-ix .bl-ix-flow ol{padding:0;margin:0}
.bl-body .bl-ix .bl-ix-qq{font-size:.95rem;line-height:1.5;margin:0 0 .45rem}
.bl-body .bl-ix .bl-ix-quiz>li{margin:0}
.bl-body .bl-ix .bl-ix-qf,.bl-body .bl-ix .bl-ix-qw{font-size:.88rem;line-height:1.45;margin:.35rem 0 0}
.bl-ix-cmp-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin:.75rem 0}
@media (max-width:640px){.bl-ix-cmp-grid{grid-template-columns:1fr}}
.bl-ix-flow{border:1px solid var(--line-soft);border-radius:10px;padding:.9rem 1rem;background:var(--bg-2)}
.bl-ix-flow-h{margin:0 0 .6rem;font-weight:700;font-size:.95rem}
.bl-ix-flow.is-cpu .bl-ix-flow-h{color:var(--violet-ink)}
.bl-ix-flow.is-human .bl-ix-flow-h{color:var(--amber)}
.bl-ix-flow ol{list-style:none;margin:0;padding:0;display:grid;gap:0;counter-reset:fl}
.bl-ix-flow li{counter-increment:fl;position:relative;padding:.55rem .7rem .55rem 2.3rem;border:1px solid var(--line);border-radius:8px;background:var(--surface);font-size:.88rem;line-height:1.45}
.bl-ix-flow li::before{content:counter(fl);position:absolute;left:.6rem;top:.55rem;width:1.2rem;height:1.2rem;border-radius:50%;display:grid;place-items:center;font-size:.72rem;font-weight:700;background:var(--violet-wash);color:var(--violet-ink)}
.bl-ix-flow li+li{margin-top:1.1rem}
.bl-ix-flow li+li::after{content:"";position:absolute;left:1.15rem;top:-1.05rem;height:.95rem;border-left:2px solid var(--faint)}
.bl-ix-flow.is-cpu li.is-key{border-color:var(--violet-hi);box-shadow:0 0 0 3px var(--violet-wash)}
.bl-ix-flow.is-human li.is-key{border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-wash)}
.bl-ix-flow-f{margin:.7rem 0 0;color:var(--muted);font-size:.84rem;line-height:1.45}
.bl-ix[data-ix="switch-cost"] .bl-ix-foot{line-height:1.5}
.bl-ix-quiz{margin:0;padding-left:1.3rem;display:grid;gap:.9rem}
.bl-ix-qq{margin:0 0 .45rem;font-size:.93rem;line-height:1.5}
.bl-ix-qb{display:flex;flex-wrap:wrap;gap:.4rem}
.bl-ix-qb button{font:inherit;font-size:.84rem;padding:.35rem .7rem;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--text);cursor:pointer}
.bl-ix-qb button:hover{border-color:var(--violet-hi)}
.bl-ix-qb button[aria-pressed="true"].is-right{border-color:var(--green);background:rgba(95,196,140,.14)}
.bl-ix-qb button[aria-pressed="true"].is-wrong{border-color:var(--amber);background:var(--amber-wash)}
.bl-ix-qb button.is-answer{border-color:var(--green)}
.bl-ix-qf{margin:.4rem 0 0;font-size:.86rem;font-weight:600}
.bl-ix-qf:empty{display:none}
.bl-ix-qw{margin:.2rem 0 0;font-size:.86rem;color:var(--muted)}
.bl-ix-score{margin:1rem 0 0;font-weight:600}
.bl-ix-score:empty{display:none}
/* Without JavaScript: the answer table is the block. With it: the quiz. */
.bl-ix[data-ix="switch-kind-quiz"]:not([data-live]) .bl-ix-quiz,.bl-ix[data-ix="switch-kind-quiz"]:not([data-live]) .bl-ix-lede{display:none}
.bl-ix[data-ix="switch-kind-quiz"][data-live] .bl-ix-key{display:none}
.bl-ix[data-ix="ai-time-check"] .bl-ix-foot{line-height:1.5}
.bl-ix-tqs{gap:.9rem}
.bl-ix-tq{margin:0;padding:0;border:0;display:flex;flex-wrap:wrap;gap:.4rem}
.bl-ix-tq legend{width:100%;margin:0 0 .4rem;font-size:.93rem;font-weight:600}
.bl-ix-tq label{display:inline-flex;align-items:center;gap:.35rem;padding:.3rem .65rem;border:1px solid var(--line);border-radius:999px;font-size:.85rem;cursor:pointer;background:var(--surface)}
.bl-ix-tq label:has(input:checked){border-color:var(--violet-hi)}
.bl-ix-tq input{margin:0;accent-color:var(--violet-hi)}
.bl-ix[data-ix="ai-task-check"] .bl-ix-out[data-tone="stop"]{border-color:var(--amber)}
.bl-ix[data-ix="ai-task-check"] .bl-ix-out[data-tone="go"]{border-color:var(--green)}
.bl-ix-ab-f{display:grid;gap:.3rem}
.bl-ix-ab-f label{font-size:.92rem}
.bl-ix-ab-f input,.bl-ix-ab-f textarea{width:100%;box-sizing:border-box;padding:.45rem .6rem;border:1px solid var(--line);border-radius:7px;background:var(--surface);color:var(--text);font:inherit;font-size:.92rem;resize:vertical}
.bl-ix-ab-cbs{margin:0;padding:0;border:0;display:grid;gap:.35rem}
.bl-ix-ab-cbs legend{font-size:.92rem;margin:0 0 .3rem}
.bl-ix-ab-cb{display:flex;align-items:center;gap:.45rem;font-size:.9rem}
.bl-ix-ab-cb input{accent-color:var(--violet-hi)}
.bl-ix-ab-out{margin:0;padding:.85rem 1rem;border-radius:9px;background:var(--bg-2);border:1px solid var(--line-soft);white-space:pre-wrap;font:inherit;font-size:.9rem;line-height:1.55}
.bl-ix-ab-actions{margin:.6rem 0 0;font-size:.85rem;color:var(--faint)}
.bl-ix-ab-actions button{font:inherit;font-size:.86rem;padding:.35rem .8rem;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--text);cursor:pointer}
.bl-ix-ab-actions button:hover{border-color:var(--violet-hi)}