.deck {
  --accent: #e03131;
  --accent-deep: #a82424;
  --accent-soft: #fde4e4;
  --accent-ink: #fff;
  --amber: #e8590c;
  --amber-soft: #fff0e0;
  --b: #1c7ed6;
  --c: #7048e8;
}

/* Title: three nodes, one link in doubt */
.title-slide { flex-direction: row; align-items: center; gap: clamp(28px, 6vw, 80px); }
.title-slide h1 { font-size: clamp(2.4rem, 4.4vw + 0.5rem, 4.6rem); max-width: 12ch; }
.title-slide .lead { font-size: clamp(1.05rem, 0.8vw + 0.8rem, 1.3rem); max-width: 46ch; }
.hero-net { flex: none; width: min(100%, 360px); }
.hero-net svg { width: 100%; display: block; }
.hn-link { stroke: var(--ink); stroke-width: 3; }
.hn-link.broken { stroke: var(--accent); stroke-dasharray: 8 7; }
.hn-pkt { fill: var(--ok); }
.hn-cut circle { fill: var(--accent); }
.hn-cut text { fill: #fff; font: 700 22px var(--font); text-anchor: middle; }
.hn-node rect { fill: var(--panel); stroke: var(--ink); stroke-width: 2.5; }
.hn-node.lead rect { fill: var(--ink); }
.hn-node text { font: 700 18px var(--mono); text-anchor: middle; fill: var(--ink); }
.hn-node text.sm { font: 500 11px var(--font); fill: var(--muted); }
.hn-node.lead text { fill: #fff; }
.hn-node.lead text.sm { fill: #f7c4c4; }
@media (max-width: 900px) {
  .title-slide { flex-direction: column-reverse; align-items: stretch; }
  .hero-net { width: min(100%, 300px); margin: 0 auto; }
}

/* Shared local helpers */
.sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 6px; }
.btn.danger { border-color: var(--block); color: var(--block); }
.btn.danger:hover:not(:disabled) { background: var(--block-soft); }
.bl-legend { display: flex; gap: 6px 14px; align-items: center; flex-wrap: wrap; font-size: 0.78em; color: var(--muted); }
.bl-legend .sw { margin-right: -8px; }
.sw.okc { background: var(--ok); }
.sw.rejc { background: var(--block); }
.sw.downc { background: repeating-linear-gradient(-45deg, #e3e8ec 0 3px, #c9d2da 3px 6px); }
.sw.fastc { background: var(--panel); border: 1.5px dashed var(--muted); }
.sw.probec { background: var(--amber-soft); border: 2px solid var(--amber); }
.sw.bc { background: var(--b); }
.sw.cc { background: var(--c); }
.sw.freec { background: var(--panel); border: 1px solid var(--line); }
.seg { gap: 6px; }
.stats.two { grid-template-columns: 1fr 1fr; }
.more { font-size: 0.75em; color: var(--muted); font-family: var(--mono); align-self: center; }
.demo .note { font-size: 0.82em; }

/* Fallacies */
.fallacies { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.fl { background: var(--panel); border: 1px solid var(--line); border-top: 4px solid var(--accent); border-radius: 10px; padding: 10px 12px; display: flex; flex-direction: column; gap: 4px; }
.fl b { font-size: 0.98em; }
.fl span { font-size: 0.84em; color: var(--muted); }
@media (max-width: 1000px) { .fallacies { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 480px) { .fallacies { grid-template-columns: 1fr; } }

/* Partial failure */
.pf-lane { display: grid; grid-template-columns: minmax(0, 1fr) minmax(50px, 1.1fr) minmax(0, 1fr); align-items: center; gap: 8px; }
.pf-box { border: 2px solid var(--ink); border-radius: 10px; padding: 8px 10px; display: flex; flex-direction: column; gap: 4px; min-height: 104px; background: var(--panel); }
.pf-state { font-weight: 700; font-size: 0.9em; }
.pf-state.wait, .pf-state.work { color: var(--amber); }
.pf-state.ok, .pf-state.done { color: #00756e; }
.pf-state.timeout { color: var(--block); }
.pf-timer { display: flex; flex-direction: column; gap: 2px; }
.pf-timer small { font-size: 0.7em; color: var(--muted); }
.pf-timer .track { flex: none; height: 6px; }
.pf-timer .track.over .fill { background: var(--block); }
.pf-big { font-size: 0.85em; }
.pf-big b { font-size: 1.4em; color: var(--accent-deep); }
.pf-wire { position: relative; height: 4px; background: var(--line); border-radius: 2px; }
.pf-dot { position: absolute; top: 50%; width: 16px; height: 16px; margin: -8px 0 0 -8px; border-radius: 50%; background: var(--ink); }
.pf-dot.back { background: var(--ok); }
.pf-lost { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -55%); color: var(--block); font-size: 1.6em; line-height: 1; }

/* Timeouts */
.to-chart { position: relative; padding-bottom: 18px; }
.to-hist { position: relative; height: 120px; display: flex; align-items: flex-end; gap: 1px; border-bottom: 1.5px solid var(--ink); }
.to-hist i { flex: 1; background: var(--ink); opacity: 0.8; border-radius: 2px 2px 0 0; min-width: 0; }
.to-hist i.cut { background: var(--block); opacity: 0.85; }
.to-mark { position: absolute; top: -4px; bottom: -4px; width: 3px; margin-left: -1.5px; background: var(--accent); border-radius: 2px; }
.to-axis { position: absolute; left: 0; right: 0; bottom: 0; height: 16px; }
.to-axis span { position: absolute; transform: translateX(-50%); font-size: 0.7em; color: var(--muted); font-family: var(--mono); white-space: nowrap; }
.to-pct { font-size: 0.82em; color: var(--muted); }
.to-pct b { color: var(--ink); font-family: var(--mono); }

/* Retry storm */
.st-sl { flex: 1; min-width: 200px; }
.st-wrap { position: relative; padding-bottom: 18px; }
.st-chart { position: relative; height: 140px; display: flex; align-items: flex-end; gap: 1px; border-bottom: 1.5px solid var(--ink); }
.st-bar { flex: 1; min-width: 0; height: 100%; display: flex; flex-direction: column-reverse; position: relative; z-index: 1; }
.st-bar .ok { background: var(--ok); }
.st-bar .rej { background: var(--block); opacity: 0.8; }
.st-bar em { position: absolute; top: -2px; left: 50%; transform: translateX(-50%); font-style: normal; font-size: 0.55em; color: var(--block); line-height: 1; }
.st-down { position: absolute; left: 0; top: 0; bottom: 0; background: repeating-linear-gradient(-45deg, #eef1f4 0 6px, #dfe5ea 6px 12px); z-index: 0; }
.st-cap { position: absolute; left: 0; right: 0; height: 0; border-top: 2px dashed var(--ink); z-index: 2; }
.st-cap span { position: absolute; right: 0; bottom: 2px; font-size: 0.66em; font-weight: 700; background: var(--panel); padding: 0 4px; border-radius: 3px; }
.st-now { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--accent); z-index: 3; }
.st-axis { position: absolute; left: 0; right: 0; bottom: 0; height: 16px; }
.st-axis span { position: absolute; transform: translateX(-50%); font-size: 0.7em; color: var(--muted); font-family: var(--mono); white-space: nowrap; }
.st-axis span:first-child { transform: none; }
.st-axis span:last-child { transform: translateX(-100%); }

/* Idempotency */
.id-cli { font-size: 0.88em; }
.id-db { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.id-tbl { border: 1.5px solid var(--line); border-radius: 8px; padding: 6px 8px; display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.id-tbl.off { opacity: 0.4; }
.id-rows { display: flex; flex-wrap: wrap; gap: 4px; min-height: 1.9em; align-content: flex-start; }
.id-row { font-size: 0.74em; font-family: var(--mono); padding: 3px 6px; border-radius: 4px; background: var(--ok-soft); white-space: nowrap; }
.id-row.dup { background: var(--block); color: #fff; }
.id-row.key { background: var(--accent-soft); }
.id-row code { background: none; padding: 0; font-size: 1em; }
@media (max-width: 420px) { .id-db { grid-template-columns: 1fr; } }

/* Circuit breaker */
.cb-sm { display: flex; align-items: center; gap: 6px; }
.cb-st { flex: 1; border: 2px solid var(--line); border-radius: 10px; padding: 6px 8px; display: flex; flex-direction: column; align-items: center; text-align: center; opacity: 0.55; transition: all 0.2s; min-width: 0; }
.cb-st b { font-family: var(--mono); font-size: 0.82em; }
.cb-st small { font-size: 0.7em; color: var(--muted); }
.cb-st.on { opacity: 1; }
.cb-st.closed.on { border-color: var(--ok); background: var(--ok-soft); }
.cb-st.open.on { border-color: var(--block); background: var(--block-soft); }
.cb-st.half.on { border-color: var(--amber); background: var(--amber-soft); }
.cb-arr { color: var(--muted); }
.cb-timer { font-size: 0.8em; color: var(--muted); font-family: var(--mono); min-height: 1.3em; margin-top: -6px; }
.cb-win { display: flex; align-items: center; gap: 10px; }
.cb-track { position: relative; overflow: visible; height: 10px; }
.cb-track .fill { background: var(--ok); border-radius: 5px; transition: width 0.2s; }
.cb-track.hot .fill { background: var(--block); }
.cb-th { position: absolute; left: 50%; top: -4px; bottom: -4px; width: 2px; background: var(--ink); }
.cb-rate { font-family: var(--mono); font-size: 0.78em; min-width: 7em; }
.cb-strip { display: grid; grid-template-columns: repeat(40, minmax(0, 1fr)); gap: 2px; margin-top: 4px; }
.cb-strip i { height: 16px; border-radius: 2px; background: var(--line); }
.cb-strip i.ok { background: var(--ok); }
.cb-strip i.fail { background: var(--block); }
.cb-strip i.fast { background: var(--panel); border: 1.5px dashed var(--muted); }
.cb-strip i.wait { background: var(--line); }
.cb-strip i.probe { border: 2px solid var(--amber); }
.cb-strip i.probe.ok { background: var(--ok); }
.cb-strip i.probe.fail { background: var(--block); }
@media (max-width: 480px) { .cb-strip { grid-template-columns: repeat(20, minmax(0, 1fr)); } .cb-strip i { height: 12px; } }

/* Bulkheads */
.bh-grid { display: grid; grid-template-columns: repeat(20, minmax(0, 1fr)); gap: 3px; margin-top: 4px; }
.bh-grid i { height: 26px; border-radius: 4px; background: var(--panel); border: 1px solid var(--line); }
.bh-grid i.b { background: var(--b); border-color: var(--b); }
.bh-grid i.c { background: var(--c); border-color: var(--c); }
.bh-grid i.split { margin-left: 8px; box-shadow: -6px 0 0 -4px var(--ink); }
.bh-rows { display: grid; gap: 6px; }
.bh-row { display: grid; grid-template-columns: 1.2em minmax(60px, 1fr) auto; gap: 10px; align-items: center; font-size: 0.82em; }
.bh-row b { font-family: var(--mono); }
.bh-row .track { height: 10px; }
.bh-row .fill { background: var(--ok); }
.bh-row.bad .fill { background: var(--block); }
.bh-row > span:last-child { font-variant-numeric: tabular-nums; }
@media (max-width: 480px) {
  .bh-grid { grid-template-columns: repeat(10, minmax(0, 1fr)); }
  .bh-grid i.split { margin-left: 0; box-shadow: none; }
  .bh-row { grid-template-columns: 1.2em 1fr; }
  .bh-row > span:last-child { grid-column: 2; font-size: 0.92em; color: var(--muted); }
}

/* Delivery */
.dl-steps { display: grid; gap: 3px; font-size: 0.78em; }
.dl-step { font-family: var(--mono); padding: 5px 8px; border-radius: 6px; background: var(--paper); border: 1px solid var(--line); overflow-wrap: anywhere; }
.dl-crash { color: var(--block); font-weight: 700; font-size: 0.9em; border-top: 2px dashed var(--block); margin: 2px 4px 0; }
.dl-q { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.dl-m { position: relative; font-family: var(--mono); font-weight: 700; font-size: 0.82em; padding: 6px 10px; border-radius: 6px; border: 1.5px solid var(--ink); background: var(--panel); }
.dl-m.acked { background: var(--ok-soft); border-color: var(--ok); color: var(--muted); }
.dl-m.again { background: var(--amber-soft); border-color: var(--amber); }
.dl-m sup { position: absolute; top: -8px; right: -6px; font-size: 0.75em; background: var(--block); color: #fff; border-radius: 8px; padding: 1px 4px; }
.dl-db { display: flex; flex-wrap: wrap; gap: 6px 18px; align-items: baseline; padding: 8px 10px; border-radius: 8px; background: var(--paper); font-size: 0.9em; }
.dl-db b { font-size: 1.2em; font-variant-numeric: tabular-nums; }

/* Partitions (static) */
.parts { display: flex; flex-direction: column; gap: 10px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--r-m); padding: clamp(14px, 2vw, 22px); }
.pt-prod { display: flex; flex-direction: column; gap: 6px; padding-bottom: 10px; border-bottom: 1px dashed var(--line); }
.pt-evs, .pt-log { display: flex; gap: 4px; flex-wrap: wrap; }
.parts i { font-style: normal; font-family: var(--mono); font-weight: 700; font-size: 0.78em; padding: 4px 8px; border-radius: 5px; color: #fff; }
.parts i.k1 { background: var(--accent); }
.parts i.k2 { background: var(--b); }
.parts i.k3 { background: var(--ok); }
.pt-row { display: grid; grid-template-columns: 2.2em 1fr auto; gap: 10px; align-items: center; }
.pt-row b { font-family: var(--mono); }
.pt-row .pt-log { border: 1.5px solid var(--ink); border-radius: 6px; padding: 4px; min-height: 34px; }
.pt-row > span { font-size: 0.8em; color: var(--muted); }
@media (max-width: 480px) { .pt-row { grid-template-columns: 2.2em 1fr; } .pt-row > span { grid-column: 2; margin-top: -6px; } }

/* Outbox */
.ob-steps { display: grid; gap: 4px; }
.ob-step { font: inherit; display: flex; gap: 8px; align-items: center; text-align: left; padding: 6px 10px; border-radius: 8px; border: 1.5px solid var(--line); background: var(--panel); cursor: pointer; color: var(--ink); }
.ob-step:hover { border-color: var(--ink); }
.ob-step .n { font-family: var(--mono); font-size: 0.75em; font-weight: 700; width: 1.6em; height: 1.6em; display: grid; place-items: center; border-radius: 50%; background: var(--paper); flex: none; }
.ob-step code { background: none; padding: 0; font-size: 0.76em; overflow-wrap: anywhere; }
.ob-step.relay { margin-left: 14px; border-style: dashed; }
.ob-step.cur { border-color: var(--accent); background: var(--accent-soft); }
.ob-step.cur .n { background: var(--accent); color: #fff; }
.ob-boom { font-size: 0.75em; font-weight: 700; color: var(--block); border-top: 2px dashed var(--block); padding-top: 1px; margin: 0 4px; }
.ob-stores { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.ob-store { border: 1.5px solid var(--ink); border-radius: 10px; padding: 6px 10px 8px; display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.ob-store.kafka { border-color: var(--line); background: var(--paper); }
.ob-rows { display: flex; flex-wrap: wrap; gap: 4px; min-height: 1.8em; }
.ob-row { font-family: var(--mono); font-size: 0.72em; padding: 3px 6px; border-radius: 4px; background: var(--ok-soft); }
.ob-row.tx { background: var(--amber-soft); border: 1px dashed var(--amber); }
.ob-row.sent { background: var(--line); color: var(--muted); }
.ob-row.ev { background: var(--ink); color: #fff; }
@media (max-width: 420px) { .ob-stores { grid-template-columns: 1fr; } }

/* Saga */
.sg-svcs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 6px; }
.sg-svc { border: 1.5px solid var(--line); border-radius: 8px; padding: 6px 8px; display: flex; flex-direction: column; gap: 2px; min-height: 64px; transition: background 0.2s; }
.sg-svc b { font-size: 0.85em; }
.sg-svc span { font-size: 0.76em; color: var(--muted); }
.sg-svc.done, .sg-svc.final { border-color: var(--ok); background: var(--ok-soft); }
.sg-svc.fail { border-color: var(--block); background: var(--block-soft); }
.sg-svc.undo { border-color: var(--amber); background: var(--amber-soft); }
.sg-svc.done span, .sg-svc.fail span, .sg-svc.undo span, .sg-svc.final span { color: var(--ink); }
.sg-msgs { margin: 0; padding-left: 1.6em; font-size: 0.8em; display: grid; gap: 2px; min-height: 9em; }
.sg-msgs li::marker { color: var(--muted); font-family: var(--mono); }
.sg-msgs code { font-size: 0.9em; }
@media (max-width: 520px) { .sg-svcs { grid-template-columns: 1fr 1fr; } }

/* Clocks */
.ck-svg svg { width: 100%; display: block; }
.ck-lane { stroke: var(--line); stroke-width: 2; }
.ck-node { font: 700 15px var(--mono); fill: var(--ink); }
.ck-axis { font: 400 10px var(--font); fill: var(--muted); }
.ck-msg { stroke: var(--muted); stroke-width: 1.5; }
.ck-msg.off { stroke-dasharray: 3 4; opacity: 0.35; }
.ck-arrhead { fill: var(--muted); }
.ck-w { fill: var(--ink); }
.ck-w.lost { fill: var(--block); }
.ck-r { fill: var(--panel); stroke: var(--ink); stroke-width: 2; }
.ck-lbl { font: 700 10px var(--mono); fill: var(--ink); }
.ck-lbl.sm { font-weight: 400; fill: var(--muted); }
.ck-res { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.ck-cell { border: 1.5px solid var(--line); border-radius: 8px; padding: 4px 10px; display: flex; gap: 8px; align-items: baseline; }
.ck-cell b { font-family: var(--mono); }
.ck-cell.good { border-color: var(--ok); background: var(--ok-soft); }
.ck-cell.bad { border-color: var(--block); background: var(--block-soft); }

/* Raft */
.rf-top { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 10px; align-items: center; }
.rf-svg { width: 100%; display: block; touch-action: manipulation; }
.rf-edge { stroke: var(--line); stroke-width: 1.5; }
.rf-m { fill: var(--muted); }
.rf-m.ae { fill: var(--accent); }
.rf-m.rv, .rf-m.rvr { fill: var(--amber); }
.rf-m.aer { fill: #9aa9b6; }
.rf-ring-bg { fill: none; stroke: var(--line); stroke-width: 3; }
.rf-ring { fill: none; stroke: var(--amber); stroke-width: 3; }
.rf-body { fill: var(--panel); stroke: var(--ink); stroke-width: 2; }
.rf-n.leader .rf-body { fill: var(--accent); stroke: var(--accent-deep); }
.rf-n.leader text { fill: #fff; }
.rf-n.candidate .rf-body { fill: var(--amber-soft); stroke: var(--amber); }
.rf-n.down .rf-body { fill: var(--paper); stroke: var(--muted); stroke-dasharray: 4 3; }
.rf-n.down text { fill: var(--muted); }
.rf-id { font: 700 12px var(--mono); text-anchor: middle; fill: var(--ink); }
.rf-t { font: 400 8.5px var(--font); text-anchor: middle; fill: var(--muted); }
.rf-info { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
.rf-info div { border: 1px solid var(--line); border-radius: 8px; padding: 4px 8px; display: flex; flex-direction: column; }
.rf-info div.bad { border-color: var(--block); background: var(--block-soft); }
.rf-info b { font-family: var(--mono); }
.rf-hint { grid-column: 1 / -1; font-size: 0.74em; color: var(--muted); margin: 0; }
.rf-logs { display: grid; gap: 3px; }
.rf-row { display: flex; gap: 3px; align-items: center; min-height: 26px; }
.rf-row > b { font-family: var(--mono); font-size: 0.78em; width: 2.2em; flex: none; }
.rf-row.down { opacity: 0.45; }
.rf-e { font-family: var(--mono); font-size: 0.68em; font-weight: 700; padding: 2px 5px; border-radius: 4px; border: 1.5px dashed var(--tc); color: var(--tc); white-space: nowrap; }
.rf-e.c { background: var(--tc); border-style: solid; color: #fff; }
.rf-e sub { font-size: 0.75em; margin-left: 1px; }
@media (max-width: 480px) { .rf-top { grid-template-columns: 1fr; } .rf-svg { max-width: 300px; margin: 0 auto; } .rf-info { grid-template-columns: repeat(4, 1fr); } }

/* Fencing */
.fn-tl { display: grid; gap: 6px; }
.fn-row { display: grid; grid-template-columns: 7.5em minmax(0, 1fr); gap: 8px; align-items: center; }
.fn-row > b { font-size: 0.78em; }
.fn-track { position: relative; height: 34px; background: var(--paper); border-radius: 6px; }
.fn-row.axis .fn-track { height: 16px; background: none; }
.fn-row.axis span { position: absolute; transform: translateX(-50%); font-size: 0.68em; color: var(--muted); font-family: var(--mono); white-space: nowrap; }
.fn-row.axis span:first-child { transform: none; }
.fn-seg { position: absolute; top: 5px; bottom: 5px; border-radius: 4px; font-size: 0.66em; font-weight: 600; display: flex; align-items: center; padding: 0 6px; white-space: nowrap; overflow: hidden; }
.fn-seg.l1 { background: var(--b); color: #fff; }
.fn-seg.l2 { background: var(--c); color: #fff; }
.fn-seg.gc { background: repeating-linear-gradient(-45deg, var(--amber-soft) 0 6px, #ffd8a8 6px 12px); color: #8a3a00; border: 1px solid var(--amber); }
.fn-mark { position: absolute; top: 0; bottom: 0; }
.fn-mark i { position: absolute; top: 4px; bottom: 4px; width: 4px; margin-left: 0; border-radius: 2px; background: var(--ink); }
.fn-mark em { position: absolute; top: 50%; transform: translateY(-50%); left: 6px; font-style: normal; font-size: 0.64em; font-weight: 700; white-space: nowrap; background: var(--panel); padding: 1px 4px; border-radius: 3px; }
.fn-mark.w i { background: var(--ok); }
.fn-mark.w.bad i, .fn-mark.w.no i { background: var(--block); }
.fn-mark.w.bad em { color: var(--block); }
.fn-mark.w.no em { color: var(--block); text-decoration: line-through; }
.fn-store { display: grid; grid-template-columns: 1.6fr 1fr; gap: 8px; }
.fn-store div { border: 1.5px solid var(--line); border-radius: 8px; padding: 6px 10px; display: flex; flex-direction: column; }
.fn-store div.bad { border-color: var(--block); background: var(--block-soft); }
@media (max-width: 480px) { .fn-row { grid-template-columns: 1fr; gap: 2px; } }
.ck-lbl { paint-order: stroke; stroke: var(--panel); stroke-width: 4px; stroke-linejoin: round; }
.deck pre.code { tab-size: 4; }