.deck {
  --accent: #336791;
  --accent-deep: #24496b;
  --accent-soft: #e0e9f2;
  --accent-ink: #fff;
  --mem: #336791;
  --disk: #5a6e80;
  --dirty: #fddd00;
  --live: #00a29c;
  --dead: #ce3262;
}

/* Title: an 8 KB heap page */
.title-slide { flex-direction: row; align-items: center; gap: clamp(28px, 6vw, 80px); }
.title-slide h1 { font-size: clamp(2.5rem, 5vw + 0.5rem, 5rem); max-width: 10ch; }
.title-slide .lead { font-size: clamp(1.05rem, 0.8vw + 0.8rem, 1.3rem); max-width: 42ch; }
.hero-page {
  flex: none;
  width: min(100%, 340px);
  aspect-ratio: 1 / 1.1;
  border: 2px solid var(--ink);
  border-radius: 10px;
  background: var(--panel);
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  position: relative;
  font-size: 0.72em;
  overflow: hidden;
}
.hp-head { background: var(--ink); color: #fff; padding: 8px 10px; font-family: var(--mono); }
.hp-ptrs { display: flex; gap: 4px; padding: 8px 10px; align-items: center; color: var(--muted); }
.hp-ptrs i { width: 14px; height: 14px; border-radius: 3px; background: var(--accent); }
.hp-ptrs span { margin-left: 6px; }
.hp-free { display: grid; place-items: center; color: var(--muted); background: repeating-linear-gradient(-45deg, transparent 0 8px, var(--paper) 8px 16px); }
.hp-tuples { display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 10px; align-items: center; justify-content: flex-end; color: var(--muted); }
.hp-tuples i { width: 52px; height: 22px; border-radius: 4px; background: var(--live); }
.hp-tuples i.dead { background: var(--dead); opacity: 0.55; }
.hp-tuples span { width: 100%; text-align: right; }
.hp-size { position: absolute; right: 10px; top: 8px; color: #fff; font-family: var(--mono); font-weight: 700; }
@media (max-width: 900px) {
  .title-slide { flex-direction: column-reverse; align-items: stretch; }
  .hero-page { width: 100%; aspect-ratio: auto; height: 220px; }
}

.btn.danger { border-color: var(--block); color: var(--block); }
.btn.danger:hover:not(:disabled) { background: var(--block-soft); }
.cost-n b { font-size: 2em; letter-spacing: -0.02em; margin-right: 4px; font-variant-numeric: tabular-nums; }
.cost-track { height: 14px; background: var(--paper); border: 1px solid var(--line); border-radius: 4px; overflow: hidden; display: block; }
.cost-fill { display: block; height: 100%; background: var(--accent); transition: width 0.15s; }
.sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 6px; }

/* Architecture */
.arch-group { border-radius: 10px; padding: 6px 10px; display: grid; gap: 4px; border: 1.5px solid var(--line); }
.arch-title { font-size: 0.75em; font-weight: 700; color: var(--muted); }
.arch-items { display: flex; flex-wrap: wrap; gap: 5px; }
.arch-item {
  font: inherit; font-family: var(--mono); font-size: 0.74em; font-weight: 700;
  padding: 6px 9px; min-height: 34px; border-radius: 6px; cursor: pointer;
  border: 1.5px solid var(--c); background: var(--panel); color: var(--ink);
}
.arch-item:hover { background: var(--paper); }
.arch-item.sel { background: var(--c); color: #fff; }
.proc { --c: #13293d; }
.shared { --c: var(--mem); background: var(--accent-soft); border-color: transparent; }
.local { --c: #00a29c; }
.os { --c: #7a5ea8; }
.disk { --c: var(--disk); background: #e9edf1; border-color: transparent; }
.arch-detail { border-left: 4px solid var(--c, var(--accent)); padding: 4px 0 4px 14px; min-height: 5.5em; }
.arch-detail b { font-family: var(--mono); }
.arch-detail p { margin-top: 4px; font-size: 0.92em; color: var(--muted); }

/* Memory calculator */
.mc-l { min-width: 8.5em; }
.mc-bar { position: relative; display: flex; height: 34px; border-radius: 6px; overflow: hidden; background: var(--paper); border: 1px solid var(--line); }
.mc-bar span { height: 100%; transition: width 0.2s; }
.sb { background: var(--mem); }
.cn { background: #7a95b0; }
.wm { background: var(--dirty); }
.os { background: #d9d0ea; }
.sw.os { background: #d9d0ea; }
.mc-ram { position: absolute; top: 0; bottom: 0; width: 3px; margin-left: -1.5px; background: var(--block); }
.mc-ram::after { content: "RAM"; position: absolute; top: 2px; left: 5px; font-size: 0.65em; font-weight: 700; color: var(--block); font-style: normal; }
.mc-legend { display: grid; gap: 4px; font-size: 0.82em; }
.mc-legend div { display: flex; align-items: center; }
.mc-legend b { margin-left: auto; font-variant-numeric: tabular-nums; padding-left: 10px; }

/* MVCC page */
.pg-page { border: 2px solid var(--ink); border-radius: 10px; overflow: hidden; }
.pg-head { background: var(--ink); color: #fff; font-family: var(--mono); font-size: 0.72em; padding: 5px 10px; }
.pg-slots { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 6px; }
.tup { position: relative; border-radius: 6px; padding: 6px 8px 6px 26px; font-size: 0.78em; display: flex; flex-direction: column; gap: 1px; min-height: 50px; border: 1.5px solid transparent; }
.tup .lp { position: absolute; left: 6px; top: 6px; font-family: var(--mono); font-size: 0.85em; color: var(--muted); }
.tup b { font-family: var(--mono); font-size: 0.95em; }
.tup .x { font-family: var(--mono); font-size: 0.85em; color: var(--muted); }
.tup .tag { font-size: 0.85em; font-weight: 600; }
.tup.live { background: var(--ok-soft); border-color: var(--live); }
.tup.live .tag { color: #007a75; }
.tup.dead { background: var(--block-soft); border-color: var(--dead); opacity: 0.8; }
.tup.dead b { text-decoration: line-through; }
.tup.dead .tag { color: var(--dead); }
.tup.held { background: #fdf4c4; border-color: #d9b800; }
.tup.held .tag { color: #7a6a00; }
.tup.free { border: 1.5px dashed var(--line); color: var(--muted); justify-content: center; }
.mv-views { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mv-views div { border-radius: 8px; padding: 8px 10px; background: var(--paper); display: flex; flex-direction: column; }
.mv-views div.snap { background: #fdf4c4; }
.mv-views b { font-family: var(--mono); }
@media (max-width: 420px) { .pg-slots { grid-template-columns: 1fr 1fr; } .tup { font-size: 0.7em; } }

/* Bloat */
.bl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(18px, 1fr)); gap: 3px; min-height: 60px; }
.bl-page { position: relative; height: 34px; border: 1px solid var(--line); border-radius: 3px; background: var(--panel); display: flex; flex-direction: column-reverse; overflow: hidden; }
.bl-page i { display: block; width: 100%; }
.bl-page i.live, .sw.live { background: var(--live); }
.bl-page i.dead, .sw.dead { background: var(--dead); }
.sw.free { background: var(--panel); border: 1px solid var(--line); }
.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; }

/* Wraparound */
.wr-bar { position: relative; display: flex; height: 24px; border-radius: 6px; overflow: visible; border: 1px solid var(--line); }
.wr-bar span { height: 100%; }
.wr-bar .z1 { background: var(--ok-soft); border-radius: 6px 0 0 6px; }
.wr-bar .z2 { background: #fdf4c4; }
.wr-bar .z3 { background: #f6b6c8; }
.wr-bar .z4 { flex: 1; background: var(--block); border-radius: 0 6px 6px 0; }
.wr-mark { position: absolute; top: -6px; bottom: -6px; width: 4px; margin-left: -2px; background: var(--ink); border-radius: 2px; }

/* Buffers */
.bf-grid { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 5px; }
.bf { position: relative; border: 1.5px solid var(--line); border-radius: 6px; padding: 12px 2px 5px; display: flex; flex-direction: column; align-items: center; gap: 4px; background: var(--panel); }
.bf b { font-family: var(--mono); font-size: 0.72em; }
.bf.scan { background: #ece6f6; }
.bf.last { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.bf .hand { position: absolute; top: -2px; font-size: 0.7em; color: var(--block); }
.usage { display: flex; gap: 2px; }
.usage i { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }
.usage i.off { background: var(--line); }
@media (max-width: 520px) { .bf-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }

/* WAL */
.wl-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.wl-col { border-radius: 10px; padding: 8px 10px; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.wl-col.mem { background: var(--accent-soft); }
.wl-col.disk { background: #e9edf1; }
.wl-h { font-weight: 700; display: flex; justify-content: space-between; gap: 6px; flex-wrap: wrap; }
.wl-h span { font-weight: 400; font-size: 0.75em; color: var(--muted); }
.wl-empty { color: var(--block); font-weight: 600; font-size: 0.88em; padding: 18px 0; text-align: center; }
.wl-pages { display: flex; gap: 5px; flex-wrap: wrap; }
.wpg { display: flex; flex-direction: column; align-items: center; min-width: 46px; padding: 4px 6px; border-radius: 6px; background: var(--panel); border: 1.5px solid var(--line); font-family: var(--mono); font-size: 0.75em; }
.wpg b { font-size: 1.3em; }
.wpg small { font-size: 0.75em; font-family: var(--font); }
.wpg.dirty { background: var(--dirty); border-color: var(--ink); }
.wl-recs { display: flex; flex-wrap: wrap; gap: 3px; min-height: 1.8em; }
.wr { font-family: var(--mono); font-size: 0.68em; padding: 2px 5px; border-radius: 3px; background: var(--panel); border: 1px solid var(--line); }
.wr small { color: var(--muted); }
.wr.cm { background: var(--live); color: #fff; border-color: var(--live); }
.wr.ck { background: var(--ink); color: #fff; border-color: var(--ink); }
@media (max-width: 420px) { .wl-cols { grid-template-columns: 1fr; } }

/* B+tree */
.num-in { font: inherit; width: 5em; padding: 6px 10px; border-radius: 8px; border: 1.5px solid var(--ink); background: var(--panel); color: var(--ink); min-height: 40px; }
.bt { display: flex; flex-direction: column; gap: 14px; overflow-x: auto; padding: 4px 0 8px; }
.bt-level { display: flex; justify-content: center; align-items: center; gap: 8px; min-width: max-content; margin: 0 auto; }
.bt-node { display: inline-flex; border: 1.5px solid var(--ink); border-radius: 6px; background: var(--panel); overflow: hidden; }
.bt-node span { min-width: 2.2em; padding: 4px 4px; text-align: center; font-family: var(--mono); font-size: 0.76em; border-right: 1px solid var(--line); }
.bt-node span:last-child { border-right: 0; }
.bt-node.leaf { border-color: var(--accent); }
.bt-node.path { background: var(--accent-soft); box-shadow: 0 0 0 2px var(--accent); }
.bt-node span.hit { background: var(--accent); color: #fff; font-weight: 700; }
.bt-link { color: var(--muted); font-size: 0.8em; margin: 0 -4px; }

/* Composite index */
.cq-list { display: grid; gap: 5px; }
.cq-btn { font: inherit; text-align: left; padding: 8px 10px; border-radius: 8px; border: 1.5px solid var(--line); background: var(--panel); cursor: pointer; }
.cq-btn code { background: none; padding: 0; font-size: 0.8em; overflow-wrap: anywhere; }
.cq-btn .k { color: var(--accent); font-weight: 700; }
.cq-btn .s { color: #00756e; }
.cq-btn .n { color: var(--block); }
.cq-btn.sel { border-color: var(--accent); background: var(--accent-soft); }
.cx-index { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 3px; }
.cx { display: flex; flex-direction: column; align-items: center; padding: 4px 2px; border-radius: 5px; background: var(--paper); font-family: var(--mono); font-size: 0.7em; color: var(--muted); border: 1.5px solid transparent; }
.cx b { color: var(--ink); }
.cx.read { background: #fdf4c4; border-color: #d9b800; }
.cx.match { background: var(--accent); color: #fff; border-color: var(--accent); }
.cx.match b { color: #fff; }

/* Index types */
.ixtypes { display: grid; border-top: 2px solid var(--ink); }
.ixt { display: grid; grid-template-columns: 9em 1fr; gap: 16px; padding: 9px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.ixt b { font-family: var(--mono); color: var(--accent); }
@media (max-width: 600px) { .ixt { grid-template-columns: 1fr; gap: 2px; } }

/* Planner */
.pl-bars { display: grid; gap: 8px; }
.pl-row { display: grid; grid-template-columns: 9.5em 1fr 5em; gap: 10px; align-items: center; font-size: 0.85em; }
.pl-row b { text-align: right; font-family: var(--mono); font-size: 0.9em; }
.pl-row .cost-fill { background: #9fb4c6; }
.pl-row.best { font-weight: 700; }
.pl-row.best .cost-fill { background: var(--accent); }

/* Pooler modes */
.modes { display: grid; grid-template-columns: 1fr 1.6fr 1fr; gap: 12px; }
.mode { border: 1.5px solid var(--line); border-radius: 10px; padding: 12px 14px; display: flex; flex-direction: column; gap: 6px; background: var(--panel); }
.mode.main { border-color: var(--accent); border-width: 2px; }
.mode h3 { font-family: var(--mono); }
.mode p, .mode ul { font-size: 0.92em; margin: 0; }
.mode ul { padding-left: 1.1em; display: grid; gap: 4px; }
@media (max-width: 800px) { .modes { grid-template-columns: 1fr; } }

/* Locks */
.lk-table { border: 2px solid var(--ink); border-radius: 10px; padding: 8px 10px; display: grid; gap: 5px; }
.lk-row { display: flex; flex-wrap: wrap; gap: 3px; min-height: 1.9em; align-items: center; }
.lk { font-family: var(--mono); font-size: 0.68em; font-weight: 700; padding: 3px 6px; border-radius: 4px; background: var(--accent-soft); color: var(--accent-deep); }
.lk.report { background: var(--accent); color: #fff; }
.lk.alter { background: var(--block); color: #fff; }

/* Pool */
.pl-clients, .pl-servers { display: flex; flex-wrap: wrap; gap: 3px; align-items: center; }
.pl-clients i, .pl-servers i { width: 9px; height: 9px; border-radius: 50%; background: var(--line); }
.pl-servers i { width: 12px; height: 12px; border-radius: 3px; background: #9fb4c6; }
.pl-clients i.busy, .pl-servers i.busy { background: var(--accent); }
.pl-clients i.rej { background: var(--block); }
.pl-clients .more { font-size: 0.72em; color: var(--muted); margin-left: 6px; }

/* Replication */
.rp { display: grid; gap: 6px; }
.rp-node { display: grid; grid-template-columns: 5em 7em 1fr; grid-template-rows: auto auto; gap: 2px 10px; align-items: center; border: 1.5px solid var(--line); border-radius: 8px; padding: 6px 10px; }
.rp-node .label { grid-column: 2 / -1; }
.rp-node.primary { border-color: var(--accent); }
.rp-node.down { opacity: 0.55; border-style: dashed; border-color: var(--block); }
.rp-lsn { font-family: var(--mono); font-size: 0.8em; }

/* Failover */
.fo { display: grid; gap: 8px; }
.fo-dcs { display: flex; flex-wrap: wrap; gap: 6px 14px; align-items: center; padding: 8px 10px; border-radius: 8px; background: var(--accent-soft); font-size: 0.88em; }
.fo-ttl { display: flex; align-items: center; gap: 8px; font-family: var(--mono); font-size: 0.85em; flex: 1; min-width: 160px; }
.fo-route { font-size: 0.88em; }
.fo-nodes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.fo-node { border: 1.5px solid var(--line); border-radius: 8px; padding: 8px; display: flex; flex-direction: column; gap: 2px; font-size: 0.88em; }
.fo-node b { font-family: var(--mono); }
.fo-node .role { font-weight: 700; }
.fo-node.primary { border-color: var(--accent); background: var(--accent-soft); }
.fo-node.promoting { border-color: #d9b800; background: #fdf4c4; }
.fo-node.demoted, .fo-node.down { border-style: dashed; border-color: var(--block); opacity: 0.7; }

/* PITR */
.pt-line { position: relative; height: 70px; margin: 8px 0 0; }
.pt-wal { position: absolute; left: 0; right: 0; top: 30px; height: 10px; border-radius: 5px; background: repeating-linear-gradient(90deg, #c7d4e0 0 6px, #b3c3d3 6px 12px); }
.pt-day { position: absolute; top: 48px; font-size: 0.7em; color: var(--muted); border-left: 1px solid var(--line); padding-left: 3px; height: 20px; }
.pt-bk { position: absolute; top: 24px; width: 6px; height: 22px; margin-left: -3px; border-radius: 2px; background: var(--ink); }
.pt-bk.used { background: var(--accent); box-shadow: 0 0 0 2px var(--accent-soft); }
.pt-replay { position: absolute; top: 30px; height: 10px; background: var(--accent); opacity: 0.6; border-radius: 5px; }
.pt-inc { position: absolute; top: 0; height: 46px; border-left: 3px solid var(--block); }
.pt-inc b { position: absolute; top: 0; right: 6px; white-space: nowrap; font-size: 0.68em; color: var(--block); font-family: var(--mono); }
.pt-target { position: absolute; top: 18px; width: 14px; height: 34px; margin-left: -7px; border-radius: 4px; border: 3px solid var(--ok); }

/* Symptoms */
.sy-list { display: grid; gap: 4px; }
@media (min-width: 901px) { .sy-list { grid-template-columns: 1fr 1fr; } }
.sy-btn { font: inherit; font-size: 0.78em; text-align: left; padding: 5px 9px; border-radius: 7px; border: 1.5px solid var(--line); background: var(--panel); cursor: pointer; color: var(--ink); }
.sy-btn:hover { background: var(--paper); }
.sy-btn.sel { border-color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.sy-detail { border-left: 4px solid var(--accent); padding: 2px 0 2px 14px; display: grid; gap: 4px; }
.sy-detail p { font-size: 0.86em; margin-bottom: 2px; }
.sy-detail pre.code { font-size: 12px; }