/* Under the hood: the illustrations (hood.js drives them). Light and dark follow the site tokens. */
:root { --rep-l: #d69e00; --rep-p: #2563eb; --ok: #16a34a; --flow: #b45309; --glow: rgba(245, 197, 24, .35) }
:root[data-theme="dark"] { --rep-l: #f5c518; --rep-p: #60a5fa; --ok: #4ade80; --flow: #f5c518; --glow: rgba(245, 197, 24, .25) }

.fig { margin: 26px 0; background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 20px; box-shadow: var(--shadow); position: relative; overflow: hidden }
.fig svg { display: block; width: 100%; height: auto }
.fig .figcap { font-size: 14px; color: var(--muted); margin: 12px 2px 0 }
.fig .controls { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 14px }
.fig button.ctl { font: 600 13px var(--sans); color: var(--ink); background: var(--paper-2); border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px; cursor: pointer }
.fig button.ctl:hover { border-color: var(--accent-deep) }
.fig [data-replay] { position: absolute; top: 12px; right: 12px }
.scroll-x { overflow-x: auto }
.scroll-x > svg { min-width: 680px }

/* SVG vocabulary */
.fig text { fill: var(--ink); font: 14px var(--sans) }
.fig text.s { fill: var(--muted); font-size: 12px }
.fig text.m { font-family: var(--mono); font-size: 12px }
.fig text.b { font-weight: 700 }
.fig .box { fill: var(--paper-2); stroke: var(--line); stroke-width: 1.5 }
.fig .box.hub { fill: color-mix(in srgb, var(--accent) 20%, var(--card)); stroke: var(--accent-deep) }
.fig .box.inner { fill: var(--card) }
.fig .group { fill: none; stroke: var(--line); stroke-dasharray: 5 5; stroke-width: 1.4 }
.fig .wire { fill: none; stroke: var(--muted); stroke-width: 1.6; opacity: .55 }
.fig .flow { fill: none; stroke: var(--flow); stroke-width: 2.2; stroke-dasharray: 3 9; stroke-linecap: round; opacity: .8 }
.fig .pkt { fill: var(--accent) ; stroke: var(--accent-deep); stroke-width: 1.5 }
.fig .pkt.p { fill: var(--rep-p); stroke: var(--rep-p) }
.fig .ring { fill: none; stroke: var(--accent-deep); stroke-width: 2 }
.fig svg.still .pkt, .fig svg.still .ring { display: none }
.play .flow { animation: flow 1.4s linear infinite }
@keyframes flow { to { stroke-dashoffset: -24 } }
.paused .flow, .paused * { animation-play-state: paused !important }

/* ------------------------------------------------ CRDT stepper */
#crdt-demo .lanes { display: grid; gap: 14px; margin-top: 6px }
#crdt-demo .lane { display: grid; grid-template-columns: 118px 1fr; gap: 14px; align-items: center; padding: 14px; border-radius: 14px; background: var(--paper-2); border: 1px solid var(--line) }
#crdt-demo .who { font: 600 14px var(--sans); display: flex; gap: 10px; align-items: center }
#crdt-demo .who svg { width: 28px; height: 28px; flex: none }
#crdt-demo .who small { display: block; font-weight: 400; color: var(--muted); font-size: 12px }
#crdt-demo .text { display: flex; flex-wrap: wrap; gap: 6px; min-height: 58px; align-items: center }
#crdt-demo .tile { display: inline-flex; flex-direction: column; align-items: center; padding: 6px 10px 4px; border-radius: 10px; background: var(--card); border: 1.5px solid var(--line); animation: pop .45s ease-out both }
#crdt-demo .tile b { font: 600 20px var(--mono); letter-spacing: .02em; white-space: pre }
#crdt-demo .tile i { font: 11px var(--mono); color: var(--muted); font-style: normal; margin-top: 2px }
#crdt-demo .tile.L { border-color: color-mix(in srgb, var(--rep-l) 55%, var(--line)) }
#crdt-demo .tile.P { border-color: color-mix(in srgb, var(--rep-p) 55%, var(--line)) }
#crdt-demo .tile.L b { color: color-mix(in srgb, var(--rep-l) 70%, var(--ink)) }
#crdt-demo .tile.P b { color: color-mix(in srgb, var(--rep-p) 75%, var(--ink)) }
#crdt-demo .tile.new { box-shadow: 0 0 0 4px var(--glow) }
#crdt-demo .tile.win { box-shadow: 0 0 0 4px color-mix(in srgb, var(--rep-p) 30%, transparent) }
#crdt-demo .tile.dead { opacity: .45; border-style: dashed }
#crdt-demo .tile.dead b { text-decoration: line-through; text-decoration-thickness: 2px }
#crdt-demo .tile.dead i::after { content: " · tombstone" }
@keyframes pop { from { transform: translateY(6px) scale(.92); opacity: 0 } }
#crdt-demo .ops { position: relative; height: 34px; margin: 2px 118px 0 132px }
#crdt-demo .op { position: absolute; top: 4px; font: 12px var(--mono); padding: 4px 10px; border-radius: 999px; white-space: nowrap; border: 1.5px solid; background: var(--card); opacity: 0; transition: transform 1.1s cubic-bezier(.6, 0, .3, 1), opacity .4s }
/* In the empty right half of the lanes: out of each lane, then into the other one. */
#crdt-demo .op.l { left: 38%; border-color: var(--rep-l); color: color-mix(in srgb, var(--rep-l) 70%, var(--ink)) }
#crdt-demo .op.p { left: 66%; border-color: var(--rep-p); color: color-mix(in srgb, var(--rep-p) 75%, var(--ink)) }
#crdt-demo[data-ops="out"] .op, #crdt-demo[data-ops="cross"] .op { opacity: 1 }
#crdt-demo[data-ops="cross"] .op.l { transform: translateY(58px) }
#crdt-demo[data-ops="cross"] .op.p { transform: translateY(-58px) }
#crdt-demo .done { display: none; color: var(--ok); font-weight: 700; margin: 8px 0 0 132px }
#crdt-demo[data-ops="done"] .done { display: block; animation: pop .5s both }
#crdt-demo .cap { min-height: 3.2em; margin: 14px 2px 0; font-size: 15.5px }
#crdt-demo .dots { display: flex; gap: 6px; margin-left: auto }
#crdt-demo .dots button { width: 10px; height: 10px; border-radius: 50%; border: 0; padding: 0; background: var(--line); cursor: pointer }
#crdt-demo .dots button.on { background: var(--accent-deep) }
@media (max-width: 640px) {
  #crdt-demo .lane { grid-template-columns: 1fr }
  #crdt-demo .ops { margin: 2px 0 0 }
  #crdt-demo .done { margin-left: 0 }
}

/* ------------------------------------------------ OT sequence (CSS timeline) */
#ot .msg { stroke-width: 2.4; fill: none; stroke-dasharray: 560; stroke-dashoffset: 560 }
#ot .msg.e { stroke: var(--rep-l) } #ot .msg.p { stroke: var(--rep-p) }
#ot .arrow.e { fill: var(--rep-l) } #ot .arrow.p { fill: var(--rep-p) }
#ot .lifeline { stroke: var(--line); stroke-width: 2; stroke-dasharray: 6 6 }
#ot .fade { opacity: 0 }
#ot.play .msg { animation: draw 1.3s ease-in-out forwards }
#ot.play .msg.p { animation-delay: .25s }
#ot.play .f1 { animation: fade .5s .5s forwards }
#ot.play .f2 { animation: fade .5s 1.6s forwards }
#ot.play .f3 { animation: fade .6s 2.9s forwards }
#ot.play .f4 { animation: fade .6s 4.1s forwards }
#ot .ah { opacity: 0 }
#ot.play .ah { animation: fade .25s 1.2s forwards }
#ot.still .msg { stroke-dashoffset: 0 } #ot.still .fade, #ot.still .ah { opacity: 1 }
@keyframes draw { to { stroke-dashoffset: 0 } }
@keyframes fade { to { opacity: 1 } }
#ot .tbox { fill: var(--paper-2); stroke: var(--line) }
#ot .okbox { fill: color-mix(in srgb, var(--ok) 14%, var(--card)); stroke: var(--ok) }

/* ------------------------------------------------ hub timeline (10 s loop) */
#hubfig .row { fill: var(--card); stroke: var(--line) }
#hubfig .row.new { fill: color-mix(in srgb, var(--accent) 30%, var(--card)); stroke: var(--accent-deep) }
#hubfig .pk { opacity: 0 }
#hubfig .t-row, #hubfig .t-fsync, #hubfig .t-bell, #hubfig .t-dup { opacity: 0 }
#hubfig.play .t-push   { animation: push 10s linear infinite }
#hubfig.play .t-reply  { animation: reply 10s linear infinite }
#hubfig.play .t-row    { animation: row 10s ease-out infinite }
#hubfig.play .t-fsync  { animation: fsync 10s linear infinite }
#hubfig.play .t-bell   { animation: bell 10s ease-out infinite; transform-box: fill-box; transform-origin: center }
#hubfig.play .t-pull   { animation: pull 10s linear infinite }
#hubfig.play .t-page   { animation: page 10s linear infinite }
#hubfig.play .t-resend { animation: resend 10s linear infinite }
#hubfig.play .t-dup    { animation: dup 10s linear infinite }
#hubfig.still .t-row, #hubfig.still .t-fsync, #hubfig.still .t-dup { opacity: 1 }
@keyframes push   { 0% { opacity: 0; transform: translateX(0) } 2% { opacity: 1 } 14% { opacity: 1; transform: translateX(250px) } 16%, 100% { opacity: 0; transform: translateX(250px) } }
@keyframes row    { 0%, 15% { opacity: 0; transform: translateY(-16px) } 20%, 100% { opacity: 1; transform: none } }
@keyframes fsync  { 0%, 19% { opacity: 0 } 22%, 34% { opacity: 1 } 38%, 100% { opacity: 0 } }
@keyframes reply  { 0%, 22% { opacity: 0; transform: translateX(250px) } 24% { opacity: 1 } 34% { opacity: 1; transform: translateX(0) } 36%, 100% { opacity: 0 } }
@keyframes bell   { 0%, 36% { opacity: 0; transform: scale(.4) } 40% { opacity: .9 } 52% { opacity: 0; transform: scale(3.6) } 100% { opacity: 0 } }
@keyframes pull   { 0%, 52% { opacity: 0; transform: translateX(0) } 54% { opacity: 1 } 64% { opacity: 1; transform: translateX(250px) } 66%, 100% { opacity: 0 } }
@keyframes page   { 0%, 65% { opacity: 0; transform: translateX(250px) } 67% { opacity: 1 } 77% { opacity: 1; transform: translateX(0) } 79%, 100% { opacity: 0 } }
@keyframes resend { 0%, 79% { opacity: 0; transform: translateX(0) } 81% { opacity: 1 } 89% { opacity: 1; transform: translateX(250px) } 91%, 100% { opacity: 0 } }
@keyframes dup    { 0%, 89% { opacity: 0 } 91%, 99% { opacity: 1 } 100% { opacity: 0 } }
#hubfig .lbl { font: 12px var(--mono); fill: var(--muted) }
/* Labels share their packet's timeline but stay in the middle: only the fade applies. */
#hubfig .fix { transform: none !important }

/* ------------------------------------------------ bounded slots */
#slots .top-line { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: baseline; margin-bottom: 14px; font-size: 15px }
#slots .top-line strong { font: 700 22px var(--mono) }
#slots .stage { display: grid; grid-template-columns: 150px 1fr; gap: 18px; align-items: center }
#slots .queue { position: relative; height: 150px; border-radius: 14px; border: 1.5px dashed var(--line); background: var(--paper-2);
  background-image: repeating-linear-gradient(to top, color-mix(in srgb, var(--rep-p) 55%, transparent) 0 9px, transparent 9px 12px);
  background-size: 100% calc(var(--wait, 0) * 12px); background-repeat: no-repeat; background-position: bottom; transition: background-size .25s }
#slots .queue::after { content: "waiting"; position: absolute; top: 8px; left: 0; right: 0; text-align: center; font: 12px var(--mono); color: var(--muted) }
#slots .grid-slots { display: grid; grid-template-columns: repeat(12, 1fr); gap: 8px }
#slots .grid-slots span { display: grid; grid-template-rows: 1fr 1fr; gap: 3px; aspect-ratio: 1 / 1.35; padding: 4px; border-radius: 9px; border: 1.5px solid var(--line); background: var(--card); transition: border-color .2s }
#slots .grid-slots i { border-radius: 4px; background: var(--paper-2); transition: background .2s }
#slots .grid-slots span.busy { border-color: var(--accent-deep) }
#slots .grid-slots span.busy i { background: var(--accent) }
#slots.full .grid-slots { outline: 2px solid color-mix(in srgb, var(--accent-deep) 50%, transparent); outline-offset: 6px; border-radius: 10px }
#slots .legend { display: flex; flex-wrap: wrap; gap: 14px; font-size: 13px; color: var(--muted); margin-top: 14px }
#slots .legend i { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 6px; background: var(--accent) }
#slots .legend i.q { background: var(--rep-p) }
@media (max-width: 640px) { #slots .stage { grid-template-columns: 1fr } #slots .queue { height: 60px } #slots .grid-slots { grid-template-columns: repeat(8, 1fr) } }

.bars { display: grid; gap: 12px; margin: 18px 0 6px }
.bars .bar { display: grid; grid-template-columns: 210px 1fr; gap: 14px; align-items: center; font-size: 14px }
.bars .track { height: 26px; border-radius: 8px; background: var(--paper-2); border: 1px solid var(--line); overflow: hidden }
.bars .fill { height: 100%; width: 0; border-radius: 7px; display: flex; align-items: center; padding: 0 10px; font: 600 12.5px var(--mono); color: #1f1d1a; white-space: nowrap; background: var(--accent); transition: width 1.6s cubic-bezier(.3, .8, .3, 1) }
.bars .fill.big { background: #ef4444; color: #fff }
.bars.play .fill { width: var(--w) }
@media (max-width: 640px) { .bars .bar { grid-template-columns: 1fr } }

/* ------------------------------------------------ one binary */
.anatomy { border: 2px solid var(--accent-deep); border-radius: 18px; padding: 18px; background: color-mix(in srgb, var(--accent) var(--tint), var(--card)) }
.anatomy .head { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font: 700 18px var(--mono); margin-bottom: 14px }
.anatomy .head span { font: 13px var(--sans); color: var(--muted); align-self: center }
.anatomy .groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px }
.anatomy .grp { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 12px }
.anatomy .grp h4 { margin: 0 0 8px; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted) }
.anatomy .chips { display: flex; flex-wrap: wrap; gap: 6px }
.anatomy .chips code { opacity: 0; transform: translateY(6px); transition: opacity .4s, transform .4s; transition-delay: calc(var(--i, 0) * 45ms) }
.anatomy.play .chips code { opacity: 1; transform: none }

/* ------------------------------------------------ convergence */
#converge { padding-top: 58px }
#converge .rep { display: grid; grid-template-columns: 94px repeat(18, 1fr); gap: 4px; align-items: center; margin: 6px 0 }
#converge .rep::before { content: attr(data-name); font: 13px var(--mono); color: var(--muted) }
#converge .rep span { aspect-ratio: 1; border-radius: 4px; background: var(--paper-2); transition: background .12s, transform .12s }
#converge .rep span.fly { transform: scale(.7) }
#converge .rep span.a { background: #f5c518 } #converge .rep span.b { background: #60a5fa } #converge .rep span.c { background: #34d399 }
#converge .rep span.d { background: #f472b6 } #converge .rep span.e { background: #a78bfa } #converge .rep span.x { background: var(--line) }
#converge .verdict { margin-top: 12px; font-weight: 700; color: var(--ok); opacity: 0; transition: opacity .4s }
#converge.same .verdict { opacity: 1 }
#converge.same .rep span { animation: settle .5s both }
@keyframes settle { 50% { transform: scale(1.12) } }

@media (prefers-reduced-motion: reduce) {
  .fig *, .fig *::before, .fig *::after { animation: none !important; transition: none !important }
}