/* Animations for /blog/prompt-loop-graph-engineering, driven by /assets/anim/prompt-loop-graph-engineering.js.
   Builds on blog-anim.css (ink cards, .tok, .toks, .ch, .bb, .ch-tool, .pr, .lab). Every class is prefixed "pe-". */
.ax { --pe-red: #C8432F; }

/* shared */
.pe-wb { border: 2.5px solid var(--ink); border-radius: 14px; background: var(--card); padding: 10px 12px; min-width: 0; transition: box-shadow .3s; }
.pe-wb.read { box-shadow: 0 0 0 4px var(--agent); }
.pe-mark { display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 6px; font: 800 12.5px/1.4 var(--body); white-space: nowrap; }
.pe-mark.ok { background: var(--agent); border: 2px solid var(--ink); }
.pe-mark.bad { color: var(--pe-red); border: 2px dashed var(--pe-red); background: var(--card); }
.pe-tag { display: inline-block; margin-left: 4px; padding: 1px 7px; border: 2px dashed var(--grey); border-radius: 6px; font: 700 11.5px/1.4 var(--body); letter-spacing: .04em; color: var(--grey); white-space: nowrap; transition: opacity .3s, transform .3s; }
.pe-tag.pre { opacity: 0; transform: translateY(4px); }

/* 1 · the reel */
.pe-reel { max-width: 340px; margin: 0 auto; padding: 14px 16px 16px; border: 3px solid var(--ink); border-radius: 26px; background: var(--ink); color: var(--paper); box-shadow: 6px 6px 0 var(--agent); }
.pe-reel-bar { height: 4px; border-radius: 4px; background: rgba(255, 255, 255, .25); overflow: hidden; margin-bottom: 14px; }
.pe-reel-bar i { display: block; height: 100%; width: 0; background: var(--paper); transition: width 9s linear; }
.pe-reel-bar.go i { width: 100%; }
.pe-reel-t { min-height: 30px; font: 700 clamp(22px, 6vw, 27px)/1.15 var(--display); letter-spacing: -.01em; color: var(--res); overflow-wrap: anywhere; }
.pe-reel-s { min-height: 22px; margin-top: 4px; font: 700 15px/1.35 var(--body); transition: opacity .3s, transform .3s; }
.pe-reel-s.pre, .pe-reel-buy.pre, .pe-think.pre { opacity: 0; transform: translateY(6px); }
.pe-reel-chips { display: flex; flex-wrap: wrap; gap: 7px 6px; min-height: 104px; margin: 14px 0; align-content: flex-start; }
.pe-chip { max-width: 100%; padding: 3px 10px; border: 2px solid var(--paper); border-radius: 999px; font: 700 13.5px/1.35 var(--body); color: var(--ink); overflow-wrap: anywhere; transition: opacity .25s, transform .35s cubic-bezier(.2, .9, .3, 1.5); }
.pe-chip.c0 { background: var(--agent); transform: rotate(-2deg); } .pe-chip.c1 { background: var(--res); transform: rotate(1.5deg); } .pe-chip.c2 { background: var(--paper); transform: rotate(-1deg); }
.pe-chip.pre { opacity: 0; transform: scale(.6) rotate(-8deg); }
.pe-reel-buy { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; min-height: 48px; padding: 8px 10px; border-radius: 12px; background: rgba(255, 255, 255, .12); transition: opacity .3s, transform .3s; }
.pe-reel-buy b { display: block; font: 800 15px var(--body); }
.pe-reel-buy small { display: block; font: 700 12.5px var(--body); color: var(--res); }
.pe-reel-buy:empty { visibility: hidden; }
.pe-btn { padding: 5px 12px; border-radius: 9px; background: var(--res); color: var(--ink); font: 800 13.5px var(--body); animation: pe-pulse 1s ease-in-out infinite; }
@keyframes pe-pulse { 50% { transform: scale(1.07); } }
.pe-think { max-width: 340px; margin: 14px auto 0; padding: 8px 12px; border: 2.5px solid var(--ink); border-radius: 14px 14px 14px 4px; background: var(--card); font: 600 14.5px/1.4 var(--body); transition: opacity .3s, transform .3s; }
.pe-think:empty { display: none; }

/* 2 · think step by step */
.pe-q { font: 600 15px/1.45 var(--body); transition: opacity .3s, transform .3s; }
.pe-q.pre, .pe-magic.pre, .pe-ln.pre { opacity: 0; transform: translateY(6px); }
.pe-magic { display: none; margin-top: 8px; padding: 3px 10px; border: 2px solid var(--ink); border-radius: 8px; background: var(--agent); box-shadow: 3px 3px 0 var(--ink); font: 700 14px/1.4 var(--mono); width: fit-content; max-width: 100%; overflow-wrap: anywhere; transition: opacity .3s, transform .3s; }
.pe-magic.in { display: block; }
.pe-work { display: grid; gap: 5px; margin-top: 10px; min-height: 96px; align-content: start; }
.pe-ln { padding: 3px 9px; border-radius: 6px; background: #F1F0EA; font: 600 14px/1.4 var(--body); overflow-wrap: anywhere; transition: opacity .3s, transform .3s; }
.pe-ln.ans { background: var(--paper); border: 2px solid var(--ink); font-weight: 800; }
.pe-ln.ans.good { background: rgba(88, 186, 235, .22); }
.pe-score { margin-top: 12px; }
.pe-score .pr-r { grid-template-columns: 56px minmax(0, 1fr) 40px; }

/* 3 · tricks that expire */
.pe-tricks { display: grid; gap: 7px; }
.pe-tr { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 4px 10px; padding: 6px 10px; border: 2px solid var(--ink); border-radius: 10px; background: var(--card); transition: opacity .3s, transform .3s, background-color .3s; }
.pe-tr.pre { opacity: 0; transform: translateY(6px); }
.pe-tq { min-width: 0; font: 600 13.5px/1.4 var(--mono); overflow-wrap: anywhere; transition: color .3s; }
.pe-tr.gone .pe-tq { color: var(--grey); text-decoration: line-through; text-decoration-thickness: 2px; }
.pe-stamp { flex: none; padding: 1px 7px; border: 2.5px solid var(--pe-red); border-radius: 6px; color: var(--pe-red); font: 800 11.5px/1.4 var(--body); letter-spacing: .07em; text-transform: uppercase; white-space: nowrap; transform: rotate(-4deg); transition: opacity .2s, transform .3s cubic-bezier(.2, .9, .3, 1.3); }
.pe-stamp.pre { opacity: 0; transform: scale(1.15) rotate(-9deg); }
.pe-tr.keep { margin-top: 6px; border-width: 2.5px; background: rgba(88, 186, 235, .16); box-shadow: 4px 4px 0 var(--ink); }
.pe-tr.keep .pe-tq { font: 700 14px/1.4 var(--body); color: var(--ink); }
.pe-tr.keep .pe-stamp { border-color: var(--ink); background: var(--agent); color: var(--ink); }

/* 4 · what goes on the whiteboard */
.pe-bd { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; align-items: start; }
.pe-pile { display: grid; gap: 6px; }
.pe-card { position: relative; padding: 5px 30px 5px 10px; border: 2px solid var(--ink); border-radius: 9px; background: var(--card); font: 600 13.5px/1.35 var(--body); overflow-wrap: anywhere; transition: opacity .3s, transform .3s, background-color .3s; }
.pe-card.pre { opacity: 0; transform: translateY(6px) rotate(-1deg); }
.pe-card.kept { background: rgba(88, 186, 235, .22); }
.pe-card.dropped { opacity: .45; text-decoration: line-through; border-style: dashed; }
.pe-tick { position: absolute; right: 7px; top: 50%; translate: 0 -50%; font: 800 15px var(--body); transition: opacity .25s, transform .3s; }
.pe-card.dropped .pe-tick { color: var(--pe-red); }
.pe-tick.pre { opacity: 0; transform: scale(1.8); }
.pe-bd-lines { display: grid; gap: 4px; min-height: 100px; align-content: start; }
.pe-bd-lines > div { padding: 3px 8px; border-radius: 6px; background: var(--toolT); font: 600 13px/1.35 var(--body); overflow-wrap: anywhere; transition: opacity .3s, transform .3s; }
.pe-bd-lines > .pre { opacity: 0; transform: translateX(-10px); }
.pe-bd-out { margin-top: 12px; min-height: 66px; }
.pe-bd-out .tok { font-size: 14px; padding: 2px 7px; }
@media (max-width: 640px) { .pe-bd { grid-template-columns: minmax(0, 1fr); } .pe-bd-lines { min-height: 0; } }

/* 5 · look it up first (RAG) */
.pe-rag { min-height: 250px; }
.pe-guess { border-style: dashed; color: var(--grey); transition: opacity .5s, transform .3s; }
.pe-guess.struck { opacity: .35; text-decoration: line-through; }
.pe-notice { justify-self: start; max-width: 92%; display: grid; gap: 2px; padding: 8px 12px; border: 2.5px solid var(--ink); border-radius: 4px 12px 12px 12px; background: #FFF8D6; box-shadow: 4px 4px 0 var(--ink); font: 500 13.5px/1.45 var(--body); overflow-wrap: anywhere; transition: opacity .3s, transform .35s cubic-bezier(.2, .9, .3, 1.4), box-shadow .3s; }
.pe-notice.pre { opacity: 0; transform: translateY(-10px) rotate(-2deg); }
.pe-notice .lab { margin-bottom: 2px; }
.pe-notice b { font: 800 13.5px var(--body); }
.pe-notice mark { background: transparent; color: inherit; transition: background-color .4s; border-radius: 3px; }
.pe-notice.read { box-shadow: 4px 4px 0 var(--agent); }
.pe-notice.read mark { background: var(--agent); }
.pe-src { display: block; margin-top: 4px; font: 700 12px var(--body); color: var(--grey); }

/* 6 · the loop */
.pe-cyc { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 10px; }
.pe-node { padding: 3px 12px; border: 2.5px solid var(--ink); border-radius: 999px; background: var(--card); font: 800 14px/1.3 var(--body); transition: background-color .25s, box-shadow .25s, transform .25s; }
.pe-node.on { background: var(--agent); box-shadow: 3px 3px 0 var(--ink); transform: translateY(-2px); }
.pe-arr { font: 800 16px var(--body); color: var(--grey); }
.pe-arr.back { font-size: 19px; }
.pe-done { margin-left: auto; padding: 3px 10px; border: 2.5px solid var(--ink); border-radius: 8px; background: var(--res); font: 800 13.5px/1.3 var(--body); transition: opacity .3s, transform .35s cubic-bezier(.2, .9, .3, 1.5); }
.pe-done.pre { opacity: 0; transform: scale(.6); }
.pe-req { margin-bottom: 8px; padding: 3px 8px; border: 2px solid var(--ink); border-radius: 6px; background: var(--paper); font: 600 13.5px/1.35 var(--body); overflow-wrap: anywhere; }
.pe-ans { display: flex; flex-wrap: wrap; gap: 6px; min-height: 64px; align-content: flex-start; }
.pe-a { display: inline-flex; align-items: center; gap: 6px; max-width: 100%; padding: 2px 9px 2px 3px; border: 2px solid var(--ink); border-radius: 8px; background: var(--card); font: 600 13.5px/1.35 var(--body); overflow-wrap: anywhere; transition: opacity .3s, transform .3s, background-color .3s, border-color .3s; }
.pe-a i { flex: none; padding: 0 5px; border-radius: 5px; background: #F1F0EA; font: 800 11px/1.6 var(--body); font-style: normal; color: var(--grey); }
.pe-a.pre { opacity: 0; transform: translateY(6px) scale(.92); }
.pe-a.bad { border-color: var(--pe-red); border-style: dashed; color: var(--pe-red); }
.pe-a.fixed { background: var(--agent); }
.pe-chk { margin-top: 10px; min-height: 34px; }
.pe-chk .tok { font-size: 13px; padding: 2px 7px; }

/* 7 · the route map */
.pe-gq, .pe-gres { min-height: 26px; font: 600 14.5px/1.45 var(--body); overflow-wrap: anywhere; transition: opacity .3s, transform .3s; }
.pe-gq.pre, .pe-gres.pre { opacity: 0; transform: translateY(5px); }
.pe-gres { margin-top: 10px; }
.pe-map { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 0; margin: 10px 0 4px; }
.pe-st { position: relative; padding: 4px 10px; border: 2.5px solid var(--ink); border-radius: 999px; background: var(--card); font: 700 13.5px/1.3 var(--body); overflow-wrap: anywhere; transition: background-color .25s, box-shadow .25s, transform .25s, opacity .3s; }
.pe-st.pre { opacity: 0; transform: scale(.85); }
.pe-st.on { background: var(--agent); box-shadow: 3px 3px 0 var(--ink); transform: translateY(-2px); }
.pe-map:not(.free) .pe-st + .pe-st { margin-left: 14px; }
.pe-map:not(.free) .pe-st + .pe-st::before { content: ""; position: absolute; right: 100%; top: 50%; width: 16px; height: 4px; margin: -2px 1px 0 0; background: var(--ink); border-radius: 2px; }
.pe-back { font: 700 12.5px/1.4 var(--body); color: var(--grey); }
.pe-grow { min-height: 0; margin-top: 8px; }
.pe-st.ghost { display: inline-block; border-style: dashed; border-color: var(--pe-red); color: var(--pe-red); background: var(--card); border-radius: 10px; }
.pe-map.free { gap: 16px 14px; margin-top: 18px; }
.pe-st.tool { font: 600 13px/1.3 var(--mono); padding-right: 11px; }
.pe-st.tool em { position: absolute; top: -9px; right: -7px; display: grid; place-items: center; width: 19px; height: 19px; border: 2px solid var(--ink); border-radius: 50%; background: var(--res); font: 800 11px var(--body); font-style: normal; transition: opacity .25s, transform .3s; }
.pe-st.tool em.pre { opacity: 0; transform: scale(.4); }

/* 8 · a vague note vs a brief */
.pe-br { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; align-items: start; }
.pe-col { display: grid; gap: 8px; min-width: 0; align-content: start; }
.pe-note { padding: 8px 12px; border: 2.5px solid var(--ink); border-radius: 12px; background: var(--card); transition: opacity .3s, transform .3s; }
.pe-note.pre, .pe-note p.pre, .pe-say.pre, .pe-check.pre { opacity: 0; transform: translateY(6px); }
.pe-note p { margin: 0 0 5px; font: 600 13.5px/1.45 var(--body); overflow-wrap: anywhere; transition: opacity .3s, transform .3s; }
.pe-note p:last-child { margin-bottom: 0; }
.pe-k { display: inline-block; margin-right: 6px; padding: 0 6px; border-radius: 5px; font: 800 10.5px/1.7 var(--body); letter-spacing: .08em; text-transform: uppercase; vertical-align: 1px; }
.pe-k.goal { background: var(--agent); } .pe-k.context { background: var(--res); } .pe-k.example { background: #E2F3E7; border: 1.5px solid var(--ink); }
.pe-say { padding: 8px 12px; border-radius: 12px 12px 12px 4px; background: var(--paper); border: 2px solid var(--rule); font: 500 13.5px/1.5 var(--body); overflow-wrap: anywhere; transition: opacity .3s, transform .3s; }
.pe-say span { transition: opacity .25s; }
.pe-say span.pre { opacity: 0; }
.pe-say span.hl { background: var(--agent); border-radius: 4px; padding: 0 2px; font-weight: 700; }
.pe-col > .pe-tag { justify-self: start; margin-left: 0; }
.pe-check { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; margin-top: 12px; padding: 7px 12px; border: 2.5px solid var(--ink); border-radius: 12px; background: var(--card); box-shadow: 4px 4px 0 var(--agent); font: 600 13.5px/1.4 var(--body); transition: opacity .3s, transform .3s; }
.pe-check span { padding: 1px 8px; border-radius: 6px; background: rgba(88, 186, 235, .22); white-space: nowrap; }
@media (max-width: 640px) { .pe-br { grid-template-columns: minmax(0, 1fr); } }

/* phones: reserve each scene's tallest frame up front (measured at 375px), so the text below doesn't move */
@media (max-width: 640px) {
  .ax[data-anim=pe-reel] .ax-stage { min-height: 425px; } .ax[data-anim=pe-steps] .ax-stage { min-height: 340px; }
  .ax[data-anim=pe-expire] .ax-stage { min-height: 470px; } .ax[data-anim=pe-board] .ax-stage { min-height: 520px; }
  .ax[data-anim=pe-rag] .ax-stage { min-height: 385px; } .ax[data-anim=pe-loop] .ax-stage { min-height: 370px; }
  .ax[data-anim=pe-graph] .ax-stage { min-height: 215px; } .ax[data-anim=pe-brief] .ax-stage { min-height: 590px; }
}