/* AI för alla · fikaföreläsning
   Palette and line language taken from the AI Basics animations, so the talk and the videos feel like one thing. */
:root {
  --night: #0B1020;      /* scene background */
  --void: #05070E;       /* the page between scenes */
  --ink: #141D38;        /* panels */
  --ink2: #1B2647;
  --line: #5AB4FF;       /* line art, bars, the model */
  --ember: #FF8C00;      /* the predicted word: whatever the model is about to write */
  --mint: #6BE3A0;       /* right */
  --alarm: #FF5C5C;      /* wrong */
  --paper: #E8E4D8;      /* sticky notes, QR */
  --text: #F2F4F8;
  --dim: #7C879C;
  --faint: rgba(90, 180, 255, .16);
  --mono: "JetBrains Mono", ui-monospace, monospace;
  --sans: "Montserrat", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--void); color: var(--text); font-family: var(--sans); overflow: hidden; -webkit-font-smoothing: antialiased; }
body { font-variant-numeric: tabular-nums; }
button { font-family: inherit; }

/* ------------------------------------------------------------ stage / world */
#ambient, #laser { position: fixed; inset: 0; pointer-events: none; }
#laser { z-index: 50; }
body.laser { cursor: none; }
#stage { position: absolute; left: 0; top: 0; width: 1920px; height: 1080px; transform-origin: 0 0; overflow: hidden; }
#world { position: absolute; left: 0; top: 0; width: 0; height: 0; transform-origin: 0 0; }
#world.promo { will-change: transform; }
body:not(.ready) #stage { opacity: 0; }
#stage { transition: opacity .6s; }

.scene {
  position: absolute; width: 1920px; height: 1080px; overflow: hidden;
  background: radial-gradient(ellipse 62% 56% at 50% 48%, #141D38 0%, #0B1020 72%);
  box-shadow: 0 0 0 3px rgba(90, 180, 255, .12);
}
.sc-body { position: static; }
/* Title card: what every scene looks like when it is not the one on screen. Cheap to paint at any zoom. */
.lod { position: absolute; inset: 0; padding: 0 150px; display: flex; flex-direction: column; justify-content: center; gap: 24px; pointer-events: none; opacity: 0; transition: opacity .4s ease; }
.scene.is-lod > .sc-body { visibility: hidden; }
.scene.is-lod > .lod { opacity: 1; transition: none; }
.lod-n { font: 500 64px var(--mono); color: var(--ember); }
.lod-t { font: 800 190px/1.02 var(--sans); letter-spacing: -.03em; color: rgba(242, 244, 248, .4); }
.scene.past .lod-t { color: var(--text); }
.scene.current .lod-t { color: var(--ember); }
.scene.skipped { opacity: .35; }
#world.overview .scene { cursor: pointer; }
#world.overview .scene:hover { box-shadow: 0 0 0 14px var(--ember); }
#vignette { position: absolute; inset: 0; pointer-events: none; z-index: 20; transform: translateZ(0);
  background: radial-gradient(ellipse 72% 68% at 50% 50%, rgba(0,0,0,0) 55%, rgba(0,0,0,.5) 100%); }

.thread { position: absolute; overflow: visible; pointer-events: none; }
.th-faint { fill: none; stroke: rgba(90, 180, 255, .13); stroke-width: 5; stroke-linecap: round; stroke-linejoin: round; }
.th-bright { fill: none; stroke: var(--line); stroke-width: 7; stroke-linecap: round; stroke-linejoin: round; }
.th-dot { fill: rgba(255, 140, 0, .25); }
.th-dot-core { fill: var(--ember); }

.rowlabel { position: absolute; width: 1100px; height: 300px; display: flex; flex-direction: column; justify-content: center; pointer-events: none; }
.rowlabel .rn { font: 500 120px/1 var(--mono); color: rgba(90,180,255,.35); }
.rowlabel .rt { font: 800 150px/1.05 var(--sans); color: rgba(242,244,248,.85); letter-spacing: -.02em; }

/* ------------------------------------------------------------ HUD */
#hud { position: absolute; left: 0; right: 0; bottom: 0; height: 60px; z-index: 40; pointer-events: none; }
#hud .prog { position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: rgba(90,180,255,.08); }
#hud .prog i { position: absolute; inset: 0; background: linear-gradient(90deg, var(--line), var(--ember)); transform-origin: 0 50%; transition: transform 1.2s cubic-bezier(.6,0,.2,1); }
#hud .chap { position: absolute; left: 56px; bottom: 22px; display: flex; align-items: center; gap: 10px; font: 600 16px var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--dim); opacity: .8; }
#hud .chap b { font-weight: 600; margin-right: 8px; }
#hud .chap i { width: 8px; height: 8px; border-radius: 50%; background: rgba(124,135,156,.35); }
#hud .chap i.on { background: var(--ember); box-shadow: 0 0 10px var(--ember); }
body[data-chapter="intro"] #hud .chap, body.mirror #hud { opacity: 0; }

#overlay { position: absolute; inset: 0; z-index: 45; pointer-events: none; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; }

body.blackout #stage { opacity: 0 !important; }
body.blackout #ambient { opacity: 0; }

#help { position: fixed; inset: 0; z-index: 60; display: none; place-items: center; background: rgba(5,7,14,.9); }
body.help #help { display: grid; }
#help .card { background: var(--ink); border: 1px solid #2a3556; border-radius: 20px; padding: 36px 44px; min-width: 560px; font-size: 17px; line-height: 1.9; }
#help h2 { margin: 0 0 14px; font-size: 22px; }
#help kbd { display: inline-block; min-width: 30px; text-align: center; font: 500 14px var(--mono); background: var(--ink2); border: 1px solid #33406a; border-bottom-width: 3px; border-radius: 7px; padding: 1px 8px; margin-right: 10px; }

/* ------------------------------------------------------------ shared scene parts */
.abs { position: absolute; }
.c { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }
.ln { fill: none; stroke: var(--line); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.glyph .dots circle { fill: var(--line); }
.glyph.think .dots circle { animation: think 1.1s ease-in-out infinite; }
.glyph.think .dots circle:nth-child(3n+2) { animation-delay: .15s; }
.glyph.think .dots circle:nth-child(3n) { animation-delay: .3s; }
@keyframes think { 50% { fill: var(--ember); } }
.glyph-label { font: 600 18px var(--sans); letter-spacing: .3em; color: var(--dim); text-align: center; margin-top: 10px; }

.eyebrow { position: absolute; left: 120px; top: 84px; font: 600 22px var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--dim); }
.eyebrow b { color: var(--ember); font-weight: 600; }
.h2 { position: absolute; left: 120px; top: 124px; font: 800 72px/1.08 var(--sans); letter-spacing: -.02em; margin: 0; }
.chapter-title { position: absolute; left: 0; right: 0; top: 380px; text-align: center; }
.chapter-title .k { font: 500 30px var(--mono); color: var(--ember); letter-spacing: .1em; }
.chapter-title .t { font: 800 150px/1.02 var(--sans); letter-spacing: -.03em; margin-top: 18px; }

.bubble { position: absolute; border: 2px solid var(--line); border-radius: 30px; padding: 26px 38px; font-size: 38px; line-height: 1.35; background: rgba(20,29,56,.5); }
.bubble.me { border-color: rgba(242,244,248,.35); background: rgba(242,244,248,.06); }
.bubble.ai { border-color: var(--line); }
.who { font: 600 18px var(--sans); letter-spacing: .22em; text-transform: uppercase; color: var(--dim); margin-bottom: 8px; }

.chatwin { position: absolute; background: #0D1430; border: 1.5px solid #26335c; border-radius: 26px; box-shadow: 0 20px 50px rgba(0,0,0,.4); overflow: hidden; }
.chatwin .bar { height: 54px; display: flex; align-items: center; gap: 10px; padding: 0 24px; border-bottom: 1px solid #1d2850; }
.chatwin .bar i { width: 13px; height: 13px; border-radius: 50%; background: #2a3763; }
.chatwin .bar span { margin-left: auto; font: 500 16px var(--mono); color: var(--dim); }
.chatwin .msgs { position: absolute; left: 0; right: 0; top: 54px; bottom: 96px; padding: 30px 36px; display: flex; flex-direction: column; gap: 22px; }
.chatwin .msg { max-width: 78%; font-size: 30px; line-height: 1.4; }
.chatwin .msg.me { align-self: flex-end; background: #1E2A52; border-radius: 22px 22px 6px 22px; padding: 16px 24px; }
.chatwin .msg.ai { align-self: flex-start; }
.chatwin .input { position: absolute; left: 24px; right: 24px; bottom: 22px; height: 56px; border-radius: 28px; border: 1px solid #26335c; display: flex; align-items: center; padding: 0 24px; font-size: 20px; color: #4c5878; }
.chatwin .input::after { content: ""; margin-left: auto; width: 30px; height: 30px; border-radius: 50%; background: #26335c; }

.script { position: absolute; background: #0E1532; border: 1.5px solid #26335c; border-radius: 18px; padding: 40px 48px; font: 400 27px/1.6 var(--mono); box-shadow: 0 20px 50px rgba(0,0,0,.4); }
.script .hdr { font: 600 16px var(--sans); letter-spacing: .3em; color: var(--dim); margin-bottom: 18px; }
.script .ln2 { display: flex; gap: 26px; }
.script .ln2 > b { flex: none; width: 108px; font-weight: 500; color: var(--dim); font-size: 21px; padding-top: 4px; letter-spacing: .1em; }
.script .ln2.ai > span { color: #cfe6ff; }
.script .ln2.sys > b { color: var(--ember); }
.script .ln2.tool > span { color: var(--ember); }
.script .ln2.res > span { color: var(--mint); }

.note { position: absolute; width: 300px; min-height: 170px; padding: 24px 26px; background: var(--paper); color: #2b2a26; font: 500 24px/1.4 var(--mono); border-radius: 3px; box-shadow: 0 18px 40px rgba(0,0,0,.45), inset 0 -18px 30px rgba(0,0,0,.05); }
.note::before { content: ""; position: absolute; left: 50%; top: -14px; width: 110px; height: 30px; margin-left: -55px; background: rgba(232,228,216,.45); transform: rotate(-2deg); }

.pcol { position: absolute; }
.prow { position: absolute; left: 0; height: 50px; width: 100%; display: flex; align-items: center; font-size: 30px; font-weight: 600; white-space: nowrap; --glow: 0; }
.prow .pl { width: 230px; flex: none; color: color-mix(in srgb, var(--ember) calc(var(--glow) * 100%), var(--text)); }
.prow .pb { width: 220px; height: 2px; background: var(--faint); position: relative; flex: none; }
.prow .pb i { position: absolute; left: 0; top: -2px; height: 6px; width: 100%; border-radius: 3px; transform-origin: 0 50%;
  background: color-mix(in srgb, var(--ember) calc(var(--glow) * 100%), var(--line)); }
.prow .pp { margin-left: 24px; color: var(--dim); font-weight: 400; font-size: 24px; }
.pcol.clickable .prow { cursor: pointer; border-radius: 10px; }
.pcol.clickable .prow:hover .pl { color: var(--ember); }

.takeaway { position: absolute; left: 120px; right: 120px; bottom: 96px; display: flex; align-items: baseline; gap: 28px; }
.takeaway .k { font: 500 24px var(--mono); color: var(--ember); flex: none; }
.takeaway .t { font: 700 46px/1.25 var(--sans); letter-spacing: -.01em; }
.takeaway .t em { font-style: normal; color: var(--ember); }

.pill { display: inline-flex; align-items: center; gap: 12px; padding: 10px 22px; border-radius: 999px; border: 1.5px solid #2c3a66; font: 600 22px var(--sans); color: var(--text); background: rgba(20,29,56,.6); }
.btn { cursor: pointer; padding: 16px 28px; border-radius: 16px; border: 2px solid #2c3a66; background: rgba(20,29,56,.7); color: var(--text); font: 600 26px var(--sans); transition: border-color .2s, background .2s, transform .15s; }
.btn:hover { border-color: var(--line); }
.btn:active { transform: scale(.97); }
.btn.on { border-color: var(--ember); background: rgba(255,140,0,.12); color: #ffd3a1; }
.btn:focus-visible, .pcol .prow:focus-visible { outline: 3px solid var(--ember); outline-offset: 4px; }
.tag { font: 500 20px var(--mono); color: var(--dim); }
.strike { position: absolute; left: -6px; right: -6px; top: 54%; height: 3px; background: var(--alarm); transform-origin: 0 50%; transform: scaleX(0); border-radius: 2px; }
.qrbox { display: flex; align-items: center; gap: 28px; }
.qrbox .qr { display: block; border-radius: 14px; }
.qrbox .lbl { font: 600 26px/1.35 var(--sans); }
.qrbox .lbl small { display: block; font: 500 20px var(--mono); color: var(--dim); margin-top: 6px; }
a.qrbox { color: inherit; text-decoration: none; }
a.qrbox:focus-visible { outline: 3px solid var(--ember); outline-offset: 8px; border-radius: 14px; }
.mono { font-family: var(--mono); }
.ember { color: var(--ember); } .mint { color: var(--mint); } .alarm { color: var(--alarm); } .dim { color: var(--dim); }

/* ------------------------------------------------------------ on-screen controls
   For visitors on the site and for a laptop without a clicker. Sized in real pixels, outside the scaled stage.
   Hidden until the pointer is near the bottom edge. Always there on touch screens. */
#ctl { position: fixed; left: 50%; bottom: calc(16px + env(safe-area-inset-bottom, 0px)); transform: translateX(-50%); z-index: 55;
  display: flex; align-items: center; gap: 4px; padding: 5px; border-radius: 999px; background: rgba(13, 20, 48, .94); border: 1px solid #2a3556;
  opacity: 0; pointer-events: none; transition: opacity .25s; }
body.ctl-on #ctl { opacity: 1; pointer-events: auto; }
#ctl button, #ctl .home { display: grid; place-items: center; height: 44px; min-width: 44px; padding: 0; border: 0; border-radius: 999px; background: none;
  color: var(--text); font: 600 16px var(--sans); cursor: pointer; text-decoration: none; }
#ctl .home { padding: 0 16px 0 14px; white-space: nowrap; color: var(--dim); }
#ctl button.fwd { background: var(--ember); color: var(--night); }
#ctl button:hover, #ctl .home:hover { background: var(--ink2); color: var(--text); }
#ctl button.fwd:hover { background: #ffa733; color: var(--night); }
#ctl button:focus-visible, #ctl .home:focus-visible { outline: 2px solid var(--ember); outline-offset: 2px; }
#ctl svg { fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
body.laser #ctl, body.blackout #ctl, body.help #ctl { display: none; }
@media (hover: none) { #ctl { opacity: 1; pointer-events: auto; } }
@media (max-width: 360px) { #ctl button[data-k="h"], #ctl button[data-k="f"] { display: none; } }

/* Phones held upright: the 16:9 picture gets very small. Say so, under the picture. */
#rotate { display: none; }
@media (orientation: portrait) and (max-width: 600px) {
  body[data-mode="deck"] #rotate { display: block; position: fixed; left: 0; right: 0; top: calc(50% + 28.125vw + 18px); z-index: 30; text-align: center;
    font: 500 13px var(--mono); color: var(--dim); pointer-events: none; }
}

/* ------------------------------------------------------------ presenter view */
#presenter[hidden] { display: none; }
body[data-mode="presenter"] { overflow: auto; background: #070a14; }
body[data-mode="presenter"] #stage, body[data-mode="presenter"] #ambient, body[data-mode="presenter"] #laser { display: none; }
#presenter { position: fixed; inset: 0; display: grid; grid-template-rows: auto 1fr auto; font-size: 18px; }
#presenter header { display: flex; align-items: center; gap: 32px; padding: 16px 28px; border-bottom: 1px solid #1c2440; }
#presenter .clock { font: 600 28px var(--mono); color: var(--dim); }
#presenter .timer { display: flex; align-items: center; gap: 12px; font: 600 40px var(--mono); }
#presenter .timer button, #presenter .btns button { font: 600 15px var(--sans); background: var(--ink); color: var(--text); border: 1px solid #2a3556; border-radius: 8px; padding: 8px 14px; cursor: pointer; }
#presenter #pPace { color: var(--dim); } #pPace b { color: var(--mint); } #pPace b.late { color: var(--alarm); } #pPace b.early { color: var(--line); }
#presenter #pPos { margin-left: auto; font: 500 22px var(--mono); color: var(--dim); }
#presenter main { display: grid; grid-template-columns: 1.25fr 1fr; gap: 28px; padding: 24px 28px; min-height: 0; }
#presenter .now { min-height: 0; overflow: auto; }
#presenter .eyebrow { position: static; font-size: 15px; }
#presenter h1 { margin: 8px 0 14px; font-size: 40px; letter-spacing: -.01em; }
#presenter .stopbar { display: flex; gap: 6px; margin-bottom: 20px; }
#presenter .stopbar i { flex: 1; max-width: 70px; height: 6px; border-radius: 3px; background: #1c2440; }
#presenter .stopbar i.done { background: #31508a; } #presenter .stopbar i.on { background: var(--ember); }
#presenter .notes { font-size: 30px; line-height: 1.45; max-width: 46ch; }
#presenter .hint { margin-top: 22px; font: 500 17px var(--mono); color: var(--line); }
#presenter aside .label { font: 600 13px var(--sans); letter-spacing: .2em; text-transform: uppercase; color: var(--dim); margin-bottom: 8px; }
#presenter .frame { position: relative; width: 100%; aspect-ratio: 16/9; border-radius: 12px; overflow: hidden; border: 1px solid #2a3556; background: #000; }
#presenter iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; pointer-events: none; }
#presenter .nextnote { margin-top: 12px; color: var(--dim); font-size: 17px; line-height: 1.45; min-height: 3em; }
#presenter .btns { display: flex; gap: 10px; margin-top: 12px; } #presenter .btns button { flex: 1; font-size: 20px; padding: 14px; }
#presenter nav { display: flex; gap: 6px; padding: 12px 28px 18px; overflow-x: auto; border-top: 1px solid #1c2440; }
#presenter nav button { flex: none; font: 600 13px var(--sans); background: var(--ink); color: #c7cedd; border: 1px solid #2a3556; border-radius: 8px; padding: 8px 12px; cursor: pointer; text-align: left; }
#presenter nav button small { display: block; color: var(--dim); font-weight: 400; margin-top: 2px; }
#presenter nav button.on { border-color: var(--ember); color: #fff; }
#presenter nav button.ch-llm { border-top: 3px solid #2f6aa8; } #presenter nav button.ch-chatt { border-top: 3px solid #3b8f6a; }
#presenter nav button.ch-agent { border-top: 3px solid #a8662f; } #presenter nav button.ch-final { border-top: 3px solid #8a4fb0; }
.pwarn { position: fixed; left: 50%; bottom: 90px; transform: translateX(-50%); background: #3a1418; border: 1px solid var(--alarm); padding: 12px 18px; border-radius: 10px; display: none; }
.pwarn.on { display: block; }

@media (prefers-reduced-motion: reduce) {
  .glyph.think .dots circle { animation: none; }
  .scene { transition: none; }
}