/* Inside AI: a full-screen, state-based experience. Own presentation, same palette and type as the site (Topo's chrome). */
@font-face{font-family:"Inter";font-style:normal;font-weight:100 900;font-display:swap;src:url(/fonts/inter-latin.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root,html[data-theme="dark"]{--bg:#000;--panel:#1d1d1f;--panel2:#2c2c2e;--ink:#f5f5f7;--mute:#a1a1a6;--line:rgba(255,255,255,.16);--accent:#2997ff;--accent-ink:#fff;--nora:#ff9f0a;--velite:#bf5af2;--warn:#ff6961;--good:#30d158;--glow:radial-gradient(60rem 36rem at 50% -10%,rgba(41,151,255,.16),transparent 70%)}
html[data-theme="light"]{--bg:#fff;--panel:#f5f5f7;--panel2:#e8e8ed;--ink:#1d1d1f;--mute:#6e6e73;--line:rgba(0,0,0,.18);--accent:#0071e3;--accent-ink:#fff;--nora:#c76a00;--velite:#8e3fc4;--warn:#d70015;--good:#1a7f37;--glow:radial-gradient(60rem 36rem at 50% -10%,rgba(0,113,227,.09),transparent 70%)}
*{box-sizing:border-box}
html,body{height:100%;margin:0;overflow:hidden;background:var(--bg);color:var(--ink);font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;font-feature-settings:"kern","calt","cv11";letter-spacing:-.011em;-webkit-font-smoothing:antialiased}
body{background:var(--glow),var(--bg);overscroll-behavior:none}
h1,h2,h3,p,ol,ul{margin:0}
button,input,select{font:inherit;color:inherit;letter-spacing:inherit}
.sr{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:fixed;left:8px;top:-60px;z-index:60;background:var(--accent);color:var(--accent-ink);padding:10px 14px;border-radius:10px;text-decoration:none;font-weight:600}.skip:focus{top:8px}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px;border-radius:8px}
.num,output,.vec{font-variant-numeric:tabular-nums}

/* chrome */
.top{position:fixed;inset:0 0 auto 0;height:56px;z-index:20;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 max(16px,env(safe-area-inset-right)) 0 max(16px,env(safe-area-inset-left))}
.home{display:inline-flex;align-items:center;gap:6px;color:var(--mute);text-decoration:none;font-size:.82rem;font-weight:500;min-height:44px}.home:hover{color:var(--ink)}
.prog{display:flex;align-items:center;gap:12px;font-size:.78rem;font-weight:600;letter-spacing:.12em}
.prog__n{color:var(--mute);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.top__r{justify-self:end;display:flex;gap:4px}
.ibtn{display:inline-grid;place-items:center;min-width:44px;min-height:44px;border:0;border-radius:12px;background:transparent;color:var(--mute);cursor:pointer}.ibtn:hover{color:var(--ink);background:var(--panel)}
.ibtn.sm{min-width:40px;min-height:40px;background:var(--panel);color:var(--ink);border:1px solid var(--line);font-weight:600;font-size:.82rem;padding:0 10px;border-radius:10px}
.foot{position:fixed;inset:auto 0 0 0;height:72px;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:0 max(16px,env(safe-area-inset-right)) env(safe-area-inset-bottom) max(16px,env(safe-area-inset-left))}
.hint{flex:1;text-align:center;color:var(--mute);font-size:.85rem;min-height:1em}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border-radius:999px;border:1px solid var(--line);background:var(--panel);color:var(--ink);font-weight:600;font-size:.95rem;cursor:pointer;transition:background .15s,transform .15s,border-color .15s}
.btn:hover{border-color:var(--mute)}.btn:active{transform:scale(.98)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}.btn.primary:hover{filter:brightness(1.08)}
.btn.ghost{background:transparent}.btn[disabled]{opacity:.38;cursor:not-allowed}
.btn[aria-pressed="true"]:not(.primary){border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.btn.huge{min-height:60px;padding:0 38px;font-size:1.1rem}.btn.big-btn{min-height:56px;padding:0 26px;font-size:1.05rem}.btn.small{min-height:40px;font-size:.85rem;padding:0 16px}
.btn kbd{font:600 .68rem/1 inherit;padding:3px 6px;border-radius:5px;border:1px solid var(--line);color:var(--mute)}
.link{background:none;border:0;color:var(--accent);font-weight:600;cursor:pointer;min-height:44px;padding:0 6px;font-size:.88rem}.link:hover{text-decoration:underline}
.link.pulse{animation:pulse 1.6s ease-in-out 3}
@keyframes pulse{50%{opacity:.45}}
.nojs{position:fixed;inset:80px 24px auto;text-align:center}

/* stage and scene transitions */
#stage{position:fixed;inset:56px 0 72px 0;outline:0}
.scene{position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;padding:8px max(20px,env(safe-area-inset-left)) 24px;opacity:0;transition:opacity .35s ease,transform .45s cubic-bezier(.2,.8,.2,1);display:flex}
.scene.in-fwd{transform:translateY(22px)}.scene.in-back{transform:translateY(-22px)}.scene.in{opacity:1;transform:none}
.scene.out-fwd{opacity:0;transform:translateY(-22px);transition-duration:.18s}.scene.out-back{opacity:0;transform:translateY(22px);transition-duration:.18s}
.wrap{margin:auto;width:100%;max-width:1180px;padding:8px 0;outline:0}
.wrap.center{display:flex;flex-direction:column;align-items:center;text-align:center;gap:18px}
.wrap.swap{animation:swapin .5s cubic-bezier(.2,.8,.2,1)}@keyframes swapin{from{opacity:0;transform:translateY(14px)}}

/* type */
.kicker{font-size:.75rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}
.giant{font-size:clamp(2.2rem,7.2vw,5.8rem);line-height:1.02;font-weight:650;letter-spacing:-.035em;max-width:18ch;text-wrap:balance}
.big{font-size:clamp(1.8rem,4.6vw,3.5rem);line-height:1.06;font-weight:650;letter-spacing:-.03em;text-wrap:balance;max-width:22ch}.big.sm{font-size:clamp(1.4rem,3vw,2.2rem);max-width:26ch}.big.narrow{max-width:16ch}
.center .big,.center .giant{margin-inline:auto}
.lede{font-size:clamp(1.05rem,2vw,1.5rem);line-height:1.4;max-width:32ch;color:var(--ink);text-wrap:balance}
.sub{font-size:1.05rem;line-height:1.5;color:var(--mute);max-width:44ch;text-wrap:pretty}.sub.small,.small{font-size:.9rem}.dim{color:var(--mute)}.center .sub{margin-inline:auto}
.reveal{font-size:clamp(1.05rem,1.8vw,1.35rem);font-weight:600;line-height:1.4;max-width:40ch;padding-left:16px;border-left:3px solid var(--accent);text-align:left;animation:swapin .5s both;text-wrap:balance}
.center .reveal{text-align:center;border-left:0;padding:0;color:var(--ink)}
.reveal[hidden],[hidden]{display:none!important}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:center}
.key{display:flex;gap:16px;flex-wrap:wrap;align-items:center;font-size:.82rem;color:var(--mute)}.kx{white-space:nowrap}
.mk{vertical-align:-2px}

/* 00 opening */
.step-count{letter-spacing:.5em;font-size:.6rem}.step-count span{opacity:.25}
.chips{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;max-width:760px}.chips.col{flex-direction:column;align-items:stretch;max-width:560px;width:100%}
.chip{min-height:52px;padding:12px 22px;border-radius:16px;border:1px solid var(--line);background:var(--panel);font-weight:550;font-size:1.02rem;cursor:pointer;text-align:left}.chip:hover{border-color:var(--mute)}
.chip[aria-pressed="true"]{border-color:var(--accent);box-shadow:inset 0 0 0 1px var(--accent)}
.fb,.feedback{min-height:3em;max-width:46ch;color:var(--ink);font-size:1.05rem;line-height:1.5}
.dotfield{width:min(960px,92vw);height:min(38vh,360px)}.dotfield canvas{width:100%;height:100%;display:block}

/* 01 robot */
.flow3{display:flex;gap:14px;align-items:center;font-weight:700;letter-spacing:.12em;font-size:clamp(.9rem,2.4vw,1.4rem)}.flow3 i{font-style:normal;color:var(--accent)}
.stepper{list-style:none;padding:0;display:flex;gap:6px;font-size:.78rem;font-weight:700;letter-spacing:.14em;color:var(--mute)}
.stepper li{padding:8px 16px;border-radius:999px;border:1px solid var(--line)}.stepper li.on{color:var(--ink)}.stepper li[aria-current]{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.plot{width:min(820px,94vw);height:min(44vh,400px);border:1px solid var(--line);border-radius:22px;background:color-mix(in srgb,var(--panel) 60%,transparent)}.plot canvas{width:100%;height:100%;display:block}
.cap{min-height:3.2em}

/* creatures, tiles */
.creature{display:block;width:100%;height:auto}
.specimen{width:min(300px,52vw);margin-inline:auto;filter:drop-shadow(0 18px 40px rgba(0,0,0,.28))}.specimen.sm{width:min(180px,34vw)}
.tile{position:relative;display:block;width:100%;padding:0;border:2px solid transparent;border-radius:16px;background:var(--panel);overflow:hidden;cursor:pointer;text-align:center}
div.tile{cursor:default}.tile .creature{border-radius:12px}.tile.sel{border-color:var(--accent)}.tile.on{background:var(--panel2)}
.tile.ok{border-color:color-mix(in srgb,var(--good) 55%,transparent)}.tile.bad{border-color:var(--warn)}
.badge{display:flex;gap:5px;align-items:center;justify-content:center;font-size:.72rem;font-weight:700;padding:5px 4px;color:var(--ink);min-height:26px}
.tile.bad .badge{color:var(--warn)}
.tiles,.tilegrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(78px,1fr));gap:8px}.tilegrid{grid-template-columns:repeat(6,1fr);max-width:620px}

/* 02 labels */
.split{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.85fr);gap:clamp(20px,4vw,56px);align-items:center}
.lab{display:flex;flex-direction:column;gap:14px;align-items:center;text-align:center}
.desc{color:var(--mute);max-width:40ch;min-height:3em;line-height:1.45}
.decide{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.dataset{display:flex;flex-direction:column;gap:12px;padding:20px;border:1px solid var(--line);border-radius:22px;background:color-mix(in srgb,var(--panel) 70%,transparent)}
.given .tiles{grid-template-columns:repeat(2,minmax(80px,110px))}

/* 03 train */
.train{display:flex;flex-direction:column;gap:22px;align-items:center}
.train__row{display:flex;align-items:center;gap:clamp(12px,3vw,40px);justify-content:center;width:100%}
.train__data{display:grid;grid-template-columns:repeat(4,52px);gap:6px}.mini{display:block;width:52px}.mini[data-k="0"] .creature{outline:2px solid var(--nora);border-radius:10px}.mini[data-k="1"] .creature{outline:2px solid var(--velite);border-radius:10px}
.train__arrow{font-size:2rem;color:var(--accent)}
.train__model{position:relative;width:min(340px,40vw);height:210px;border:2px solid var(--accent);border-radius:24px;padding:34px 14px 30px;background:color-mix(in srgb,var(--panel) 70%,transparent)}
.mlabel{position:absolute;top:10px;left:16px;font-weight:700;letter-spacing:.16em;font-size:.72rem;color:var(--accent)}.mnum{position:absolute;bottom:8px;left:16px;right:16px;font-size:.82rem;color:var(--mute);text-align:right}
.train__model canvas{width:100%;height:100%;display:block}
.pcard{display:flex;gap:28px;align-items:center;justify-content:center;flex-wrap:wrap;text-align:left}.pcard>div:last-child{display:flex;flex-direction:column;gap:14px;max-width:520px}
.result{display:flex;align-items:baseline;gap:18px;flex-wrap:wrap}
.rbig{display:inline-flex;gap:10px;align-items:center;font-size:clamp(1.6rem,4vw,2.6rem);font-weight:700;letter-spacing:-.02em}.rbig.sm{font-size:1.4rem}
.rconf{font-weight:700;letter-spacing:.1em;color:var(--accent);font-size:.9rem}

/* 04 numbers */
.seg{display:inline-flex;padding:4px;border-radius:999px;border:1px solid var(--line);background:var(--panel);gap:2px}
.seg button{border:0;background:transparent;padding:0 20px;min-height:44px;border-radius:999px;font-weight:600;color:var(--mute);cursor:pointer;font-size:.9rem}.seg.sm button{min-height:36px;padding:0 14px;font-size:.82rem}
.seg{max-width:100%;flex-wrap:wrap;justify-content:center}.seg button[aria-pressed="true"],.seg button[aria-selected="true"]{background:var(--ink);color:var(--bg)}
.numbers{display:flex;flex-direction:column;align-items:center;gap:20px;text-align:center}
.numstage{position:relative;display:grid;grid-template-columns:minmax(0,1fr);justify-items:center;align-items:center;width:100%;max-width:900px;min-height:340px}
.numstage .specimen{grid-area:1/1;transition:transform .8s cubic-bezier(.2,.8,.2,1),opacity .6s}
.frows{grid-area:1/1;list-style:none;padding:0;display:grid;gap:7px;width:min(430px,70vw);justify-self:end;opacity:0;pointer-events:none}
.frow{display:grid;grid-template-columns:100px 1fr 54px;gap:12px;align-items:center;font-size:.92rem;text-align:left;transform:translateX(-24px);opacity:0;transition:transform .6s cubic-bezier(.2,.8,.2,1) var(--d),opacity .5s var(--d)}
.fname{font-weight:600}.fbar{height:8px;border-radius:5px;background:var(--line);overflow:hidden}.fbar i{display:block;height:100%;width:calc(var(--v)*100%);background:var(--accent);border-radius:5px}.fnum{text-align:right;font-weight:700}
.vec{grid-area:1/1;align-self:end;font-size:clamp(.78rem,2.4vw,1.2rem);color:var(--accent);font-weight:700;opacity:0;transition:opacity .6s;max-width:100%;overflow-wrap:anywhere}
.numstage[data-view="model"] .specimen{transform:translateX(-110%) scale(.7);opacity:.9}
.numstage[data-view="model"] .frows{opacity:1;pointer-events:auto}.numstage[data-view="model"] .frow{transform:none;opacity:1}
.vec[data-on="1"]{opacity:1}
.numstage[data-view="model"]{padding-bottom:36px}

/* 05 space */
.space{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:22px;align-items:stretch;height:100%;max-height:calc(100dvh - 150px);min-height:480px}
.space__view{position:relative;display:flex;flex-direction:column;gap:10px;min-height:0}
#cv{flex:1;min-height:320px;width:100%;border:1px solid var(--line);border-radius:22px;background:color-mix(in srgb,var(--panel) 55%,transparent);touch-action:none;cursor:grab}#cv:active{cursor:grabbing}
.space__tools{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.space__panel{display:flex;flex-direction:column;gap:12px;overflow-y:auto;padding-right:4px;min-height:0}
.axes{display:flex;gap:10px;flex-wrap:wrap}.axes label{display:flex;gap:6px;align-items:center;font-weight:700;font-size:.78rem;color:var(--mute)}
select{min-height:40px;border-radius:10px;border:1px solid var(--line);background:var(--panel);padding:0 10px;font-weight:550;font-size:.88rem}
.toggles{display:flex;gap:14px;flex-wrap:wrap}.sw{display:inline-flex;align-items:center;gap:7px;font-size:.88rem;font-weight:550;min-height:36px}.sw input{width:20px;height:20px;accent-color:var(--accent)}
.probe{display:flex;gap:16px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:18px;background:color-mix(in srgb,var(--panel) 70%,transparent)}.probe #pread{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}.probe .specimen{margin:0;flex:none}
.meter{position:relative;height:10px;border-radius:6px;background:linear-gradient(90deg,var(--nora),var(--velite));opacity:.85}.meter i{position:absolute;top:-3px;bottom:-3px;width:4px;margin-left:-2px;border-radius:2px;background:var(--ink)}.meter b{position:absolute;left:50%;top:-5px;bottom:-5px;border-left:2px dashed var(--ink)}

details{border:1px solid var(--line);border-radius:14px;padding:4px 14px}summary{min-height:44px;display:flex;align-items:center;cursor:pointer;font-weight:600;font-size:.92rem}
.sl{display:grid;grid-template-columns:76px 1fr 40px;gap:10px;align-items:center;font-size:.85rem;min-height:36px}.sl input{width:100%;accent-color:var(--accent);height:28px}
.edit .btn{margin:6px 0 10px}
.tscroll{max-height:220px;overflow:auto;font-size:.78rem}table{border-collapse:collapse;width:100%}th,td{padding:5px 8px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.ask{padding:14px;border:1px solid var(--accent);border-radius:18px;display:flex;flex-direction:column;gap:12px}.ask h3{font-size:1.1rem;line-height:1.3}

/* 06 confidence */
.conf{gap:12px}.bigpct{display:flex;flex-direction:column;align-items:center;font-weight:700;letter-spacing:.18em;font-size:.9rem;color:var(--accent)}.bigpct .num{font-size:clamp(4rem,14vw,8rem);letter-spacing:-.04em;line-height:1;color:var(--ink)}
.pred{display:inline-flex;gap:10px;align-items:center;font-size:1.3rem;font-weight:650}
.verdict{display:flex;flex-direction:column;align-items:center;gap:6px;animation:swapin .5s both}.verdict .bad{font-size:clamp(2.4rem,8vw,5rem);font-weight:750;letter-spacing:-.03em;color:var(--warn)}.verdict p{font-size:1.2rem}

/* 07 shortcut */
.short{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.8fr);gap:clamp(20px,4vw,48px);align-items:start}.short__l,.short__r{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.gauge{position:relative;width:150px;flex:none;display:flex;flex-direction:column;align-items:center;gap:6px}.gauge svg{width:150px;height:150px;display:block}.gnum{position:absolute;top:0;left:0;width:150px;height:150px;display:grid;place-items:center;font-size:2.2rem;font-weight:700;letter-spacing:-.03em}.glab{text-align:center;font-size:.76rem;color:var(--mute);font-weight:600;line-height:1.25;max-width:170px}
#panel{width:100%;display:flex;flex-direction:column;gap:10px;min-height:190px}
.irow,.drow{display:grid;grid-template-columns:96px 1fr 44px;gap:10px;align-items:center;font-size:.88rem}.irow.hot span:first-child{font-weight:800;color:var(--accent)}
.ibar,.dbar{height:12px;border-radius:7px;background:var(--line);overflow:hidden;display:flex}.ibar i{background:var(--mute);border-radius:7px}.irow.hot .ibar i{background:var(--accent)}
.drow{grid-template-columns:100px 1fr}.dbar{height:26px}.dbar i{display:grid;place-items:center;font-size:.72rem;font-weight:700;font-style:normal}.dbar .lt{background:#e6e8ec;color:#1d1d1f}.dbar .dk{background:#3a3d44;color:#f5f5f7}
.sw.lt,.sw.dk{padding:2px 10px;border-radius:999px;min-height:0;font-size:.74rem}.sw.lt{background:#e6e8ec;color:#1d1d1f}.sw.dk{background:#3a3d44;color:#f5f5f7}
.gauges{display:flex;gap:28px;flex-wrap:wrap}
.short__r .reveal{margin-top:6px}

/* 08 fix */
.fix{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(20px,4vw,48px);align-items:start}.fix__l{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.opts{display:grid;gap:8px;width:100%}.opt{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:14px;cursor:pointer;background:color-mix(in srgb,var(--panel) 65%,transparent)}.opt:has(input:checked){border-color:var(--accent)}.opt input{width:22px;height:22px;margin-top:2px;accent-color:var(--accent);flex:none}.opt b{display:block;font-size:.98rem}.opt small{display:block;color:var(--mute);font-size:.82rem;line-height:1.35;margin-top:2px}
.fix__r{display:flex;flex-direction:column;gap:16px}
table.cmp{font-size:.95rem}table.cmp th,table.cmp td{padding:10px 8px;text-align:right}table.cmp th:first-child{text-align:left;font-weight:600;white-space:normal}table.cmp thead th{font-size:.72rem;letter-spacing:.14em;color:var(--mute)}
td.up{color:var(--good);font-weight:800}
.bars{display:grid;gap:10px}.brow{display:grid;grid-template-columns:130px 1fr;gap:12px;align-items:center;font-size:.82rem;color:var(--mute)}.bpair{display:grid;gap:4px}.bpair i{display:block;height:10px;border-radius:6px}.bpair .b{background:var(--mute);opacity:.6}.bpair .a{background:var(--accent);transition:width .8s cubic-bezier(.2,.8,.2,1)}
.more p{padding:0 0 12px;line-height:1.5;color:var(--mute);font-size:.92rem}

/* 09 overfit */
.over{display:flex;flex-direction:column;gap:16px;align-items:center;text-align:center}
.maps{display:grid;grid-template-columns:1fr 1fr;gap:20px;width:100%;max-width:980px}
.mapf{margin:0;display:flex;flex-direction:column;gap:8px;align-items:center}.mapf canvas{width:100%;aspect-ratio:1.25;max-height:30vh;border:1px solid var(--line);border-radius:18px;background:var(--panel)}.mapf figcaption{display:flex;flex-direction:column;gap:2px}
.mres table{width:auto;margin:0 auto}.mres th{font-weight:600;color:var(--mute)}.mres td{font-weight:800;font-size:1.2rem}
.over .reveal{text-align:left;max-width:60ch}

/* 10 to 12 text */
.tok,.temp,.pl{display:flex;flex-direction:column;align-items:center;gap:16px;text-align:center}
.prompt{font-size:clamp(1.5rem,4vw,2.8rem);font-weight:600;letter-spacing:-.025em;line-height:1.25;max-width:24ch;text-wrap:balance;min-height:1.3em}.prompt.q{max-width:28ch}.prompt.a{color:var(--accent)}
.caret{display:inline-block;width:3px;height:1em;background:var(--accent);margin-left:4px;vertical-align:-.12em;border-radius:2px}
.flow4{list-style:none;padding:0;display:flex;gap:8px;flex-wrap:wrap;justify-content:center;font-size:.7rem;font-weight:700;letter-spacing:.14em;color:var(--mute)}.flow4 li{padding:7px 12px;border-radius:999px;border:1px solid var(--line);transition:all .25s}.flow4 li.on{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.cands{display:grid;gap:8px;width:min(560px,100%)}.cbtn,.cand{display:grid;grid-template-columns:minmax(80px,140px) 1fr 52px;gap:14px;align-items:center;padding:10px 16px;border-radius:14px;border:1px solid var(--line);background:var(--panel);font-size:1.05rem;min-height:48px;text-align:left}.cand{border-color:transparent;background:transparent}
.cbtn{cursor:pointer}.cbtn:hover{border-color:var(--accent)}.cw{font-weight:650}.cb{height:10px;border-radius:6px;background:var(--line);overflow:hidden}.cb i{display:block;height:100%;background:var(--accent);border-radius:6px;transition:width .5s cubic-bezier(.2,.8,.2,1)}.cp{text-align:right;font-weight:700}
.zoom{display:flex;flex-direction:column;align-items:center;gap:22px}.zoom{display:flex;flex-direction:column;align-items:center;gap:22px}.stack{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:center;font-size:clamp(.8rem,2vw,1.15rem);font-weight:700;letter-spacing:.12em}.stack .pl,.stack .eq{color:var(--accent);font-size:1.6em;letter-spacing:0}.stack b{padding:8px 16px;border-radius:12px;background:var(--accent);color:var(--accent-ink)}
.dial{width:min(620px,100%);display:flex;flex-direction:column;gap:6px}.dial label{display:flex;justify-content:space-between;font-size:.74rem;font-weight:700;letter-spacing:.16em;color:var(--mute)}.dial input{width:100%;height:40px;accent-color:var(--accent)}
.runs{list-style:none;padding:0;display:grid;gap:6px;max-width:68ch;text-align:left;font-size:1.02rem;line-height:1.4}.runs li{padding:8px 14px;border-radius:12px;background:var(--panel)}
.cands.plain{margin-bottom:0}
.alarm .big{color:var(--warn);max-width:none}
.ptest{display:flex;gap:12px}.pmeters{display:grid;gap:8px;width:min(560px,100%)}.pm{display:grid;grid-template-columns:110px 1fr;gap:4px 12px;align-items:center;text-align:left;font-size:.9rem;font-weight:600}.pm .small{grid-column:1/-1;font-weight:400;color:var(--mute)}.pbar{height:10px;border-radius:6px;background:var(--line);overflow:hidden}.pbar i{display:block;height:100%;background:var(--accent)}
.bigsign{font-size:clamp(1.8rem,6vw,4rem);font-weight:750;letter-spacing:-.03em;animation:swapin .6s both}
.plain .cand{padding:6px 16px}

/* 13 what is AI */
.what{display:flex;flex-direction:column;align-items:center;gap:22px;text-align:center}
.chain{list-style:none;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;width:100%;max-width:1100px}
.node{padding:16px 10px;border:1px solid var(--line);border-radius:16px;display:flex;flex-direction:column;gap:6px;opacity:.28;transition:all .5s cubic-bezier(.2,.8,.2,1);position:relative}.node b{letter-spacing:.1em;font-size:.82rem}.node small{color:var(--mute);line-height:1.35;font-size:.8rem}.node.on{opacity:1;border-color:var(--accent);transform:translateY(-4px)}
.people{list-style:none;padding:0;display:flex;gap:10px;flex-wrap:wrap;justify-content:center;max-width:1000px}.people li{padding:10px 18px;border-radius:999px;border:1px dashed var(--line);font-weight:600;font-size:.92rem;opacity:.25;transition:all .5s}.people li.on{opacity:1;border-style:solid;border-color:var(--velite);background:color-mix(in srgb,var(--velite) 12%,transparent)}

/* 14 investigator, 15 final */
.inv,.fin{display:flex;flex-direction:column;align-items:center;gap:18px;text-align:center}
.syspick{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;width:min(640px,100%)}.sysbtn{display:flex;gap:14px;align-items:center;min-height:76px;padding:14px 20px;border-radius:18px;border:1px solid var(--line);background:var(--panel);font-weight:650;font-size:1.02rem;cursor:pointer;text-align:left}.sysbtn:hover{border-color:var(--accent)}.ico{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent);font-size:1.3rem;flex:none}
.pipe{list-style:none;padding:0;display:grid;gap:8px;width:min(680px,100%);text-align:left}.pipe li{display:grid;grid-template-columns:150px 1fr;gap:14px;padding:12px 16px;border:1px solid var(--line);border-radius:14px;opacity:.5;align-items:center}.pipe li.on{opacity:1;border-color:var(--accent)}.pipe li.on.bad{border-color:var(--warn)}.pipe small{font-weight:700;letter-spacing:.12em;font-size:.68rem;color:var(--mute)}
.feedback{min-height:4.5em}
.closing{display:grid;gap:4px;font-size:clamp(1.3rem,3.6vw,2.4rem);font-weight:700;letter-spacing:-.02em;animation:swapin .6s both}
.fin .chips.col{margin-top:6px}

/* menu */
dialog{border:1px solid var(--line);border-radius:22px;background:var(--panel);color:var(--ink);padding:0;width:min(520px,92vw);max-height:86vh}dialog.wide{width:min(860px,94vw)}dialog::backdrop{background:rgba(0,0,0,.6)}
.menu__in{padding:20px;display:flex;flex-direction:column;gap:12px;max-height:86vh}.menu__in h2{font-size:1.2rem}
.menu__item{display:flex;gap:14px;width:100%;min-height:46px;align-items:center;padding:0 12px;border:0;border-radius:12px;background:transparent;cursor:pointer;text-align:left;font-weight:550}.menu__item:hover:not([disabled]){background:var(--panel2)}.menu__item[disabled]{opacity:.35;cursor:not-allowed}.menu__item[aria-current]{color:var(--accent)}.menu__n{font-variant-numeric:tabular-nums;color:var(--mute);width:2ch}
.menu__row{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}

/* phones and narrow windows: recompose, do not shrink */
@media (max-width:860px){
  .top{grid-template-columns:auto 1fr auto}.home span{display:none}.prog{justify-self:center}
  .split,.short,.fix{grid-template-columns:minmax(0,1fr)}.space{grid-template-columns:1fr;max-height:none;height:auto}#cv{min-height:300px;height:52vh;flex:none}.space__panel{overflow:visible}
  .train__row{flex-direction:column}.train__arrow{transform:rotate(90deg)}.train__model{width:min(340px,86vw)}
  .maps{grid-template-columns:1fr 1fr;gap:10px}.tilegrid{grid-template-columns:repeat(4,1fr)}
  .chain{grid-template-columns:1fr 1fr}.syspick{grid-template-columns:1fr}.pipe li{grid-template-columns:1fr;gap:2px}
  .numstage{min-height:520px}.frows{justify-self:center;align-self:end;width:min(430px,92vw)}.numstage[data-view="model"] .specimen{transform:translateY(-92%) scale(.5)}.numstage .specimen{align-self:start}
  .numstage[data-view="model"]{padding-bottom:30px}
  .scene{padding-inline:16px}.seg button{padding:0 14px}
}
@media (max-width:520px){
  .maps{grid-template-columns:1fr}.mapf canvas{max-height:30vh}.pcard{text-align:center}.hint{font-size:.75rem}
  .btn.huge{padding:0 26px}.foot .btn{padding:0 18px}.tilegrid{grid-template-columns:repeat(3,1fr)}
  .cbtn,.cand{grid-template-columns:minmax(64px,1fr) 1fr 46px;gap:8px;padding:8px 12px}
  .flow3{flex-wrap:wrap;justify-content:center}.frow{grid-template-columns:84px 1fr 46px}
}
@media (max-height:560px) and (orientation:landscape){.specimen{width:150px}.specimen.sm{width:110px}.giant{font-size:2.2rem}.dotfield{height:30vh}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}.scene{transform:none!important}}
@media (forced-colors:active){.chip[aria-pressed="true"],.btn[aria-pressed="true"]{outline:3px solid Highlight}}

/* ---- finish: depth, glass and light. Everything above stays the layout; this layer is the look. ---- */
:root,html[data-theme="dark"]{--glass:rgba(44,44,46,.52);--glass-hi:rgba(255,255,255,.09);--shadow:0 24px 60px -24px rgba(0,0,0,.7),0 2px 8px rgba(0,0,0,.3);--glow2:rgba(191,90,242,.13);--glow3:rgba(255,159,10,.07)}
html[data-theme="light"]{--glass:rgba(255,255,255,.66);--glass-hi:rgba(255,255,255,.9);--shadow:0 24px 50px -26px rgba(20,30,60,.28),0 2px 6px rgba(20,30,60,.08);--glow2:rgba(142,63,196,.08);--glow3:rgba(199,106,0,.05)}
body{background:radial-gradient(70rem 40rem at 50% -14%,color-mix(in srgb,var(--accent) 22%,transparent),transparent 70%),radial-gradient(46rem 32rem at 100% 100%,var(--glow2),transparent 70%),radial-gradient(40rem 30rem at 0% 90%,var(--glow3),transparent 70%),var(--bg)}
.top{background:linear-gradient(var(--bg),color-mix(in srgb,var(--bg) 0%,transparent));-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.foot{background:linear-gradient(0deg,var(--bg) 40%,color-mix(in srgb,var(--bg) 0%,transparent))}
.prog__name{background:linear-gradient(90deg,var(--ink),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{background:var(--glass);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);box-shadow:inset 0 1px 0 var(--glass-hi)}
.btn.primary{background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 84%,#fff),var(--accent));border-color:color-mix(in srgb,var(--accent) 70%,#000);box-shadow:inset 0 1px 0 rgba(255,255,255,.35),0 10px 26px -10px var(--accent)}
.btn.primary:hover{filter:none;transform:translateY(-1px);box-shadow:inset 0 1px 0 rgba(255,255,255,.4),0 14px 30px -10px var(--accent)}
.ibtn.sm{background:var(--glass);box-shadow:inset 0 1px 0 var(--glass-hi)}
.giant,.big{background:linear-gradient(180deg,var(--ink) 55%,color-mix(in srgb,var(--ink) 72%,var(--accent)));-webkit-background-clip:text;background-clip:text;color:transparent;padding-bottom:.06em}
.alarm .big{background:none;color:var(--warn)}.verdict .bad{background:none}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:color-mix(in srgb,var(--accent) 12%,transparent);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent)}
.dataset,.probe,.plot,.train__model,.opt,details,.ask,.chip,.sysbtn,.node,.pipe li,.cbtn,.runs li,.tscroll{background:var(--glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow)}
.node,.pipe li{box-shadow:inset 0 1px 0 var(--glass-hi)}
.chip,.sysbtn,.cbtn{transition:transform .18s cubic-bezier(.2,.8,.2,1),border-color .18s,box-shadow .18s}.chip:hover,.sysbtn:hover,.cbtn:hover{transform:translateY(-2px)}
.chip[aria-pressed="true"]{background:color-mix(in srgb,var(--accent) 14%,var(--glass))}
.specimen{position:relative;border-radius:30px;padding:0;box-shadow:var(--shadow),0 0 0 1px var(--line);filter:none;background:var(--panel)}
.specimen .creature{border-radius:30px}
.tile{box-shadow:inset 0 1px 0 var(--glass-hi),0 8px 22px -14px rgba(0,0,0,.6)}.tile.sel{box-shadow:0 0 0 2px var(--accent),0 10px 26px -10px var(--accent)}
.tile:hover:not(.sel):is(button){transform:translateY(-2px)}.tile{transition:transform .18s cubic-bezier(.2,.8,.2,1)}
@keyframes rise{from{opacity:0;transform:translateY(18px) scale(.97)}}
.reveal{background:var(--glass);border-radius:0 16px 16px 0;padding:12px 18px;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}
.center .reveal{border-radius:18px;padding:14px 22px;border:1px solid color-mix(in srgb,var(--accent) 35%,transparent)}
.stepper li{background:var(--glass)}.stepper li[aria-current]{background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 84%,#fff),var(--accent))}
.seg{background:var(--glass);box-shadow:inset 0 1px 0 var(--glass-hi)}.seg button[aria-pressed="true"],.seg button[aria-selected="true"]{box-shadow:0 4px 12px -4px rgba(0,0,0,.5)}
.cb i,.ibar i,.bpair .a,.fbar i{background:linear-gradient(90deg,var(--accent),color-mix(in srgb,var(--accent) 60%,var(--velite)))}
.irow.hot .ibar i{background:linear-gradient(90deg,var(--accent),var(--velite))}.ibar i{background:linear-gradient(90deg,color-mix(in srgb,var(--mute) 70%,transparent),var(--mute))}
.train__model{border:0;box-shadow:0 0 0 2px var(--accent),0 0 40px -8px var(--accent),inset 0 1px 0 var(--glass-hi)}
.bigpct .num{background:linear-gradient(180deg,var(--ink),color-mix(in srgb,var(--ink) 60%,var(--accent)));-webkit-background-clip:text;background-clip:text;color:transparent}
.gauge svg circle:nth-child(2){filter:drop-shadow(0 0 6px currentColor)}
#cv,.mapf canvas,.plot{box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow)}
.node.on{background:color-mix(in srgb,var(--accent) 10%,var(--glass));box-shadow:0 12px 30px -14px var(--accent),inset 0 1px 0 var(--glass-hi)}
.stack b{background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 84%,#fff),var(--accent))}
.caret{box-shadow:0 0 12px var(--accent)}
.prompt.a{background:linear-gradient(90deg,var(--accent),var(--velite));-webkit-background-clip:text;background-clip:text;color:transparent}
.bigsign{background:linear-gradient(90deg,var(--warn),var(--nora));-webkit-background-clip:text;background-clip:text;color:transparent}
.closing p:nth-child(1){color:var(--accent)}.closing p:nth-child(2){color:var(--velite)}.closing p:nth-child(3){color:var(--nora)}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){.dataset,.probe,.plot,.opt,details,.ask,.chip,.sysbtn,.node,.pipe li,.cbtn,.runs li,.btn,.reveal{background:var(--panel)}}
@media (prefers-reduced-transparency:reduce){.dataset,.probe,.plot,.opt,details,.ask,.chip,.sysbtn,.node,.pipe li,.cbtn,.runs li,.btn,.reveal,.top{background:var(--panel);-webkit-backdrop-filter:none;backdrop-filter:none}}

/* ---- photographs: real pictures in rounded frames, with overlays that show what a system is doing ---- */
.photo{position:relative;margin:0;overflow:hidden;border-radius:26px;background:var(--panel2);box-shadow:var(--shadow),0 0 0 1px var(--line);isolation:isolate}
.photo>.ph{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:cover;user-select:none}
.photo figcaption{position:absolute;left:0;right:0;bottom:0;padding:26px 16px 12px;font-size:.78rem;font-weight:600;color:#fff;text-align:left;background:linear-gradient(transparent,rgba(0,0,0,.72));z-index:3}
.photo.op{width:min(560px,88vw);aspect-ratio:16/10;animation:rise .8s cubic-bezier(.2,.8,.2,1) both}
.photo.op .ph{animation:kb 9s ease-out both}
@keyframes kb{from{transform:scale(1.12)}to{transform:scale(1)}}
.ov{position:absolute;inset:0;z-index:2;pointer-events:none;color:#fff;font-weight:700}
.ov .tag{position:absolute;top:14px;left:14px;padding:6px 12px;border-radius:999px;font-size:.78rem;letter-spacing:.02em;background:var(--accent);box-shadow:0 6px 20px -6px var(--accent);animation:pop .5s .6s both}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.9)}}
.ov-stream .scan{position:absolute;left:22%;top:12%;width:56%;height:46%;border:3px solid var(--accent);border-radius:10px;box-shadow:0 0 0 999px rgba(0,0,0,.28),0 0 24px var(--accent);animation:scan 3.2s .5s cubic-bezier(.6,0,.3,1) both}
@keyframes scan{0%{opacity:0;transform:translate(-30%,10%) scale(.6)}30%{opacity:1}100%{transform:none}}
.ov-stream .match{position:absolute;right:14px;bottom:14px;padding:6px 12px;border-radius:10px;font-size:.82rem;background:rgba(0,0,0,.6);color:var(--good);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);animation:pop .5s 2.4s both}
.ov-face svg{position:absolute;inset:0;width:100%;height:100%}
.ov-face .br{fill:none;stroke:var(--accent);stroke-width:1.2;stroke-linecap:round;vector-effect:non-scaling-stroke;animation:pop .5s .3s both;filter:drop-shadow(0 0 4px var(--accent))}
.ov-face .mesh{stroke:#fff;stroke-width:1.2;fill:#fff;vector-effect:non-scaling-stroke;opacity:.9;stroke-dasharray:120;stroke-dashoffset:120;animation:draw 1.8s .8s ease-out forwards}
.ov-face .mesh path{fill:none;vector-effect:non-scaling-stroke}
@keyframes draw{to{stroke-dashoffset:0}}
.ov-face .tag{top:auto;bottom:14px;left:50%;transform:translateX(-50%);animation:none;background:var(--good);box-shadow:0 6px 20px -6px var(--good)}
.ov-music .card{position:absolute;left:14px;right:14px;bottom:14px;display:flex;gap:12px;align-items:center;padding:12px 14px;border-radius:16px;background:rgba(20,20,22,.62);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);animation:pop .6s .5s both;text-align:left}
.ov-music b{display:block;font-size:.95rem}.ov-music small{display:block;font-weight:500;font-size:.76rem;opacity:.8}
.eq{display:flex;gap:3px;align-items:flex-end;height:26px;width:28px;flex:none}.eq i{flex:1;border-radius:2px;background:linear-gradient(var(--velite),var(--accent));animation:eq 1s ease-in-out infinite alternate}.eq i:nth-child(2){animation-delay:-.3s}.eq i:nth-child(3){animation-delay:-.6s}.eq i:nth-child(4){animation-delay:-.15s}
@keyframes eq{from{height:20%}to{height:100%}}
.ov-chat{display:flex;flex-direction:column;justify-content:center;gap:12px;padding:0 22px;background:linear-gradient(90deg,rgba(0,0,0,.42),rgba(0,0,0,.08) 50%,rgba(0,0,0,.42))}
.bub{max-width:70%;padding:12px 16px;border-radius:20px;font-size:1rem;font-weight:600;box-shadow:0 8px 24px -8px rgba(0,0,0,.6)}
.bub.you{align-self:flex-end;background:var(--accent);border-bottom-right-radius:6px;animation:pop .5s .4s both}
.bub.bot{align-self:flex-start;background:rgba(30,30,32,.8);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom-left-radius:6px;animation:pop .5s 1.1s both}
.dots{display:inline-flex;gap:5px}.dots i{width:8px;height:8px;border-radius:50%;background:#fff;animation:dot 1.2s infinite}.dots i:nth-child(2){animation-delay:.2s}.dots i:nth-child(3){animation-delay:.4s}
@keyframes dot{0%,60%,100%{opacity:.3;transform:none}30%{opacity:1;transform:translateY(-4px)}}
.mosaic{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;width:min(520px,90vw)}
.mosaic .ph{width:100%;aspect-ratio:1;object-fit:cover;border-radius:16px;box-shadow:var(--shadow);animation:rise .6s both}
.mosaic .ph:nth-child(2){animation-delay:.08s}.mosaic .ph:nth-child(3){animation-delay:.16s}.mosaic .ph:nth-child(4){animation-delay:.24s}

/* 01: the robot photo, then the same frame breaking apart to show the machines underneath */
.photo.robo{width:min(380px,74vw);aspect-ratio:4/3;box-shadow:var(--shadow),0 0 60px -10px color-mix(in srgb,var(--accent) 45%,transparent)}
.apartstage{width:min(520px,88vw);aspect-ratio:16/9;overflow:visible;background:none}
.apartstage .under{border-radius:26px;opacity:0;transform:scale(.94);transition:opacity 1s .35s,transform 1.2s .35s cubic-bezier(.2,.8,.2,1)}
.apartstage figcaption{border-radius:0 0 26px 26px;opacity:0;transition:opacity .6s 1.2s}
.apartstage.apart .under,.apartstage.apart figcaption{opacity:1;transform:none}
.shards{position:absolute;inset:0;display:grid;grid-template-columns:repeat(5,1fr);grid-template-rows:repeat(4,1fr);z-index:4;pointer-events:none}
.shards i{background:url(../img/robot.webp) no-repeat;background-size:500% 400%;background-position:calc(var(--x)*25%) calc(var(--y)*33.333%);transition:transform 1.1s cubic-bezier(.3,.7,.2,1),opacity 1s .15s;outline:1px solid rgba(0,0,0,.25)}
.apartstage.apart .shards i{transform:translate(var(--tx),var(--ty)) rotate(var(--r)) scale(.6);opacity:0}

/* 07: the wolf and husky study */
.realcase{display:flex;flex-direction:column;gap:12px;padding:16px;border-radius:22px;background:var(--glass);box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow);animation:swapin .6s both}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:10px}.pair .photo{aspect-ratio:4/3;border-radius:16px}.pair figcaption{font-size:.8rem;padding:20px 10px 8px}
.realcase .small{line-height:1.45}

/* 10, 11: the volcano behind the sentence */
.photo.banner{width:min(760px,100%);height:clamp(96px,19vh,190px);border-radius:24px}
.photo.banner.thin{height:clamp(70px,12vh,120px)}
.photo.banner .ph{animation:kb 14s ease-out both}
.photo.banner figcaption{padding:20px 14px 10px;font-size:.72rem}

/* 12: evidence */
.evid{display:grid;grid-template-columns:1fr 1fr;gap:14px;width:min(760px,100%);animation:swapin .6s both}
.evid .photo{aspect-ratio:4/3;border-radius:20px}.evid figcaption{font-size:.82rem;font-weight:500;line-height:1.4;padding:48px 14px 12px;background:linear-gradient(transparent,rgba(0,0,0,.86) 45%)}.evid figcaption b{font-weight:700}

/* 14: systems as photo cards */
.syspick{width:min(760px,100%)}
.sysbtn{flex-direction:column;align-items:stretch;gap:0;padding:0;overflow:hidden;min-height:0}
.sysbtn .ph{width:100%;aspect-ratio:16/8;object-fit:cover;transition:transform .5s cubic-bezier(.2,.8,.2,1)}
.sysbtn:hover .ph{transform:scale(1.05)}
.sysbtn>span{padding:14px 18px;font-size:1.05rem}
.photo.sysban{width:min(680px,100%);height:clamp(90px,16vh,150px);border-radius:20px}
.photo.sysban figcaption{font-size:.95rem;font-weight:700;padding:30px 16px 12px}

/* 15: the whole Earth */
.earthbg{position:fixed;left:50%;bottom:-78vmin;width:min(120vmin,1100px);aspect-ratio:1;transform:translateX(-50%);pointer-events:none;z-index:0;opacity:.28;transition:opacity 1.6s,transform 2s cubic-bezier(.2,.8,.2,1);-webkit-mask-image:radial-gradient(circle at 50% 50%,#000 44%,transparent 49%);mask-image:radial-gradient(circle at 50% 50%,#000 44%,transparent 49%)}
.earthbg .ph{width:100%;height:100%;object-fit:cover;border-radius:50%;animation:spin 240s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.scene.lit .earthbg{opacity:.5;transform:translateX(-50%) translateY(-10vmin)}
.fin{position:relative;z-index:1}

/* credits */
.credbox{flex:none}.credbox summary{font-size:.88rem}
#credList{max-height:34vh;overflow-y:auto;padding-bottom:8px}
.credits{list-style:none;padding:0;margin:0;display:grid;gap:10px;font-size:.78rem;line-height:1.4}
.credits li{display:flex;gap:10px;align-items:center}.credits img{width:52px;height:38px;object-fit:cover;border-radius:8px;flex:none}
.credits a{color:var(--accent);font-weight:600}

@media (max-width:860px){.photo.op{width:min(560px,92vw)}.pair figcaption{font-size:.72rem}}
@media (max-width:520px){.evid{grid-template-columns:1fr}.mosaic{gap:6px}.photo.op{aspect-ratio:4/3}.ov-chat .bub{font-size:.8rem}.earthbg{bottom:-60vmin}}
@media (max-height:560px) and (orientation:landscape){.photo.op{width:min(340px,50vw)}.photo.robo{width:240px}.apartstage{width:320px}}
@media (prefers-reduced-motion:reduce){.photo .ph,.earthbg .ph{animation:none!important}.ov-face .mesh{stroke-dashoffset:0}}
@media (forced-colors:active){.ov,.shards,.earthbg{display:none}}

/* ---- getting around: the scene rail, the chapters menu, key ideas, chapter banners, the recap ---- */
.prog__n{border:0;background:none;color:var(--mute);font:inherit;letter-spacing:.06em;font-variant-numeric:tabular-nums;min-height:40px;padding:0 8px;border-radius:10px;cursor:pointer}.prog__n:hover{color:var(--ink);background:var(--panel)}
.prog__ch{color:var(--mute);font-weight:600;letter-spacing:.02em;white-space:nowrap;font-size:.76rem;min-width:13ch}
.rail{display:flex;align-items:center}
.rail__s{position:relative;width:11px;height:28px;padding:0;border:0;background:none;cursor:pointer}
.rail__s::before{content:"";position:absolute;left:2px;right:2px;top:12px;height:4px;border-radius:2px;background:var(--line);transition:background .3s,transform .3s}
.rail__s.gap{margin-left:7px}
.rail__s.seen::before{background:color-mix(in srgb,var(--accent) 55%,var(--line))}
.rail__s.now::before{background:linear-gradient(90deg,var(--accent),var(--velite));transform:scaleY(1.9);box-shadow:0 0 10px var(--accent)}
.rail__s:hover::before{background:var(--ink)}
.rail__s:focus-visible{outline-offset:0}
.chapters{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));grid-auto-rows:max-content;align-content:start;gap:12px;overflow-y:auto;min-height:0;padding:2px}
.chap{display:flex;flex-direction:column;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:var(--panel2)}
.chap.here{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}
.chap__art{height:76px;overflow:hidden;background:var(--panel);display:grid;place-items:center}
.chap__art img,.chap__art svg{width:100%;height:100%;object-fit:cover;display:block}
.chap__art:has(.creature){display:flex;justify-content:center;gap:0}.chap__art .creature{width:auto;height:150%;flex:none;margin:-8% -4% 0}
.chap__body{padding:10px 8px 8px}.chap h3{font-size:1rem;padding:0 8px 4px}.chap h3 small{display:block;font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:700}
.chap ol{list-style:none;padding:0;margin:0}
.menu__item{min-height:40px;gap:10px;font-size:.9rem}.menu__item .tick{margin-left:auto;color:var(--good);font-weight:700}
.menu__item[aria-current]{background:color-mix(in srgb,var(--accent) 14%,transparent)}
.menu__head{display:flex;flex-direction:column;gap:2px}
.keys{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:.78rem;color:var(--mute)}.keys kbd{display:inline-block;min-width:22px;padding:2px 6px;margin-right:4px;border-radius:6px;border:1px solid var(--line);font:600 .72rem/1.4 inherit;text-align:center;color:var(--ink);background:var(--panel2)}
.ideas{margin:0;display:grid;grid-auto-rows:max-content;gap:8px;overflow-y:auto;min-height:0}
.idea{padding:10px 14px;border-radius:14px;background:var(--panel2)}.idea dt{font-weight:700}.idea dd{margin:2px 0 0;color:var(--mute);font-size:.9rem;line-height:1.4}.idea .link{min-height:32px;padding:0;font-size:.82rem}
.idea.later dt::after{content:"coming up";margin-left:8px;font-size:.66rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--mute);border:1px solid var(--line);border-radius:999px;padding:1px 7px;vertical-align:2px}
.chtoast{position:fixed;left:50%;top:70px;z-index:30;display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px 26px;border-radius:18px;background:var(--glass);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow);border:1px solid color-mix(in srgb,var(--accent) 40%,transparent);transform:translate(-50%,-14px);opacity:0;pointer-events:none;transition:opacity .4s,transform .5s cubic-bezier(.2,.8,.2,1)}
.chtoast.on{opacity:1;transform:translate(-50%,0)}
.chtoast small{font-size:.68rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}.chtoast b{font-size:1.15rem;letter-spacing:-.01em}
.recap{width:min(620px,100%);padding:18px 20px;border-radius:22px;background:var(--glass);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);box-shadow:inset 0 1px 0 var(--glass-hi),var(--shadow);text-align:left;display:flex;flex-direction:column;gap:10px;animation:swapin .6s both}
.recap ol{list-style:none;padding:0;margin:0;display:grid;gap:8px}.recap li{display:grid;grid-template-columns:34px 1fr;gap:10px;align-items:baseline;line-height:1.4}.recap .num{font-weight:700;color:var(--accent);font-size:.8rem}
@media (max-width:1060px){.prog__ch{display:none}}
@media (max-width:520px){.prog__name{display:none}.rail__s{width:8px}.rail__s.gap{margin-left:4px}.chapters{grid-template-columns:1fr}.chap__art{height:56px}}
@media (max-width:400px){.rail{display:none}}
@media (prefers-reduced-transparency:reduce){.chtoast,.recap{background:var(--panel);-webkit-backdrop-filter:none;backdrop-filter:none}}