/* AgentTide 3D site. Same "Thames at night" palette as the demo app: near-black navy, cyan primary, sodium-lamp amber secondary,
   seafoam for the intelligence steps. The page is one full-window 3D stage with glass panels floating over it. */
:root{
  --bg:#04060c; --tx:#f3f6fd; --tx-2:#b5bfd6; --tx-3:#7c88a5;
  --line:rgba(255,255,255,.1); --line-2:rgba(255,255,255,.18);
  --accent:#2fd9f2; --amber:#ffb547; --ai:#5ee3c4; --vio:#9085e9;
  --grad:linear-gradient(120deg,#2fd9f2 0%,#8fe3d6 48%,#ffc266 100%);
  --glass:linear-gradient(180deg,rgba(18,26,46,.78),rgba(8,12,24,.7));
  --font:"Inter Variable","Inter","Segoe UI Variable Display","Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,"Cascadia Code","SF Mono",Consolas,monospace;
  --pad:clamp(16px,2.4vw,40px); --panel-w:min(460px,40vw);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%;margin:0}
body{background:var(--bg);color:var(--tx);font-family:var(--font);font-size:15px;line-height:1.55;overflow:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overscroll-behavior:none}
h1,h2,h3,p,ul{margin:0}
button{font:inherit;color:inherit;cursor:pointer}
a{color:var(--accent);text-decoration:none}
svg{display:block}
::selection{background:rgba(47,217,242,.3)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:10px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- stage ---------- */
#stage{position:fixed;inset:0;z-index:0;background:radial-gradient(1100px 650px at 72% -10%,#0d1b2c 0%,transparent 60%),radial-gradient(900px 600px at 10% 110%,#150f33 0%,transparent 60%),var(--bg);touch-action:none}
#stage canvas{display:block;width:100%;height:100%;cursor:grab;outline:none}
#labels{position:absolute;inset:0;pointer-events:none;overflow:hidden;z-index:1}
.lbl{pointer-events:auto;display:inline-flex;align-items:center;gap:8px;padding:5px 12px 5px 5px;border-radius:999px;border:1px solid var(--line-2);background:rgba(6,10,20,.72);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);color:var(--tx);font-size:13px;font-weight:600;white-space:nowrap;transition:opacity .35s,border-color .25s,background .25s;cursor:pointer}
.lbl i{display:grid;place-items:center;min-width:22px;height:22px;padding:0 4px;border-radius:999px;background:var(--c);color:#04101a;font:700 12px/1 var(--font);font-style:normal;transition:transform .25s}
.lbl:hover,.lbl.on,.lbl:focus-visible{border-color:var(--c,#fff);background:rgba(14,22,40,.9)}
.lbl:hover i,.lbl.on i{transform:scale(1.18)}
.lbl.dim{opacity:.28}
.chip{padding:3px 11px;border-radius:999px;border:1px solid rgba(255,181,71,.5);background:rgba(6,10,20,.7);color:#ffd9a0;font-size:11px;letter-spacing:.12em;text-transform:uppercase;white-space:nowrap;pointer-events:none}

/* ---------- header ---------- */
#top{position:fixed;left:0;right:0;top:0;z-index:10;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px;padding:14px var(--pad);pointer-events:none;background:linear-gradient(180deg,rgba(4,6,12,.85),transparent)}
#top>*{pointer-events:auto}
.brand img{display:block;height:34px;width:auto}
.brand .mark{display:none}
.card-logo{display:block;height:30px;width:auto;margin:0 0 18px}
.p-brand{margin-top:22px}
.p-brand img{display:block;height:22px;width:auto;opacity:.9}
.st-logo{display:block;height:30px;width:auto}
.st-tag{font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--tx-3);font-weight:600;padding-left:14px;border-left:1px solid var(--line-2)}
#sections{display:flex;align-items:stretch;justify-self:center;border-radius:999px;border:1px solid var(--line-2);background:rgba(10,16,30,.66);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);overflow:hidden}
#sections button{display:flex;align-items:center;justify-content:center;border:0;background:none;color:var(--tx-2);transition:background .2s,color .2s}
#sections button:hover{background:rgba(255,255,255,.09);color:#fff}
#sections .sb{width:44px}
#sections svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
#sections .cur{gap:10px;padding:8px 14px;min-width:240px;justify-content:space-between;border-left:1px solid var(--line);border-right:1px solid var(--line)}
#sections .cur small{font-size:10.5px;letter-spacing:.14em;color:var(--tx-3);font-variant-numeric:tabular-nums}
#sections .cur b{flex:1;text-align:left;font-size:14.5px;color:var(--tx);white-space:nowrap}
.acts{display:flex;gap:8px;justify-self:end}
.btn{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:999px;border:1px solid var(--line-2);background:rgba(255,255,255,.07);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);font-weight:600;font-size:13.5px;white-space:nowrap;transition:background .2s,transform .2s,border-color .2s}
.btn:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.3)}
.btn:active{transform:scale(.97)}
.btn svg{width:15px;height:15px;fill:currentColor}
.btn.ghost{background:none}
.btn.primary{background:var(--grad);color:#04101a;border-color:transparent}
.btn.primary:hover{filter:brightness(1.08)}
.btn.sm{padding:6px 13px;font-size:12.5px}

/* ---------- dock: the units of this section ---------- */
#dock{position:fixed;z-index:10;left:50%;bottom:14px;transform:translateX(-50%);display:flex;gap:10px;max-width:calc(100vw - 24px)}
#dock .g{display:flex;flex-direction:column;gap:3px;padding:6px 8px 7px;border-radius:18px;border:1px solid var(--line);background:rgba(10,16,30,.66);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);min-width:0}
#dock em{font-style:normal;font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--tx-3);padding-left:6px;white-space:nowrap}
#dock .g:first-child:not(:last-child) em{color:#ffc266}#dock .g:last-child:not(:first-child) em{color:var(--ai)}
#dock .pills{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
#dock .pills::-webkit-scrollbar{display:none}
#dock button{display:flex;align-items:center;gap:7px;padding:5px 11px 5px 5px;border-radius:999px;border:1px solid transparent;background:none;color:var(--tx-2);font-size:13px;font-weight:600;white-space:nowrap;transition:background .2s,color .2s,border-color .2s}
#dock button i{display:grid;place-items:center;min-width:21px;height:21px;padding:0 4px;border-radius:999px;background:var(--c);color:#04101a;font:700 11.5px/1 var(--font);font-style:normal}
#dock button:hover,#dock button.on{background:rgba(255,255,255,.09);color:#fff;border-color:var(--line-2)}
#dock button.on{border-color:var(--c)}
#dock.many button{font-size:12px;padding-right:9px}

/* ---------- intro / section card ---------- */
#intro{position:fixed;z-index:8;left:var(--pad);bottom:clamp(96px,16vh,150px);width:min(540px,42vw);pointer-events:none;transition:opacity .6s,transform .6s}
#intro>*{pointer-events:auto}
#intro.gone{opacity:0;transform:translateY(16px);pointer-events:none}
#intro.gone>*{pointer-events:none}
.eyebrow{font-size:11.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);font-weight:600;margin-bottom:12px}
#intro h1{font-size:clamp(34px,4.4vw,68px);line-height:1;letter-spacing:-.035em;font-weight:680}
#intro h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{margin:16px 0 22px;font-size:clamp(14.5px,1.2vw,17px);color:var(--tx-2);max-width:46ch}
.lede b{color:var(--tx);font-weight:600}
#intro .row{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- the story ---------- */
.btn.story{background:var(--grad);color:#04101a;border-color:transparent}
.btn.story:hover{filter:brightness(1.08)}
#story{position:fixed;inset:0;z-index:16;pointer-events:none}
#story>*{pointer-events:auto}
.st-bar{position:absolute;left:0;right:0;top:0;padding:12px var(--pad) 18px;background:linear-gradient(180deg,rgba(4,6,12,.92),transparent)}
.st-top{display:flex;align-items:center;gap:14px;margin-bottom:10px}
.st-brand{display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--tx-2)}
.st-brand img{height:26px;width:auto}
.st-brand b{font-weight:600}
.st-top small{flex:1;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--tx-3)}
.st-top .btn svg{fill:none}
.st-seg{display:grid;grid-template-columns:repeat(15,1fr);gap:4px}
.st-seg button{position:relative;height:8px;padding:0;border:0;border-radius:4px;background:rgba(255,255,255,.16);overflow:hidden;cursor:pointer}
.st-seg button i{position:absolute;inset:0;transform-origin:left;transform:scaleX(var(--p,0));background:var(--grad);transition:transform .6s}
.st-seg button.on{box-shadow:0 0 0 1px rgba(255,255,255,.5)}
.st-seg button:hover{background:rgba(255,255,255,.3)}
.st-cap{position:absolute;right:16px;bottom:16px;width:min(380px,34vw);display:flex;flex-direction:column;align-items:stretch;gap:12px;padding:16px 18px 14px;border-radius:22px;border:1px solid var(--line-2);background:var(--glass);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px);box-shadow:0 30px 70px -36px #000}
.st-txt{min-width:0;flex:1}
.st-txt small{font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);font-weight:600}
.st-txt h2{margin:2px 0 6px;font-size:19px;letter-spacing:-.02em}
.st-txt p{font-size:14px;line-height:1.5;color:var(--tx);min-height:4.5em}
.st-txt p.in{animation:stin .6s ease both}
@keyframes stin{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
#st-look{display:flex;align-items:flex-start;gap:8px;margin-top:6px;font-size:12px;line-height:1.35;color:var(--tx-2);min-height:1.4em}
#st-look i{flex:none;margin-top:.3em}
#st-look i{width:9px;height:9px;border-radius:50%;box-shadow:0 0 10px currentColor}
#st-look em{font-style:normal;color:var(--tx-3)}
.st-ctl{display:flex;align-items:center;justify-content:space-between;gap:6px;flex:none;padding-top:10px;border-top:1px solid var(--line)}
.st-ctl .ic{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;border:1px solid var(--line-2);background:rgba(255,255,255,.07);transition:background .2s,transform .2s}
.st-ctl .ic:hover{background:rgba(255,255,255,.16)}
.st-ctl .ic:active{transform:scale(.94)}
.st-ctl .ic.big{width:44px;height:44px;background:var(--grad);color:#04101a;border-color:transparent}
.st-ctl .ic.on{border-color:var(--accent);color:var(--accent)}
.st-ctl svg{width:15px;height:15px}
.st-ctl .big svg{width:19px;height:19px}
body.story #top,body.story #dock,body.story #hint,body.story #intro,body.story #panel,body.story #tourbar,body.story #tip{display:none!important}
body.story #ctrl:not(.show){display:none}
body.story #ctrl{top:76px;left:auto;right:var(--pad)}
body.story #labels .lbl{pointer-events:none}
body.story #labels{-webkit-mask-image:linear-gradient(180deg,transparent 52px,#000 84px);mask-image:linear-gradient(180deg,transparent 52px,#000 84px)}
#storyend{position:fixed;inset:0;z-index:18;display:grid;place-items:center;padding:16px;background:rgba(2,4,9,.55);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);animation:fade .6s}
#storyend .card{width:min(720px,100%);text-align:left}
#storyend h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
#storyend .fine{margin-top:18px;font-size:12px;color:var(--tx-3)}

/* ---------- scene controls and toast ---------- */
#ctrl{position:fixed;z-index:9;left:var(--pad);top:78px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;max-width:calc(100vw - 2 * var(--pad));padding:9px 16px;border-radius:999px;border:1px solid var(--line-2);background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
#ctrl label{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--tx-3);white-space:nowrap}
#ctrl b{min-width:5.5em;font:600 13px var(--mono);color:var(--tx)}
#ctrl input[type=range]{width:min(240px,30vw);accent-color:#2fd9f2;cursor:pointer}
#toast{position:fixed;z-index:25;left:50%;top:84px;transform:translate(-50%,-14px);max-width:min(560px,calc(100vw - 32px));padding:12px 18px;border-radius:18px;border:1px solid var(--line-2);background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);font-size:13.5px;color:var(--tx);opacity:0;pointer-events:none;transition:opacity .35s,transform .35s;box-shadow:0 24px 50px -20px #000}
#toast.on{opacity:1;transform:translate(-50%,0)}
#toast b{color:var(--c,#2fd9f2)}

/* ---------- hint, tooltip ---------- */
#hint{position:fixed;z-index:6;left:50%;transform:translateX(-50%);bottom:78px;display:flex;gap:4px 18px;flex-wrap:wrap;justify-content:center;width:max-content;max-width:calc(100vw - 32px);font-size:11.5px;color:var(--tx-3);pointer-events:none;transition:opacity .4s}
#hint b{color:var(--tx-2);font-weight:600}
body.panel #hint{opacity:0}
#tip{position:fixed;z-index:20;left:0;top:0;width:min(300px,80vw);padding:14px 16px;border-radius:18px;border:1px solid var(--line-2);background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);box-shadow:0 24px 50px -20px #000;pointer-events:none}
#tip .k{display:flex;align-items:center;gap:8px;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--c)}
#tip .k i{width:8px;height:8px;border-radius:50%;background:var(--c);box-shadow:0 0 10px var(--c)}
#tip b.n{display:block;margin:5px 0 2px;font-size:17px;letter-spacing:-.01em}
#tip p{font-size:13px;color:var(--tx-2);line-height:1.45}
#tip .s{display:flex;justify-content:space-between;gap:10px;margin-top:10px;padding-top:9px;border-top:1px solid var(--line);font-size:12px;color:var(--tx-3)}
#tip .s b{font:600 12.5px var(--mono);color:var(--tx)}
#tip .go{margin-top:9px;font-size:11.5px;color:var(--c)}
#tip .rec{margin-top:8px;font-size:11.5px;color:var(--tx-3);line-height:1.4}

/* ---------- detail panel ---------- */
#panel{position:fixed;z-index:12;right:14px;top:78px;bottom:14px;width:var(--panel-w);padding:22px 22px 18px;border-radius:26px;border:1px solid var(--line-2);background:var(--glass);backdrop-filter:blur(24px) saturate(140%);-webkit-backdrop-filter:blur(24px) saturate(140%);box-shadow:0 40px 90px -40px #000,inset 0 1px 0 rgba(255,255,255,.07);overflow-y:auto;transform:translateX(calc(100% + 30px));opacity:0;visibility:hidden;transition:transform .6s cubic-bezier(.2,.8,.2,1),opacity .4s,visibility 0s .6s;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,.2) transparent}
#panel.on{transform:none;opacity:1;visibility:visible;transition:transform .6s cubic-bezier(.2,.8,.2,1),opacity .4s,visibility 0s}
.p-top{display:flex;justify-content:space-between;align-items:center;gap:10px}
.p-k{display:flex;align-items:center;gap:9px;font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--c);font-weight:600}
.p-k i{display:grid;place-items:center;min-width:22px;height:22px;padding:0 4px;border-radius:999px;background:var(--c);color:#04101a;font:700 12px/1 var(--font);font-style:normal}
.p-x{display:grid;place-items:center;width:34px;height:34px;flex:none;border-radius:50%;border:1px solid var(--line-2);background:rgba(255,255,255,.06)}
.p-x:hover,.card .x:hover{background:rgba(255,255,255,.14)}
.p-x svg,.card .x svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
#panel h2{margin-top:14px;font-size:clamp(28px,2.8vw,40px);line-height:1.05;letter-spacing:-.03em;font-weight:680}
.p-tag{margin-top:6px;color:var(--c);font-weight:600;font-size:14.5px}
.p-sum{margin-top:14px;color:var(--tx-2);font-size:14px}
#panel h3{margin:22px 0 10px;font-size:11px;letter-spacing:.15em;text-transform:uppercase;color:var(--tx-3);font-weight:600}
#panel h3 span{text-transform:none;letter-spacing:0;font-weight:400;margin-left:6px;color:var(--tx-3)}
.p-card{margin-top:16px;padding:16px;border-radius:18px;border:1px solid var(--c);background:linear-gradient(160deg,rgba(255,255,255,.08),rgba(255,255,255,.02));animation:pop .45s cubic-bezier(.2,.8,.2,1)}
.p-card h4{margin:0;font-size:18px;letter-spacing:-.015em}
.p-card em{display:block;margin:2px 0 8px;font-style:normal;font-size:12.5px;color:var(--c);font-weight:600}
.p-card p{font-size:13.5px;color:var(--tx-2)}
.p-card p.rec{margin-top:10px;padding:8px 10px;border-radius:12px;background:rgba(255,255,255,.05);font-size:12.5px;color:var(--tx-2)}
.p-card p.rec b{display:block;font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--c);margin-bottom:2px}
.p-card .s{display:flex;justify-content:space-between;margin-top:12px;padding-top:10px;border-top:1px solid var(--line);font-size:12.5px;color:var(--tx-3)}
.p-card .s b{font:600 13px var(--mono);color:var(--tx)}
.p-parts{display:grid;gap:6px}
.pp{display:flex;align-items:center;gap:12px;width:100%;text-align:left;padding:10px 12px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.03);transition:background .2s,border-color .2s,transform .2s}
.pp i{flex:none;width:9px;height:9px;border-radius:50%;background:var(--c);box-shadow:0 0 10px var(--c)}
.pp b{display:block;font-size:14px}
.pp em{display:block;font-style:normal;font-size:12px;color:var(--tx-3)}
.pp:hover,.pp.on{background:rgba(255,255,255,.09);border-color:var(--c);transform:translateX(3px)}
.p-pts{margin-top:4px;padding:0;list-style:none;display:grid;gap:8px}
.p-pts li{position:relative;padding-left:20px;font-size:13.5px;color:var(--tx-2)}
.p-pts li::before{content:"";position:absolute;left:2px;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--c);opacity:.85}
.p-nav{display:flex;gap:8px;margin-top:22px}
.p-nav .btn{flex:1;justify-content:center;min-width:0}
.p-nav .btn span{overflow:hidden;text-overflow:ellipsis}
.p-note{margin-top:14px;font-size:11.5px;color:var(--tx-3)}
@keyframes pop{from{opacity:0;transform:translateY(8px) scale(.98)}to{opacity:1;transform:none}}

/* ---------- tour bar ---------- */
#tourbar{position:fixed;z-index:14;left:50%;bottom:84px;transform:translateX(-50%);display:flex;align-items:center;gap:18px;padding:10px 12px 10px 20px;border-radius:999px;border:1px solid var(--line-2);background:var(--glass);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}
#tourbar small{display:block;font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}
#tourbar b{font-size:15px}
#tourbar .dots{display:flex;gap:6px}
#tourbar .dots i{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.2);transition:background .3s,transform .3s}
#tourbar .dots i.on{background:var(--c);transform:scale(1.35)}
#tourbar.done .dots{display:none}
#tourbar.done .btn{background:var(--grad);color:#04101a;border-color:transparent}
body.panel:not(.mob) #tourbar{left:calc((100% - var(--panel-w)) / 2)}

/* ---------- menu and about sheet ---------- */
#sheet,#menu{position:fixed;inset:0;z-index:40;display:grid;place-items:center;padding:16px;background:rgba(2,4,9,.72);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);animation:fade .3s}
#menu{z-index:41}
.card{position:relative;width:min(860px,100%);max-height:calc(100vh - 32px);overflow:auto;padding:28px;border-radius:28px;border:1px solid var(--line-2);background:linear-gradient(180deg,rgba(20,28,50,.96),rgba(8,12,24,.96));box-shadow:0 50px 120px -40px #000;animation:pop .4s cubic-bezier(.2,.8,.2,1)}
#menu .card{width:min(1040px,100%)}
.card .x{position:absolute;right:16px;top:16px;display:grid;place-items:center;width:36px;height:36px;border-radius:50%;border:1px solid var(--line-2);background:rgba(255,255,255,.06)}
.tabs{display:flex;gap:6px;margin-right:48px;margin-bottom:22px;flex-wrap:wrap}
.tabs button{padding:8px 16px;border-radius:999px;border:1px solid var(--line);background:none;color:var(--tx-2);font-weight:600;font-size:13.5px}
.tabs button[aria-selected=true]{background:rgba(47,217,242,.14);border-color:var(--accent);color:#fff}
.card h2{font-size:clamp(28px,3.4vw,44px);line-height:1.05;letter-spacing:-.03em;font-weight:680}
.card .sub{margin:8px 0 22px;color:var(--tx-2);font-size:16px}
.card h3{margin:22px 0 10px;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--tx-3);font-weight:600}
.card .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:10px}
.card .cell{display:block;text-align:left;padding:16px;border-radius:20px;border:1px solid var(--line);background:rgba(255,255,255,.04)}
button.cell{transition:background .2s,border-color .2s,transform .2s}
button.cell:hover,button.cell.on{background:rgba(255,255,255,.09);border-color:var(--accent);transform:translateY(-2px)}
.card .cell b{display:block;font-size:16px;margin-bottom:5px}
.card .cell p{font-size:13px;color:var(--tx-2);line-height:1.45}
.card .cell .l{display:grid;place-items:center;width:30px;height:30px;margin-bottom:11px;border-radius:50%;background:var(--grad);color:#04101a;font-weight:700;font-size:13px}
.card .cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.card .mail{font-size:clamp(20px,2.6vw,30px);font-weight:640;letter-spacing:-.02em;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
@keyframes fade{from{opacity:0}to{opacity:1}}

/* ---------- section change veil, boot, fallback ---------- */
#veil{position:fixed;inset:0;z-index:30;background:var(--bg);opacity:0;pointer-events:none;transition:opacity .26s}
#veil.on{opacity:1;pointer-events:auto}
#boot{position:fixed;inset:0;z-index:60;display:grid;place-items:center;background:var(--bg);transition:opacity .35s,visibility 0s .35s}
#boot.done{opacity:0;visibility:hidden}
#boot div{text-align:center;color:var(--tx-3);font-size:13px;letter-spacing:.12em;text-transform:uppercase}
#boot i{display:block;width:44px;height:44px;margin:0 auto 14px;border-radius:50%;border:2px solid rgba(47,217,242,.2);border-top-color:var(--accent);animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
#fallback{position:fixed;inset:0;z-index:30;overflow:auto;padding:90px var(--pad) 40px;background:var(--bg)}
#fallback h1{font-size:clamp(32px,5vw,56px);letter-spacing:-.03em;max-width:18ch}
#fallback .note{margin:12px 0 26px;color:var(--tx-2);max-width:60ch}
#fallback .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
#fallback .cell{padding:20px;border-radius:22px;border:1px solid var(--line);background:rgba(255,255,255,.04)}
#fallback .cell h2{font-size:22px;margin:6px 0}
#fallback .cell ul{padding-left:18px;color:var(--tx-2);font-size:13.5px}

/* ---------- narrower screens ---------- */
@media (max-width:1180px){
  .acts .btn.story span{display:inline}
  #sections .cur{min-width:190px}
  .acts .btn:not(.primary) span{display:none}
  .acts .btn.ghost span{display:inline}
  .acts .btn:not(.primary):not(.ghost){padding:9px}
  #dock button span{display:none}
  #dock button{padding:5px}
  #dock button.on span{display:inline}
  #dock button.on{padding:5px 11px 5px 5px}
  #dock em{display:none}
}
@media (max-width:880px){
  #top{grid-template-columns:1fr auto;grid-template-areas:"brand acts" "sec sec";gap:8px;padding:10px 12px 8px}
  .brand{grid-area:brand}
  .acts{grid-area:acts}
  #sections{grid-area:sec;justify-self:stretch}
  .brand .full{display:block;height:24px}
  #sections .sb{width:36px}
  #sections .cur{flex:1;min-width:0;padding:7px 10px;gap:6px}
  #sections .cur small{display:none}
  #sections .cur b{font-size:13px}
  .acts .btn.ghost{display:none}
  #intro{left:14px;right:14px;width:auto;bottom:84px}
  .st-cap{width:auto;left:10px;right:10px;bottom:10px;gap:8px;padding:12px 14px 10px}
  .st-txt p{min-height:0;font-size:13.5px}
  .st-ctl{padding-top:8px}
  .st-seg{gap:2px}
  .st-top small{display:none}
  .acts .btn.story span{display:none}
  .acts .btn.story{padding:9px}
  #intro h1{font-size:clamp(34px,10.5vw,50px)}
  #hint{display:none}
  #ctrl{top:108px;border-radius:22px;padding:8px 12px;gap:8px}
  #toast{top:108px}
  #dock{bottom:10px;left:10px;right:10px;transform:none;max-width:none}
  #dock .g{flex:1;align-items:center}
  #dock.many .g{flex:1;min-width:0}
  #panel{left:8px;right:8px;top:auto;bottom:8px;width:auto;height:46vh;padding:16px 16px 14px;border-radius:24px}
  body.panel #dock{opacity:0;pointer-events:none}
  #tourbar{bottom:calc(46vh + 18px);max-width:calc(100vw - 20px);gap:12px;padding-left:14px}
  #tourbar .dots{display:none}
  .lbl{font-size:11.5px;padding-right:9px}
  .lbl span{display:none}
  .lbl.on span,.lbl:hover span{display:inline}
  .card{padding:20px 16px}
}
/* a phone on its side (any width): wide but only about 360 to 430 px tall, so the header is one row and the panel and the story card sit at the side (as on a desktop), which leaves the model most of the screen */
@media (orientation:landscape) and (max-height:520px){
  #hint{display:none}
  #top{grid-template-columns:auto minmax(0,1fr) auto;grid-template-areas:"brand sec acts";gap:10px;padding:8px 12px 6px}
  #sections{justify-self:center;width:100%;max-width:380px}
  #sections .sb{width:34px}
  #sections .cur{padding:5px 10px}
  .brand .full{height:22px}
  #intro{left:14px;right:auto;width:min(42vw,400px);bottom:62px}
  #intro h1{font-size:clamp(26px,9vh,42px)}
  #panel{left:auto;right:8px;top:56px;bottom:8px;width:min(380px,46vw);height:auto;padding:14px 16px 12px;border-radius:20px}
  #tourbar{bottom:62px;left:calc((100% - min(380px,46vw)) / 2)}
  .st-cap{left:auto;right:8px;bottom:8px;width:min(340px,42vw);padding:10px 14px 8px;gap:6px}
  #ctrl,#toast{top:58px}
}
@media (orientation:landscape) and (max-height:420px){   /* the shortest phones on their side: a smaller headline and one row of buttons, so the card fits under the header */
  #intro h1{font-size:clamp(24px,8.5vh,34px)}
  #intro .row .ghost{display:none}
}
@media (orientation:landscape) and (max-height:420px) and (max-width:720px){#intro .lede{display:none}}   /* and on the narrowest of them the card is a headline and two buttons */
@media (orientation:landscape) and (max-height:520px) and (min-width:881px){#intro{bottom:84px}}   /* a wide, short screen keeps the full-size dock, so the card sits a little higher */
/* on a touch screen the story's chapter bars get a taller touch area; the bar itself looks the same */
@media (pointer:coarse){
  .st-seg button{overflow:visible}
  .st-seg button i{border-radius:inherit}
  .st-seg button::after{content:'';position:absolute;inset:-9px 0}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important}
}