:root{
  --ink:#f3ede2; --ink-2:rgba(243,237,226,.72); --ink-3:rgba(243,237,226,.48);
  --bg:#0b0f12; --panel:rgba(14,18,21,.52); --line:rgba(243,237,226,.16);
  --brass:#e2c48f; --teal:#7ff3e4;
  --serif:"Instrument Serif", "Times New Roman", serif;
  --sans:Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color-scheme:dark;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}
body{overflow-x:hidden}
#gl{position:fixed;inset:0;width:100vw;height:100vh;height:100lvh;display:block;touch-action:pan-y;cursor:grab;outline:none}
#gl.drag{cursor:grabbing}
#track{position:relative;width:1px;pointer-events:none}
button{font:inherit;color:inherit}
a{color:inherit}

.scrim{position:fixed;inset:0;pointer-events:none;z-index:1;background:linear-gradient(90deg,rgba(7,9,11,.5),rgba(7,9,11,.18) 34%,transparent 58%)}
.grain{position:fixed;inset:-50%;pointer-events:none;z-index:2;opacity:.07;mix-blend-mode:overlay;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grain 1.2s steps(6) infinite}
@keyframes grain{0%{transform:translate(0,0)}25%{transform:translate(-3%,2%)}50%{transform:translate(2%,-3%)}75%{transform:translate(-2%,-1%)}100%{transform:translate(1%,3%)}}
@media (prefers-reduced-motion:reduce){.grain{animation:none}}

/* loader */
#loader{position:fixed;inset:0;z-index:50;display:grid;place-content:center;justify-items:center;gap:14px;background:var(--bg);transition:opacity .9s ease, visibility .9s}
#loader.done{opacity:0;visibility:hidden}
.ld-mark{color:var(--brass);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{50%{opacity:.4}}
.ld-title{font-family:var(--serif);font-size:34px;margin:0;letter-spacing:.01em}
.ld-title em{color:var(--ink-3)}
.ld-bar{width:min(260px,70vw);height:1px;background:var(--line);overflow:hidden}
.ld-bar i{display:block;height:100%;width:0;background:var(--brass);transition:width .3s ease}
.ld-txt{margin:0;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3)}

/* top bar */
.top{position:fixed;top:0;left:0;right:0;z-index:10;display:flex;justify-content:space-between;align-items:center;padding:18px 28px;pointer-events:none}
.top>*{pointer-events:auto}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:12px;letter-spacing:.24em}
.brand svg{color:var(--brass)}
.brand .sep{width:1px;height:12px;background:var(--line)}
.brand .sub{color:var(--ink-3);letter-spacing:.12em}
.tools{display:flex;align-items:center;gap:6px}
.tool{display:flex;align-items:center;gap:7px;border:0;background:transparent;padding:8px 10px;font-size:12px;color:var(--ink-2);cursor:pointer;border-radius:99px;transition:background .2s,color .2s}
.tool:hover{background:rgba(255,255,255,.07);color:var(--ink)}
.tool .dot{width:7px;height:7px;border-radius:2px;border:1px solid currentColor;transition:background .2s}
.tool[aria-pressed=true]{color:var(--ink)}
.tool[aria-pressed=true] .dot{background:var(--brass);border-color:var(--brass)}
.tool[disabled]{opacity:.35;cursor:not-allowed}
.book{border:0;background:var(--ink);color:#15130f;padding:10px 16px;border-radius:99px;font-size:12px;font-weight:600;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;transition:transform .2s, background .2s}
.book:hover{background:#fff;transform:translateY(-1px)}
.ghost{border:1px solid var(--line);padding:10px 16px;border-radius:99px;font-size:12px;text-decoration:none}

/* chapter rail */
.rail{position:fixed;left:28px;top:50%;transform:translateY(-50%);z-index:6;font-size:10px;letter-spacing:.14em;color:var(--ink-3)}
.rail ol{list-style:none;margin:0 0 14px;padding:0;display:grid;gap:7px}
.rail li button{display:block;width:14px;height:12px;border:0;background:transparent;padding:0;cursor:pointer;position:relative}
.rail li button::before{content:"";position:absolute;left:0;top:5px;height:1px;width:8px;background:var(--ink-3);transition:width .3s, background .3s}
.rail li.on button::before{width:14px;background:var(--brass)}
.rail li button:hover::before{width:14px;background:var(--ink)}
.rail-now{display:none}

/* story copy */
#story{position:fixed;inset:0;z-index:5;pointer-events:none}
.ch{position:absolute;left:clamp(64px,8vw,130px);top:50%;transform:translateY(-50%);max-width:min(560px,80vw);opacity:0;visibility:hidden}
.ch.vis{visibility:visible}
.ch .kick{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-2);margin:0 0 14px;display:flex;gap:10px;align-items:center}
.ch .kick b{color:var(--brass);font-weight:500}
.ch h1,.ch h2{font-family:var(--serif);font-weight:400;font-size:clamp(46px,6.6vw,104px);line-height:.92;margin:0;letter-spacing:-.01em;text-shadow:0 2px 30px rgba(0,0,0,.35)}
.ch h1 em,.ch h2 em{display:block;color:var(--ink-2)}
.ch .lede{max-width:390px;font-size:15px;line-height:1.55;color:var(--ink-2);margin:22px 0 0;text-shadow:0 1px 12px rgba(0,0,0,.5)}
.ch .stats{display:flex;gap:26px;margin:24px 0 0;padding:0;list-style:none}
.ch .stats li{font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}
.ch .stats b{display:block;font-family:var(--serif);font-size:30px;letter-spacing:0;text-transform:none;color:var(--ink);font-weight:400}
.ch .cta{display:flex;gap:10px;margin-top:26px;pointer-events:auto}
.note{position:absolute;right:clamp(28px,5vw,80px);top:38%;max-width:280px;opacity:0;visibility:hidden}
.note.vis{visibility:visible}
.note small{display:block;font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-3);margin-bottom:8px}
.note p{margin:0;font-family:var(--serif);font-size:24px;line-height:1.15;color:var(--ink);text-shadow:0 1px 18px rgba(0,0,0,.45)}
.scroll-cue{display:flex;align-items:center;gap:12px;margin-top:30px;font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3)}
.scroll-cue i{width:1px;height:38px;background:linear-gradient(var(--brass),transparent);animation:cue 2s ease-in-out infinite;transform-origin:top}
@keyframes cue{0%{transform:scaleY(0)}50%{transform:scaleY(1)}100%{transform:scaleY(1);opacity:0}}

/* annotations + room labels */
#tags{position:fixed;inset:0;z-index:4;pointer-events:none}
.tag{position:absolute;left:0;top:0;opacity:0;transition:opacity .35s;will-change:transform}
.tag .pin{position:absolute;left:-4px;top:-4px;width:8px;height:8px;border-radius:50%;background:var(--ink);box-shadow:0 0 0 4px rgba(243,237,226,.18)}
.tag .leader{position:absolute;left:0;top:0;height:1px;width:64px;background:var(--ink-2);transform-origin:0 0;transform:rotate(-28deg)}
.tag .lbl{position:absolute;left:56px;top:-46px;white-space:nowrap;font-size:11px;letter-spacing:.06em;color:var(--ink);padding-bottom:5px;border-bottom:1px solid var(--ink-2)}
.tag .lbl small{display:block;color:var(--ink-3);font-size:10px;letter-spacing:.12em;margin-top:2px}
.room{position:absolute;left:0;top:0;opacity:0;transform-origin:center;text-align:center;transition:opacity .4s;white-space:nowrap}
.room b{display:block;font-family:var(--serif);font-weight:400;font-size:17px;color:#fff;text-shadow:0 1px 8px rgba(0,0,0,.7)}
.room span{display:inline-block;font-size:9.5px;letter-spacing:.1em;color:#fff;background:rgba(10,12,14,.55);padding:3px 6px;border-radius:3px;margin-top:3px;backdrop-filter:blur(4px)}

/* readout */
.readout{position:fixed;left:28px;bottom:24px;z-index:6;display:grid;gap:3px;font-size:10px;letter-spacing:.08em;color:var(--ink-3);font-variant-numeric:tabular-nums}
.readout b{font-size:11px;color:var(--ink);font-weight:500;letter-spacing:.12em;text-transform:uppercase}
.readout #ro-state{display:flex;align-items:center;gap:8px}
.readout #ro-state::before{content:"";width:46px;height:2px;background:linear-gradient(90deg,var(--brass) var(--pct,0%),var(--line) 0)}

.hint{position:fixed;left:50%;bottom:30px;transform:translateX(-50%);z-index:6;display:grid;justify-items:center;gap:8px;font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-2);opacity:0;transition:opacity .5s;pointer-events:none}
.hint i{width:120px;height:1px;background:linear-gradient(90deg,transparent,var(--ink-2),transparent)}
.hint.on{opacity:1}

/* minimap */
.plan{position:fixed;right:28px;bottom:24px;z-index:6;margin:0;width:176px;padding:12px 12px 10px;background:var(--panel);backdrop-filter:blur(14px) saturate(1.2);-webkit-backdrop-filter:blur(14px) saturate(1.2);border:1px solid var(--line);border-radius:4px;transition:opacity .5s}
.plan svg{display:block;width:100%;height:auto;overflow:visible}
.plan figcaption{display:flex;justify-content:space-between;font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-top:8px}
.plan figcaption span{color:var(--ink-2)}
.plan .r{fill:rgba(243,237,226,.03);stroke:none;cursor:pointer;transition:fill .3s}
.plan .r:hover{fill:rgba(226,196,143,.18)}
.plan .r.on{fill:rgba(127,243,228,.12)}
.plan .w{fill:var(--ink)}
.plan .cone{fill:url(#coneG)}
.plan .me{fill:var(--teal)}

/* dialog */
dialog{border:1px solid var(--line);background:rgba(14,17,20,.9);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);color:var(--ink);border-radius:6px;padding:34px;width:min(440px,calc(100vw - 32px));max-height:calc(100dvh - 32px)}
dialog::backdrop{background:rgba(5,7,9,.55);backdrop-filter:blur(3px)}
dialog form,dialog .thanks{display:grid;gap:14px;position:relative}
dialog h2{font-family:var(--serif);font-weight:400;font-size:40px;line-height:1;margin:0 0 6px}
dialog h2 em{color:var(--ink-2)}
dialog .kick{margin:0;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--brass)}
dialog label{display:grid;gap:6px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-3)}
dialog input,dialog select{font:inherit;font-size:15px;letter-spacing:0;text-transform:none;color:var(--ink);background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:4px;padding:11px 12px;outline:none}
dialog input:focus,dialog select:focus{border-color:var(--brass)}
dialog select option{background:#14181b}
dialog .wide{width:100%;padding:13px;font-size:13px;margin-top:4px}
dialog .fine{margin:0;font-size:11px;color:var(--ink-3)}
dialog .thanks p{margin:0;color:var(--ink-2);line-height:1.55;font-size:14px}
dialog .row{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}
dialog .x{position:absolute;right:-18px;top:-22px;border:0;background:transparent;font-size:26px;color:var(--ink-3);cursor:pointer;line-height:1}

.credit{position:fixed;left:50%;transform:translateX(-50%);top:22px;z-index:9;font-size:11px;color:var(--ink-3);text-decoration:none;letter-spacing:.04em;white-space:nowrap;transition:color .2s}
.credit b{font-weight:500;color:var(--ink-2)}
.credit:hover{color:var(--ink)}
.nojs{position:fixed;inset:0;display:grid;place-content:center;font-size:15px}
body.blueprint .plan{opacity:.85}

@media (max-width:1100px){.credit{display:none}}
@media (max-width:760px){
  .top{padding:14px 16px}
  .brand .sub,.brand .sep{display:none}
  .tool{padding:7px 7px}
  .tool span{font-size:11px}
  #t-sound{display:none}
  .book{padding:9px 12px}
  .rail{display:none}
  .ch{left:16px;right:16px;max-width:none;top:auto;bottom:150px;transform:none}
  .ch .lede{font-size:14px;max-width:none}
  .ch .stats{gap:18px}
  .ch .stats b{font-size:24px}
  .note{left:16px;right:auto;top:84px;max-width:62vw}
  .note p{font-size:19px}
  .plan{width:118px;right:12px;bottom:12px;padding:8px}
  .plan figcaption{font-size:8px}
  .readout{left:16px;bottom:16px}
  .hint{display:none}
  .tag .lbl{font-size:10px}
  .scrim{background:linear-gradient(0deg,rgba(7,9,11,.82),rgba(7,9,11,.45) 32%,transparent 58%)}
  .room b{font-size:13px}
  .room span{display:none}
}