:root{
  color-scheme:dark;
  --ink:#061012;
  --ink-2:#091719;
  --paper:#edf0e4;
  --muted:#91a4a1;
  --dim:#46605f;
  --line:#21383a;
  --copper:#d8a25d;
  --copper-bright:#f1c477;
  --cyan:#9ce3df;
  --cyan-dim:#3f7f83;
  --pad:max(20px,env(safe-area-inset-left));
}
*{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden;background:var(--ink);color:var(--paper)}
body{font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
button, [tabindex]{touch-action:manipulation}
button:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}
[hidden]{display:none!important}
.experience{position:fixed;inset:0;min-height:100svh;overflow:hidden;isolation:isolate;background:radial-gradient(90% 90% at 18% 44%,#0c2325 0%,var(--ink) 55%,#04090a 100%)}
.field{position:absolute;inset:0;width:100%;height:100%;z-index:-3}
.grain{position:absolute;inset:-80px;z-index:-2;pointer-events:none;opacity:.14;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='128' height='128' viewBox='0 0 128 128'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.28'/%3E%3C/svg%3E");mix-blend-mode:soft-light}
.mast{position:absolute;left:var(--pad);top:max(18px,env(safe-area-inset-top));display:grid;grid-template-columns:auto;gap:3px;z-index:3;max-width:min(430px,68vw)}
.date{margin:0;color:var(--muted);font-size:10px;font-weight:700;letter-spacing:.26em;text-transform:uppercase}
h1{margin:0;font-size:clamp(18px,2.5vw,32px);font-weight:560;letter-spacing:-.035em;line-height:1.03;text-wrap:balance}
.sound{position:fixed;top:max(16px,env(safe-area-inset-top));right:var(--pad);min-width:110px;min-height:46px;border:1px solid var(--line);border-radius:999px;background:rgba(6,16,18,.7);display:flex;align-items:center;justify-content:center;gap:9px;color:var(--muted);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;backdrop-filter:blur(8px);cursor:pointer}
.sound[aria-pressed="true"]{border-color:rgba(156,227,223,.5);color:var(--cyan)}
.sound__mark{font-size:22px;line-height:0;transform:translateY(-1px)}
.route{position:absolute;right:var(--pad);top:50%;transform:translateY(-50%);z-index:2}
.route ol{list-style:none;margin:0;padding:0;display:grid;gap:20px}
.route li{position:relative;display:grid;grid-template-columns:23px auto;align-items:center;gap:9px;color:#55706f;font-size:10px;letter-spacing:.16em;text-transform:uppercase;transition:color .4s ease,transform .4s ease}
.route li::before{content:"";position:absolute;left:8px;top:22px;width:1px;height:20px;background:var(--line)}
.route li:last-child::before{display:none}
.route li span{font-variant-numeric:tabular-nums}
.route li b{font-weight:700}
.route li.is-done{color:var(--copper)}
.route li.is-current{color:var(--paper);transform:translateX(-5px)}
.route li.is-current span{color:var(--cyan)}
.chapter{position:absolute;left:var(--pad);bottom:clamp(210px,29vh,280px);z-index:2;width:min(520px,calc(100vw - 180px));transition:opacity .25s ease,transform .35s ease}
.chapter.is-changing{opacity:0;transform:translateY(10px)}
.chapter__number{margin:0 0 9px;color:var(--copper);font-size:11px;font-weight:750;letter-spacing:.18em;text-transform:uppercase}
.chapter h2{margin:0;max-width:460px;font-size:clamp(25px,4.2vw,58px);font-weight:480;line-height:.98;letter-spacing:-.048em;text-wrap:balance}
.chapter__copy{margin:13px 0 0;max-width:460px;color:var(--muted);font-size:clamp(13px,1.25vw,17px);line-height:1.45;text-wrap:pretty}
.kept{margin-top:15px;display:flex;flex-wrap:wrap;gap:7px;min-height:21px}
.kept span{padding:4px 8px;border-left:2px solid var(--copper);background:rgba(216,162,93,.07);color:#baa47f;font-size:9px;font-weight:750;letter-spacing:.14em;text-transform:uppercase}
.controls{position:absolute;left:var(--pad);right:var(--pad);bottom:max(18px,env(safe-area-inset-bottom));z-index:4;max-width:760px}
.intro-actions{display:flex;align-items:center;gap:17px}
.intro-actions p{margin:0;color:var(--dim);font-size:11px;letter-spacing:.04em}
.begin,.play-final{min-height:58px;padding:0 18px 0 22px;border:1px solid rgba(216,162,93,.55);background:rgba(13,29,31,.78);display:flex;align-items:center;gap:28px;color:var(--paper);font-weight:720;letter-spacing:.02em;cursor:pointer;backdrop-filter:blur(8px)}
kbd{min-width:43px;padding:6px 8px;border:1px solid var(--line);border-radius:2px;background:#071012;color:var(--muted);font:700 9px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.08em;text-align:center;box-shadow:none}
.choice-actions{display:grid;grid-template-columns:minmax(0,1fr) 190px;gap:10px;align-items:stretch}
.choices{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.choice{position:relative;min-height:82px;padding:13px 15px 12px 49px;border:1px solid var(--line);background:rgba(6,16,18,.72);display:grid;align-content:center;gap:3px;text-align:left;cursor:pointer;backdrop-filter:blur(8px);transition:border-color .2s ease,background .2s ease,transform .2s ease}
.choice:hover{border-color:var(--dim)}
.choice.is-selected{border-color:var(--cyan-dim);background:rgba(18,46,48,.75);transform:translateY(-2px)}
.choice__key{position:absolute;left:13px;top:50%;transform:translateY(-50%);width:24px;height:24px;border:1px solid var(--dim);display:grid;place-items:center;color:var(--cyan);font:700 10px ui-monospace,monospace}
.choice b{font-size:15px;font-weight:700;letter-spacing:.01em;text-transform:lowercase}
.choice small{color:var(--muted);font-size:10px;line-height:1.25}
.preserve{min-height:82px;padding:12px 14px;border:0;background:var(--copper);color:#17130d;display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:8px;font-weight:820;text-align:left;cursor:pointer}
.preserve kbd{border-color:rgba(22,18,11,.24);background:rgba(22,18,11,.12);color:#332716}
.final-actions{display:flex;gap:10px;align-items:stretch}
.restart{min-height:58px;padding:0 17px;border:1px solid var(--line);background:rgba(6,16,18,.78);color:var(--muted);font-size:11px;font-weight:720;letter-spacing:.08em;text-transform:uppercase;cursor:pointer}
.keyboard-hint{position:absolute;right:var(--pad);bottom:max(18px,env(safe-area-inset-bottom));margin:0;color:#3f5757;font-size:9px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}
.live-status{position:fixed;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.static-poster{display:none}

/* signal field */
.field .ambient{fill:none;stroke:#162d2f;stroke-width:2;opacity:.8}
.field .ambient--fine{stroke-width:1;opacity:.45}
.field .copper{fill:none;stroke:var(--copper);stroke-width:5;stroke-linecap:round;stroke-linejoin:round}
.field .copper-thin{fill:none;stroke:var(--copper);stroke-width:2;stroke-linecap:round}
.field .cyan{fill:var(--cyan)}
.field .cyan-dim{fill:var(--cyan-dim)}
.field .node{fill:var(--ink);stroke:var(--copper);stroke-width:3}
.field .signal-travel{stroke-dasharray:10 17;animation:travel 1.8s linear infinite}
.field .breathe{transform-box:fill-box;transform-origin:center;animation:breathe 2.7s ease-in-out infinite}
.field .vibrate{transform-box:fill-box;transform-origin:center;animation:vibrate .15s linear infinite alternate}
.field .bit{opacity:.25;animation:bits 1.1s steps(2,end) infinite}
.field .bit:nth-child(3n){animation-delay:.24s}.field .bit:nth-child(4n){animation-delay:.48s}
.field .final-trace{fill:none;stroke:var(--copper-bright);stroke-width:7;stroke-linecap:round;stroke-linejoin:round;filter:drop-shadow(0 0 12px rgba(241,196,119,.4));stroke-dasharray:1200;stroke-dashoffset:1200;animation:draw 1.35s cubic-bezier(.2,.7,.2,1) 1.05s forwards}
.field .final-original{fill:none;stroke:#5f7776;stroke-width:3;stroke-linecap:round;stroke-linejoin:round;stroke-dasharray:9 14;opacity:0;animation:recall 1.05s ease .12s forwards}
.field .final-envelope{fill:none;stroke:var(--cyan-dim);stroke-width:2;opacity:.55}
.field .final-overtone{fill:none;stroke:var(--cyan);stroke-width:2;stroke-dasharray:3 9;opacity:.58}
.field .final-impact{fill:none;stroke:var(--cyan);stroke-width:3;opacity:.7}
.field .final-pixel{fill:var(--cyan);opacity:0;animation:arrive .45s ease forwards}
.field .final-pixel:nth-child(3n){animation-delay:.16s}.field .final-pixel:nth-child(4n){animation-delay:.32s}.field .final-pixel:nth-child(5n){animation-delay:.48s}
@keyframes travel{to{stroke-dashoffset:-54}}
@keyframes breathe{50%{opacity:.35;transform:scale(.985)}}
@keyframes vibrate{to{transform:translateX(2px)}}
@keyframes bits{50%{opacity:.85}}
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes recall{0%{opacity:0}35%{opacity:.82}100%{opacity:.16}}
@keyframes arrive{to{opacity:.8}}

@media (max-width:720px){
  :root{--pad:max(15px,env(safe-area-inset-left))}
  .mast{top:max(14px,env(safe-area-inset-top));max-width:calc(100vw - 140px)}
  h1{font-size:18px;line-height:1.08}
  .date{font-size:8px}
  .sound{right:max(12px,env(safe-area-inset-right));min-width:104px;min-height:44px;font-size:9px}
  .route{right:max(13px,env(safe-area-inset-right));top:39%;transform:none}
  .route ol{gap:13px}
  .route li{grid-template-columns:20px;font-size:8px;gap:4px}
  .route li b{display:none}
  .route li::before{left:6px;top:17px;height:13px}
  .chapter{left:var(--pad);bottom:250px;width:calc(100vw - 76px)}
  .chapter h2{font-size:clamp(27px,8vw,39px);max-width:330px}
  .chapter__copy{font-size:12px;max-width:300px;line-height:1.42}
  .chapter__number{font-size:9px;margin-bottom:7px}
  .kept{margin-top:10px;gap:4px}.kept span{font-size:7px;padding:3px 6px}
  .controls{left:var(--pad);right:max(15px,env(safe-area-inset-right));bottom:max(13px,env(safe-area-inset-bottom));max-width:none}
  .intro-actions{display:grid;gap:9px}.intro-actions p{font-size:9px}
  .begin,.play-final{width:100%;justify-content:space-between;min-height:54px}
  .choice-actions{grid-template-columns:1fr;gap:8px}
  .choice{min-height:65px;padding:9px 8px 8px 42px}.choice b{font-size:13px}.choice small{font-size:8px}.choice__key{left:10px}
  .preserve{min-height:52px;flex-direction:row;align-items:center;justify-content:space-between;padding:9px 13px}
  .keyboard-hint{display:none}
  .final-actions{display:grid;grid-template-columns:1fr auto}.restart{min-height:54px}
  .field{transform:translateX(-6%);width:112%}
  body[data-complete="true"] .field{transform:none;width:100%}
  body[data-complete="true"] .chapter{top:104px;bottom:auto;width:calc(100vw - 74px)}
  body[data-complete="true"] .chapter h2{max-width:310px;font-size:clamp(25px,7.2vw,34px);line-height:1.02}
  body[data-complete="true"] .chapter__copy{max-width:300px;margin-top:10px;font-size:11px}
  body[data-complete="true"] .kept{display:grid;grid-template-columns:max-content max-content;gap:5px 7px;margin-top:11px}
  body[data-complete="true"] .kept span{font-size:7px;padding:3px 5px;background:rgba(6,16,18,.74)}
  body[data-complete="true"] .route{top:102px;transform:none}
}
@media (max-height:690px){
  .chapter{bottom:205px}.chapter h2{font-size:28px}.chapter__copy{font-size:11px;margin-top:8px}.kept{margin-top:8px}
  .choice{min-height:58px}.preserve{min-height:48px}.route{top:34%}
  body[data-complete="true"] .chapter{top:88px;bottom:auto}
  body[data-complete="true"] .chapter h2{font-size:24px;max-width:260px}
  body[data-complete="true"] .route{top:90px}
}
@media (pointer:coarse){.choice,.preserve,.begin,.play-final,.restart,.sound{min-height:52px}}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{scroll-behavior:auto!important;animation-duration:.001ms!important;animation-delay:0ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  .field .final-trace{stroke-dashoffset:0}
  .field .final-original{opacity:.18}
  .field .final-pixel{opacity:.8}
}
.no-js .experience{display:none}.no-js .static-poster{min-height:100%;padding:24px;display:grid;grid-template-columns:minmax(0,760px);place-content:center;gap:18px;background:var(--ink)}
.no-js .static-poster svg{display:block;width:min(100%,760px);max-height:78vh;margin:auto}.no-js .static-poster div{width:min(100%,760px);margin:auto;color:var(--muted);font-size:13px;line-height:1.5}.no-js .static-poster p{margin:.25em 0}