:root{font-family:'DM Sans',system-ui,sans-serif;color:#e9e7df;background:#100f0e;font-size:15px;--base:#11100e;--panel:#1a1916;--ink:#e7e3d8;--dim:#acaba3;--muted:#79786f;--line:rgba(221,211,187,.14);--gold:#d6a86d;--glow:#ebad63;--soft:rgba(200,155,91,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:var(--base);color:var(--ink);overflow-x:hidden}
body.station{--base:#091119;--panel:#10202a;--ink:#e1eff0;--dim:#9db3bd;--muted:#708d99;--line:rgba(144,204,213,.16);--gold:#79d3d1;--glow:#4fcfd4;--soft:rgba(99,207,220,.09)}
button,input,select{font:inherit}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer;color:inherit}button:disabled{opacity:.48;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--glow);outline-offset:3px}
/* Intentionally no global film grain: preserve crisp text and device pixels. */
.skip{position:absolute;top:-60px;left:1rem;z-index:120;background:var(--gold);color:#111;padding:1rem}.skip:focus{top:0}
.topbar{position:relative;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:20px clamp(18px,5vw,76px);border-bottom:1px solid var(--line);max-width:1680px;margin:auto}
.brand{display:flex;align-items:center;gap:15px;font-family:'Space Grotesk',system-ui;letter-spacing:.1em;font-size:13px;font-weight:700}
.brand-mark{display:grid;place-items:center;width:40px;height:40px;border:1px solid var(--gold);font-size:26px;color:var(--gold);transform:rotate(-7deg)}
.brand small{display:block;font-size:9px;letter-spacing:.21em;color:var(--muted);margin-top:4px}
.top-actions{display:flex;align-items:center;gap:12px}.top-actions .travel{display:flex;align-items:center;gap:12px;border:1px solid var(--gold);color:var(--gold);letter-spacing:.13em;padding:14px 17px;font-size:10px;font-weight:700;transition:.25s}.travel:hover,.primary:hover{filter:brightness(1.13)}
.ghost,.primary,.dark-button{border:1px solid var(--line);border-radius:3px;padding:12px 17px;background:rgba(255,255,255,.03);color:var(--ink);font-weight:600}.ghost:hover{background:var(--soft);border-color:var(--gold)}
.small{font-size:11px}.wide{width:100%}.primary{border-color:var(--gold);background:var(--gold);color:#111b1c;font-weight:700}.primary:disabled{opacity:.3}
.shell{max-width:1500px;margin:auto}.hero{min-height:560px;position:relative;display:grid;grid-template-columns:1.07fr .93fr;align-items:center;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-copy{position:relative;z-index:4;padding:clamp(40px,7vw,96px) clamp(22px,6vw,80px)}.eyebrow,.section-heading,.chapter-index{letter-spacing:.25em;font-size:10px;color:var(--gold);font-weight:700}
h1,h2,h3,p{margin-top:0}.hero h1,.outro h2{font-family:'Space Grotesk',system-ui;font-size:clamp(46px,6.8vw,101px);line-height:1.04;letter-spacing:-.068em;margin:25px 0}.hero h1 em,.outro h2 em{font-weight:400;color:var(--gold);font-style:normal}
.hero p{max-width:440px;color:var(--dim);font-size:16px;line-height:1.75}.hero-ctas{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:35px}.hero-ctas .primary{padding:17px 22px}.hero-note{color:var(--muted);font-size:11px}
.room-illustration{height:100%;min-height:440px;overflow:hidden;position:relative;background:radial-gradient(ellipse at 48% 43%,rgba(204,158,99,.14),transparent 43%),linear-gradient(135deg,rgba(255,255,255,.035),transparent),repeating-linear-gradient(90deg,transparent,transparent 78px,rgba(255,255,255,.028) 79px,transparent 81px)}
.station .room-illustration{background:radial-gradient(ellipse at 48% 43%,rgba(66,196,215,.2),transparent 43%),linear-gradient(135deg,rgba(255,255,255,.035),transparent),repeating-linear-gradient(90deg,transparent,transparent 78px,rgba(255,255,255,.028) 79px,transparent 81px)}
.room-illustration:before{content:"";position:absolute;inset:0;border:26px solid rgba(0,0,0,.19)}.halo{position:absolute;top:9%;left:15%;width:75%;aspect-ratio:1;border:1px solid rgba(208,170,108,.17);border-radius:50%;box-shadow:0 0 100px rgba(238,170,93,.09),inset 0 0 100px rgba(238,170,93,.06);animation:float 11s ease-in-out infinite}
.station .halo{border-color:rgba(103,233,241,.2);box-shadow:0 0 100px rgba(103,233,241,.08)}
.room-base{position:absolute;bottom:0;inset-inline:0;height:34%;background:linear-gradient(transparent,rgba(0,0,0,.36))}.room-window{position:absolute;left:23%;top:20%;width:55%;aspect-ratio:.94;border:9px solid #3a3229;background:radial-gradient(ellipse at 50% 45%,rgba(227,185,121,.32),rgba(7,9,9,.58) 66%),linear-gradient(45deg,transparent 48%,rgba(247,213,159,.2) 49%,transparent 51%);box-shadow:0 16px 70px rgba(0,0,0,.5),inset 0 0 40px #0a0b0b;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:32px;color:#e5c9a3;font-family:'Space Grotesk';letter-spacing:.25em;font-size:clamp(16px,2vw,28px)}
.station .room-window{border-radius:45%;border-color:#28424d;color:#a9f7e9;background:radial-gradient(ellipse at 50% 45%,rgba(94,218,221,.38),rgba(7,18,25,.7) 63%);box-shadow:0 0 110px rgba(67,190,211,.12),inset 0 0 60px #08191c}
.cabinet{position:absolute;left:5%;bottom:8%;width:28%;height:22%;border:5px solid #332a22;background:linear-gradient(115deg,#31291f,#161613);transform:skewY(-6deg);box-shadow:16px 22px 38px #040505}.cabinet i{display:block;margin:10% auto;height:12%;width:70%;border:1px solid #725b3f;background:linear-gradient(90deg,transparent,#9f7c4d,transparent)}.station .cabinet{border-color:#25414b;background:linear-gradient(115deg,#1c3440,#0c1720)}
.floor-line{position:absolute;bottom:12%;left:-8%;width:130%;height:1px;background:var(--line);transform:rotate(-7deg)}.signal-strip{position:absolute;bottom:0;left:0;width:100%;display:flex;justify-content:space-between;gap:1rem;padding:12px clamp(22px,6vw,80px);background:rgba(0,0,0,.32);font-size:9px;letter-spacing:.16em;color:var(--muted)}
.workspace{display:grid;grid-template-columns:305px 1fr;border-bottom:1px solid var(--line)}.rail{border-right:1px solid var(--line);padding:33px 24px 42px}.section-heading{display:flex;justify-content:space-between;gap:10px}.progress-track{height:3px;background:var(--line);margin:20px 0 22px}.progress-fill{height:100%;background:var(--gold);width:0%;transition:width .5s}
.chapter-list{display:grid;gap:6px}.chapter-btn{display:flex;align-items:center;gap:12px;border:1px solid transparent;background:transparent;padding:13px 11px;text-align:left;width:100%;border-radius:3px;color:var(--dim)}.chapter-btn:hover{background:var(--soft)}.chapter-btn.active{background:var(--soft);border-color:var(--line);color:var(--ink)}.chapter-btn .num{font-family:'Space Grotesk';font-size:12px;color:var(--muted)}.chapter-btn .chapter-title{flex:1;font-size:13px}.chapter-btn .status{color:var(--gold)}.chapter-btn[disabled]{opacity:.48}.rail-foot{border-top:1px solid var(--line);margin-top:32px;padding-top:24px;font-size:11px;line-height:1.7;color:var(--dim)}.rail-foot strong{color:var(--gold);letter-spacing:.06em}.rail-foot p{margin:10px 0}.rail-foot a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}
.main-work{min-width:0;padding:clamp(20px,4vw,64px)}.work-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px}.chapter-index{color:var(--muted)}.stage-root{min-height:480px;border:1px solid var(--line);background:linear-gradient(155deg,rgba(255,255,255,.033),transparent 55%),var(--panel);padding:clamp(19px,4vw,50px);position:relative;overflow:hidden}.stage-title{font:600 clamp(30px,4vw,58px)/1.05 'Space Grotesk',system-ui;letter-spacing:-.055em;max-width:600px;margin:15px 0}.stage-intro{color:var(--dim);line-height:1.75;max-width:680px;font-size:15px}.stage-badge{color:var(--gold);letter-spacing:.17em;font-size:10px;font-weight:700}
.scene{position:relative;margin:28px 0;border:1px solid var(--line);min-height:150px;border-radius:3px;padding:24px;background:radial-gradient(ellipse at 55% 0,rgba(201,163,104,.095),transparent 75%),rgba(0,0,0,.24)}.station .scene{background:radial-gradient(ellipse at 55% 0,rgba(90,203,215,.095),transparent 75%),rgba(0,0,0,.24)}
.inscription{padding:15px 18px;border-left:2px solid var(--gold);background:var(--soft);color:var(--dim);line-height:1.8;font-size:13px}.inscription strong{color:var(--ink)}.instruction{color:var(--muted);font-size:12px;margin:10px 0}.control-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:10px;margin:16px 0}.choice{min-height:62px;text-align:center;border:1px solid var(--line);background:rgba(255,255,255,.04);border-radius:3px;padding:12px;color:var(--ink);transition:.2s}.choice:hover,.choice.selected{border-color:var(--gold);background:var(--soft)}.choice small{display:block;margin-top:6px;color:var(--muted);font-size:10px}.choice:active{transform:scale(.97)}
.sequence{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding:10px 0;min-height:66px}.token{display:flex;align-items:center;gap:6px;padding:10px 13px;border:1px solid var(--gold);background:var(--soft);font-size:13px}.token span{color:var(--gold);font-size:10px}.button-row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:17px}.control{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:3px;color:var(--ink);padding:11px 15px;min-height:44px}.control:hover{border-color:var(--gold)}.input-code{width:min(100%,320px);background:#0d1111;border:1px solid var(--gold);color:var(--ink);font-size:clamp(22px,4vw,37px);letter-spacing:.28em;text-align:center;padding:16px;min-height:60px;border-radius:3px}
.work-bottom{display:flex;justify-content:space-between;align-items:center;gap:12px;min-height:75px;padding-top:18px}#feedback{font-size:13px;color:var(--gold);line-height:1.6;min-height:24px}.finished{border:1px solid var(--gold);padding:10px 15px;background:var(--soft);display:inline-block;font-size:12px;letter-spacing:.09em}
.morse-track{display:flex;align-items:center;gap:7px;min-height:62px;flex-wrap:wrap}.pulse-dot{width:14px;height:14px;border-radius:100%;background:var(--glow);box-shadow:0 0 15px var(--soft)}.pulse-dash{width:43px;height:13px;background:var(--glow)}.pulse-gap{width:20px}.meter{width:100%;height:10px;border:1px solid var(--line);background:linear-gradient(90deg,transparent,rgba(89,231,210,.2) 50%,transparent)}.gearset{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;padding:14px}.gear{height:104px;width:104px;border:9px dotted var(--gold);border-radius:50%;background:radial-gradient(circle,#27221c 30%,#4a3926 34%,#1a1b1b 36%,#242625 52%,#3a3127 57%);display:flex;flex-direction:column;align-items:center;justify-content:center;transform-origin:center;box-shadow:0 8px 25px #080808}.gear strong{font-size:17px}.gear small{font-size:10px;color:var(--dim)}
.photo{min-height:210px;background:linear-gradient(50deg,#272e2b,#494539 50%,#1c2829);border:13px solid #14191b;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;box-shadow:0 15px 50px #0008;transform:rotate(-1deg);font-size:13px;letter-spacing:.18em}.photo.revealed{box-shadow:0 0 70px rgba(112,208,205,.24);color:#d9fbf6}.photo strong{font:700 38px 'Space Grotesk';letter-spacing:.2em}
.uv-board{position:relative;isolation:isolate;touch-action:none;min-height:260px;border:12px ridge #382e26;background:repeating-linear-gradient(0deg,#bcb49b,#bcb49b 2px,#c8bda4 3px,#b8ac95 4px);color:#40382d;display:flex;align-items:center;justify-content:center;flex-direction:column;overflow:hidden;user-select:none}.uv-board p{color:#51452e;letter-spacing:.12em;z-index:1}.uv-hidden{font:700 clamp(30px,6vw,66px) 'Space Grotesk';letter-spacing:.2em;color:#66509d;opacity:0;transition:opacity .3s}.uv-board.lit .uv-hidden{opacity:.72}.uv-light{position:absolute;inset:0;pointer-events:none;z-index:3;background:radial-gradient(circle 100px at var(--x,50%) var(--y,50%),rgba(162,135,237,.4),rgba(40,19,69,.8) 46%,transparent 76%);mix-blend-mode:multiply;opacity:0}.uv-board.lit .uv-light{opacity:1}.uv-zones{display:flex;justify-content:space-between;width:100%;position:relative;z-index:5}.uv-zones button{min-height:44px;min-width:72px;border:1px dashed #675d51;color:#473d2b;background:#d9c7a9;font-size:12px}
.safe-stage{display:flex;align-items:center;justify-content:center;gap:20px;flex-wrap:wrap;min-height:260px;perspective:950px}.safe-box{position:relative;width:220px;height:222px;background:linear-gradient(135deg,#4e565a,#1d2529 56%,#565d61);border:12px solid #232b2d;box-shadow:15px 23px 50px #0009,inset 0 0 18px #111;transform-style:preserve-3d}.safe-door{position:absolute;inset:4px;background:linear-gradient(127deg,#70787b,#3c4748 46%,#222d31);border:7px solid #88908d;display:grid;place-items:center;transform-origin:left center;transition:transform 1.6s cubic-bezier(.3,.7,.1,1);backface-visibility:visible;z-index:2}.safe-door:before{content:"";position:absolute;width:82px;height:82px;border:10px solid #1c272b;border-radius:50%;background:repeating-conic-gradient(#67747c 0deg 15deg,#2e3538 15deg 30deg)}.safe-door span{position:relative;color:#d2d7d4;z-index:1;font-size:12px;letter-spacing:.2em}.safe-box.open .safe-door{transform:rotateY(-111deg)}.vault-inside{position:absolute;inset:0;background:radial-gradient(ellipse,#8f7450,#201810 58%,#070707);display:flex;align-items:center;justify-content:center}
.flying-paper{position:absolute;top:42%;left:30%;width:133px;min-height:154px;padding:20px 8px;background:#e2c8a1;color:#3e3221;font:700 14px 'Space Grotesk';text-align:center;opacity:0;transform:translate3d(-50%,10px,-20px) rotate(-40deg) scale(.25);box-shadow:0 3px 20px #000b;z-index:3;pointer-events:none}.safe-box.open .flying-paper{animation:fly-document 2.1s .75s cubic-bezier(.2,.65,.4,1) forwards}
@keyframes fly-document{0%{opacity:0;transform:translate3d(-50%,10px,-20px) rotate(-40deg) scale(.25)}30%{opacity:1;transform:translate3d(90px,-115px,80px) rotate(25deg) scale(.95)}70%{transform:translate3d(165px,-83px,90px) rotate(-7deg) scale(1.3)}100%{opacity:1;transform:translate3d(140px,-51px,90px) rotate(0) scale(1.15)}}
.clock-set{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px;margin:10px 0}.clockface{border:1px solid var(--line);padding:14px 8px;text-align:center;background:#0d181a}.clockface strong{font:600 clamp(16px,3.5vw,28px) 'Space Grotesk';color:var(--gold);display:block}.clockface span{font-size:10px;color:var(--muted)}.artifact-3d{width:100%;height:235px;border:1px solid var(--line);background:radial-gradient(ellipse,#153a43 0,#091417 65%);touch-action:none;display:block}.artifact-label{color:var(--gold);text-align:center;font-size:13px;min-height:40px}
.timeline{min-height:130px;display:flex;justify-content:center;gap:10px;align-items:center}.timeline span{width:38px;height:38px;display:grid;place-items:center;border:1px solid var(--line);color:var(--gold)}.outro{text-align:center;padding:100px 20px 125px}.outro-line{width:1px;height:70px;background:var(--gold);margin:auto auto 22px}.outro p{font-size:11px;letter-spacing:.26em;color:var(--gold)}.outro h2{font-size:clamp(33px,5.5vw,75px);margin-top:24px}.bonus-link{border:none;background:transparent;color:var(--muted);text-decoration:underline;text-underline-offset:7px;margin-top:25px}footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;padding:22px 5vw;border-top:1px solid var(--line);font-size:10px;letter-spacing:.1em;color:var(--muted)}
.modal[hidden]{display:none}.modal{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:20px}.modal-backdrop{position:absolute;inset:0;background:#000b;backdrop-filter:blur(7px)}.modal-panel{position:relative;width:min(100%,550px);max-height:93vh;overflow:auto;border:1px solid var(--gold);background:var(--panel);padding:clamp(22px,5vw,43px);box-shadow:0 35px 120px #000;z-index:1}.modal-panel h2{font:600 36px 'Space Grotesk';margin:10px 0}.modal-panel p{color:var(--dim);line-height:1.7}.modal-panel label{display:block;font-size:12px;margin-bottom:9px;color:var(--gold)}.modal-panel input{width:100%;background:#0b1011;border:1px solid var(--line);color:var(--ink);padding:12px;font-size:13px;min-height:44px}.copy-wrap{display:flex;gap:8px}.copy-wrap input{min-width:0}.smallprint{font-size:11px;color:var(--muted)!important}.modal-divider{border-top:1px solid var(--line);margin:22px 0}.close{position:absolute;right:13px;top:9px;font-size:30px;border:0;background:transparent}
.end-scene{text-align:center;padding:25px;position:relative;overflow:hidden}.end-scene .reveal-orbit{margin:auto;width:175px;height:175px;border:2px solid var(--gold);border-radius:50%;box-shadow:0 0 80px var(--soft),inset 0 0 50px var(--soft);display:grid;place-items:center;font-size:60px;animation:float 4s infinite}.end-scene h3{font:600 clamp(24px,4vw,43px) 'Space Grotesk';margin-top:35px}.end-scene p{line-height:1.8;color:var(--dim);max-width:580px;margin:auto auto 18px}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@media(max-width:900px){.hero{grid-template-columns:1fr}.hero-copy{padding-bottom:40px}.room-illustration{min-height:290px;height:290px}.hero h1{font-size:clamp(49px,9vw,87px)}.hero .signal-strip{padding:12px 25px}.workspace{grid-template-columns:1fr}.rail{border-right:none;border-bottom:1px solid var(--line);padding:25px 20px}.chapter-list{display:flex;overflow-x:auto;gap:6px;scroll-snap-type:x proximity}.chapter-btn{min-width:160px;scroll-snap-align:start}.rail-foot{display:none}.main-work{padding:22px}}
@media(max-width:530px){.topbar{padding:14px 16px}.brand{gap:8px;font-size:10px}.brand-mark{width:33px;height:33px}.brand small{font-size:7px}.top-actions{gap:6px}.top-actions .travel{padding:11px 9px;font-size:9px;max-width:130px}.top-actions .ghost{font-size:0;padding:12px}.top-actions .ghost span{font-size:16px}.hero-copy{padding:45px 22px 30px}.hero h1{font-size:clamp(48px,11vw,66px)}.room-illustration{height:260px;min-height:260px}.signal-strip{font-size:7px}.stage-root{padding:17px}.stage-title{font-size:37px}.gear{width:78px;height:78px;border-width:6px}.clock-set{gap:5px}.clockface{padding:11px 4px}.button-row .primary{flex:1}.safe-stage{min-height:320px}.safe-box{transform:scale(.84);transform-origin:center}.copy-wrap{flex-direction:column}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}.safe-box.open .flying-paper{opacity:1;transform:translate(140px,-55px) scale(1.1)}}
/* Mobile layout: prevent the scrollable chapter rail from expanding the grid's min-content width. */
html,body{max-width:100%;overflow-x:clip}
.shell,.hero,.workspace,.main-work,.rail,.stage-root,.scene{min-width:0;max-width:100%}
.workspace{grid-template-columns:305px minmax(0,1fr)}
.chapter-list{min-width:0;max-width:100%}
@media(max-width:900px){
  .workspace{grid-template-columns:minmax(0,1fr)}
  .rail{width:100%;overflow:hidden;min-width:0}
  .chapter-list{width:100%;overflow-x:auto;overscroll-behavior-x:contain}
  .chapter-btn{flex-shrink:0}
  .hero-copy,.room-illustration{min-width:0}
}
@media(max-width:530px){
  .control-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .control-grid .choice{min-width:0;overflow-wrap:anywhere}
  .topbar{min-width:0}
  .top-actions{min-width:0}
  .hero{min-width:0}
}
html{scroll-behavior:auto}

/* Scene objects: large tappable mystery-room hotspots rather than decorative scenery only. */
.room-illustration{isolation:isolate}
.hotspot-layer{position:absolute;inset:0;z-index:6;pointer-events:none}
.room-hotspot{position:absolute;width:75px;min-height:64px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;background:rgba(11,15,17,.66);border:1px solid var(--gold);color:var(--gold);border-radius:42px;backdrop-filter:blur(3px);pointer-events:auto;box-shadow:0 0 22px var(--soft);transition:transform .15s,background .2s}
.room-hotspot span{font-size:21px;line-height:1}.room-hotspot small{font-size:8px;letter-spacing:.06em;font-weight:700}.room-hotspot:hover,.room-hotspot:focus-visible{transform:scale(1.07);background:#1b292c}
.hotspot-a1,.hotspot-b1{left:10%;top:52%}.hotspot-a2,.hotspot-b2{right:13%;top:27%}.hotspot-a3,.hotspot-b3{right:16%;bottom:17%}
@media(max-width:530px){.room-hotspot{width:67px;min-height:56px}.hotspot-a1,.hotspot-b1{left:8%;top:55%}.hotspot-a2,.hotspot-b2{right:12%;top:23%}.hotspot-a3,.hotspot-b3{right:13%;bottom:22%}}

/* UV writing is legible only inside the movable flashlight beam. */
.uv-hidden{-webkit-mask-image:radial-gradient(circle 100px at var(--x,50%) var(--y,50%),black 35%,transparent 95%);mask-image:radial-gradient(circle 100px at var(--x,50%) var(--y,50%),black 35%,transparent 95%)}

/* Sharp modern mystery UI: no film grain, crisp text, normal image resampling. */
html,body{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
.room-illustration,.stage-root,.scene{image-rendering:auto}