:root { --t: #2fd3c4; --k: #e0773a; --cream: #f1e6c8; --gold: #c9a043; --ink: #0c0d0c; --green: #1f4a3d; --dim: rgba(241, 230, 200, .66); }
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; height: 100%; background: var(--ink); color: var(--cream); overflow: hidden;
  font: 16px/1.45 Georgia, "Times New Roman", serif; user-select: none; touch-action: none; }
#game { position: fixed; inset: 0; width: 100%; height: 100%; display: block; }
.hidden { display: none !important; }
b.t { color: var(--t); } b.k { color: var(--k); }

/* ---------------------------------------------------------------- loading */
#loading { position: fixed; inset: 0; display: grid; place-content: center; gap: 22px; background: var(--ink); z-index: 60; text-align: center; transition: opacity .8s; }
#loading .word { font-size: clamp(30px, 7vw, 72px); letter-spacing: .32em; padding-left: .32em; color: var(--cream); }
#loading .bar { width: min(60vw, 380px); height: 2px; margin: 0 auto; background: rgba(255,255,255,.12); }
#loading .bar i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--t), var(--gold), var(--k)); transition: width .3s; }
#loading p { margin: 0; letter-spacing: .3em; font-size: 12px; color: var(--dim); text-transform: uppercase; }
#loading.out { opacity: 0; pointer-events: none; }
#fade { position: fixed; inset: 0; background: #000; opacity: 0; pointer-events: none; z-index: 30; transition: opacity .6s; }
#fade.on { opacity: 1; }

/* ---------------------------------------------------------------- HUD */
#hud { position: fixed; inset: 0; pointer-events: none; z-index: 5; }
#cross { position: absolute; left: 50%; top: 50%; width: 80px; height: 80px; margin: -40px 0 0 -40px; }
#cross svg { width: 100%; height: 100%; overflow: visible; }
#cross .arc { fill: none; stroke-width: 3; stroke-linecap: round; opacity: .55; transition: opacity .2s, stroke-width .2s; }
#cross .arc.t { stroke: var(--t); } #cross .arc.k { stroke: var(--k); }
#cross .arc.on { opacity: 1; stroke-width: 4.5; filter: drop-shadow(0 0 4px currentColor); }
#cross .arc.off { opacity: 0; }
#cross .arc.refused { opacity: 1; stroke: #d23a2a; stroke-width: 4.5; animation: refused .45s ease-out; }
@keyframes refused { 0%, 40% { transform: translateX(0); } 15% { transform: translateX(-2px); } 30% { transform: translateX(2px); } }
#cross .dot { fill: rgba(255,255,255,.85); }
/* R held: a ring fills round the crosshair, the chamber restarts when it is full */
#restart { position: absolute; left: 50%; top: 50%; width: 64px; height: 64px; margin: -32px 0 0 -32px; opacity: 0; transition: opacity .12s; --p: 0; }
#restart.show { opacity: 1; }
#restart i { position: absolute; inset: 0; border-radius: 50%; background: conic-gradient(var(--gold) calc(var(--p) * 360deg), rgba(255,255,255,.18) 0);
  -webkit-mask: radial-gradient(circle, transparent 27px, #000 28px); mask: radial-gradient(circle, transparent 27px, #000 28px); }
#restart span { position: absolute; left: 50%; top: -28px; transform: translateX(-50%); white-space: nowrap; font-size: 14px; letter-spacing: .08em; color: var(--gold); text-shadow: 0 1px 6px rgba(0,0,0,.9); }
#prompt { position: absolute; left: 50%; top: calc(50% + 46px); transform: translateX(-50%); font-size: 15px; letter-spacing: .06em; white-space: nowrap;
  padding: 5px 12px; border-radius: 4px; background: rgba(10, 12, 10, .55); border: 1px solid rgba(201, 160, 67, .5); opacity: 0; transition: opacity .15s; }
#prompt.show { opacity: 1; }
#prompt kbd { font: 700 13px/1 ui-monospace, Consolas, monospace; color: var(--gold); border: 1px solid var(--gold); border-radius: 3px; padding: 2px 5px; margin-right: 8px; }
#chamberTitle { position: absolute; left: 50%; top: 14%; transform: translateX(-50%); text-align: center; opacity: 0; transition: opacity 1s; text-shadow: 0 2px 12px #000; }
#chamberTitle.show { opacity: 1; }
#chamberTitle .k { display: block; letter-spacing: .5em; font-size: 13px; color: var(--gold); text-transform: uppercase; padding-left: .5em; }
#chamberTitle b { display: block; font-weight: 400; font-size: clamp(28px, 5vw, 54px); letter-spacing: .12em; margin-top: 6px; }

#subs { position: fixed; left: 50%; bottom: max(7vh, 70px); transform: translateX(-50%); width: min(88vw, 780px); text-align: center; z-index: 6; pointer-events: none;
  opacity: 0; transition: opacity .35s; }
#subs.show { opacity: 1; }
/* the ending: a picture of Vienna at dawn, credits rolling up over it */
#screen.endscreen { background: #0b0d10; }
.ending { position: fixed; inset: 0; overflow: hidden; }
.ending img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; animation: dawnzoom 90s ease-out forwards; }
.ending .dawn { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(10,14,24,.15) 0%, rgba(10,14,24,0) 40%, rgba(8,10,14,.75) 100%); }
/* the end of the Nachtrag: Vienna at night, in black and white like the sewers */
.ending.night img { filter: grayscale(1) contrast(1.15); }
.ending.night .dawn { background: linear-gradient(180deg, rgba(4,5,8,.35) 0%, rgba(4,5,8,.05) 45%, rgba(3,4,6,.85) 100%); }
.ending .roll { position: absolute; left: 0; right: 0; top: 0; bottom: 0; overflow: hidden; -webkit-mask-image: linear-gradient(180deg, transparent 0, #000 18%, #000 80%, transparent 100%); mask-image: linear-gradient(180deg, transparent 0, #000 18%, #000 80%, transparent 100%); }
.ending .inner { position: absolute; left: 50%; width: min(86vw, 620px); transform: translate(-50%, 100vh); text-align: center; color: #f3e9cf; text-shadow: 0 2px 10px rgba(0,0,0,.8); animation: credits 110s linear forwards; }
.ending h1 { font: 700 44px Georgia, serif; letter-spacing: .18em; margin: 0 0 30px; }
.ending h3 { font: 600 13px Georgia, serif; letter-spacing: .35em; text-transform: uppercase; color: var(--gold); margin: 34px 0 8px; }
.ending p { font: 18px/1.6 Georgia, serif; margin: 0; }
.ending .row { position: absolute; right: 24px; bottom: 22px; }
@keyframes credits { to { transform: translate(-50%, -100%); } }
@keyframes dawnzoom { from { transform: scale(1.12); filter: brightness(.55) saturate(.8); } to { transform: scale(1); filter: brightness(1) saturate(1); } }
/* hits from the porters: the edge of the picture turns red */
#harm { position: fixed; inset: 0; pointer-events: none; z-index: 5; opacity: 0; background: radial-gradient(ellipse at center, rgba(160,20,10,0) 45%, rgba(160,20,10,.75) 100%); }
/* the alarm: the edges of the picture pulse red */
#alarmfx { position: fixed; inset: 0; pointer-events: none; z-index: 4; opacity: 0; transition: opacity .6s;
  background: radial-gradient(ellipse at center, rgba(200,20,10,0) 55%, rgba(200,20,10,.38) 100%); }
#alarmfx.on { animation: alarmPulse 1.25s ease-in-out infinite; }
@keyframes alarmPulse { 0%, 100% { opacity: .25 } 50% { opacity: 1 } }
/* a deadline: an enamel plate at the top with the time left */
#countdown { position: fixed; top: max(2.5vh, 14px); left: 50%; transform: translate(-50%, -160%); z-index: 6; pointer-events: none;
  padding: 5px 20px 7px; text-align: center; background: #f1ece0; color: #1d1a17; border: 3px solid #1d1a17; outline: 2px solid #f1ece0;
  border-radius: 4px; box-shadow: 0 6px 20px rgba(0,0,0,.5); transition: transform .45s cubic-bezier(.2,.8,.2,1.1); }
#countdown.show { transform: translate(-50%, 0); }
#countdown .lbl { display: block; font: 600 10px Georgia, serif; letter-spacing: .3em; text-transform: uppercase; color: #a8462f; }
#countdown b { font: 700 30px/1.1 Georgia, serif; font-variant-numeric: tabular-nums; letter-spacing: .06em; }
#countdown.urgent b { color: #b0180c; }
/* a note from a pneumatic-post capsule: a slip of paper with a typewritten message */
#note { position: fixed; right: max(3vw, 16px); top: 18vh; width: min(78vw, 330px); z-index: 6; pointer-events: none; padding: 18px 20px 14px;
  background: #efe5cc; color: #2a2118; font: 15px/1.55 'Courier New', monospace; box-shadow: 0 10px 30px rgba(0,0,0,.55); border-top: 6px solid #a8462f;
  transform: translateX(120%) rotate(2deg); transition: transform .6s cubic-bezier(.2,.8,.2,1.1); }
#note.show { transform: translateX(0) rotate(-1.5deg); }
#note .who { display: block; font: 600 10px Georgia, serif; letter-spacing: .25em; text-transform: uppercase; color: #a8462f; margin-bottom: 8px; }
#note p { margin: 0 0 8px; white-space: pre-line; }
#note i { display: block; text-align: right; font: italic 15px Georgia, serif; color: #4a3a28; }
#subs .who { display: block; font-size: 11px; letter-spacing: .4em; text-transform: uppercase; color: var(--gold); margin-bottom: 4px; }
#subs .txt { display: inline; font-size: clamp(16px, 2.1vw, 21px); line-height: 1.5; padding: 3px 10px; background: rgba(8, 10, 8, .62); box-decoration-break: clone; -webkit-box-decoration-break: clone; }

#clickplay { position: fixed; inset: 0; z-index: 8; display: grid; place-content: center; text-align: center; gap: 6px; background: rgba(0,0,0,.35); cursor: pointer; }
#clickplay b { font-weight: 400; font-size: 22px; letter-spacing: .08em; }
#clickplay span { color: var(--dim); font-size: 14px; }

/* ---------------------------------------------------------------- menus */
#screen { position: fixed; inset: 0; z-index: 10; display: grid; place-items: center; pointer-events: none; }
#screen > * { pointer-events: auto; }
.title { display: grid; justify-items: center; gap: 8px; padding: 16px; text-align: center; margin-top: -4vh; }
.title .kk { letter-spacing: .6em; font-size: 12px; color: var(--gold); padding-left: .6em; text-transform: uppercase; }
.title h1 { margin: 0; font-weight: 400; font-size: clamp(38px, 9vw, 110px); letter-spacing: .26em; padding-left: .26em; line-height: 1;
  background: linear-gradient(180deg, #fff8e6 10%, #e7cf95 60%, #a8823c); -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(0 6px 24px rgba(0,0,0,.8)); }
.title .orn { width: min(70vw, 520px); height: 14px; margin: 4px 0 2px; background:
  radial-gradient(circle at 50% 50%, var(--gold) 0 3px, transparent 4px),
  linear-gradient(90deg, transparent, var(--t) 18%, var(--gold) 50%, var(--k) 82%, transparent) center / 100% 1px no-repeat; }
.title .tag { letter-spacing: .22em; font-size: 13px; color: var(--cream); text-shadow: 0 2px 8px #000; margin: 0 0 16px; font-style: italic; }
.menu { display: grid; gap: 9px; width: min(80vw, 330px); }
.btn { font: 400 16px/1 Georgia, serif; letter-spacing: .14em; color: var(--cream); cursor: pointer; padding: 13px 18px; border-radius: 2px;
  border: 1px solid rgba(201, 160, 67, .45); background: rgba(14, 18, 15, .66); backdrop-filter: blur(6px); transition: .15s; text-transform: uppercase; }
.btn:hover, .btn:focus-visible, .btn.sel { outline: none; border-color: var(--gold); background: rgba(31, 74, 61, .9); color: #fff; }
.btn:disabled { opacity: .35; cursor: default; }
.btn.small { font-size: 12px; padding: 9px 12px; }
.foot { position: fixed; left: 0; right: 0; bottom: max(10px, env(safe-area-inset-bottom)); text-align: center; font-size: 12px; color: var(--dim); text-shadow: 0 1px 4px #000; pointer-events: none; padding: 0 16px; }
.lang { position: fixed; top: max(12px, env(safe-area-inset-top)); right: max(14px, env(safe-area-inset-right)); display: flex; gap: 6px; }
.lang .btn.on { border-color: var(--gold); background: rgba(31, 74, 61, .9); }
.panel { width: min(94vw, 720px); max-height: 86vh; overflow: auto; padding: 24px 28px; border-radius: 3px; background: rgba(12, 15, 13, .9); backdrop-filter: blur(8px);
  border: 1px solid rgba(201, 160, 67, .4); box-shadow: 0 20px 60px rgba(0,0,0,.6); touch-action: pan-y; }
.panel h2 { margin: 0 0 16px; font-weight: 400; letter-spacing: .2em; text-transform: uppercase; font-size: 20px; color: var(--gold); }
.panel p { margin: 0 0 12px; }
.panel .row { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }
.panel .opt { display: grid; grid-template-columns: 1fr auto; gap: 12px 18px; align-items: center; }
.panel input[type=range] { width: 170px; accent-color: var(--gold); }
.panel .seg { display: flex; gap: 6px; } .panel .seg .btn { padding: 8px 10px; font-size: 12px; }
.panel .seg .btn.on { border-color: var(--gold); background: rgba(31, 74, 61, .9); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; }
.ccard { text-align: left; padding: 16px; border: 1px solid rgba(201,160,67,.4); background: rgba(31, 74, 61, .35); cursor: pointer; color: var(--cream); font: inherit; border-radius: 2px; }
.ccard:hover, .ccard:focus-visible { border-color: var(--gold); background: rgba(31, 74, 61, .8); outline: none; }
.ccard:disabled { opacity: .35; cursor: default; }
.ccard .n { letter-spacing: .3em; font-size: 11px; color: var(--gold); text-transform: uppercase; }
.ccard b { display: block; font-weight: 400; font-size: 21px; margin: 6px 0; }
.ccard small { color: var(--dim); }
.result { text-align: center; }
.result .n { letter-spacing: .5em; font-size: 12px; color: var(--gold); text-transform: uppercase; }
.result h2 { font-size: clamp(26px, 4vw, 40px); letter-spacing: .1em; color: var(--cream); margin: 8px 0 4px; text-transform: none; }
.result .stamp { display: inline-block; margin: 6px 0 14px; padding: 4px 14px; border: 2px solid #a8463a; color: #e0705e; transform: rotate(-4deg); letter-spacing: .3em; text-transform: uppercase; font-size: 15px; }
.result table { margin: 4px auto 8px; border-collapse: collapse; } .result td { padding: 3px 12px; } .result td + td { text-align: right; color: #fff; }

/* ---------------------------------------------------------------- touch */
#touch { position: fixed; inset: 0; z-index: 9; pointer-events: none; }
#touch .lookzone { position: absolute; right: 0; top: 0; bottom: 0; width: 58%; pointer-events: auto; touch-action: none; }
#touch .stick { position: absolute; left: max(18px, env(safe-area-inset-left)); bottom: max(22px, env(safe-area-inset-bottom)); width: 140px; height: 140px; border-radius: 50%;
  background: rgba(255,255,255,.07); border: 1px solid rgba(241,230,200,.3); pointer-events: auto; touch-action: none; }
#touch .knob { position: absolute; left: 50%; top: 50%; width: 58px; height: 58px; margin: -29px 0 0 -29px; border-radius: 50%; background: rgba(241,230,200,.3); }
#touch .btns { position: absolute; right: max(16px, env(safe-area-inset-right)); bottom: max(20px, env(safe-area-inset-bottom)); display: grid; grid-template-columns: 72px 72px; gap: 12px; pointer-events: none; }
#touch .btns button { width: 72px; height: 72px; border-radius: 50%; border: 2px solid rgba(255,255,255,.35); pointer-events: auto; touch-action: none; color: #fff; font: 700 22px/1 Georgia, serif; background: rgba(0,0,0,.35); }
#touch .b-t { background: rgba(47, 211, 196, .45) !important; } #touch .b-k { background: rgba(224, 119, 58, .5) !important; }
#touch .btns button.on { filter: brightness(1.6); }
#touch .b-menu { position: absolute; top: max(12px, env(safe-area-inset-top)); left: 50%; transform: translateX(-50%); width: 46px; height: 36px; border-radius: 4px; border: 1px solid rgba(255,255,255,.3); background: rgba(0,0,0,.4); color: #fff; font-weight: 700; pointer-events: auto; }
@media (max-width: 600px) { .panel { padding: 18px; } .title .tag { font-size: 11px; } }

/* title on the left, the endless corridor on the right; a shadow behind the left half keeps the lettering
   readable on the white tiles */
#screen.titlescreen { place-items: center start;
  background: linear-gradient(90deg, rgba(9,11,10,.82) 0%, rgba(9,11,10,.66) 30%, rgba(9,11,10,.25) 52%, rgba(9,11,10,0) 66%),
    linear-gradient(0deg, rgba(9,11,10,.55), rgba(9,11,10,0) 14%); }
#screen.titlescreen .title { justify-items: start; text-align: left; margin: 0 0 0 max(5vw, 20px); padding: 0; }
#screen.titlescreen .title h1 { padding-left: 0; font-size: clamp(36px, 7.4vw, 96px); }
#screen.titlescreen .title .kk { padding-left: 0; }
#screen.titlescreen .orn { background: radial-gradient(circle at 6px 50%, var(--gold) 0 3px, transparent 4px), linear-gradient(90deg, var(--t), var(--gold) 50%, var(--k) 80%, transparent) 12px 50% / calc(100% - 12px) 1px no-repeat; }
@media (max-width: 700px) {
  #screen.titlescreen { place-items: center; background: radial-gradient(ellipse at center, rgba(9,11,10,.78) 20%, rgba(9,11,10,.45) 85%); }
  #screen.titlescreen .title h1 { font-size: 9.6vw; letter-spacing: .08em; padding-left: .08em; }
  #screen.titlescreen .title { justify-items: center; text-align: center; margin: 0; }
}
.panel h3.act { font-weight: 400; font-size: 13px; letter-spacing: .25em; text-transform: uppercase; color: var(--dim); margin: 18px 0 10px; }
.panel h3.act:first-of-type { margin-top: 0; }
.ccard em.new { font-style: normal; color: var(--t); border: 1px solid var(--t); padding: 0 5px; margin-left: 6px; letter-spacing: .1em; font-size: 10px; }