:root{color-scheme:dark;background:#05080e;color:#f0f1f3;font-family:Arial,'PingFang SC',sans-serif}*{box-sizing:border-box}body{margin:0;overflow:hidden}#room-camera{position:fixed;inset:0;perspective:var(--focal);overflow:hidden}#room-scene{position:absolute;inset:0;transform-style:preserve-3d;transform:translateZ(var(--focal)) rotateY(var(--yaw))}.room-plane{position:absolute;inset:0;transform:rotateY(var(--angle)) translateZ(calc(-1 * var(--focal)));backface-visibility:hidden;transform-style:preserve-3d;pointer-events:none}.room-plane.is-active{pointer-events:auto}.language-switch{position:fixed;top:110px;left:50%;translate:-50% 0;display:flex;align-items:center;gap:8px;min-width:112px;justify-content:center;z-index:1000;color:#6f7480;font:600 10px/1 Arial,'PingFang SC',sans-serif;letter-spacing:.08em}.language-switch button{border:0;border-bottom:1px solid transparent;padding:6px 2px 5px;background:none;color:inherit;font:inherit;cursor:pointer}.language-switch button:hover{color:#c9cbd1}.language-switch button[aria-pressed=true]{color:#f0f1f3;border-bottom-color:#ef5a32}.language-switch span{color:#505560;font-weight:400}#room-navigation{position:fixed;right:28px;bottom:92px;z-index:1000;display:flex;gap:6px}#room-navigation button{border:1px solid #ffffff25;border-radius:16px;background:#18213199;backdrop-filter:blur(12px);color:#dde1e9;font-size:10px;padding:8px 12px;cursor:pointer}#room-navigation button[aria-current=true]{color:#fff;border-color:#ffffff70}#room-status{position:fixed;left:50%;top:45%;translate:-50% 0;z-index:2000;color:#eee;font-size:12px;background:#101824;padding:15px 24px;border-radius:15px}#room-status[hidden]{display:none}@media(max-width:700px){.language-switch{top:96px}#room-navigation{right:12px;bottom:88px}}

/* One continuous TR2 ambient field behind all four transparent room surfaces. */
#er-ambient{position:fixed;inset:0;overflow:hidden;pointer-events:none;background:#05080e}#er-ambient::before{content:"";position:absolute;inset:-16%;background:radial-gradient(ellipse at 50% 58%,#6480b329 0,#3f557214 24%,transparent 57%),radial-gradient(ellipse at 70% 35%,#a1554520 0,transparent 43%);filter:blur(var(--ambient-field-blur,34px));opacity:var(--ambient-field-opacity,1)}
.ambient-orb { position: absolute; border-radius: 50%; filter: blur(92px); opacity: .3; mix-blend-mode: screen; will-change: transform,opacity; }
.ambient-orb.a { width: 62vw; height: 62vw; left: -14vw; top: -20vw; background: radial-gradient(circle at 58% 58%,#356fc9 0,#413778 34%,transparent 70%); animation: ambient-a 22s ease-in-out infinite alternate; }
.ambient-orb.b { width: 56vw; height: 56vw; right: -13vw; top: -2vh; background: radial-gradient(circle at 42% 46%,#6b3c79 0,#462b60 31%,transparent 70%); animation: ambient-b 27s ease-in-out infinite alternate; }
.ambient-orb.c { width: 52vw; height: 52vw; left: 24vw; bottom: -31vw; background: radial-gradient(circle,#26766c 0,#384f91 38%,transparent 72%); opacity: .27; animation: ambient-c 25s ease-in-out infinite alternate; }

#er-ambient .ambient-orb{will-change:auto}
@keyframes ambient-a{to{transform:translate(5vw,3vh)}}@keyframes ambient-b{to{transform:translate(-4vw,5vh)}}@keyframes ambient-c{to{transform:translate(3vw,-4vh)}}
@media(prefers-reduced-motion:reduce){#er-ambient .ambient-orb{animation:none}}

/* Full viewport physical scene; only the browser viewport bounds its meshes. */
.er-physical-view{position:fixed;inset:0;z-index:3;pointer-events:none;overflow:visible;transform:none}
.er-physical-view[hidden]{display:none}

/* Resting TR3 uses its own book perspective without an outer rotated wall. */
.room-plane.er-front-plane{position:fixed;inset:0;transform:none;transform-style:flat;backface-visibility:visible;z-index:4;pointer-events:auto}

/* Startup shares ER1's world scene; its environment remains visible behind the letters. */
#er-liquid-loader{position:fixed;inset:0;z-index:0;background:transparent;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .45s ease,visibility 0s .45s}
#er-liquid-loader.is-visible{opacity:1;visibility:visible;pointer-events:auto;transition:opacity .45s ease}
#er-liquid-loader.is-room-artwork{z-index:0;pointer-events:none;background:transparent;transition:none}
.has-liquid-intro #room-camera{z-index:1}
#er-liquid-loading{display:block;width:100%;height:100%;border:0;pointer-events:none}
.is-room-loading #room-status{top:auto;bottom:28px;background:transparent;color:#b7bdc8;padding:8px 16px}
.is-room-loading #room-camera,.is-room-loading .room-plane,.is-room-loading .er-physical-view,.is-room-loading #language-switch{visibility:hidden;pointer-events:none}
#er-background-settings{position:fixed;right:28px;bottom:74px;z-index:1100;border:1px solid #ffffff35;border-radius:18px;background:#182131d9;backdrop-filter:blur(12px);color:#edf0f5;font:11px Arial,'PingFang SC',sans-serif;padding:9px 14px;cursor:pointer}
#er-background-settings[aria-expanded=true]{border-color:#a6c9df}
#er-background-drawer{position:fixed;top:24px;right:24px;bottom:116px;width:340px;max-width:calc(100vw - 32px);z-index:1200;background:#191d23;box-shadow:0 14px 60px #0007;border:1px solid #ffffff25;border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
#er-background-drawer[hidden]{display:none}
.er-background-drawer-bar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;border-bottom:1px solid #ffffff20;color:#b6c9d7;font:11px Arial,'PingFang SC',sans-serif;flex:0 0 auto}
.er-background-drawer-bar button{border:1px solid #ffffff30;background:#262d37;color:#e6e8eb;border-radius:7px;padding:6px 10px;cursor:pointer}
.er-background-controls{display:block;width:100%;flex:1;min-height:0;border:0;background:#191d23}
@media(max-width:700px){#er-background-settings{right:12px;bottom:72px}#er-background-drawer{top:14px;right:12px;bottom:116px;width:340px;max-width:calc(100vw - 24px)}}
@media(prefers-reduced-motion:reduce){#er-liquid-loader{transition:none}}

/* This single raster is also sampled by the liquid's reflection/refraction. */
#er-ambient.is-shared-backdrop::before,#er-ambient.is-shared-backdrop .ambient-orb{visibility:hidden}
#er-shared-backdrop{position:absolute;inset:0;width:100%;height:100%;display:block;pointer-events:none}

/* Shared chrome: its horizontal bounds are capped by a 16:9 frame. */
:root{--er-ui-inset:max(20px,calc((100vw - 177.777778vh)/2 + 20px));--er-ui-bottom:max(22px,env(safe-area-inset-bottom));}
#er-shared-footer{position:fixed;inset:auto var(--er-ui-inset) var(--er-ui-bottom);display:flex;align-items:flex-end;justify-content:space-between;gap:24px;z-index:1000;pointer-events:none;color:#c6c8cb;font:11px/1.7 Arial,'PingFang SC',sans-serif;}
#er-interaction-hints{max-width:min(470px,calc(100vw - 140px));letter-spacing:.015em;}
#er-interaction-hints p{margin:0;white-space:normal;}
#er-page-dots{display:flex;align-items:center;gap:4px;pointer-events:auto;flex-shrink:0;}
#er-page-dots button{position:relative;display:block;width:30px;height:30px;padding:0;background:none;border:0;cursor:pointer;border-radius:50%;}
#er-page-dots button::before{content:'';position:absolute;inset:11px;border-radius:50%;background:#c6c8cb;opacity:.3;transition:opacity .28s,transform .28s;}
#er-page-dots button[aria-current=page]::before{opacity:1;transform:scale(1.1);background:#f3eee6;}
#er-page-dots button:hover::before{opacity:.8;}
#er-page-dots button:focus-visible{outline:1px solid #ddd8cd;outline-offset:1px;}
#er-page-title{position:fixed;top:32px;left:50%;transform:translateX(-50%);z-index:1000;pointer-events:none;color:#e8e4dd;font:400 24px Georgia,'Songti SC',serif;letter-spacing:.06em;}
#er-page-title[hidden]{display:none;}
@media(max-width:700px){:root{--er-ui-inset:max(14px,calc((100vw - 177.777778vh)/2 + 14px));--er-ui-bottom:max(18px,env(safe-area-inset-bottom));}#er-shared-footer{gap:8px;font-size:10px;}#er-interaction-hints{max-width:calc(100vw - 150px);}#er-page-dots{gap:0;}#er-page-dots button{width:28px;height:36px;}#er-page-dots button::before{inset:15px 11px;}#er-page-title{top:26px;font-size:22px;}}
.is-room-loading #er-shared-footer,.is-room-loading #er-page-title{visibility:hidden;}

/* One adjustment surface, above shared navigation and below native modal viewers. */
#er-debug-launch{position:fixed;top:max(28px,env(safe-area-inset-top));right:var(--er-ui-inset);z-index:1300;padding:8px 12px;border:1px solid #ffffff22;border-radius:6px;background:#15171bcc;color:#bcb9b3;font:11px Arial,'PingFang SC',sans-serif;cursor:pointer;}
#er-debug-launch:hover,#er-debug-launch[aria-expanded=true]{color:#f1ece3;border-color:#ddd2bf66;}
#er-debug-launch:focus-visible{outline:2px solid #ddd2bf;outline-offset:3px;}
#er-debug-panel{position:fixed;top:72px;right:var(--er-ui-inset);bottom:max(88px,env(safe-area-inset-bottom));width:390px;max-width:calc(100vw - 28px);z-index:1400;display:flex;flex-direction:column;border:1px solid #ffffff20;border-radius:12px;background:#181a1ff5;color:#e3e0da;box-shadow:0 16px 55px #0006;font:13px/1.5 Arial,'PingFang SC',sans-serif;}
#er-debug-panel .er-debug-header{display:flex;align-items:center;gap:12px;padding:14px 16px;border-bottom:1px solid #ffffff16;flex-shrink:0;}
#er-debug-panel .er-debug-header strong{font-weight:500;letter-spacing:.08em;}
#er-debug-panel .er-debug-current{color:#a9a6a0;font-size:11px;flex:1;}
#er-debug-panel .er-debug-header button{border:0;background:none;color:#c7c1b8;font:inherit;cursor:pointer;}
#er-debug-panel .er-debug-content{padding:14px;}
#er-debug-panel #er-spot-controls{position:static;inset:auto;z-index:auto;width:100%;}
#er-debug-panel #er-spot-controls>details{width:100%;box-sizing:border-box;}
@media(max-width:700px){#er-debug-launch{top:max(20px,env(safe-area-inset-top));font-size:10px;}#er-debug-panel{top:64px;bottom:max(86px,env(safe-area-inset-bottom));}#er-page-dots button{width:44px;height:44px;}#er-page-dots button::before{inset:19px;}#er-interaction-hints{max-width:calc(100% - 190px);}}
.is-room-loading #er-debug-launch{visibility:hidden;}
#er-shared-footer[hidden]{display:none!important;}
@media(max-width:700px){#er-debug-launch{min-height:40px;}}

/* All page titles/view choices and languages use one stationary top bar. */
#er-shared-top{position:fixed;top:max(28px,env(safe-area-inset-top));left:50%;transform:translateX(-50%);z-index:1000;display:flex;flex-direction:column;align-items:center;gap:14px;pointer-events:none;font-family:Georgia,'Songti SC','Times New Roman',serif;}
#er-top-views{display:flex;align-items:center;justify-content:center;gap:12px;white-space:nowrap;min-height:36px;pointer-events:auto;}
#er-shared-top .er-top-item{position:relative;display:inline-block;margin:0;padding:4px 7px 8px;border:0;border-bottom:1px solid transparent;background:none;color:#99969c;font:400 18px/1.35 Georgia,'Songti SC','Times New Roman',serif;letter-spacing:.025em;text-decoration:none;transition:color .24s,border-color .24s;}
#er-shared-top button.er-top-item{cursor:pointer;}
#er-shared-top .er-top-item[aria-pressed=true],#er-shared-top .er-top-title{color:#ece8e2;border-bottom-color:#d78063;}
#er-shared-top .er-top-item:hover{color:#ece8e2;}
#er-shared-top .er-top-item:disabled{opacity:.35;cursor:default;}
#er-shared-top .er-top-separator{font:400 14px Georgia,serif;color:#5d5a62;}
#er-shared-top .er-top-item:focus-visible{outline:1px solid #d7cfc4;outline-offset:4px;}
#er-shared-top #language-switch{position:static;top:auto;left:auto;translate:none;display:flex;align-items:center;justify-content:center;gap:10px;min-width:0;margin:0;pointer-events:auto;font:400 11px/1.4 Georgia,'Songti SC','Times New Roman',serif;letter-spacing:.025em;}
#er-shared-top #language-switch button{margin:0;padding:3px 1px 5px;color:#929098;font:inherit;transition:color .24s,border-color .24s;}
#er-shared-top #language-switch button[aria-pressed=true]{color:#ece8e2;border-bottom-color:#d78063;}
#er-shared-top #language-switch span{font:inherit;color:#5d5a62;}
#er-shared-top #er-page-title{position:static;top:auto;left:auto;transform:none;pointer-events:auto;}
@media(max-width:700px){#er-shared-top{top:max(22px,env(safe-area-inset-top));gap:10px;}#er-top-views{gap:8px;min-height:32px;}#er-shared-top .er-top-item{font-size:16px;}#er-shared-top #language-switch{font-size:11px;}}
.is-room-loading #er-shared-top{visibility:hidden;}
@media(prefers-reduced-motion:reduce){#er-shared-top .er-top-item,#er-shared-top #language-switch button{transition:none;}}
#er-debug-launch{font:400 11px/1.4 Georgia,'Songti SC','Times New Roman',serif;letter-spacing:.025em;transition:color .24s,border-color .24s;}
@media(prefers-reduced-motion:reduce){#er-debug-launch{transition:none;}}
#er-shared-top .er-top-item,#er-shared-top #language-switch{ text-shadow:0 1px 5px #000a,0 0 12px #0008; }
#er-touch-tools{position:fixed;left:50%;bottom:max(94px,calc(env(safe-area-inset-bottom) + 76px));transform:translateX(-50%);display:flex;align-items:center;gap:6px;z-index:1100;padding:5px 8px;border:1px solid #ffffff25;border-radius:24px;background:#171a20e8;color:#e5e0d7;font:12px Georgia,'Songti SC',serif;}
#er-touch-tools[hidden]{display:none;}
#er-touch-tools button{min-width:44px;min-height:40px;border:0;border-radius:18px;padding:6px 10px;background:transparent;color:inherit;font:inherit;cursor:pointer;}
#er-touch-tools button:active{background:#ffffff16;}
html[data-input-mode=touch] #er-top-views button{min-height:44px;}
html[data-input-mode=touch] #er-shared-top #language-switch button{min-width:36px;min-height:34px;}
html[data-input-mode=touch] .room-plane[data-room=tr1]{touch-action:none;}
html[data-input-mode=touch] #er-top-views{min-height:44px;}
html[data-input-mode=touch] #er-shared-top .er-top-item{min-height:44px;display:inline-flex;align-items:center;justify-content:center;box-sizing:border-box;}
#er-touch-tools button:disabled{opacity:.35;cursor:default;}
#er-page-dots button[aria-busy=true]::before{opacity:.65;box-shadow:0 0 0 2px #f3eee633;}

.is-room-loading #room-status{display:flex;flex-direction:column;align-items:center;gap:10px;max-width:calc(100vw - 32px);text-align:center;line-height:1.5}
#room-status progress{width:180px;height:2px;border:0;appearance:none;background:#ffffff18;color:#b5becb;border-radius:2px}
#room-status progress::-webkit-progress-bar{background:#ffffff18;border-radius:2px}
#room-status progress::-webkit-progress-value{background:#b5becb;border-radius:2px}
#room-status progress::-moz-progress-bar{background:#b5becb;border-radius:2px}
#room-status button{display:block;margin:12px auto 0;min-height:40px;padding:8px 18px;border:1px solid #ffffff40;border-radius:8px;background:#253341;color:#eef0f1;font:inherit;cursor:pointer}

/* C: the existing liquid forms a name while the actual whole-space preload runs. */
#er-opening{position:fixed;inset:0;z-index:1900;display:flex;flex-direction:column;justify-content:space-between;align-items:center;padding:calc(34px + env(safe-area-inset-top)) 24px calc(26px + env(safe-area-inset-bottom));color:#dededb;touch-action:none;cursor:crosshair;transition:opacity .4s ease;}
#er-opening.is-exiting{opacity:0;pointer-events:none}
.er-opening-heading{text-align:center;pointer-events:none}
.er-opening-heading p{margin:0 0 12px;font:400 18px/1.2 Georgia,'Times New Roman',serif;letter-spacing:.06em}
.er-opening-heading span{font:11px/1.5 Arial,'PingFang SC',sans-serif;letter-spacing:.14em;color:#aaaeb7}
.er-opening-bottom{display:flex;flex-direction:column;align-items:center;gap:15px;width:min(580px,100%);text-align:center}
.er-opening-progress{display:flex;flex-direction:column;align-items:center;gap:13px;font:11px/1.5 Arial,'PingFang SC',sans-serif;color:#b7bbc4}
.er-opening-progress progress{appearance:none;width:160px;height:2px;border:0;border-radius:2px;background:#ffffff18;color:#bdc0c8}
.er-opening-progress progress::-webkit-progress-bar{background:#ffffff18;border-radius:2px}
.er-opening-progress progress::-webkit-progress-value{background:#bdc0c8;border-radius:2px}
.er-opening-progress progress::-moz-progress-bar{background:#bdc0c8;border-radius:2px}
.er-opening-hint{margin:0;color:#949aa8;font:11px/1.6 Arial,'PingFang SC',sans-serif}
.er-opening-actions{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:9px}
.er-opening-actions button{min-height:44px;border:1px solid #ffffff28;border-radius:22px;padding:10px 18px;background:#12141b66;color:#d9d8d4;font:11px/1.3 Arial,'PingFang SC',sans-serif;cursor:pointer;transition:color .2s,background .2s,border-color .2s}
.er-opening-actions button:disabled{opacity:.5;cursor:default}
.er-opening-actions button:hover:not(:disabled){background:#ffffff10;border-color:#ffffff55}
.er-opening-actions button:focus-visible{outline:2px solid #cbc1a9;outline-offset:3px}
.er-opening-actions button[hidden]{display:none}
#er-opening.is-ready [data-opening-enter]{color:#131724;border-color:#d4d5d5;background:#d4d5d5}
.is-room-loading #room-status{visibility:hidden}
@media(max-width:700px){#er-opening{padding:calc(24px + env(safe-area-inset-top)) 16px calc(20px + env(safe-area-inset-bottom))}.er-opening-heading p{font-size:16px}.er-opening-hint{max-width:280px}}
@media(max-height:580px){#er-opening{padding-top:18px;padding-bottom:12px}.er-opening-heading p{margin-bottom:6px}.er-opening-bottom{gap:9px}.er-opening-progress{gap:7px}}
@media(prefers-reduced-motion:reduce){#er-opening,.er-opening-actions button{transition:none}}