:root{color-scheme:dark;font-family:Arial,Helvetica,sans-serif;color:#eeeee7;background:#171918;--gold:#e5b86e;--muted:#9b9f98}*{box-sizing:border-box}body{margin:0;overscroll-behavior:none}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer;border:0;touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:3px}button:disabled{opacity:.3;cursor:default}[hidden]{display:none!important}.app{height:100svh;height:100dvh;min-height:500px;max-width:1400px;margin:auto;display:flex;flex-direction:column;padding:20px max(22px,env(safe-area-inset-right)) max(12px,env(safe-area-inset-bottom)) max(22px,env(safe-area-inset-left))}header{display:flex;align-items:center;gap:22px;padding-bottom:17px}.wordmark{font-size:18px;font-weight:900;letter-spacing:-.6px;color:inherit;text-decoration:none;white-space:nowrap}.wordmark span{font-size:9px;vertical-align:top;margin-left:3px}.revision{font:10px monospace;letter-spacing:1px;color:var(--muted)}.revision i{width:5px;height:5px;display:inline-block;background:var(--gold);border-radius:50%;margin-right:6px}.icon{background:transparent;border:1px solid #54594f;width:32px;height:32px;border-radius:50%;font:17px monospace;flex-shrink:0}#fullscreen{margin-left:auto}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid #3a4038;padding-top:10px}.tabs{display:flex;gap:4px;background:#252b25;border-radius:6px;padding:3px}.tabs button,.tools button{background:none;font:10px monospace;letter-spacing:.4px;padding:10px 12px;border-radius:3px;color:#b9bdb3;white-space:nowrap}.tabs button[aria-pressed=true]{color:#241c0f;background:var(--gold)}.tools{display:flex;gap:3px;align-items:center}.tools button[aria-pressed=true]{background:#e6e8de;color:#1d211b}.tools button:hover{background:#3a4137}.text-button{font:10px monospace;letter-spacing:.3px;background:none;padding:10px;color:#bfc3b8;white-space:nowrap}.arena{flex:1;min-height:0;display:flex;flex-direction:column;position:relative}#viewport{flex:1;position:relative;min-height:0;overflow:hidden;background:radial-gradient(ellipse at 50% 50%,#30372e 0,transparent 70%)}#scene{display:block;width:100%;height:100%;touch-action:none;position:absolute;inset:0}#poster{position:absolute;width:100%;height:100%;object-fit:contain;opacity:.6}#loading{position:absolute;inset:42% 0 auto;text-align:center;font:10px monospace;letter-spacing:1.4px;background:#171918e0;padding:20px}#loading span{display:block;color:var(--gold);margin-top:12px}#model-error{position:absolute;inset:40% 10% auto;text-align:center;line-height:1.8}#model-error button{display:block;margin:16px auto;padding:12px 20px;background:#41483b}#launch{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;white-space:nowrap;background:#171918f0;padding:15px;border-radius:7px;border:1px solid #525b47}#launch p{margin:0 0 10px;font-size:12px;color:#c6c9bf}#start,.primary{background:var(--gold);color:#241d13;font:700 12px monospace;padding:14px 20px;border-radius:3px}#start span{margin-left:30px}#view-tools{position:absolute;bottom:10px;left:50%;transform:translateX(-50%);display:flex;gap:5px;white-space:nowrap}#view-tools button{background:#343a2eea;font:10px monospace;padding:10px;border-radius:4px}.readout{display:flex;align-items:center;justify-content:center;gap:28px;padding:10px 0;border-top:1px solid #30382e;min-height:47px}.readout>div{display:flex;align-items:center;gap:8px}.readout span{font:9px monospace;letter-spacing:1px;color:var(--muted)}.readout strong{font:18px monospace;color:var(--gold);font-weight:400}.readout canvas{display:block;width:48px;height:24px}#status{font:8px monospace;color:#9ba88d;max-width:230px}footer{border-top:1px solid #3b4236}.controls{display:flex;justify-content:space-between;max-width:490px;margin:14px auto 9px;gap:20px}.directions,.actions{display:flex;gap:8px}.controls button{width:64px;height:64px;border:2px solid #b78a46;border-radius:50%;background:#252b24;box-shadow:inset 0 0 0 3px #171c16;user-select:none;touch-action:none;color:var(--gold)}.controls button b{font:24px/1 Arial;display:block;margin-bottom:4px}.controls button span{font:7px monospace;letter-spacing:.6px;color:#c7b88f}.controls button[data-control=down],.controls button[data-control=action]{margin-top:15px}.controls button.pressed{background:#615238;box-shadow:0 0 14px #d9ad6350}.footnote{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:3px}.footnote>span{color:#929c88;font:8px monospace;letter-spacing:.4px}#explore-hint{text-align:center;font:11px monospace;color:#abb59b;padding:14px}#fit-warning{font:11px/1.5 monospace;color:var(--gold);margin:2px 0 5px;text-align:center}dialog{border:1px solid #535d49;border-radius:12px;background:#242b22;color:#eeeee4;padding:28px;max-width:550px;width:calc(100% - 28px);max-height:calc(100dvh - 24px);overflow:auto}dialog::backdrop{background:#070b08cc;backdrop-filter:blur(8px)}dialog h1{font-size:30px;line-height:1.06;letter-spacing:-1px;margin:24px 0 16px}dialog p{font-size:14px;line-height:1.6;color:#c1c9b6}dialog .small{font-size:11px}dialog small{font:9px/1.7 monospace;color:#9da98f}dialog .icon{position:absolute;right:15px;top:15px}dialog .primary{display:inline-block;margin-top:14px}dl{display:grid;grid-template-columns:90px 1fr;gap:14px;font-size:13px}dt{color:var(--gold)}dd{margin:0;color:#c1c7b6}.dialog-actions{display:flex;align-items:center;gap:10px}.dialog-actions button{padding:12px;background:#414936}.dialog-actions .primary{margin:0;background:var(--gold)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.ruler-area{overflow-x:auto;padding:25px 5px 15px;min-height:65px}#calibration-ruler{height:18px;border-top:2px solid var(--gold);position:relative;display:flex;justify-content:space-between;min-width:100px;max-width:none;font:10px monospace;color:var(--gold);padding-top:9px}#calibration-ruler:before,#calibration-ruler:after{content:'';position:absolute;top:-8px;height:14px;width:1px;background:var(--gold)}#calibration-ruler:before{left:0}#calibration-ruler:after{right:0}.calibration-slider{display:flex;gap:15px;align-items:center;margin-top:12px}.calibration-slider input{flex:1;min-width:0;accent-color:var(--gold)}.calibration-slider button{background:#3a4433;border-radius:5px;font-size:20px;width:38px;height:38px}#calibration-value{font:10px monospace;color:var(--muted);display:block;margin-top:10px}
@media(min-width:950px) and (min-height:650px){.app{padding-top:28px}#controls{display:none}.readout{padding:15px 0}}
@media(max-width:600px) and (orientation:portrait){.app{padding: max(14px,env(safe-area-inset-top)) 14px max(8px,env(safe-area-inset-bottom));min-height:520px}header{gap:12px;padding-bottom:10px}.wordmark{font-size:15px}.revision{display:none}#fullscreen{font-size:9px;padding:7px}.toolbar{flex-wrap:wrap;justify-content:center;gap:6px}.tabs{width:100%}.tabs button{flex:1}.tools{width:100%;justify-content:space-between}.tools button{font-size:9px;padding:9px 8px}.readout{gap:13px;flex-wrap:wrap;padding:9px 0}.readout span{font-size:8px}.readout strong{font-size:16px}#status{width:100%;max-width:none;text-align:center}.controls{gap:12px}.directions,.actions{gap:6px}.controls button{width:clamp(43px,13vw,64px);height:clamp(43px,13vw,64px)}.footnote{flex-wrap:wrap}.footnote>span{font-size:7px}#size-status{order:3;width:100%;text-align:center;padding:3px 0 7px}}
@media(orientation:landscape) and (max-height:600px){.app{min-height:250px;padding: max(5px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) max(3px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left))}header{height:29px;padding:0;gap:16px}.wordmark{font-size:14px}.revision{font-size:8px}.icon{width:25px;height:25px;font-size:14px}.text-button{padding:6px 8px;font-size:9px}.toolbar{padding-top:4px;gap:4px}.tabs button,.tools button{font-size:9px;padding:7px 9px}.arena{min-height:0}.readout{min-height:27px;padding:2px 0;gap:22px}.readout strong{font-size:14px}.readout span{font-size:8px}.readout canvas{height:20px;width:40px}#controls{display:none}.footnote{margin:0}.footnote>span{font-size:7px}#explore-hint{display:none}.footnote #hint{display:none}#launch{padding:10px}#launch p{font-size:10px;margin-bottom:6px}#start{padding:10px 17px;font-size:10px}#fit-warning{font-size:9px;margin:0}dialog{max-width:660px;padding:18px 25px}dialog h1{font-size:23px;margin:13px 0 10px}dialog p{font-size:12px;margin:8px 0}.ruler-area{padding-top:17px;min-height:54px}.calibration-slider{margin-top:3px}dialog .small{font-size:10px}dialog .primary{padding:10px;margin-top:7px}}
/* Board-first mode uses the actual visible viewport, including mobile browser-bar changes. */
.app{height:var(--viewport-height,100dvh)}
header{padding-right:90px}
#interface-toggle{position:fixed;z-index:10;right:max(12px,env(safe-area-inset-right));top:max(8px,env(safe-area-inset-top));min-height:40px;padding:0 12px;border-radius:22px;border:1px solid #59624f;background:#20261fed;color:#e3e8da;font:11px monospace;box-shadow:0 2px 10px #0003}
body.compact .app{max-width:none;min-height:0;padding:max(4px,env(safe-area-inset-top)) max(4px,env(safe-area-inset-right)) max(4px,env(safe-area-inset-bottom)) max(4px,env(safe-area-inset-left))}
body.compact header,body.compact .toolbar,body.compact .readout,body.compact footer{display:none}
body.compact .arena,body.compact #viewport{height:100%;min-height:0}
#fit-warning{position:fixed;z-index:11;bottom:max(6px,env(safe-area-inset-bottom));left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:12px;width:max-content;max-width:calc(100% - 30px);padding:9px 12px;border:1px solid #7f6b43;border-radius:8px;background:#20251df5;font:11px/1.4 monospace;text-align:left;margin:0}
#quick-fit{flex-shrink:0;background:var(--gold);color:#241d13;border-radius:4px;padding:10px 12px;font:11px monospace}
/* Credit-card calibration has no scrolling page chrome or ruler requirement. */
#calibration-dialog{inset:0;margin:0;width:100%;max-width:none;height:var(--viewport-height,100dvh);max-height:none;padding:max(10px,env(safe-area-inset-top)) max(12px,env(safe-area-inset-right)) max(10px,env(safe-area-inset-bottom)) max(12px,env(safe-area-inset-left));border:0;border-radius:0;overflow:hidden;background:#171c16}
.calibration-layout{height:100%;display:grid;grid-template-columns:minmax(0,1fr) 180px;gap:16px}
#calibration-stage{display:flex;align-items:center;justify-content:center;min-width:0;min-height:0;position:relative;overflow:hidden}
#calibration-card{flex:none;box-sizing:border-box;border:2px solid var(--gold);background:linear-gradient(135deg,#313b2b,#20271d);position:relative;box-shadow:0 0 0 1px #e5b86e44}
#calibration-card .card-chip{position:absolute;left:12%;top:20%;width:13%;height:18%;border:1px solid #a68d59;border-radius:5px;background:linear-gradient(90deg,transparent 32%,#a68d59 33%,transparent 34%,transparent 66%,#a68d59 67%,transparent 68%)}
.card-caption{position:absolute;left:12%;bottom:28%;font:10px monospace;letter-spacing:1px;color:#cfbc91}
.card-dimensions{position:absolute;left:12%;bottom:16%;font:12px monospace;color:var(--gold)}
.calibration-panel{position:relative;align-self:center;padding-top:35px}
#calibration-dialog .close-calibration{top:0;right:0;width:36px;height:36px}
#calibration-dialog h1{font-size:23px;line-height:1.1;margin:10px 0}
#calibration-dialog p{font-size:12px;line-height:1.45;margin:10px 0}
#calibration-dialog .small{font-size:10px;color:#9da98f}
#calibration-dialog .calibration-slider{gap:6px;margin-top:15px}
#calibration-dialog .calibration-slider button{width:34px;height:38px;flex-shrink:0}
#calibration-dialog .primary{width:100%;margin-top:12px;padding:12px 8px;font-size:11px}
#calibration-dialog #fit-size{width:100%;padding:10px 0}
#calibration-value{font-size:9px;line-height:1.4;margin-top:7px}
#calibration-overflow{position:absolute;bottom:0;left:0;right:0;text-align:center;background:#171c16ed;padding:8px;color:var(--gold)}
#calibration-stage.card-clipped{align-items:flex-start;padding-top:8px}
@media(orientation:landscape) and (max-height:600px){header{height:42px}.calibration-panel{padding-top:30px}#calibration-dialog .small{font-size:9px;margin:4px 0}#calibration-dialog h1{font-size:20px;margin:6px 0}#calibration-dialog p{font-size:11px;margin:6px 0}#calibration-dialog .calibration-slider{margin-top:8px}#calibration-dialog .primary{margin-top:8px}#calibration-dialog #fit-size{padding:8px 0}}
@media(orientation:portrait){.calibration-layout{grid-template-columns:1fr;grid-template-rows:minmax(150px,1fr) auto;gap:8px}.calibration-panel{width:min(380px,100%);justify-self:center;padding-top:0;padding-right:0}#calibration-dialog .close-calibration{position:fixed;right:max(12px,env(safe-area-inset-right));top:max(10px,env(safe-area-inset-top))}#calibration-dialog h1{font-size:23px}#calibration-dialog .small{font-size:10px}#calibration-dialog .calibration-slider{margin-top:8px}}
@media(max-height:330px) and (orientation:landscape){.calibration-layout{grid-template-columns:minmax(0,1fr) 190px;gap:8px}#calibration-dialog .small{display:none}.calibration-panel{padding-top:30px}#calibration-dialog h1{font-size:18px}#calibration-dialog p{font-size:10px}#calibration-dialog .primary{margin-top:6px;padding:10px}#calibration-value{margin-top:4px}}

.board-label{display:block;padding:10px 12px;font-size:11px;letter-spacing:.08em;white-space:nowrap}

.controls b svg{display:block;width:1.6rem;height:1.6rem;margin:auto}
/* Rotate the board itself, so portrait-locked phones retain native touch coordinates. */
#rotate-view{position:fixed;z-index:10;left:max(12px,env(safe-area-inset-left));top:max(8px,env(safe-area-inset-top));min-height:40px;padding:0 12px;border-radius:22px;border:1px solid #59624f;background:#20261fed;color:#e3e8da;font:11px monospace;box-shadow:0 2px 10px #0003}
#rotate-view[aria-pressed=true]{border-color:var(--gold);color:var(--gold)}
body:not(.compact) .app{padding-top:calc(56px + env(safe-area-inset-top))}
body.view-rotated #launch{transform:translate(-50%,-50%) rotate(90deg)}
@media(orientation:portrait){body.compact.view-rotated .app{padding-top:max(56px,env(safe-area-inset-top))}}

/* One playable 3D board, with optional controls and a quiet signup invitation. */
.toolbar{justify-content:flex-end}
#controls{display:none}
.signup-cta{display:block;margin:8px auto 0;padding:12px 18px;border:1px solid #8f794f;border-radius:6px;background:#242720;color:var(--gold);font:12px/1.4 Arial,Helvetica,sans-serif}
.signup-cta:hover{background:#34362b;border-color:var(--gold)}
.signup-cta span{margin-left:12px}
#explore-hint{padding:10px;font-size:10px}
@media(max-width:600px){.signup-cta{font-size:11px;margin-top:5px;padding:10px 12px}.app{min-height:0}.footnote #hint{display:none}}
@media(orientation:landscape) and (max-height:600px){.signup-cta{padding:6px 12px;margin:3px auto;font-size:10px}}

.signup-cta{flex-shrink:0}
body.compact .signup-cta{margin:4px auto;padding:8px 12px;font-size:10px;background:#20261fed}
body.compact .arena{height:auto;flex:1}

.signup-cta{text-decoration:none;text-align:center}