.classic-game{max-width:780px;margin:auto}.classic-start{max-width:520px;margin:auto;display:flex;flex-direction:column;gap:16px;align-items:stretch;text-align:center}.classic-start>img{align-self:center;object-fit:cover;border-radius:24px;box-shadow:0 16px 36px #0006}.classic-start h1{margin:0}.classic-start .opponent-choices{display:grid;grid-template-columns:1fr 1fr}.classic-start .opponent-choices button{min-width:0;white-space:normal;height:auto;min-height:60px;padding:12px;font-size:1rem}.classic-players{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:8px 0}.classic-player{border:1px solid var(--line);border-radius:16px;padding:10px 12px;display:grid;grid-template-columns:28px 1fr;align-items:center;gap:8px;background:var(--surface);min-width:0}.classic-player strong{font-size:1rem;overflow-wrap:anywhere;color:var(--player)}.classic-player small{grid-column:2;font-size:.875rem;color:var(--muted)}.classic-player.current{border-color:var(--player);box-shadow:inset 0 0 18px #fff1}.classic-token,.bg-checker,.bg-bar-count{border-radius:50%;background:radial-gradient(circle at 35% 25%,#fffbed,#e6c993 70%,#b78b43);border:2px solid #ffedc5;box-shadow:inset 0 -3px 5px #855c3866,0 3px 5px #0008}.classic-token{width:26px;height:26px}.classic-token.dark,.bg-checker.dark,.bg-bar-count.dark{background:radial-gradient(circle at 35% 25%,#ac85e9,#573080 70%,#29143e);border-color:#bc91ea;color:#fff}.classic-status{text-align:center;color:var(--lime);min-height:26px;margin:12px 0;font-size:1rem}.chess-frame{padding:12px;border-radius:20px;background:linear-gradient(145deg,#926b44,#412923 45%,#a27a4c);box-shadow:0 12px 30px #0008,inset 0 0 0 1px #d1ae6b;max-width:560px;margin:auto}.chess-board{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));border:2px solid #35201e;aspect-ratio:1;border-radius:8px;overflow:hidden}.chess-square{border:0;border-radius:0;padding:0;min-width:0;min-height:0;background:#e9d5b1;color:#40282d;position:relative;display:grid;place-items:center;aspect-ratio:1}.chess-square.dark-square{background:#5b425b;color:#f7e5c5}.chess-square:disabled{opacity:1;cursor:default}.chess-square.last-move{background:#b4b775}.chess-square.dark-square.last-move{background:#777955}.chess-square.chosen{box-shadow:inset 0 0 0 3px var(--lime);background:#889c62}.chess-piece{font-family:'DejaVu Sans','Arial Unicode MS',serif;font-size:clamp(25px,7.7vw,56px);line-height:1;position:relative;z-index:2;filter:drop-shadow(0 2px 1px #0006)}.light-piece{color:#fff8e9;-webkit-text-stroke:1px #6f5131;text-shadow:0 1px #795129}.dark-piece{color:#211a31;-webkit-text-stroke:.6px #c7a2f0;text-shadow:0 1px #9c6ac4}.chess-square small{position:absolute;font-size:12px;line-height:1;font-weight:700;z-index:3}.rank-label{top:3px;left:3px}.file-label{bottom:3px;right:3px}.move-marker{width:22%;height:22%;border-radius:50%;background:#192a1980;position:absolute;z-index:3;pointer-events:none}.chess-square:has(.chess-piece).destination{box-shadow:inset 0 0 0 3px var(--lime)}.chess-square:has(.chess-piece) .move-marker{display:none}.classic-tools{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:14px}.classic-tools>span{font-size:.875rem;color:var(--muted)}.classic-tools button{font-size:.875rem;padding:9px 12px;white-space:nowrap}.chess-moves{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0;font-size:.875rem;color:var(--muted)}.chess-moves span{padding:4px 8px;border-radius:7px;background:var(--surface)}.promotion-picker{position:fixed;z-index:150;top:50%;left:50%;transform:translate(-50%,-50%);width:min(92vw,380px);background:var(--surface);padding:20px;border:2px solid var(--lime);border-radius:20px;box-shadow:0 0 0 100vmax #080612bb;display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.promotion-picker strong{grid-column:1/-1}.promotion-picker button{font-size:40px;background:#e9d5b1;color:#241b35;padding:5px;min-width:0}.bg-frame{position:relative;aspect-ratio:1.4;max-width:760px;border:10px solid #77523d;border-radius:18px;background:#bd946b;box-shadow:0 12px 30px #0008,inset 0 0 0 3px #e4bb78;overflow:hidden;display:grid;grid-template-rows:1fr 1fr;padding:3px}.bg-half{display:grid;grid-template-columns:repeat(6,1fr) 22px repeat(6,1fr);gap:2px}.bg-half>.bg-point:nth-child(7){grid-column:8}.bg-point{position:relative;min-width:0;padding:0;border:0;border-radius:0;background:transparent;overflow:visible}.bg-point::before{content:'';position:absolute;inset:0 0 4%;background:#4b2947;clip-path:polygon(0 0,100% 0,50% 100%)}.bg-point.gold-point::before{background:#dfbc80}.bg-point.bottom::before{transform:rotate(180deg)}.bg-point small{position:absolute;top:3px;left:50%;transform:translateX(-50%);font-size:12px;color:#fff2da;text-shadow:0 1px 2px #000;z-index:5}.bg-point.bottom small{top:auto;bottom:3px}.bg-point:disabled{opacity:1}.bg-stack{position:absolute;inset:18px 0 0}.bg-point.bottom .bg-stack{inset:0 0 18px}.bg-checker{position:absolute;width:94%;aspect-ratio:1;left:3%;top:calc(var(--index)*15%);z-index:3;display:grid;place-items:center;font-style:normal;font-weight:bold;font-size:14px}.bg-point.bottom .bg-checker{top:auto;bottom:calc(var(--index)*15%)}.bg-point.source::after{content:'';position:absolute;width:7px;height:7px;border-radius:50%;background:var(--lime);left:calc(50% - 3px);top:48%;z-index:6}.bg-point.chosen{background:#dbfa8455}.bg-point.destination{background:#dbfa8466;box-shadow:inset 0 0 0 2px var(--lime);border-radius:8px}.bg-bar{position:absolute;z-index:8;left:calc(50% - 11px);top:0;bottom:0;width:22px;padding:0;background:linear-gradient(90deg,#442623,#805044,#442623);border:0;border-radius:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px}.bg-bar>span{font-size:12px;color:#fff3d4;writing-mode:vertical-rl}.bg-bar-count{display:grid;place-items:center;width:23px;height:23px;font-size:12px;color:#30201d}.bg-bar.chosen{outline:2px solid var(--lime)}.bg-center{position:absolute;z-index:7;top:calc(50% - 18px);left:12%;display:flex;gap:8px;pointer-events:none}.classic-die{font-size:34px;line-height:1;color:#fff2da;filter:drop-shadow(0 2px 2px #0008)}.bg-controls{display:flex;justify-content:center;gap:12px;align-items:center;margin:16px 0 6px;flex-wrap:wrap}.bg-dice{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.bg-dice>span{font-size:.875rem;color:var(--muted);flex-basis:100%}.bg-dice button{font-size:32px;line-height:1;padding:5px 8px;background:var(--raised);border:1px solid var(--line)}.bg-dice button.selected{background:var(--lime);color:var(--bg)}.bg-bearoff.ready{border-color:var(--lime);color:var(--lime)}.classic-help{text-align:center;color:var(--muted);font-size:.875rem}.classic-game .game-bottom{position:static;flex-wrap:wrap;margin-top:16px}.classic-game .game-bottom button{min-width:0;padding:12px 16px;font-size:.95rem}.classic-game .game-bottom [data-game-action="home"]{background:#772d45;color:#fff0f0;border-color:#b44d65}@media(max-width:500px){.bg-frame{border-width:7px;aspect-ratio:1.2}.bg-half{gap:0;grid-template-columns:repeat(6,1fr) 18px repeat(6,1fr)}.bg-bar{width:18px;left:calc(50% - 9px)}.bg-checker{border-width:1px;font-size:12px}.chess-frame{padding:8px}.classic-tools{flex-wrap:wrap}.classic-player{padding:9px 8px;grid-template-columns:22px 1fr}.classic-token{width:22px;height:22px}}@media(orientation:landscape) and (max-height:600px){body.game-active main[data-game="chess"],body.game-active main[data-game="backgammon"]{overflow:auto;height:100dvh;padding:6px 12px}.classic-game{display:grid;grid-template-columns:minmax(0,1fr) 220px;column-gap:18px;max-width:1000px}.classic-game .board-heading{grid-column:2;grid-row:1;margin:0}.classic-game .board-heading h1{font-size:22px}.classic-players{grid-column:2;grid-row:2;grid-template-columns:1fr;gap:5px}.classic-status{grid-column:2;grid-row:3;margin:3px 0}.classic-playarea{grid-column:1;grid-row:1/6;min-width:0}.chess-frame{max-width:min(100%,calc(100dvh - 84px));padding:5px}.chess-piece{font-size:clamp(20px,7vh,42px)}.chess-moves{display:none}.classic-tools{margin-top:6px}.bg-frame{max-height:calc(100dvh - 95px);width:auto;aspect-ratio:1.65;margin:auto}.bg-controls{margin:5px 0;gap:6px}.bg-controls button{padding:6px 10px;font-size:14px}.bg-dice>span{display:none}.bg-dice button{font-size:26px}.classic-help{margin:2px}.classic-game .game-bottom{grid-column:2;grid-row:4;gap:5px;margin:3px 0}.classic-game .game-bottom button{padding:7px 9px}.classic-start{grid-column:1/-1;display:grid;grid-template-columns:140px 1fr}.classic-start img{grid-row:1/5;width:140px;height:140px}.classic-start h1{font-size:24px}.classic-start .opponent-choices button{min-height:44px}.classic-start>button{padding:8px}.classic-start .bot-difficulty{grid-column:2}.classic-player small{font-size:12px}.classic-player strong{font-size:14px}.classic-status{font-size:14px}}
#confirm:open{max-height:calc(100dvh - 40px);overflow-y:auto}.classic-start .selected{background:var(--lime);color:var(--bg)}.classic-start .bot-difficulty{margin:0}.classic-start .bot-difficulty button{font-size:1rem;min-width:0}
.classic-clock{position:relative;display:flex;align-items:center;justify-content:center;gap:10px;padding:9px 16px 13px;background:var(--raised);border:1px solid var(--line);border-radius:14px;margin:0 0 14px;overflow:hidden;color:var(--muted);font-size:.875rem}.classic-clock strong{font-variant-numeric:tabular-nums;color:var(--lime);font-size:1.5rem;line-height:1}.classic-clock i{position:absolute;left:0;bottom:0;height:3px;width:var(--remaining);background:var(--lime);transition:width .1s linear}.classic-clock.urgent{border-color:#ff7b90;color:#ffb8c4}.classic-clock.urgent strong{color:#ff7b90}.classic-clock.urgent i{background:#ff7b90}.classic-die.rolling{display:inline-block;animation:classic-dice-roll .28s linear infinite;transform-origin:center;color:var(--lime);text-shadow:0 0 14px #dbfa8455}.classic-die.rolling:nth-child(2){animation-direction:reverse;animation-delay:-.1s}.dice-rolling-notice{font-weight:700;color:var(--lime);padding:9px;min-height:42px}@keyframes classic-dice-roll{0%{transform:rotate(0deg) scale(.85) translateY(0)}50%{transform:rotate(180deg) scale(1.1) translateY(-5px)}100%{transform:rotate(360deg) scale(.85) translateY(0)}}@media(prefers-reduced-motion:reduce){.classic-die.rolling{animation:none}.classic-clock i{transition:none}}@media(orientation:landscape) and (max-height:600px){.classic-game:has(.classic-clock) .classic-clock{grid-column:2;grid-row:4;padding:6px 10px 10px;margin:3px 0;font-size:12px}.classic-game:has(.classic-clock) .game-bottom{grid-row:5}.classic-clock strong{font-size:1.25rem}}
/* Keep the touch board stable; zoom remains available outside the play surface. */
#main[data-game="backgammon"] .bg-frame,#main[data-game="backgammon"] .bg-frame *,#main[data-game="backgammon"] .bg-controls,#main[data-game="backgammon"] .bg-controls *{touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
#main[data-game="backgammon"] .bg-frame{flex-shrink:0;transform:none}
#main[data-game="chess"] .chess-frame,#main[data-game="chess"] .chess-frame *,#main[data-game="chess"] .classic-tools,#main[data-game="chess"] .classic-tools *,#main[data-game="chess"] .promotion-picker,#main[data-game="chess"] .promotion-picker *{touch-action:none;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
#main[data-game="chess"] .chess-frame{flex-shrink:0;transform:none}
/* Board geometry must not depend on the width or height of turn controls. */
#main[data-game="backgammon"],#main[data-game="chess"]{overflow-anchor:none}
#main[data-game="backgammon"] .classic-game,#main[data-game="chess"] .classic-game{display:flex;flex-direction:column;align-items:stretch;justify-content:flex-start;flex:0 0 auto;height:auto;margin:0 auto;width:100%;max-width:780px}
#main[data-game="backgammon"] .classic-playarea,#main[data-game="chess"] .classic-playarea{width:100%;min-width:0;flex:0 0 auto;overflow-anchor:none}
#main[data-game="backgammon"] .bg-frame{width:100%;height:auto;max-height:none;box-sizing:border-box}
#main[data-game="chess"] .chess-frame{width:100%;height:auto;box-sizing:border-box}
#main[data-game="backgammon"] .classic-status,#main[data-game="chess"] .classic-status{min-height:48px;display:flex;align-items:center;justify-content:center;margin:4px 0;flex-wrap:wrap}
#main[data-game="backgammon"] .bg-controls{display:grid;grid-template-columns:minmax(150px,1fr) minmax(96px,.85fr);grid-template-rows:68px 36px;align-items:center;gap:8px;margin:12px 0 6px;min-height:112px}
#main[data-game="backgammon"] .bg-dice{display:grid;grid-template-columns:repeat(4,34px);gap:6px;width:154px;min-height:64px;align-content:center}
#main[data-game="backgammon"] .bg-dice>span{grid-column:1/-1;display:block;white-space:nowrap;font-size:14px}
#main[data-game="backgammon"] .bg-dice button{width:34px;height:38px;font-size:28px;padding:3px;min-width:0}
#main[data-game="backgammon"] .bg-controls>[data-classic="roll"],#main[data-game="backgammon"] .dice-rolling-notice{grid-column:1;grid-row:1;width:100%;min-width:0;min-height:54px;display:flex;align-items:center;justify-content:center;padding:8px;font-size:16px}
#main[data-game="backgammon"] .bg-bearoff{grid-column:2;grid-row:1;width:100%;min-width:0;min-height:54px;font-size:14px;padding:8px;white-space:normal}
#main[data-game="backgammon"] .bg-pass-slot{grid-column:1/-1;grid-row:2;min-height:36px;display:flex;justify-content:center;align-items:center}
#main[data-game="backgammon"] .bg-pass-slot button{font-size:14px;min-height:36px;padding:6px 12px;width:100%}
#main[data-game="backgammon"] .classic-help{min-height:42px;display:flex;align-items:center;justify-content:center;margin:0;font-size:14px}
#main[data-game="chess"] .chess-moves{min-height:34px}
body.game-active:has(#main[data-game="backgammon"] .classic-playarea) .shell,body.game-active:has(#main[data-game="chess"] .classic-playarea) .shell{height:100svh}
@media(orientation:landscape) and (max-height:600px){
 body.game-active:has(#main[data-game="backgammon"] .classic-playarea),body.game-active:has(#main[data-game="chess"] .classic-playarea){height:100svh}
 body.game-active #main[data-game="backgammon"],body.game-active #main[data-game="chess"]{height:100%;overflow:auto;justify-content:flex-start}
 #main[data-game="backgammon"] .classic-game,#main[data-game="chess"] .classic-game{display:grid;grid-template-columns:minmax(0,1fr) 220px;grid-template-rows:auto auto auto auto auto;align-items:start;gap:6px 18px;max-width:1000px;height:auto;flex:0 0 auto}
 #main[data-game="backgammon"] .classic-playarea,#main[data-game="chess"] .classic-playarea{grid-column:1;grid-row:1/6}
 #main[data-game="backgammon"] .bg-frame{width:min(100%,calc((100svh - 155px)*1.65));aspect-ratio:1.65;max-height:none;margin:0 auto}
 #main[data-game="chess"] .chess-frame{width:min(100%,calc(100svh - 85px));max-width:560px;margin:0 auto}
 #main[data-game="backgammon"] .bg-controls{grid-template-columns:minmax(150px,1fr) minmax(96px,.85fr);grid-template-rows:46px 28px;min-height:80px;margin:4px 0;gap:4px 8px}
 #main[data-game="backgammon"] .bg-dice{min-height:38px}
 #main[data-game="backgammon"] .bg-dice>span{display:none}
 #main[data-game="backgammon"] .bg-controls>[data-classic="roll"],#main[data-game="backgammon"] .dice-rolling-notice,#main[data-game="backgammon"] .bg-bearoff{min-height:38px;font-size:14px;padding:5px}
 #main[data-game="backgammon"] .bg-pass-slot,#main[data-game="backgammon"] .bg-pass-slot button{min-height:28px;font-size:13px;padding:2px 8px}
 #main[data-game="backgammon"] .classic-help{min-height:26px;font-size:12px}
 #main[data-game="backgammon"] .classic-status,#main[data-game="chess"] .classic-status{min-height:40px;margin:0}
}
/* Functional 3D dice, with six dotted faces rather than font glyphs. */
.real-die{--size:34px;--half:17px;display:inline-block;width:var(--size);height:var(--size);perspective:220px;vertical-align:middle;margin:5px 7px;filter:drop-shadow(0 5px 3px #0007)}
.die-cube{position:relative;display:block;width:100%;height:100%;transform-style:preserve-3d;transform:rotateX(-19deg) rotateY(-24deg) rotateZ(-5deg)}
.die-side{position:absolute;inset:0;display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(3,1fr);gap:2px;padding:6px;border-radius:6px;border:1px solid #d7b987;background:linear-gradient(145deg,#fffdf2,#e5cda6);box-shadow:inset 0 1px 2px #fff,inset 0 -2px 3px #99724244;backface-visibility:hidden}
.die-pip{display:block;align-self:center;justify-self:center;width:5px;height:5px;border-radius:50%;background:#34262f;box-shadow:inset 0 1px 2px #000b,0 1px 1px #fff9;visibility:hidden}
.die-pip.visible{visibility:visible}
.die-front{transform:translateZ(var(--half))}.die-back{transform:rotateY(180deg) translateZ(var(--half))}.die-right{transform:rotateY(90deg) translateZ(var(--half));background:linear-gradient(145deg,#e8d4b0,#baa078)}.die-left{transform:rotateY(-90deg) translateZ(var(--half))}.die-top{transform:rotateX(90deg) translateZ(var(--half));background:#fff7e3}.die-bottom{transform:rotateX(-90deg) translateZ(var(--half))}
.real-die.rolling .die-cube{animation:real-dice-tumble 1.1s ease-out infinite}.classic-die:nth-child(2) .real-die.rolling .die-cube{animation-direction:reverse;animation-delay:-.12s}
.real-die.small{--size:22px;--half:11px;margin:0;perspective:120px;filter:drop-shadow(0 2px 1px #0004)}.real-die.small .die-side{padding:4px;gap:1px;border-radius:4px}.real-die.small .die-pip{width:3px;height:3px}
.bg-center{top:calc(50% - 22px);left:12%;gap:8px}.classic-die{font-size:initial;line-height:1;filter:none;display:block}.bg-dice button{display:grid;place-items:center}.bg-dice button:disabled{opacity:1}.bg-dice button.selected{outline:2px solid var(--lime);outline-offset:2px}
@keyframes real-dice-tumble{0%{transform:rotateX(-19deg) rotateY(-24deg) rotateZ(-5deg)}25%{transform:rotateX(160deg) rotateY(240deg) rotateZ(55deg)}65%{transform:rotateX(530deg) rotateY(670deg) rotateZ(-30deg)}100%{transform:rotateX(701deg) rotateY(1056deg) rotateZ(-5deg)}}
@media(prefers-reduced-motion:reduce){.real-die.rolling .die-cube{animation:none}}
/* A throw travels over the board, bounces, then rests at its landing position. */
.bg-center.dice-cast{position:absolute;inset:0;display:block;pointer-events:none;z-index:9}
.dice-cast .thrown-die{position:absolute;left:22%;top:calc(50% - 17px);width:34px;height:34px;transform:rotate(var(--land-angle));filter:drop-shadow(0 3px 2px #0008)}
.dice-cast .thrown-die:nth-child(2){left:37%;top:calc(50% - 10px)}
.dice-cast .real-die{margin:0;filter:none}
.dice-cast.casting .thrown-die{animation:board-dice-throw 1.1s cubic-bezier(.2,.6,.35,1) both}
.dice-cast.casting .thrown-die:nth-child(2){animation-duration:1.04s;animation-delay:.06s}
.dice-cast .real-die.rolling .die-cube{animation:board-dice-spin 1.1s ease-out both}
.dice-cast .thrown-die:nth-child(2) .real-die.rolling .die-cube{animation:board-dice-spin-second 1.04s .06s ease-out both}
@keyframes board-dice-throw{
 0%{transform:translate(var(--cast-x),var(--cast-y)) rotate(-140deg) scale(.75);filter:drop-shadow(0 20px 12px #0003)}
 24%{transform:translate(190%,-120%) rotate(110deg) scale(1.12);filter:drop-shadow(0 24px 9px #0004)}
 46%{transform:translate(80%,20%) rotate(220deg) scale(.94);filter:drop-shadow(0 2px 1px #0009)}
 61%{transform:translate(35%,-55%) rotate(300deg) scale(1.04);filter:drop-shadow(0 12px 6px #0005)}
 76%{transform:translate(12%,5%) rotate(350deg) scale(.98);filter:drop-shadow(0 2px 1px #0008)}
 87%{transform:translate(3%,-12%) rotate(calc(360deg + var(--land-angle)));filter:drop-shadow(0 5px 3px #0006)}
 100%{transform:translate(0,0) rotate(calc(360deg + var(--land-angle))) scale(1);filter:drop-shadow(0 3px 2px #0008)}
}
@keyframes board-dice-spin{
 0%{transform:rotateX(180deg) rotateY(90deg) rotateZ(40deg)}
 30%{transform:rotateX(400deg) rotateY(430deg) rotateZ(-30deg)}
 65%{transform:rotateX(650deg) rotateY(940deg) rotateZ(15deg)}
 85%{transform:rotateX(730deg) rotateY(1040deg) rotateZ(-8deg)}
 100%{transform:rotateX(701deg) rotateY(1056deg) rotateZ(-5deg)}
}
@keyframes board-dice-spin-second{
 0%{transform:rotateX(90deg) rotateY(-180deg) rotateZ(-45deg)}
 35%{transform:rotateX(-290deg) rotateY(-460deg) rotateZ(30deg)}
 70%{transform:rotateX(-650deg) rotateY(-1020deg) rotateZ(-18deg)}
 88%{transform:rotateX(-755deg) rotateY(-1110deg) rotateZ(5deg)}
 100%{transform:rotateX(-739deg) rotateY(-1104deg) rotateZ(-5deg)}
}
@media(prefers-reduced-motion:reduce){.dice-cast.casting .thrown-die,.dice-cast .real-die.rolling .die-cube,.dice-cast .thrown-die:nth-child(2) .real-die.rolling .die-cube{animation:none}}
/* Landscape Backgammon: full board with a narrow turn and dice rail. */
@media(orientation:landscape){
 body.game-active #main[data-game="backgammon"]{height:100%;overflow:hidden}
 body.game-active #main[data-game="backgammon"] .classic-game:has(.bg-frame){display:grid;grid-template-columns:minmax(0,1fr) clamp(110px,15vw,150px);grid-template-rows:auto minmax(0,1fr);gap:8px;height:100%;max-width:none;width:100%;min-height:0;margin:0;align-items:stretch}
 body.game-active #main[data-game="backgammon"] .classic-playarea{display:contents}
 body.game-active #main[data-game="backgammon"] .bg-frame{grid-column:1;grid-row:1/-1;width:100%;height:100%;max-width:none;max-height:none;aspect-ratio:auto;margin:0;border-width:6px;container-type:size;min-height:0}
 body.game-active #main[data-game="backgammon"] .bg-checker{width:min(94%,12cqh);height:auto;aspect-ratio:1;left:50%;transform:translateX(-50%)}
 body.game-active #main[data-game="backgammon"] .board-heading,
 body.game-active #main[data-game="backgammon"] .classic-players,
 body.game-active #main[data-game="backgammon"] .classic-clock,
 body.game-active #main[data-game="backgammon"] .classic-help,
 body.game-active #main[data-game="backgammon"] .game-bottom,
 body.game-active #main[data-game="backgammon"] #online-notice{display:none!important}
 body.game-active #main[data-game="backgammon"] .classic-status{grid-column:2;grid-row:1;min-height:36px;font-size:12px;line-height:1.35;margin:0;padding:4px;overflow-wrap:anywhere;align-self:start}
 body.game-active #main[data-game="backgammon"] .bg-controls{grid-column:2;grid-row:2;display:flex;flex-direction:column;align-self:center;justify-content:center;gap:10px;margin:0;min-height:0;min-width:0;width:100%}
 body.game-active #main[data-game="backgammon"] .bg-dice{display:grid;grid-template-columns:repeat(2,34px);grid-auto-rows:38px;gap:6px;justify-content:center;min-height:0;width:100%;height:auto}
 body.game-active #main[data-game="backgammon"] .bg-dice>span{display:none}
 body.game-active #main[data-game="backgammon"] .bg-controls button{font-size:12px;min-height:38px;padding:6px;white-space:normal;width:100%}
 body.game-active #main[data-game="backgammon"] .bg-bearoff{min-height:38px}
 body.game-active #main[data-game="backgammon"] .bg-pass-slot{min-height:0;padding:0}
 body.game-active #main[data-game="backgammon"] .bg-pass-slot:empty{display:none}
}
/* Flat dice show exactly one result face. The throw remains animated. */
#main[data-game="backgammon"] .real-die{perspective:none}
#main[data-game="backgammon"] .die-cube{transform:none!important;transform-style:flat;animation:none!important}
#main[data-game="backgammon"] .die-side:not(.die-front){display:none}
#main[data-game="backgammon"] .die-front{transform:none;backface-visibility:visible;box-shadow:inset 0 1px 2px #fff,0 2px 4px #0005}
#main[data-game="backgammon"] .bg-point.last-destination{box-shadow:inset 0 0 0 3px #fff0cd99;background:#fff0cd22}
/* Explicit half placement prevents intrinsic grid rows from hiding the top. */
@media(orientation:landscape){
 body.game-active #main[data-game="backgammon"] .bg-frame{display:block}
 body.game-active #main[data-game="backgammon"] .bg-half{position:absolute;left:3px;right:3px;height:calc(50% - 6px);min-height:0;grid-template-rows:minmax(0,1fr)}
 body.game-active #main[data-game="backgammon"] .bg-top{top:3px;bottom:auto}
 body.game-active #main[data-game="backgammon"] .bg-bottom{bottom:3px;top:auto}
 body.game-active #main[data-game="backgammon"] .bg-point{height:100%;min-height:0}
}
/* Size the landscape board directly from the visible viewport. */
@media(orientation:landscape){
 body.game-active #main[data-game="backgammon"]:has(.bg-frame){position:fixed;inset:max(6px,env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) max(6px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));width:auto;height:auto!important;min-height:0;padding:0!important;overflow:hidden;display:block;margin:0;max-width:none}
 body.game-active #main[data-game="backgammon"] .classic-game:has(.bg-frame){height:100%;min-height:0;grid-template-columns:minmax(0,1fr) clamp(110px,15vw,150px);grid-template-rows:auto minmax(0,1fr);padding:6px;border:5px solid #77523d;border-radius:18px;background:linear-gradient(90deg,#bd946b,#634531);box-sizing:border-box;overflow:hidden}
 body.game-active #main[data-game="backgammon"] .bg-frame{position:relative;height:100%!important;min-height:0;max-height:100%;width:100%;grid-row:1/3;border:0;border-radius:10px;box-sizing:border-box;overflow:hidden}
 body.game-active #main[data-game="backgammon"] .bg-half{position:absolute!important;left:3px;right:3px;height:calc(50% - 6px)!important;min-height:0;max-height:50%;margin:0;padding:0;box-sizing:border-box}
 body.game-active #main[data-game="backgammon"] .bg-half.bg-top{top:3px!important;bottom:auto!important}
 body.game-active #main[data-game="backgammon"] .bg-half.bg-bottom{top:auto!important;bottom:3px!important}
 body.game-active #main[data-game="backgammon"] .bg-point.bg-point-top{height:100%;min-height:0;padding:0;display:block;border:0;margin:0}
 body.game-active #main[data-game="backgammon"] .classic-status{color:#fff0cd}
 body.game-active #main[data-game="backgammon"] .bg-controls{padding:4px}
}
/* Wide landscape Chess with a compact information rail. */
@media(orientation:landscape){
 body.game-active #main[data-game="chess"]:has(.chess-frame){position:fixed;inset:max(6px,env(safe-area-inset-top)) max(8px,env(safe-area-inset-right)) max(6px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));height:auto!important;width:auto;min-height:0;max-width:none;padding:0!important;margin:0;overflow:hidden;display:block}
 body.game-active #main[data-game="chess"] .classic-game:has(.chess-frame){display:grid;width:100%;height:100%;min-height:0;max-width:none;margin:0;grid-template-columns:minmax(0,1fr) clamp(120px,16vw,165px);grid-template-rows:auto auto minmax(0,1fr) auto;gap:8px;align-items:stretch}
 body.game-active #main[data-game="chess"] .classic-playarea{display:contents}
 body.game-active #main[data-game="chess"] .chess-frame{grid-column:1;grid-row:1/-1;width:100%;height:100%;min-height:0;max-width:none;margin:0;padding:6px;box-sizing:border-box;container-type:size}
 body.game-active #main[data-game="chess"] .chess-board{width:100%;height:100%;aspect-ratio:auto;grid-template-rows:repeat(8,minmax(0,1fr));min-height:0}
 body.game-active #main[data-game="chess"] .chess-square{aspect-ratio:auto;height:100%;min-height:0}
 body.game-active #main[data-game="chess"] .chess-piece{font-size:clamp(18px,10cqh,54px)}
 body.game-active #main[data-game="chess"] .chess-square small{font-size:9px}
 body.game-active #main[data-game="chess"] .board-heading,
 body.game-active #main[data-game="chess"] .classic-players,
 body.game-active #main[data-game="chess"] .chess-moves{display:none!important}
 body.game-active #main[data-game="chess"] .classic-status{grid-column:2;grid-row:1;min-height:30px;font-size:12px;line-height:1.3;margin:0;overflow-wrap:anywhere}
 body.game-active #main[data-game="chess"] .classic-clock{grid-column:2;grid-row:2;margin:0;padding:6px 5px 10px;gap:4px;font-size:10px;flex-wrap:wrap}
 body.game-active #main[data-game="chess"] .classic-tools{grid-column:2;grid-row:3;display:flex;flex-direction:column;align-self:center;gap:8px;margin:0}
 body.game-active #main[data-game="chess"] .classic-tools>span{display:none}
 body.game-active #main[data-game="chess"] .classic-tools button{font-size:12px;padding:6px;min-height:36px}
 body.game-active #main[data-game="chess"] .game-bottom{grid-column:2;grid-row:4;flex-direction:column;gap:5px}
 body.game-active #main[data-game="chess"] .game-bottom button{font-size:11px;min-height:30px;padding:5px}
 body.game-active #main[data-game="chess"] .promotion-picker{position:absolute;z-index:20;left:10%;right:20%;top:25%;width:auto;max-width:none}
}

/* Desktop chess keeps the site identity above the board, outside the clock rail. */
@media(orientation:landscape) and (min-height:601px){
 body.game-active:has(#main[data-game="chess"] .chess-frame) .profile-menu{position:fixed;top:max(8px,env(safe-area-inset-top));left:max(12px,env(safe-area-inset-left));right:max(12px,env(safe-area-inset-right));z-index:30;height:36px;min-height:36px;margin:0;display:flex;flex-wrap:nowrap;align-items:center;gap:16px;background:var(--bg)}
 body.game-active:has(#main[data-game="chess"] .chess-frame) .profile-menu>[data-rank-open]{flex:0 1 auto;min-width:0}
 body.game-active:has(#main[data-game="chess"] .chess-frame) .profile-identity{flex:0 1 auto;min-width:0}
 body.game-active #main[data-game="chess"]:has(.chess-frame){top:calc(max(8px,env(safe-area-inset-top)) + 44px)}
 body.game-active #main[data-game="chess"] .classic-game:has(.chess-frame){grid-template-columns:minmax(0,1fr) clamp(180px,17vw,220px);gap:12px}
 body.game-active #main[data-game="chess"] .classic-status{font-size:14px;min-height:36px;padding:4px 8px;box-sizing:border-box;line-height:1.4}
 body.game-active #main[data-game="chess"] .imposo-timebar.classic-clock{height:32px;min-height:32px;margin:0;padding:0;align-self:start}
 body.game-active #main[data-game="chess"] .classic-tools button{font-size:14px;min-height:40px;padding:10px 12px}
}

/* Midnight Gold: charcoal board, champagne details and solid porcelain/lacquer checkers. */
#main[data-game="backgammon"]{--bg-gold:#d4b36f;--bg-ivory:#fff0cd;--bg-violet:#d5b5ff}
#main[data-game="backgammon"] .bg-frame{background:radial-gradient(ellipse at 50% 45%,#29272a,#141317 85%);border-color:#292329;box-shadow:inset 0 0 0 2px #c4a265,0 12px 32px #0008}
#main[data-game="backgammon"] .bg-point::before{background:linear-gradient(90deg,#9c7746,#c7a46d 48%,#9c7746)}
#main[data-game="backgammon"] .bg-point.gold-point::before{background:linear-gradient(90deg,#d3c4a5,#f3e5c9 48%,#d3c4a5)}
#main[data-game="backgammon"] .bg-point small{color:#f6e6c4;text-shadow:0 1px 3px #000;font-weight:700}
#main[data-game="backgammon"] .bg-bar{background:linear-gradient(90deg,#111015,#373038 45%,#171319);box-shadow:inset 1px 0 #bb985b,inset -1px 0 #bb985b}
#main[data-game="backgammon"] .bg-bar>span{color:#e6cf9f}
#main[data-game="backgammon"] :is(.bg-checker,.bg-bar-count,.classic-token){box-sizing:border-box;border:2px solid #dec18b;background:radial-gradient(ellipse at 35% 24%,#fffaf0 0%,#f3e9d8 42%,#e7d6b7 75%,#b89a69 100%);box-shadow:inset 0 1px 2px #fff,inset 0 -3px 4px #8c69394d,0 3px 5px #0009;color:#3b2a16}
#main[data-game="backgammon"] :is(.bg-checker,.bg-bar-count,.classic-token).dark{border-color:#d5b172;background:radial-gradient(ellipse at 34% 22%,#9469d3 0%,#593095 33%,#341355 72%,#1d0c34 100%);box-shadow:inset 0 1px 2px #e5ccff99,inset 0 -3px 5px #130722aa,0 3px 5px #000a;color:#fff0da}
#main[data-game="backgammon"] .bg-checker::after{content:'';position:absolute;inset:9%;border-radius:50%;border:1px solid #b8985a88;box-shadow:inset 0 1px 1px #fff8,0 1px 1px #fff6;pointer-events:none}
#main[data-game="backgammon"] .bg-checker.dark::after{border-color:#b9a0dc88;box-shadow:inset 0 1px 1px #dac8ff55,0 1px 1px #170a37aa}
#main[data-game="backgammon"] .classic-player{background:linear-gradient(145deg,#2b2434,#17131e);border-color:#79613e}
#main[data-game="backgammon"] .classic-player.current{border-color:#d5b172;box-shadow:inset 0 0 18px #d4b36f12}
#main[data-game="backgammon"] .classic-player .dark{box-shadow:inset 0 1px 2px #e5ccff99,0 2px 4px #0008}
#main[data-game="backgammon"] .bg-point.source::after{background:#ffe4a4;box-shadow:0 0 5px #e6be7580}
#main[data-game="backgammon"] .bg-point.chosen{background:#dfb96b33}
#main[data-game="backgammon"] .bg-point.destination{background:#e7c78822;box-shadow:inset 0 0 0 2px #ebcc86}
#main[data-game="backgammon"] .bg-point.last-destination{background:#f3dbad18;box-shadow:inset 0 0 0 2px #d8b470aa}
#main[data-game="backgammon"] .bg-bar.chosen{outline-color:#ebcc86}
#main[data-game="backgammon"] .bg-controls>.primary,#main[data-game="backgammon"] .bg-pass-slot>.primary{background:linear-gradient(130deg,#f5e0b3,#cba35d);color:#211823;border:1px solid #eed397;box-shadow:inset 0 1px #fff6,0 3px 8px #0004}
#main[data-game="backgammon"] .bg-controls .secondary{background:linear-gradient(145deg,#2b2533,#17131e);color:#eee0c5;border-color:#907342}
#main[data-game="backgammon"] .bg-dice button{background:#231d2b;border-color:#80663f}
#main[data-game="backgammon"] .bg-dice button.selected{background:#d8b574;border-color:#f3d99f;box-shadow:0 0 0 2px #edc87b44}
#main[data-game="backgammon"] .bg-bearoff.ready{border-color:#efd397;color:#ffe5ab;box-shadow:inset 0 0 14px #e9c27918}
#main[data-game="backgammon"] .dice-rolling-notice{color:#ffe1a3}
@media(orientation:landscape){
 body.game-active #main[data-game="backgammon"] .classic-game:has(.bg-frame){border-color:#292329;background:linear-gradient(110deg,#242127,#17121e);box-shadow:inset 0 0 0 1px #bc995f,0 4px 20px #0006}
 body.game-active #main[data-game="backgammon"] .bg-frame{background:radial-gradient(ellipse at 50% 45%,#29272a,#141317 85%);box-shadow:inset 0 0 0 1px #a8844d}
 body.game-active #main[data-game="backgammon"] .bg-controls{background:#201a28;border:1px solid #695432;border-radius:14px;padding:10px 6px;box-sizing:border-box}
}

/* Emerald Pearl chess, with a shared transparent atlas for all twelve figures. */
#main[data-game="chess"] .chess-frame{background:linear-gradient(145deg,#ecdcac,#9a7c43 45%,#d6be82);box-shadow:0 12px 30px #0008,inset 0 0 0 1px #f3e5bf}
#main[data-game="chess"] .chess-board{border-color:#725f3d;box-shadow:0 0 0 1px #f5e6c9}
#main[data-game="chess"] .chess-square{background:linear-gradient(135deg,#f5eddd,#e6dcc4);color:#4c3b26}
#main[data-game="chess"] .chess-square.dark-square{background:linear-gradient(135deg,#185849,#0c372e);color:#f2dfb7}
#main[data-game="chess"] .chess-square.last-move{background:linear-gradient(135deg,#e2d8a0,#c8c086)}
#main[data-game="chess"] .chess-square.dark-square.last-move{background:linear-gradient(135deg,#367862,#2b6552)}
#main[data-game="chess"] .chess-square.chosen{background:#6a9572;box-shadow:inset 0 0 0 3px #ffe5a9}
#main[data-game="chess"] .chess-square.destination:has(.chess-piece){box-shadow:inset 0 0 0 3px #ffe5a9}
#main[data-game="chess"] .move-marker{background:#bc9a5fe0;box-shadow:0 0 0 2px #fff4d155}
#main[data-game="chess"] .chess-sprite{display:block;width:min(86%,64px);aspect-ratio:362/385;max-height:88%;font-size:0;line-height:0;background-image:url('/chess-emerald-pieces.png?v=2');background-repeat:no-repeat;background-size:600% 188.05195%;background-position:var(--piece-x) 0%;filter:drop-shadow(0 2px 1px #0006);pointer-events:none}
#main[data-game="chess"] .chess-sprite.dark-piece{aspect-ratio:362/339;background-size:600% 213.56932%;background-position:var(--piece-x) 100%;filter:drop-shadow(0 1px 1px #f7dd9c77) drop-shadow(0 2px 1px #0008)}
.chess-sprite.piece-k{--piece-x:0%}.chess-sprite.piece-q{--piece-x:20%}.chess-sprite.piece-r{--piece-x:40%}.chess-sprite.piece-b{--piece-x:60%}.chess-sprite.piece-n{--piece-x:80%}.chess-sprite.piece-p{--piece-x:100%}
#main[data-game="chess"] .classic-player{background:linear-gradient(145deg,#193d32,#15241f);border-color:#9f8856}
#main[data-game="chess"] .classic-player.current{border-color:#dfc48b;box-shadow:inset 0 0 18px #efcf8420}
#main[data-game="chess"] .classic-token{background:radial-gradient(circle at 35% 25%,#fffbed,#e5d6b8 75%);border-color:#d1b478}
#main[data-game="chess"] .classic-token.dark{background:radial-gradient(circle at 35% 25%,#418e70,#07513b 70%,#063628);border-color:#d1b478}
#main[data-game="chess"] .classic-tools .secondary{background:linear-gradient(145deg,#19493b,#112c25);color:#f4e5c5;border-color:#a88c57}
#main[data-game="chess"] .promotion-picker{background:#143d30;border-color:#dfc48b}
#main[data-game="chess"] .promotion-picker button{display:grid;place-items:center;background:#f1e6ce;border-color:#b69d6c;min-height:76px}
#main[data-game="chess"] .promotion-picker .chess-sprite{width:min(90%,64px);max-height:none}
@media(orientation:landscape){
 body.game-active #main[data-game="chess"] .chess-sprite{width:min(86%,10cqh,74px);max-height:88%}
 body.game-active #main[data-game="chess"] .promotion-picker .chess-sprite{width:min(90%,64px);max-height:none}
}

/* Legal destinations: red overlay at 50% opacity, including captures. */
#main[data-game="chess"] .chess-square.destination::after{content:"";position:absolute;inset:0;background:rgba(255,0,0,.5);pointer-events:none;z-index:1}
#main[data-game="chess"] .chess-square.destination{box-shadow:none}
#main[data-game="chess"] .chess-square.destination .move-marker{display:none}

.chess-opponent-turn{margin:0 0 14px}
@media(orientation:landscape){body.game-active #main[data-game="chess"] .chess-opponent-turn{grid-column:2;grid-row:2;min-height:32px;margin:0;align-self:start;font-size:16px}}

/* Reserve the same space for Chess countdown and opponent notice. */
#main[data-game="chess"] .classic-game :is(.classic-clock,.chess-opponent-turn){box-sizing:border-box;width:100%;max-width:490px;height:32px;min-height:32px;max-height:32px;flex:0 0 32px;margin:0 0 14px;padding:0}
@media(orientation:landscape){body.game-active #main[data-game="chess"] .classic-game :is(.classic-clock,.chess-opponent-turn){grid-column:2;grid-row:2;align-self:start;justify-self:stretch;width:100%;max-width:100%;margin:0;padding:0;font-size:16px}}