:root{color-scheme:light;--page:#f6f5f1;--ink:#272824;--muted:#82847c;--line:#dedfd7;--tile-size:24px;--columns:16;--rows:16;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--page);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,select{cursor:pointer}button{color:inherit}button:focus-visible,select:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid #427458;outline-offset:4px}button{border:0;background:none}a{color:inherit}button:hover{color:#111}button:disabled{cursor:default}::selection{background:#d5dfca}.site-header{height:89px;max-width:1120px;margin:auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 4px}.wordmark{display:flex;gap:12px;align-items:center;text-decoration:none;font-weight:700;font-size:19px}.wordmark img{image-rendering:pixelated}.wordmark-en{display:block;font-family:"Courier New",monospace;font-weight:400;font-size:10px;letter-spacing:1.6px;margin-top:4px}.mode-label{display:flex;align-items:center;gap:8px;font-size:12px;color:#65685c}.mode-label>span{width:6px;height:6px;background:#75846a;border-radius:50%}main{padding:0 28px;max-width:1000px;margin:0 auto}.intro{text-align:center;padding:47px 0 31px}.eyebrow{margin:0 0 13px;color:#7b806f;font:10px "Courier New",monospace;letter-spacing:2px}.intro h1{font-size:32px;letter-spacing:2px;line-height:1.3;font-weight:600;margin:0 0 10px}.intro-copy{font-size:13px;color:#7c7f74;margin:0}.play-area{max-width:790px;margin:0 auto}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px;border-bottom:1px solid var(--line);padding:0 0 14px}.difficulties{display:flex;gap:4px;background:#ecece5;padding:4px;border-radius:6px}.difficulties button{font-size:13px;padding:8px 19px;border-radius:3px;color:#777b6f;white-space:nowrap}.difficulties button[aria-pressed=true]{background:#fff;box-shadow:0 1px 3px #00000012;color:#282c24;font-weight:600}.difficulties button:hover{color:#252c20}.utilities{display:flex;gap:18px}.utilities button{padding:8px 0;font-size:12px;color:#73786b;white-space:nowrap}.utilities button:hover{color:#202719}.utilities span{margin-left:3px}.board-heading{display:flex;align-items:center;justify-content:space-between;color:#8a8d82;font-size:11px;padding:18px 0 20px;font-variant-numeric:tabular-nums}.size-label{display:flex;align-items:center;gap:8px}.size-label select{background:transparent;color:#777c6d;font-size:11px;border:1px solid #dadcd2;border-radius:3px;padding:3px 5px}.board-scroll{width:100%;overflow:auto;padding:1px 1px 5px;overscroll-behavior-x:contain;scrollbar-width:thin;scrollbar-color:#c0c2b8 transparent}.game-frame{width:max-content;margin:0 auto;background:#c0c0c0;padding:9px;border:3px solid;border-color:#fff #808080 #808080 #fff;user-select:none;-webkit-user-select:none}.game-top{height:56px;border:2px solid;border-color:#808080 #fff #fff #808080;margin-bottom:9px;padding:6px;display:flex;align-items:center;justify-content:space-between;gap:5px}.digital-display{height:36px;width:58px;background:#000;border:1px solid;border-color:#808080 #fff #fff #808080;flex-shrink:0;padding:0 1px}.digital-display svg{display:block;width:100%;height:100%}.face{height:36px;width:36px;border:3px solid;border-color:#fff #808080 #808080 #fff;background:#c0c0c0;padding:1px;outline:1px solid #808080}.face>span{display:block;width:100%;height:100%;background:var(--face-ready) center/contain no-repeat;image-rendering:pixelated}.face[data-face=pressed]>span{background-image:var(--face-pressed)}.face[data-face=won]>span{background-image:var(--face-won)}.face[data-face=lost]>span{background-image:var(--face-lost)}.face:active{border-color:#808080 #fff #fff #808080;padding:2px 0 0 2px}.board{display:grid;grid-template-columns:repeat(var(--columns),var(--tile-size));grid-template-rows:repeat(var(--rows),var(--tile-size));width:max-content;border:3px solid;border-color:#808080 #fff #fff #808080;outline:none;touch-action:pan-x pan-y;cursor:default;-webkit-touch-callout:none}.cell{position:relative;width:var(--tile-size);height:var(--tile-size);padding:0;margin:0;border:0;background:#c0c0c0;box-shadow:inset 2px 2px #fff,inset -2px -2px #808080;cursor:default;outline:none}.cell::after{content:"";display:block;position:absolute;inset:0;background-position:center;background-repeat:no-repeat;background-size:100%;image-rendering:pixelated;pointer-events:none}.cell.open,.cell.pressed{box-shadow:none;border-top:1px solid #808080;border-left:1px solid #808080}.cell[data-value="1"]::after{background-image:var(--n1)}.cell[data-value="2"]::after{background-image:var(--n2)}.cell[data-value="3"]::after{background-image:var(--n3)}.cell[data-value="4"]::after{background-image:var(--n4)}.cell[data-value="5"]::after{background-image:var(--n5)}.cell[data-value="6"]::after{background-image:var(--n6)}.cell[data-value="7"]::after{background-image:var(--n7)}.cell[data-value="8"]::after{background-image:var(--n8)}.cell[data-value=flag]::after{background-image:var(--flag)}.cell[data-value=mine]::after{background-image:var(--mine)}.cell[data-value=wrong]::after{background-image:var(--wrong)}.cell[data-value=question]::after{content:"?";font-family:"Courier New",monospace;font-size:calc(var(--tile-size) * .8);font-weight:bold;line-height:var(--tile-size);text-align:center;color:#000}.cell.exploded{background:#f00}.cell:focus-visible{outline:2px solid #3d6ca5;outline-offset:-3px;z-index:1}.game-status{min-height:52px;display:flex;justify-content:center;align-items:center;gap:8px;font-size:12px;color:#7a7f6f;text-align:center;line-height:1.6;padding:10px 0}.status-dot{width:5px;height:5px;border-radius:50%;background:#a4ab98;flex-shrink:0}.game-status[data-state=won]{color:#467240}.game-status[data-state=won] .status-dot{background:#467240}.game-status[data-state=lost]{color:#a45a48}.game-status[data-state=lost] .status-dot{background:#a45a48}.quick-help{display:flex;justify-content:center;gap:20px;font-size:11px;color:#939789;flex-wrap:wrap}.quick-help>span{white-space:nowrap}kbd{font:10px inherit;display:inline-block;border:1px solid #d9dccf;border-bottom-width:2px;border-radius:3px;padding:3px 5px;margin-right:4px;color:#737969;background:#f9f9f5}.personal-best{display:flex;justify-content:center;align-items:center;gap:12px;font-size:11px;color:#8c9183;margin-top:28px}.personal-best strong{font:12px "Courier New",monospace;color:#5f6955}.best-divider{color:#d0d5c7;padding:0 2px}.closing-note{text-align:center;margin:42px 0 0;font-size:11px;color:#9b9f93;line-height:1.8}.closing-note span{margin-left:6px}footer{max-width:1120px;border-top:1px solid var(--line);margin:39px auto 0;padding:20px 4px 24px;display:flex;justify-content:space-between;color:#989d90;font-size:10px;letter-spacing:.7px}.footer-dot{color:#b3b8aa;margin:0 5px}footer>span:last-child{font-family:"Courier New",monospace}.touch-tools{display:none}dialog{width:min(500px,calc(100vw - 32px));max-height:85dvh;overflow:auto;padding:28px;border:1px solid #dedfd4;border-radius:10px;background:#fafaf6;color:var(--ink);box-shadow:0 18px 80px #27302025}dialog::backdrop{background:#242b244d}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px}.dialog-heading h2{font-size:20px;margin:0;font-weight:600}.close-dialog{font-size:26px;line-height:1;color:#8a8e81;padding:2px 6px}.close-dialog:hover{color:#222}dialog p{font-size:13px;line-height:1.8;color:#727869}.help-list{display:grid;grid-template-columns:90px 1fr;gap:15px 12px;font-size:12px;line-height:1.8;margin:24px 0}.help-list dt{color:#444d3b;font-weight:600}.help-list dd{margin:0;color:#7b8172}dialog .dialog-note{font-size:11px;line-height:1.9;color:#94998b;border-top:1px solid var(--line);padding-top:16px;margin:20px 0 0}.setting-row{display:flex;justify-content:space-between;gap:18px;align-items:center;padding:18px 0;border-bottom:1px solid #e8e9e1}.setting-row strong{display:block;font-size:14px;font-weight:500}.setting-row small{display:block;font-size:11px;color:#8b9280;margin-top:7px}.setting-row input{width:18px;height:18px;accent-color:#626e50}.custom-fields{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.custom-fields label{font-size:12px;color:#7b836e}.custom-fields input{width:100%;display:block;margin-top:9px;border:1px solid #d6dace;border-radius:4px;background:#fff;padding:10px;color:#404936}.primary-button{width:100%;display:flex;justify-content:space-between;margin-top:24px;padding:13px 16px;background:#515e42;border-radius:4px;font-size:13px;color:#fff}.primary-button:hover{background:#3f4c30;color:#fff}#custom-error{color:#a24e3e;font-size:12px}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:12px;margin-top:20px;font-variant-numeric:tabular-nums}th{text-align:left;font-size:11px;color:#929986;font-weight:400;padding:12px 5px;border-bottom:1px solid var(--line)}td{padding:17px 5px;border-bottom:1px solid #e7eadf}td:nth-child(n+2),th:nth-child(n+2){text-align:right;white-space:nowrap}
.board-row{display:contents}
@media(min-width:1600px){.intro{padding-top:65px}footer{margin-top:50px}}
@media(min-width:601px) and (max-height:850px){.site-header{height:60px}.intro{padding:19px 0 19px}.intro h1{font-size:26px;margin-bottom:6px}.eyebrow{margin-bottom:8px;font-size:9px}.intro-copy{font-size:12px}.toolbar{padding-bottom:10px}.board-heading{padding:12px 0}.game-status{min-height:38px}.personal-best{margin-top:17px}.closing-note{margin-top:24px}footer{margin-top:23px}}
@media(max-width:1180px){.site-header,footer{margin-left:32px;margin-right:32px}}
@media(max-width:600px){.site-header{height:72px;margin:0 20px}.wordmark{font-size:17px}.wordmark-en{font-size:9px}.mode-label{font-size:11px}main{padding:0 16px}.intro{padding:32px 0 28px}.intro h1{font-size:28px}.eyebrow{font-size:9px;letter-spacing:1.5px}.intro-copy{font-size:12px}.toolbar{gap:10px;flex-wrap:wrap}.difficulties{gap:0}.difficulties button{font-size:12px;padding:8px 13px}.utilities{gap:13px;margin-left:auto}.utilities button{font-size:11px}.board-heading{padding:17px 0}.game-status{font-size:11px}.quick-help{gap:10px;font-size:10px}.personal-best{margin-top:23px}.closing-note{margin-top:30px;font-size:10px}.closing-note span{display:block;margin:0}footer{margin:30px 20px 0;font-size:9px}.help-list{grid-template-columns:75px 1fr;gap:15px 8px}dialog{padding:23px}.dialog-heading h2{font-size:18px}}
.touch-device .touch-tools{display:flex;justify-content:center;align-items:center;gap:5px;margin:16px 0 0}.touch-device .touch-tools button{padding:9px 18px;font-size:12px;border:1px solid #daddd2;border-radius:4px;color:#7a826e}.touch-device .touch-tools button[aria-pressed=true]{background:#657153;color:#fff;border-color:#657153}.touch-device .touch-tools>span{font-size:10px;color:#929b86;margin-left:8px}.touch-device .quick-help{display:none}.touch-device .personal-best{margin-top:12px}

/* Friend rooms use the same board and controls as single-player. */
[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.play-modes{display:flex;gap:5px;padding:4px;background:#eeeee7;border-radius:5px}.play-modes button{font-size:12px;padding:8px 14px;border-radius:3px;color:#7b806f}.play-modes button[aria-pressed=true]{background:#fff;color:#3a4330;box-shadow:0 1px 3px #00000010}.play-modes button span{margin-left:4px}button:disabled{opacity:.5;cursor:default}.duel-room-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;font-size:11px;padding:12px 0;color:#848b76;border-bottom:1px solid var(--line);margin-bottom:14px}.duel-room-bar strong{font:700 14px 'Courier New',monospace;letter-spacing:2px;color:#46583b;margin-left:8px}.duel-room-bar #duel-connection{margin-left:14px;font-size:10px}.duel-room-bar button{font-size:11px;padding:4px 0;margin-left:15px;color:#69765a}.duel-room-bar #duel-leave{color:#969a8d}.duel-room-bar input{width:100%;font-size:11px;padding:7px;border:1px solid var(--line);background:#fff}.duel-panel{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 0 13px;border-bottom:1px solid var(--line)}.duel-caption{color:#77846a;font-size:10px;letter-spacing:1px}.duel-information{min-width:0}.duel-information p{margin:6px 0 0;font-size:12px;color:#5e6c51;line-height:1.7}.duel-actions{display:flex;gap:10px;margin-top:10px}.duel-actions:has(>button[hidden]:first-child):has(>button[hidden]:nth-child(2)):has(>button[hidden]:nth-child(3)){display:none}.duel-button{font-size:12px;padding:8px 13px;border-radius:4px;background:#5e6d4d;color:#fff;white-space:nowrap}.duel-button:hover{color:#fff;background:#495b38}.duel-button[aria-pressed=true]{background:#e3e8da;color:#627451}.duel-actions #duel-reconnect{font-size:11px;border:1px solid #cbd3bf;border-radius:3px}.opponent-summary{text-align:right;min-width:82px;flex-shrink:0;padding-left:16px;border-left:1px solid var(--line)}.opponent-summary>span{display:block;font-size:11px;color:#748368}.opponent-summary strong{display:block;font:28px 'Courier New',monospace;color:#445b36;margin:5px 0 3px;font-variant-numeric:tabular-nums}.opponent-summary small{display:block;font-size:9px;color:#9ba390}.game-frame{position:relative}.duel-overlay{position:absolute;z-index:3;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:13px;background:#c0c0c0ed;color:#53574d;cursor:default;padding:10px;text-align:center}.duel-overlay strong{font-size:18px;font-weight:600}.duel-overlay span{font-size:11px;color:#797e70;line-height:1.6}.duel-overlay.counting strong{font:700 64px 'Courier New',monospace;line-height:1}.duel-form>label{display:block;font-size:11px;color:#7d8671;margin-bottom:8px}.duel-form>select{width:100%;padding:11px;background:#fff;border:1px solid #d6dccd;border-radius:4px;color:#505e42;font-size:13px}.duel-form .primary-button{margin-top:12px}.duel-or{display:flex;align-items:center;gap:12px;color:#959d8b;font-size:11px;margin:23px 0 17px}.duel-or:before,.duel-or:after{content:'';height:1px;flex:1;background:var(--line)}.join-form{display:flex;gap:10px}.join-form input{min-width:0;flex:1;border:1px solid #d6dccd;border-radius:4px;padding:10px 12px;background:#fff;font-size:13px;text-transform:uppercase;letter-spacing:1px}.join-form .duel-button{padding:10px 19px}#duel-error{font-size:12px;color:#a25e45;min-height:20px;margin-bottom:0}body[data-mode=duel] .personal-best,body[data-mode=duel] .closing-note,body[data-mode=duel] .quick-help>span:last-child{display:none}body[data-mode=duel] .intro{padding:23px 0 20px}body[data-mode=duel] .intro .eyebrow{display:none}body[data-mode=duel] .intro h1{font-size:26px}body[data-mode=duel] .toolbar .difficulties{background:transparent;padding:0}body[data-mode=duel] .difficulties button{padding:5px 12px}body[data-mode=duel] .difficulties button[aria-pressed=true]{box-shadow:none;background:#e9eddf;opacity:1}body[data-mode=duel] .game-status{font-size:11px}
@media(min-width:601px) and (max-height:850px){body[data-mode=duel] .intro{display:none}body[data-mode=duel] .duel-room-bar{margin-bottom:10px;padding:9px 0}body[data-mode=duel] .duel-panel{padding:10px 0}body[data-mode=duel] .toolbar{padding-bottom:8px}body[data-mode=duel] .board-heading{padding:8px 0}}
@media(max-width:600px){.play-modes button{padding:7px 9px;font-size:11px}.duel-room-bar{font-size:10px}.duel-room-bar button{font-size:10px;margin-left:9px}.duel-room-bar #duel-connection{display:none}.duel-panel{gap:10px}.duel-information p{font-size:11px}.opponent-summary{padding-left:11px;min-width:75px}.opponent-summary strong{font-size:25px}.duel-overlay strong{font-size:16px}.duel-overlay.counting strong{font-size:52px}.duel-overlay span{font-size:10px}body[data-mode=duel] .intro{padding:22px 0 13px}body[data-mode=duel] .intro h1{font-size:23px}}
body[data-mode=duel] .intro{display:none}body[data-mode=duel] .game-status{display:none}body[data-mode=duel] .quick-help{margin-top:18px}.face:disabled{opacity:1}