:root{color-scheme:light;--paper:#f5f2e9;--ink:#293f37;--muted:#687167;--green:#3c5b49;--line:#d9ddd0;--card:#fffdf6;--board:#253e38;font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);-webkit-tap-highlight-color:transparent}button,a,input{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer;touch-action:manipulation}button:disabled{cursor:default;opacity:.4}button:focus-visible,a:focus-visible,input:focus-visible,canvas:focus-visible{outline:3px solid #b0793d;outline-offset:4px}button{border:0}svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.svg-defs{display:none}a{color:inherit}button:not(:disabled):active{transform:translateY(1px)}[hidden]{display:none!important}.site-header{max-width:1240px;margin:0 auto;padding:28px 44px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:650;font-size:21px;letter-spacing:-.6px}.brand .brand-mark{width:34px;height:34px;stroke:none}.brand-sub{display:block;font-size:11px;font-weight:450;letter-spacing:.7px;color:var(--muted);margin-top:5px}.site-header nav{display:flex;gap:12px}.quiet-button{background:transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 12px;font-size:14px;border-radius:9px}.quiet-button:hover{background:#e9ebdf}.help-icon{display:grid;place-items:center;border:1.6px solid currentColor;border-radius:50%;width:21px;height:21px;font-weight:600;font-size:14px}.layout{display:grid;grid-template-columns:minmax(220px,1fr) 320px 180px;gap:52px;max-width:1120px;margin:0 auto;padding:35px 32px 24px;align-items:start}.introduction{padding-top:95px}.eyebrow{font-size:10px;letter-spacing:1.65px;font-weight:650;display:flex;align-items:center;gap:9px}.eyebrow>span{width:6px;height:6px;border-radius:50%;background:#9aab88}h1{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:53px;line-height:1.08;letter-spacing:-2px;margin:23px 0}p{line-height:1.65}.introduction>p{font-size:16px;color:var(--muted);line-height:1.85}.intro-rule{height:1px;background:var(--line);width:48px;margin:30px 0}.small-note{display:flex;align-items:center;gap:13px;font-size:13px;line-height:1.7;color:var(--muted)}.small-note svg{width:27px;height:27px;stroke:#9c794b;stroke-width:1.3}.personal-best{display:flex;align-items:baseline;gap:7px;margin-top:52px;color:var(--muted);font-size:13px;flex-wrap:wrap}.personal-best>span:first-child{width:100%;font-size:10px;letter-spacing:1.5px;margin-bottom:3px}.personal-best strong{font-size:28px;color:var(--ink);font-weight:500;font-variant-numeric:tabular-nums}.game{min-width:0;width:320px}.scoreboard{display:flex;align-items:center;gap:28px;padding:0 1px 16px}.scoreboard>div{min-width:48px}.scoreboard>div:first-child{flex:1}.scoreboard span{display:block;font-size:11px;color:var(--muted);margin-bottom:3px}.scoreboard strong{font-weight:550;font-size:25px;letter-spacing:-.5px;line-height:1.2;font-variant-numeric:tabular-nums}.pause-button{display:grid;place-items:center;width:42px;height:44px;border:1px solid var(--line);border-radius:10px;background:transparent}.board-wrap{position:relative;isolation:isolate;border:8px solid #e0e3d7;border-radius:15px;overflow:hidden;background:var(--board);box-shadow:0 7px 24px #293f370a;aspect-ratio:1/2}#board{display:block;width:100%;height:100%;outline-offset:-4px!important;touch-action:pan-y}#board:focus:not(:focus-visible){outline:none}.board-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;background:#253e38eb;color:#fffdf4;padding:20px 12px}.welcome-mark{display:grid;grid-template-columns:repeat(3,15px);gap:3px;margin:0 0 25px}.welcome-mark i{width:15px;height:15px;border-radius:3px;background:#cdaa70}.welcome-mark i:first-child{grid-column:2}.welcome-mark i:nth-child(2){grid-column:1}.overlay-kicker{font-size:9px;letter-spacing:1.5px;color:#c3d0be}.board-overlay h2{font-family:Georgia,serif;font-size:41px;font-weight:400;line-height:1.1;letter-spacing:-1px;margin:18px 0 15px}.board-overlay p{font-size:13px;line-height:1.7;color:#d2dbce;margin:0 0 24px}.tempo-choice{display:flex;background:#ffffff0a;border:1px solid #ffffff30;padding:4px;border-radius:9px;margin-bottom:13px;width:214px}.tempo-choice button{flex:1;background:transparent;color:#d2dbce;padding:9px 5px;border-radius:6px;font-size:13px;min-height:38px}.tempo-choice button[aria-pressed=true]{background:#f0eadc;color:#293f37;box-shadow:0 1px 3px #0002}.primary-button{display:flex;align-items:center;justify-content:center;gap:10px;background:var(--green);color:var(--card);min-height:52px;border-radius:9px;padding:14px 20px;font-size:15px;font-weight:550}.primary-button:hover{filter:brightness(1.1)}.board-overlay .primary-button{background:#e1bd82;color:#283e33;width:214px}.primary-button svg{width:19px;height:19px;stroke-width:1.6}.overlay-footnote{font-size:10px;color:#bccab9;margin-top:17px}.board-overlay .text-button{color:#e9ecde;margin-top:12px;font-size:13px}.controls{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-top:12px}.control{grid-column:span 2;border:1px solid #d9ddcf;background:#eeeee4;min-height:61px;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;user-select:none;touch-action:none}.control span{font-size:11px;font-weight:550}.control svg{width:24px;height:24px}.control:hover:not(:disabled){background:#e1e7d7}.rotate-control{background:#dce4d4;border-color:#c8d3be}.secondary-control{grid-column:span 3;flex-direction:row;min-height:44px;gap:7px;background:transparent}.secondary-control svg{width:18px;height:18px}.secondary-control span{font-size:12px}.keyboard-hint{display:flex;justify-content:center;gap:8px;font-size:8px;color:var(--muted);margin:13px -10px 0;white-space:nowrap}.game-aside{padding-top:63px}.game-aside h2{text-transform:uppercase;font-size:10px;letter-spacing:1.5px;font-weight:600;margin:0 0 16px}.next-section{padding:3px 0 26px;border-bottom:1px solid var(--line)}#next{display:block;width:112px;height:72px;margin-left:-5px}.next-section>p{font-size:11px;color:var(--muted);margin:12px 0 0}.progress-section{padding:24px 0 0}.mode-label{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:550}.status-dot{width:7px;height:7px;border-radius:50%;background:#859e79}.progress-section>p{font-size:11px;color:var(--muted);margin:11px 0}.progress-section progress{display:block;width:100%;height:4px;border:0;background:#e0e3d8;border-radius:10px;overflow:hidden}.progress-section progress::-webkit-progress-bar{background:#e0e3d8}.progress-section progress::-webkit-progress-value{background:#829971;border-radius:10px}.progress-section progress::-moz-progress-bar{background:#829971}.progress-explanation{font-size:11px!important;line-height:1.8}.tip-section{border-left:2px solid #d3b57f;padding:0 0 0 15px;margin-top:37px}.tip-number{font-size:9px;letter-spacing:1.4px;color:#8a6d3d}.tip-section p{font-size:12px;color:var(--muted);line-height:1.8}.tip-rule{height:1px;width:25px;background:var(--line);margin:17px 0}.text-button{background:transparent;border:0;text-decoration:underline;text-underline-offset:4px;font-size:13px;padding:8px 2px;min-height:40px}.restart-button{color:var(--muted);margin-top:24px;font-size:11px}footer{max-width:1152px;margin:0 auto;padding:20px 12px 25px;display:flex;justify-content:space-between;border-top:1px solid var(--line);font-size:10px;color:var(--muted)}.game-message{position:absolute;bottom:13px;left:50%;transform:translateX(-50%);padding:8px 15px;border-radius:20px;background:#f5f2e9;color:var(--ink);font-size:13px;white-space:nowrap;pointer-events:none;box-shadow:0 2px 12px #0002}.game-message:empty{display:none}.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}
dialog{width:min(460px,calc(100% - 28px));padding:30px;border:1px solid var(--line);border-radius:18px;background:var(--paper);color:var(--ink);box-shadow:0 20px 100px #122b3940;max-height:calc(100dvh - 36px);overflow:auto}dialog::backdrop{background:#1d302bcc}dialog h2{font-family:Georgia,serif;font-size:34px;font-weight:400;letter-spacing:-.7px;margin:14px 0}dialog p{font-size:14px;color:var(--muted)}.dialog-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.icon-button{display:grid;place-items:center;min-width:44px;min-height:44px;border-radius:50%;background:#e8eadd}.dialog-intro{margin-bottom:25px}.setting-row{display:flex;justify-content:space-between;gap:16px;align-items:center;padding:20px 0;border-top:1px solid var(--line);cursor:pointer}.setting-row strong{display:block;font-size:14px;font-weight:550}.setting-row small{display:block;font-size:12px;color:var(--muted);margin-top:6px;line-height:1.6}.setting-row input{appearance:none;position:relative;width:46px;height:28px;border:1px solid #a8b1a2;border-radius:16px;background:#d8ddcf;flex-shrink:0;cursor:pointer}.setting-row input:after{content:'';position:absolute;width:20px;height:20px;left:3px;top:3px;background:#fffdf6;border-radius:50%;box-shadow:0 1px 3px #0002}.setting-row input:checked{background:var(--green);border-color:var(--green)}.setting-row input:checked:after{left:21px}.setting-note{font-size:12px;margin:20px 0 25px}dialog>.primary-button{width:100%}.instructions{padding-left:24px;margin-top:25px}.instructions li{padding-left:7px;margin:0 0 20px}.instructions li::marker{color:#8b6f3f;font-family:Georgia,serif;font-size:21px}.instructions strong{font-size:15px;font-weight:600}.instructions p{margin:5px 0}.install-note{padding:16px;background:#e8ecdf;border-radius:10px;margin:20px 0}.install-note strong{font-size:13px}.install-note p{font-size:12px;margin:7px 0 0}.help-keyboard{font-size:11px!important}.dialog-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:25px}.high-contrast{--muted:#465247;--line:#b9c5b2}.high-contrast .control{border-color:#7a8e71}.high-contrast .board-wrap{border-color:#a7b498}
@media(min-width:1000px) and (max-height:900px){.layout{grid-template-columns:minmax(220px,1fr) 276px 180px;gap:50px;padding-top:23px}.game{width:276px}.board-wrap{aspect-ratio:auto;height:min(54vh,500px)}.introduction{padding-top:78px}.scoreboard{gap:22px}.site-header{padding-top:20px;padding-bottom:20px}.game-aside{padding-top:60px}footer{padding-top:15px}.control{min-height:55px}.secondary-control{min-height:42px}}
@media(max-width:999px){.layout{grid-template-columns:300px 170px;justify-content:center;gap:35px;padding:25px 20px}.introduction{display:none}.game{width:300px}.site-header{padding:20px 28px}footer{margin:0 28px}.board-wrap{aspect-ratio:auto;height:min(56vh,570px)}}
@media(max-width:600px){.site-header{padding:12px 18px 10px;margin:0 12px}.brand{font-size:19px;gap:9px}.brand .brand-mark{width:29px;height:29px}.brand-sub{font-size:9px;margin-top:3px;letter-spacing:.5px}.nav-label{display:none}.site-header nav{gap:0}.quiet-button{min-height:44px;min-width:44px;padding:10px}.site-header .quiet-button svg{width:22px;height:22px}.layout{width:100%;max-width:430px;display:grid;grid-template-columns:minmax(0,1fr) 68px;gap:0 12px;padding:13px 19px 12px;align-items:start}.game{display:contents}.scoreboard{grid-column:1/-1;grid-row:1;gap:22px;padding:0 0 12px;align-items:center}.scoreboard>div:first-child{flex:0;min-width:80px}.scoreboard>div{min-width:54px}.scoreboard span{font-size:10px;margin-bottom:2px}.scoreboard strong{font-size:24px}.pause-button{margin-left:auto;width:43px;height:43px}.board-wrap{grid-column:1;grid-row:2;width:100%;height:auto;aspect-ratio:1/2;max-height:calc(100svh - 272px);border-width:5px;border-radius:11px;justify-self:center}.game-aside{display:contents}.next-section{grid-column:2;grid-row:2;align-self:start;padding:5px 0 14px;border-bottom:0}.game-aside h2{font-size:8px;letter-spacing:.8px;line-height:1.6;margin:0 0 5px}#next{width:68px;height:46px;margin-left:-5px}.next-section>p{display:none}.progress-section{grid-column:2;grid-row:2;align-self:start;margin-top:108px;padding:13px 0;border-top:1px solid var(--line)}.mode-label{font-size:10px;align-items:flex-start;gap:5px;line-height:1.5}.status-dot{margin-top:4px;width:5px;height:5px;flex-shrink:0}.progress-section>p{font-size:10px;line-height:1.6;margin:9px 0}.progress-explanation,.tip-section,.restart-button{display:none}.controls{grid-column:1/-1;grid-row:3;margin-top:12px;gap:7px}.control{min-height:58px}.control span{font-size:12px}.secondary-control{min-height:44px}.secondary-control span{font-size:13px}.keyboard-hint{display:none}.board-overlay{padding:12px 8px}.welcome-mark{margin-bottom:15px;grid-template-columns:repeat(3,12px);gap:2px}.welcome-mark i{width:12px;height:12px;border-radius:2px}.board-overlay h2{font-size:33px;margin:13px 0}.overlay-kicker{font-size:7px;letter-spacing:1px}.board-overlay p{font-size:11px;margin-bottom:18px}.tempo-choice,.board-overlay .primary-button{width:calc(100% - 20px);max-width:214px}.tempo-choice button{font-size:12px;min-height:34px;padding:7px 4px}.tempo-choice{margin-bottom:10px}.board-overlay .primary-button{min-height:47px;font-size:14px;padding:11px}.overlay-footnote{font-size:9px;margin-top:12px}.board-overlay .text-button{margin-top:5px;font-size:12px}footer{border:0;justify-content:center;margin:0;padding:0 18px max(12px,env(safe-area-inset-bottom));font-size:9px}footer>span:first-child{display:none}dialog{padding:23px}dialog h2{font-size:30px}}
@media(max-width:600px) and (max-height:720px){.site-header{padding-top:8px;padding-bottom:8px}.layout{padding-top:9px}.scoreboard{padding-bottom:8px}.board-wrap{max-height:calc(100svh - 244px)}.welcome-mark{display:none}.board-overlay h2{font-size:29px;margin:10px 0}.board-overlay p{font-size:10px;margin-bottom:12px}.overlay-footnote{margin-top:9px}.control{min-height:52px}.secondary-control{min-height:42px}.controls{margin-top:9px}.overlay-kicker{font-size:6px}.board-overlay .text-button{min-height:30px}.tempo-choice button{min-height:31px}.tempo-choice{padding:3px}.board-overlay .primary-button{min-height:44px}}
@media(min-width:1000px) and (max-height:900px){.layout{grid-template-columns:minmax(220px,1fr) clamp(244px,calc((100svh - 220px)/2),320px) 180px}.game{width:100%;position:relative}.board-wrap{height:auto;aspect-ratio:1/2}.controls{position:absolute;width:180px;left:calc(100% + 50px);bottom:0}.controls .secondary-control{grid-column:span 6}.controls .control span{font-size:10px}.keyboard-hint{display:none}.tip-section{display:none}.introduction{padding-top:65px}.personal-best{margin-top:30px}}
@media(min-width:601px) and (max-width:999px){.board-wrap{height:auto;aspect-ratio:1/2}}
@media(max-width:600px){.board-wrap{width:min(100%,calc((100svh - 272px)/2));min-width:174px;max-height:none}}
@media(max-width:600px) and (max-height:720px){.board-wrap{width:min(100%,calc((100svh - 244px)/2));max-height:none}.board-overlay h2{font-size:27px}}
dialog p{font-size:16px}.setting-row strong{font-size:16px}.setting-row small{font-size:14px}.setting-note{font-size:13px}
@media(max-width:600px){.control span,.secondary-control span{font-size:14px}.game-aside h2{font-size:10px}.mode-label,.progress-section>p{font-size:11px}}
.board-wrap{height:auto;aspect-ratio:auto}#board{height:auto;aspect-ratio:1/2}
@media(min-width:1000px) and (max-height:900px){.restart-button{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}