@charset "UTF-8";
:root{color-scheme:light;--ink:#182e40;--muted:#5d6d75;--paper:#edf0ef;--white:#fafbf8;--line:#d4dcd9;--orange:#bf462c;--orange-light:#f9e9e0;--green:#27664e;--green-light:#e4eee7;--number:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-underline-offset:4px}button:disabled{cursor:default;opacity:.38}button:focus-visible,a:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:4px}button{touch-action:manipulation}button,select,a{scroll-margin-top:24px}[hidden]{display:none!important}.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}.skip-link{position:fixed;left:16px;top:-60px;z-index:5;padding:12px;background:var(--ink);color:#fff}.skip-link:focus{top:10px}.site-header,main,.site-footer{width:min(1088px,calc(100% - 64px));margin:auto}.site-header{height:104px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.wordmark{font-family:Georgia,"Times New Roman",serif;font-size:29px;font-weight:700;letter-spacing:-1.3px;text-decoration:none;display:flex;align-items:center}.wordmark-dot{color:var(--orange)}.brand-mark{display:grid;grid-template-columns:repeat(2,8px);gap:3px;margin-right:12px;transform:rotate(-5deg)}.brand-mark i{height:8px;border-radius:1px;background:var(--ink)}.brand-mark i:nth-child(2){background:var(--orange)}.brand-mark i:nth-child(3){opacity:.3}.how-link{font-size:13px;font-weight:600;text-decoration:none;padding:14px 0 14px 16px}.how-link span{margin-left:15px;color:var(--orange);font-size:18px}.page-heading{display:flex;align-items:flex-end;justify-content:space-between;margin:40px 0 28px;gap:20px}.eyebrow{font-size:10px;letter-spacing:2.1px;font-weight:750;margin:0 0 12px;color:var(--muted)}h1{font-family:Georgia,"Times New Roman",serif;font-weight:400;letter-spacing:-1.7px;font-size:48px;line-height:1.07;margin:0}.edition{margin:0;text-align:right;display:flex;flex-direction:column;gap:6px}.edition>span:first-child{font-size:9px;letter-spacing:1.9px;color:var(--orange);font-weight:750}.edition time{font-family:var(--number);font-size:15px}.edition>span:last-child{font-size:11px;color:var(--muted)}.play-layout{display:grid;grid-template-columns:minmax(0,706px) minmax(220px,1fr);gap:58px;align-items:start}.game-panel{background:var(--white);border:1px solid #d6ded9;border-radius:18px;padding:24px 32px 18px;box-shadow:0 10px 40px #1a304005;outline:none}.game-topbar{display:flex;justify-content:space-between;align-items:center;gap:12px}.mode-switch{display:flex;background:#e9eeeb;border-radius:8px;padding:3px;gap:2px}.mode-switch button{border:0;background:transparent;border-radius:6px;min-height:36px;padding:7px 19px;font-size:12px;font-weight:650;color:var(--muted)}.mode-switch button[aria-pressed=true]{background:var(--white);color:var(--ink);box-shadow:0 2px 5px #142c4012}.puzzle-meta{font-family:var(--number);font-size:11px;color:var(--muted)}.practice-controls{display:flex;gap:10px;align-items:center;padding-top:16px;font-size:12px}.practice-controls label{color:var(--muted)}select{border:1px solid var(--line);background:var(--white);color:var(--ink);padding:10px 24px 10px 9px;border-radius:6px;max-width:100%}.text-button{margin-left:auto;border:0;background:transparent;padding:12px 0;font-size:12px;color:var(--orange);font-weight:650}.text-button span{font-size:17px;margin-left:4px}.board-topline{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin:30px 0 10px;padding-left:10px}.board-topline span:first-child{color:var(--orange);letter-spacing:.4px}.board-topline i{display:inline-block;width:5px;height:5px;background:var(--orange);border-radius:50%;margin:0 8px 2px 0}.board-scroller{max-width:100%;overflow:visible}.puzzle-board{width:100%;table-layout:fixed;border-collapse:separate;border-spacing:5px;font-family:var(--number);user-select:none}.puzzle-board th{font-weight:500}.puzzle-board .weight-column{width:31px}.puzzle-board .sum-column{width:64px}.puzzle-board thead th{height:31px;color:var(--orange);font-size:16px}.puzzle-board thead .sum-heading{font-family:Inter,ui-sans-serif,sans-serif;font-size:8px;letter-spacing:1.2px;color:var(--muted)}.puzzle-board tbody th{font-size:16px;color:var(--orange);text-align:left;padding-left:3px}.puzzle-board td{padding:0}.cell{display:block;width:100%;aspect-ratio:1;border:1px solid #7b8c80;border-radius:7px;background:#eaf0eb;position:relative;color:var(--ink);transition:background-color .13s,border-color .13s,transform .13s;min-height:42px;padding:0}.cell:after{content:"";position:absolute;left:50%;top:50%;width:4px;height:4px;background:#b9c5bd;border-radius:50%;transform:translate(-50%,-50%)}.cell[data-mark="1"]{background:var(--ink);border-color:var(--ink)}.cell[data-mark="1"]:after{background:#c8d4d8;width:6px;height:6px;opacity:.35}.cell[data-mark="2"]:after{content:"×";width:auto;height:auto;font-size:27px;line-height:1;background:none;border-radius:0;color:#62776a;font-weight:300}.cell:hover{border-color:#617e70}.cell[data-mark="1"]:hover{background:#254557}.cell:active{transform:scale(.965)}.cell:focus-visible{outline:3px solid var(--orange);outline-offset:1px;z-index:1}.cell.hinted{box-shadow:inset 0 0 0 3px #e7915d}.sum{font-size:19px;text-align:center;border-radius:7px;padding:5px 1px;color:var(--ink)}.sum .current{font-size:12px;color:var(--muted)}.sum .slash{font-size:12px;color:var(--muted);margin:0 2px}.sum .target{font-weight:650}.sum.match{background:var(--green-light);color:var(--green)}.sum.match .current{color:var(--green)}.sum.over{background:var(--orange-light);color:#9d3524}.sum.over .current{color:#9d3524}.sum.match:after{content:"·";position:absolute;display:none}.puzzle-board tfoot td{height:43px}.board-bottomline{display:flex;justify-content:space-between;gap:10px;font-size:10px;margin:6px 5px 0;color:var(--muted)}.weight-key{color:var(--orange)}.sum-sample b{font-weight:650;color:var(--ink)}.entry-controls{display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid #e0e6e1;margin-top:23px;padding-top:18px}.mark-switch{display:flex;gap:5px}.mark-switch button{display:flex;align-items:center;gap:8px;border:1px solid transparent;border-radius:7px;background:transparent;color:var(--muted);font-size:12px;min-height:42px;padding:9px 11px}.mark-switch button[aria-pressed=true]{border-color:var(--ink);color:var(--ink)}.filled-symbol{width:10px;height:10px;border-radius:2px;background:currentColor}.mark-switch button:nth-child(2) span{font-size:20px;line-height:10px}.move-count{font-size:11px;color:var(--muted);white-space:nowrap}.move-count strong{font-family:var(--number);font-weight:500;color:var(--ink)}.action-row{display:grid;grid-template-columns:1fr 1fr 1.45fr;gap:9px;margin-top:14px}.action-row button{border:1px solid var(--line);color:var(--ink);background:transparent;border-radius:7px;min-height:43px;font-size:12px;font-weight:550}.action-row button:hover:not(:disabled){background:#e9eeeb}.action-row button span{font-size:19px;vertical-align:-1px;margin-right:4px}.action-row .hint-button{border-color:#d9baa7;background:#faf1e9;color:#9d4327}.action-row .hint-button:hover:not(:disabled){background:#f5e5d7}.game-message{font-size:11px;line-height:1.55;min-height:34px;margin:14px 0 0;color:var(--muted)}.storage-message{font-size:11px;line-height:1.5;color:#a43e2b;margin:0}.storage-message:empty{display:none}.win-panel{display:flex;align-items:center;gap:12px;background:var(--green-light);border-radius:10px;padding:16px;margin-top:13px}.win-check{font-size:23px;color:var(--green)}.win-panel h2{font-family:Georgia,serif;font-size:21px;font-weight:400;margin:0 0 5px}.win-panel p{font-size:11px;margin:0;color:var(--green)}.win-panel button{border:0;background:transparent;margin-left:auto;font-size:11px;color:var(--green);font-weight:650;min-height:44px;white-space:nowrap}.rule-rail{padding-top:24px}.rule-rail h2{font-family:Georgia,serif;font-weight:400;font-size:31px;line-height:1.16;letter-spacing:-.6px;margin:21px 0 17px}.rule-rail p{font-size:12px;line-height:1.8;color:var(--muted);max-width:225px}.rule-rail strong{font-weight:600;color:var(--ink)}.mini-example{width:198px;margin:24px 0 18px}.mini-weights,.mini-cells{display:grid;grid-template-columns:repeat(4,1fr);gap:5px}.mini-weights{font-family:var(--number);font-size:12px;color:var(--orange);text-align:center;margin-bottom:7px}.mini-cells i{height:35px;background:#dbe3de;border:1px solid #cad5ce;border-radius:4px}.mini-cells i.on{background:var(--ink);border-color:var(--ink)}.mini-equation{font-family:var(--number);text-align:center;margin-top:13px;font-size:14px;color:var(--muted);letter-spacing:2px}.mini-equation b{color:var(--orange);font-weight:500}.mini-equation strong{font-size:20px;color:var(--ink)}.rule-rail .rule-emphasis{font-weight:600;color:var(--ink);font-size:12px;margin-bottom:4px}.rail-link{display:inline-block;font-size:12px;font-weight:600;margin-top:12px;text-decoration:none;border-bottom:1px solid #a8b4ac;padding-bottom:7px}.rail-link span{margin-left:15px;color:var(--orange)}.keyboard-help{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;font-size:11px}.keyboard-help summary{cursor:pointer;color:var(--muted);min-height:30px}.keyboard-help p{font-size:11px;line-height:1.8;margin:5px 0}kbd{font:10px var(--number);padding:2px 3px;border:1px solid var(--line);border-radius:3px;background:#f6f8f5}.rail-bottom{display:flex;align-items:center;gap:12px;margin-top:22px}.small-grid{font-size:26px;color:#8eaaa0}.rail-bottom p{font-size:10px;line-height:1.6}.below-game{max-width:706px;margin:40px 0 45px}.below-game h2{font-family:Georgia,serif;font-size:23px;font-weight:400;letter-spacing:-.25px}.below-game p{font-size:12px;line-height:1.9;color:var(--muted);max-width:640px}.site-footer{border-top:1px solid var(--line);padding:25px 0 32px;display:flex;justify-content:space-between;gap:20px;font-size:10px;color:var(--muted)}.site-footer a{text-decoration:none}.noscript-note{font-size:13px;line-height:1.6}.rules-main{max-width:900px}.rules-heading{margin:48px 0 28px}.rules-heading h1{font-size:48px}.rules-intro{font-size:16px;line-height:1.8;max-width:620px;color:var(--muted)}.rules-content{display:grid;grid-template-columns:1fr 1fr;gap:28px}.rule-block{background:var(--white);border:1px solid var(--line);border-radius:14px;padding:26px}.rule-block h2{font-family:Georgia,serif;font-size:27px;line-height:1.2;font-weight:400;margin:9px 0 16px}.rule-block p,.rule-block li{font-size:14px;line-height:1.8;color:var(--muted)}.rule-block strong{color:var(--ink)}.rule-block ol{padding-left:19px}.example-row{display:flex;gap:6px;align-items:center;margin:18px 0}.example-row span{display:grid;place-content:center;min-width:39px;height:43px;border-radius:5px;background:#eaf0eb;color:var(--orange);font-family:var(--number)}.example-row .chosen{background:var(--ink);color:#fff}.example-row b{margin-left:9px;font:20px var(--number);color:var(--ink)}.example-note{border-left:3px solid var(--orange);padding-left:14px}.rules-wide{grid-column:1/-1}.start-link{display:inline-flex;align-items:center;justify-content:center;background:var(--ink);color:#fff;border-radius:8px;padding:15px 22px;min-height:48px;text-decoration:none;font-size:14px;font-weight:600;margin:22px 0 40px}.rules-wide ul{padding-left:20px}.rules-main .rule-number{font:12px var(--number);color:var(--orange)}
@media(min-width:1000px){.game-panel{padding-left:39px;padding-right:39px}.puzzle-board{border-spacing:6px}.puzzle-board .weight-column{width:35px}.puzzle-board .sum-column{width:72px}}
@media(max-width:900px){.site-header,main,.site-footer{width:min(820px,calc(100% - 40px))}.play-layout{grid-template-columns:minmax(0,1fr) 210px;gap:28px}.game-panel{padding:20px}.rule-rail h2{font-size:28px}.rule-rail p{font-size:11px}.mini-example{width:180px}.puzzle-board .sum-column{width:59px}.sum{font-size:17px}.cell{border-radius:6px}.puzzle-board{border-spacing:4px}.rule-rail{padding-top:20px}}
@media(max-width:700px){.site-header,main,.site-footer{width:calc(100% - 32px)}.site-header{height:79px}.wordmark{font-size:26px}.how-link{font-size:12px}.how-link span{margin-left:8px}.page-heading{margin:28px 0 22px;align-items:flex-start}h1{font-size:38px}.eyebrow{font-size:8px;letter-spacing:1.6px;margin-bottom:10px}.edition{padding-top:3px;gap:5px}.edition time{font-size:11px}.edition>span:first-child{font-size:8px;letter-spacing:1.2px}.edition>span:last-child{font-size:9px;max-width:100px;line-height:1.4}.play-layout{display:block}.game-panel{padding:18px 16px 15px;border-radius:13px}.puzzle-meta{font-size:10px}.mode-switch button{padding:7px 14px}.board-topline{margin-top:23px;font-size:9px;padding-left:0}.puzzle-board .weight-column{width:24px}.puzzle-board .sum-column{width:60px}.puzzle-board tbody th{font-size:14px;padding-left:0}.puzzle-board thead th{font-size:14px}.sum{font-size:18px}.sum .current,.sum .slash{font-size:11px}.entry-controls{margin-top:18px}.rule-rail{margin-top:29px;display:grid;grid-template-columns:1fr 1fr;column-gap:22px;border-top:1px solid var(--line);padding-top:24px}.rule-rail h2{font-size:26px;margin:15px 0 7px}.rule-rail h2 br{display:none}.rule-rail>p:first-of-type{grid-column:1;grid-row:3;margin-top:7px}.mini-example{grid-column:2;grid-row:2/4;width:100%;max-width:195px;align-self:center;margin:18px 0}.rule-rail .rule-emphasis{grid-column:1/-1;margin:10px 0 0}.rule-rail>p:nth-of-type(3){grid-column:1/-1;max-width:none;margin:6px 0}.rail-link{grid-column:1/-1;justify-self:start}.keyboard-help{grid-column:1/-1;margin-top:22px;width:100%}.keyboard-help p{max-width:none}.rail-bottom{display:none}.below-game{margin-top:28px;margin-bottom:30px}.below-game h2{font-size:22px}.site-footer{font-size:9px;flex-wrap:wrap;gap:12px}.site-footer span:nth-child(2){margin-left:auto}.site-footer a{flex-basis:100%}.rules-heading{margin-top:32px}.rules-heading h1{font-size:40px}.rules-content{grid-template-columns:1fr;gap:18px}.rules-intro{font-size:14px}.rule-block{padding:22px}.rules-wide{grid-column:auto}.win-panel{padding:12px;gap:9px;flex-wrap:wrap}.win-panel h2{font-size:20px}.win-panel button{padding:0 4px}.mark-switch button{min-height:44px}}
@media(max-width:380px){.site-header,main,.site-footer{width:calc(100% - 24px)}.wordmark{font-size:23px}.brand-mark{margin-right:8px}h1{font-size:33px}.game-panel{padding:15px 10px}.puzzle-board{border-spacing:3px}.puzzle-board .weight-column{width:20px}.puzzle-board .sum-column{width:53px}.sum{font-size:16px}.sum .current,.sum .slash{font-size:10px}.cell{min-height:36px}.entry-controls{gap:6px}.mark-switch button{padding:8px}.action-row{gap:6px}.action-row button{font-size:11px}.action-row button span{margin-right:2px}.practice-controls{gap:7px;font-size:11px}.text-button{font-size:11px}.edition>span:last-child{max-width:85px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.board-topline,.board-scroller,.board-bottomline{max-width:410px;margin-left:auto;margin-right:auto}.board-topline{margin-top:20px}.entry-controls{margin-top:15px;padding-top:12px}.game-message{margin-top:10px;min-height:32px}

.storage-action{border:1px solid var(--line);border-radius:6px;background:var(--white);color:var(--ink);padding:10px 14px;min-height:44px;margin:8px 0;font-size:12px}#storage-confirm{width:min(420px,calc(100% - 32px));border:1px solid var(--line);border-radius:14px;padding:26px;color:var(--ink);background:var(--white)}#storage-confirm::backdrop{background:#132b3b70}#storage-confirm h2{font:26px Georgia,serif;margin:0 0 16px}#storage-confirm p{font-size:14px;line-height:1.7}#storage-confirm .dialog-actions{display:flex;justify-content:flex-end;flex-wrap:wrap;gap:10px;margin-top:22px}#storage-confirm button{min-height:44px;border:1px solid var(--line);border-radius:7px;padding:10px 15px;background:var(--white);color:var(--ink)}#storage-confirm button[value=confirm]{background:var(--ink);color:white}

.mode-switch button{min-height:44px}.daily-notice{font-size:12px;line-height:1.6;margin-top:12px}.daily-notice p{margin:0}