@font-face{font-family:Dela Gothic One;src:url(/fonts/dela-gothic-one-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}@font-face{font-family:Zen Kaku Gothic New;src:url(/fonts/zen-kaku-gothic-new-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}@font-face{font-family:Zen Kaku Gothic New;src:url(/fonts/zen-kaku-gothic-new-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}@font-face{font-family:Zen Kaku Gothic New;src:url(/fonts/zen-kaku-gothic-new-latin-700-normal.woff2) format("woff2");font-weight:700;font-display:swap}@font-face{font-family:IBM Plex Mono;src:url(/fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2");font-weight:400;font-display:swap}@font-face{font-family:IBM Plex Mono;src:url(/fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2");font-weight:500;font-display:swap}:root{--desk:#E4E6EE;--mat:#D8DBE7;--ink:#1D2140;--ink-soft:#585D7E;--accent:#3347A6;--accent-ink:#FFFFFF;--stamp:#C33A2E;--line:rgba(29,33,64,.14);--panel:#F2F3F8;--shadow:rgba(20,24,52,.2);--paper:#FCFCF9;--paper-back:#EEEDE6;--edge1:#D5D3CA;--edge2:#BAB8AE;--tile-line:rgba(29,33,64,.1);--tile-ink:#1D2140;--tile-ink-inv:#FFFFFF;--me:rgba(51,71,166,.12);--p2:#FCFCF9;--p4:#E1ECF8;--p8:#D7EEE0;--p16:#F5EAC0;--p32:#F7D5BA;--p64:#F2C0C9;--p128:#D7CAEF;--p256:#A2B2EA;--p512:#5064C4;--p1024:#2C3170;--p2048:#C33A2E;--f-display:"Dela Gothic One","Arial Black",Impact,sans-serif;--f-body:"Zen Kaku Gothic New","Hiragino Sans","Segoe UI",system-ui,sans-serif;--f-mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;color-scheme:light}@media(prefers-color-scheme:dark){:root{--desk:#121529;--mat:#1A1E38;--ink:#E9EAF3;--ink-soft:#A2A6C4;--accent:#8F9DF2;--accent-ink:#121529;--stamp:#E35B4F;--line:rgba(233,234,243,.14);--panel:#1A1E38;--shadow:rgba(0,0,0,.55);--paper-back:#D8D6CE;--edge1:#A8A69D;--edge2:#8A887F;--me:rgba(143,157,242,.16);color-scheme:dark}}*{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0}html{touch-action:manipulation;-webkit-text-size-adjust:100%}body{background:var(--desk);color:var(--ink);font-family:var(--f-body);font-size:16px;line-height:1.55;-webkit-tap-highlight-color:transparent}.app{max-width:640px;margin:0 auto;padding-block:max(16px,env(safe-area-inset-top,0px)) 40px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));display:flex;flex-direction:column;gap:22px}a{color:var(--accent)}button{font-family:inherit}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.top-bar{display:flex;align-items:center;gap:10px 14px;flex-wrap:wrap}.mark{font-family:var(--f-display);font-size:28px;letter-spacing:.06em;line-height:1;text-decoration:none;margin-right:auto;background:linear-gradient(90deg,var(--ink) 50%,var(--ink-soft) 50%);-webkit-background-clip:text;background-clip:text;color:transparent}.tabs,.seg{display:flex;border:1px solid var(--line);border-radius:999px;padding:3px;gap:2px}.tabs button,.seg button{font:500 14px var(--f-body);color:var(--ink-soft);background:none;border:0;border-radius:999px;padding:6px 14px;cursor:pointer}.tabs button[aria-selected=true],.seg button[aria-selected=true]{background:var(--ink);color:var(--desk)}.seg.wide{align-self:flex-start}.icon-btn{display:grid;place-items:center;width:34px;height:34px;border-radius:999px;border:1px solid var(--line);background:var(--panel);color:var(--ink);cursor:pointer;padding:0}.icon-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.icon-btn .off,.icon-btn[aria-pressed=false] .on{display:none}.icon-btn[aria-pressed=false] .off{display:block}.icon-btn[aria-pressed=false]{color:var(--ink-soft)}.me-chip{font:500 13px var(--f-mono);color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 12px;cursor:pointer;max-width:170px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.practice-bar{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;background:var(--panel);border:1px dashed var(--accent);border-radius:10px;padding:8px 12px;font-size:14px;margin-bottom:14px}.head-row{display:flex;justify-content:space-between;align-items:flex-end;gap:12px 20px;flex-wrap:wrap}.stage{display:flex;flex-direction:column;justify-content:center;gap:16px;text-align:center}.stage .head-row{flex-direction:column;align-items:center;gap:12px}.stage .stats{justify-content:center;gap:28px}.stage .mat,.stage .actions{margin-top:0}.stage .practice-bar{text-align:left;margin-bottom:0}#daily-view.done .stage,#endless-view.done .stage{min-height:0!important}.eyebrow{font:500 12px var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin:0 0 4px}.goal{font:700 20px/1.3 var(--f-body);margin:0;text-wrap:balance}.stats,.streak-row{display:flex;gap:20px;flex-wrap:wrap}.stat{font:400 11px var(--f-mono);letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft)}.stat b{display:block;font:500 22px/1.2 var(--f-mono);color:var(--ink);letter-spacing:0;font-variant-numeric:tabular-nums}.mat{background-color:var(--mat);border-radius:14px;padding-block:28px 18px;padding-inline:14px;margin-top:14px;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:24px 24px;background-position:-1px -1px}.track{position:relative;perspective:1100px;margin:0 auto;min-height:60px}.cell{position:absolute;top:0;display:grid;place-items:center;background:var(--tint,var(--paper));color:var(--tile-ink);font-family:var(--f-display);font-size:calc(var(--size) * .36);line-height:1;border-radius:3px;outline:1px solid var(--tile-line);outline-offset:-1px;transition:left .3s cubic-bezier(.2,.8,.2,1),transform .18s ease;font-variant-numeric:tabular-nums;-webkit-user-select:none;user-select:none}.cell.inv{color:var(--tile-ink-inv)}.cell[data-d="3"]{font-size:calc(var(--size) * .29)}.cell[data-d="4"]{font-size:calc(var(--size) * .23)}.cell.lift{transform:translateY(-5px)}.track.aiming .cell.lift{transform:translateY(-9px)}.crease{position:absolute;top:-14px;transform:translate(-50%);-webkit-user-select:none;user-select:none;background:none;border:0;padding:0;cursor:pointer;z-index:3;border-radius:4px;touch-action:manipulation}.crease:before{content:"";position:absolute;left:50%;top:8px;bottom:8px;border-left:2px dashed var(--accent);opacity:.4;transform:translate(-50%);transition:opacity .15s}.crease:hover:before,.crease:focus-visible:before{opacity:1}.crease.sel:before{opacity:1;border-left:3px solid var(--accent)}.crease.sel:after{content:"";position:absolute;left:50%;top:6px;width:12px;height:12px;border-radius:50%;background:var(--accent);transform:translate(-50%,-50%);box-shadow:0 0 0 4px #3347a640;box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 25%,transparent)}.next-cell{display:flex;flex-direction:column;align-items:center;gap:6px}.next-cell .eyebrow{margin:0}.next-row{display:flex;align-items:center;gap:10px}.next-v{width:44px;height:44px;border-radius:4px;font-size:16px;box-shadow:0 2px 6px var(--shadow)}.side-btn{font:500 14px var(--f-body);min-height:44px;padding:0 14px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--ink-soft);cursor:pointer}.side-btn[aria-pressed=true]{background:var(--ink);color:var(--desk);border-color:transparent}.side-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.scrap{position:absolute;width:7px;height:10px;border-radius:1px;z-index:6;pointer-events:none;box-shadow:0 1px 0 var(--edge1)}.crease.hint:before{opacity:1;border-left-width:3px;animation:hint 1.1s ease-in-out infinite}@keyframes hint{50%{opacity:.3}}.rules .lesson{margin:6px 0}.rules .lesson .mat{margin-top:6px}.rules .lead{font:700 18px/1.3 var(--f-body);color:var(--ink)}body.tutoring #daily-view,body.tutoring #endless-view,body.tutoring #boards-view{display:none}body.tutoring .top-bar{order:-2}body.tutoring .rules{order:-1;border-top:0;padding-top:0}body.tutoring .rules h3{font:700 12px var(--f-mono)}.flap{position:absolute;top:0;transform-style:preserve-3d;z-index:5;pointer-events:none}.face{position:absolute;top:0;right:0;bottom:0;left:0;backface-visibility:hidden;-webkit-backface-visibility:hidden}.back{transform:rotateY(180deg);border-radius:3px;box-shadow:0 8px 18px var(--shadow);background:repeating-linear-gradient(90deg,var(--paper-back) 0 calc(var(--size) - 1px),var(--edge1) calc(var(--size) - 1px) var(--size))}.msg{min-height:1.5em;margin:12px 0 0;font-size:14px;color:var(--ink-soft);text-align:center}.msg.warn{color:var(--stamp)}.msg.good{color:var(--ink);font-weight:700}.form-msg{text-align:left;margin-top:8px}.actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-top:14px}.actions.left{justify-content:flex-start;margin-top:0}.btn{font:500 15px var(--f-body);padding:9px 20px;border-radius:999px;border:1px solid var(--line);background:transparent;color:var(--ink);cursor:pointer}.btn:hover{border-color:var(--ink-soft)}.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:transparent}.btn.arm{border-color:var(--stamp);color:var(--stamp);font-weight:700}.btn:disabled{opacity:.5;cursor:default}.link{background:none;border:0;padding:0;color:var(--accent);font:500 14px var(--f-body);cursor:pointer;text-decoration:underline;text-underline-offset:3px}.result{display:flex;flex-direction:column;gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px;margin-top:16px}.result-head{display:flex;gap:18px;align-items:flex-start}.stamp{flex:none;width:62px;height:62px;border:3px solid var(--stamp);color:var(--stamp);border-radius:9px;display:grid;place-items:center;font:700 34px/1 var(--f-body);transform:rotate(-8deg);margin-top:4px}.stamp.fail{font-size:28px}.result h2{font:400 24px/1.2 var(--f-display);margin:0}.result p{margin:4px 0 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.panel{margin-top:18px}#boards-view{display:flex;flex-direction:column;gap:14px}#boards-view[hidden]{display:none}.board{list-style:none;margin:0;padding:0;display:flex;flex-direction:column}.board li{display:grid;grid-template-columns:2.4em minmax(0,1fr) auto;gap:4px 10px;align-items:center;padding:7px 6px;border-top:1px solid var(--line);font-size:15px}.board li:first-child{border-top:0}.board li.me{background:var(--me);border-radius:8px;font-weight:700}.board li.gap{display:block;text-align:center;color:var(--ink-soft);padding:2px;border:0}.board .rk{font:500 13px var(--f-mono);color:var(--ink-soft);font-variant-numeric:tabular-nums}.board .nm{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.board .sc{font:500 13px var(--f-mono);font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}.board .more{grid-column:2 / -1;display:flex;gap:12px;align-items:center}.board .dots{background:none;border:0;color:var(--ink-soft);cursor:pointer;font-size:16px;padding:0 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h3{font:500 12px var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);margin:0}.rules p{margin:0}.mini{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:6px 0 4px}.mstrip{display:flex}.mcell{width:36px;height:36px;display:grid;place-items:center;background:var(--tint);color:var(--tile-ink);font:13px/1 var(--f-display);outline:1px solid var(--tile-line);outline-offset:-1px}.mcell.cut{border-right:2px dashed var(--accent)}.arrow{color:var(--ink-soft);font-family:var(--f-mono)}.foot{font-size:13px;color:var(--ink-soft)}dialog{border:1px solid var(--line);border-radius:16px;background:var(--panel);color:var(--ink);padding:22px;width:min(440px,calc(100vw - 32px));box-shadow:0 20px 50px var(--shadow)}dialog::backdrop{background:#0a0c1e73}dialog h2{font:400 22px/1.2 var(--f-display);margin:0 0 14px}dialog h3{font:500 12px var(--f-mono);letter-spacing:.1em;text-transform:uppercase;color:var(--ink-soft);margin:18px 0 8px}dialog .streak-row{margin-top:12px}.dialog-close{position:absolute;top:14px;right:16px}.dist{display:flex;flex-direction:column;gap:4px;margin-bottom:12px}.dist .bar{display:grid;grid-template-columns:2.2em 1fr;gap:8px;align-items:center;font:500 13px var(--f-mono)}.dist .fill{background:var(--ink-soft);color:var(--desk);border-radius:4px;padding:1px 6px;min-width:1.8em;text-align:right;font-variant-numeric:tabular-nums}.dist .fill.hi{background:var(--accent);color:var(--accent-ink)}@media(max-width:460px){.goal{font-size:18px}.mat{padding-inline:6px}.tabs button{padding:6px 9px}.top-bar{gap:10px 8px}.me-chip{max-width:96px;padding:6px 10px}.stats{gap:16px}}@media(prefers-reduced-motion:reduce){.cell,.crease:before{transition:none}.crease.hint:before{animation:none}}#b-leagues-panel{display:flex;flex-direction:column;gap:14px}@media(pointer:coarse){.btn{min-height:44px;padding-inline:22px}.tabs button,.seg button{min-height:38px}.link{display:inline-block;padding:10px 4px;margin:-10px -4px}.icon-btn{width:40px;height:40px}.actions{gap:12px}}@media(min-width:900px){.app{max-width:780px}.stage{gap:20px}.stage .goal{font-size:26px}.stage .eyebrow{font-size:13px}.stage .stat b{font-size:26px}.stage .mat{padding-block:36px 22px}}