:root{color-scheme:light;--desk:#EAF1FC;--paper:#fff;--ink:#142745;--cobalt:#1746C3;--quiet:#53647D;--line:#CBD7EC;--wash:#F3F6FD;--focus:#8C3500;--amber:#814C08;--amber-bg:#FFF4DA;--green:#196044;--green-bg:#E4F3ED;--shadow:0 15px 35px -24px #1746c350}
*{box-sizing:border-box}body{margin:0;background:var(--desk);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;font-size:15px;line-height:1.5}button,input,textarea{font:inherit}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.55}a{color:var(--cobalt);text-underline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,[tabindex="-1"]:focus-visible{outline:3px solid var(--focus);outline-offset:4px}button{color:inherit}h1,h2,h3,p{margin:0}button{touch-action:manipulation}.wrap{width:min(1352px,100% - 96px);margin-inline:auto}.site-header{height:96px;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:750;color:var(--ink);font-size:18px;letter-spacing:-.6px}.brand-mark{display:grid;grid-template-columns:repeat(2,8px);gap:3px;transform:rotate(-7deg)}.brand-mark i{height:8px;border:2px solid var(--cobalt);border-radius:2px}.brand-mark i:last-child{background:var(--cobalt)}.notebook-label{color:var(--quiet);font-size:13px}.notebook-label span,.site-footer span span{margin-inline:14px;color:var(--cobalt)}.hero{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:60px 0 52px}.intro{color:var(--cobalt);font-size:16px;margin-bottom:6px}h1{font-family:"Trebuchet MS",sans-serif;font-size:clamp(64px,8.1vw,120px);letter-spacing:-.075em;line-height:1.07;font-weight:700;color:var(--cobalt)}.title-period{display:inline-block;margin-left:.02em}.hero-caption{font-size:19px;color:var(--quiet);margin-top:20px;letter-spacing:-.2px}.hero-note{max-width:268px;border-left:1px solid var(--line);padding:12px 0 12px 28px;flex-shrink:0}.hero-note p{font-size:18px;line-height:1.5;letter-spacing:-.3px}.note-mark{display:block;color:var(--cobalt);font-size:26px;margin-bottom:8px}.note-tail{display:block;font-size:12px;color:var(--quiet);margin-top:15px;max-width:205px}.workspace{padding-top:22px;border-top:1px solid var(--line)}.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:18px}.workspace-heading h2{font-family:"Trebuchet MS",sans-serif;font-size:25px;letter-spacing:-.8px}.mode-switch{display:flex;border:1px solid var(--line);padding:4px;border-radius:10px;gap:3px;background:#e3ebfa}.mode-switch button{border:0;border-radius:6px;padding:10px 17px;background:transparent;color:var(--quiet);font-size:13px;font-weight:650}.mode-switch button[aria-pressed=true]{background:var(--paper);color:var(--cobalt);box-shadow:0 2px 4px #1427450a}.mode-note{display:flex;gap:9px;align-items:flex-start;min-height:54px;padding:17px 0;font-size:13px;color:var(--quiet)}.mode-dot{height:7px;width:7px;border-radius:50%;background:var(--cobalt);flex-shrink:0;margin-top:6px}.mode-note.example-note{color:var(--amber)}.example-note .mode-dot{background:var(--amber)}.workbench{display:grid;grid-template-columns:minmax(0,1fr) 288px;gap:28px;align-items:start}.sheet{background:var(--paper);border:2px solid var(--cobalt);border-radius:17px 17px 23px 17px;padding:13px 20px 0;box-shadow:var(--shadow);transform:rotate(-.35deg)}.column-labels{display:grid;grid-template-columns:repeat(3,1fr);font-size:12px;color:var(--cobalt);text-align:center;padding-bottom:10px;font-weight:650}.bingo-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--cobalt);border-left:1px solid var(--cobalt);border-radius:10px;overflow:hidden}.cell{position:relative;min-width:0;min-height:206px;background:var(--paper);border:0;border-right:1px solid var(--cobalt);border-bottom:1px solid var(--cobalt);padding:16px;text-align:left;display:flex;flex-direction:column;align-items:flex-start;justify-content:flex-start;gap:12px;transition:background .14s}.cell:hover{background:var(--wash)}.cell[aria-pressed=true]{background:#edf2ff;box-shadow:inset 0 0 0 3px var(--cobalt)}.cell:focus-visible{z-index:1;outline-offset:-6px}.cell-coordinate{font-size:12px;font-weight:700;color:var(--cobalt);line-height:1}.empty-mark{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:36px;height:36px;border:1px dashed #a8bce6;border-radius:50%;display:grid;place-items:center;font-size:25px;font-weight:300;color:#839ccc}.cell-empty .cell-caption{margin-top:auto;color:var(--quiet);font-size:11px;font-weight:400;line-height:1.3}.cell-title{font-family:"Trebuchet MS",sans-serif;font-size:21px;letter-spacing:-.6px;line-height:1.15;overflow-wrap:anywhere}.cell .status-chip{margin-top:auto;font-size:10px;max-width:100%}.cell-demo-tag{position:absolute;right:12px;top:13px;font-size:10px;color:var(--amber)}.status-chip{display:inline-flex;align-items:center;gap:5px;line-height:1.4;padding:5px 8px;border-radius:20px;background:var(--wash);color:var(--cobalt);font-size:12px}.status-chip.verified{color:var(--green);background:var(--green-bg)}.status-chip.working{color:var(--amber);background:var(--amber-bg)}.sheet-footer{display:flex;gap:12px;justify-content:space-between;padding:13px 0;color:var(--cobalt);font-size:10px}.board-tools{display:flex;align-items:center;gap:12px;padding:23px 0 12px}.board-tools>span{color:var(--quiet);font-size:11px}.text-button{display:inline-flex;align-items:center;gap:9px;justify-content:center;border:0;padding:6px 0;background:transparent;font-size:13px;font-weight:650;color:var(--cobalt);text-decoration:none}.text-button:hover{text-decoration:underline;text-underline-offset:4px}.refresh{margin-left:auto;white-space:nowrap}.freshness{font-size:11px;color:var(--quiet);line-height:1.7}.freshness .fetch-error{color:#9b321c}.inspector{border-top:2px solid var(--cobalt);padding-top:17px}.inspector-heading{display:flex;justify-content:space-between;align-items:center;color:var(--cobalt);margin-bottom:26px}.selection-label{font-size:13px;font-weight:650;color:var(--cobalt)}.inspector-icon{font-size:22px;line-height:1}.inspector h3{font-family:"Trebuchet MS",sans-serif;font-size:32px;line-height:1.12;letter-spacing:-1px;margin-bottom:17px;overflow-wrap:anywhere}.inspector-content p,#inspector-content>p{color:var(--quiet);font-size:14px;line-height:1.65;margin:14px 0}.inspector-section{border-top:1px solid var(--line);padding-top:16px;margin-top:24px}.inspector-section h4{font-size:12px;font-weight:650;margin:0 0 10px}.inspector-section p{color:var(--quiet);font-size:12px;line-height:1.7;margin:0 0 8px;overflow-wrap:anywhere}.inspector-section ul{padding-left:18px;margin:0}.inspector-section li{margin:12px 0;overflow-wrap:anywhere}.inspector-section time{display:block;color:var(--quiet);font-size:11px;margin-top:3px}.draft-preview{white-space:pre-wrap;overflow-wrap:anywhere}.inspector-actions{margin-top:26px}.primary-button{padding:12px 17px;background:var(--cobalt);color:var(--paper);border:1px solid var(--cobalt);border-radius:7px;font-size:13px;font-weight:650;display:inline-flex;justify-content:center;gap:20px;align-items:center;min-height:44px}.primary-button:hover{background:#12399f}.inspector-actions .primary-button{width:100%;justify-content:space-between}.local-note{display:flex;gap:12px;margin-top:21px;color:var(--quiet);font-size:11px;line-height:1.6}.local-note>span{font-size:22px;line-height:1}.back-button{display:none}.bottom-note{display:flex;justify-content:space-between;align-items:center;gap:30px;border-top:1px solid var(--line);padding:32px 0 16px;margin-top:39px}.bottom-note>div{display:grid;grid-template-columns:30px 1fr;column-gap:10px;max-width:550px}.foot-symbol{font-size:24px;line-height:1;color:var(--cobalt);grid-row:span 2}.bottom-note h2{font-family:"Trebuchet MS",sans-serif;font-size:20px;letter-spacing:-.4px}.bottom-note p{font-size:12px;color:var(--quiet);margin-top:8px;max-width:420px}.bottom-note>button{flex-shrink:0}.storage-state{color:var(--quiet);font-size:11px;padding-bottom:20px}.site-footer{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:22px 0 30px;font-size:11px;color:var(--quiet)}.notice{padding:20px;border:1px solid var(--amber);margin-top:20px;color:var(--amber);background:var(--amber-bg);border-radius:8px}.grid-wait{grid-column:1/-1;padding:30px;min-height:300px;color:var(--quiet)}dialog{background:var(--paper);color:var(--ink);border:2px solid var(--cobalt);border-radius:16px;padding:28px;width:min(520px,100% - 32px);max-height:calc(100dvh - 40px);overflow-y:auto;box-shadow:0 28px 90px #14274530}dialog::backdrop{background:#14274575;backdrop-filter:blur(3px)}.dialog-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.close-button{border:0;background:var(--wash);width:40px;height:40px;border-radius:50%;font-size:25px;line-height:1;color:var(--cobalt)}dialog h2{font-family:"Trebuchet MS",sans-serif;font-size:32px;line-height:1.15;letter-spacing:-.9px;margin-bottom:12px}dialog>p,dialog form>p{font-size:13px;color:var(--quiet);margin:12px 0 20px}dialog label{display:block;font-size:13px;font-weight:650;margin:20px 0 8px}input,textarea{display:block;width:100%;border:1px solid #8297ba;border-radius:6px;padding:12px;color:var(--ink);background:var(--paper)}textarea{resize:vertical;min-height:120px}input::placeholder,textarea::placeholder{color:var(--quiet)}.dialog-note{font-size:11px!important;color:var(--quiet);line-height:1.7}.dialog-actions{display:flex;justify-content:flex-end;gap:12px;margin-top:24px}.secondary-button{background:transparent;border:1px solid var(--line);border-radius:7px;padding:11px 17px;font-size:13px}.gap-list{list-style:none;padding:0;margin:18px 0}.gap-list li{padding:12px 0;border-top:1px solid var(--line);font-size:13px;line-height:1.6}.gap-list li strong{color:var(--cobalt);margin-right:10px}.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;top:10px;left:16px;opacity:0;pointer-events:none;z-index:10;background:var(--paper);padding:12px;border:2px solid var(--cobalt)}.skip-link:focus{opacity:1;pointer-events:auto}[hidden]{display:none!important}
@media(min-width:1450px){.cell{min-height:224px}}
@media(max-width:1100px){.wrap{width:calc(100% - 64px)}.workbench{grid-template-columns:minmax(0,1fr) 250px;gap:22px}.cell{min-height:185px;padding:13px}.cell-title{font-size:18px}.hero-note{max-width:235px;padding-left:24px}.hero-note p{font-size:16px}.board-tools>span{display:none}}
@media(max-width:860px){.hero{padding:40px 0}.hero-note{max-width:210px}.workbench{grid-template-columns:1fr}.inspector{display:grid;grid-template-columns:1fr 1fr;column-gap:32px;padding-top:20px}.inspector-heading{grid-column:1/-1;margin-bottom:17px}.inspector h3{grid-column:1/-1}.inspector-content,#inspector-content{grid-column:1}.inspector-actions{grid-column:2;grid-row:3;align-self:start;margin-top:10px}.local-note{grid-column:2;grid-row:4;margin-top:0}.back-button{display:inline-flex;margin-top:16px}.cell{min-height:195px}.cell-title{font-size:23px}.cell-empty .cell-caption{font-size:12px}.bottom-note{margin-top:30px}.hero-note .note-tail{font-size:11px}.site-footer{font-size:10px}.inspector-section{margin-top:20px}}
@media(max-width:600px){.wrap{width:calc(100% - 32px)}.site-header{height:72px}.brand{font-size:16px}.notebook-label{font-size:10px;max-width:105px;text-align:right}.notebook-label span{margin:0 4px}.hero{display:block;padding:32px 0 30px}.intro{font-size:13px;margin-bottom:9px}h1{font-size:clamp(48px,13.6vw,80px);letter-spacing:-.075em}.hero-caption{font-size:15px;margin-top:13px}.hero-note{max-width:none;margin-top:24px;padding:0;border:0;display:flex;align-items:center;gap:12px}.hero-note p{font-size:12px;line-height:1.6}.hero-note p br{display:none}.hero-note .note-mark{font-size:22px;margin:0}.hero-note .note-tail{display:none}.workspace{padding-top:18px}.workspace-heading{display:block}.workspace-heading h2{font-size:23px;margin-bottom:15px}.mode-switch{width:100%}.mode-switch button{flex:1;padding:10px 8px;font-size:12px}.mode-note{min-height:75px;font-size:12px;padding:15px 0}.sheet{padding:10px 10px 0;border-radius:13px;transform:none}.column-labels{font-size:11px;padding-bottom:9px}.cell{min-height:143px;padding:11px 9px;gap:13px}.cell-coordinate{font-size:10px}.cell-title{font-size:15px;letter-spacing:-.35px;line-height:1.2}.cell-empty .cell-caption{font-size:9px;line-height:1.35;max-width:65px}.empty-mark{height:28px;width:28px;font-size:20px}.cell-demo-tag{font-size:8px;right:7px;top:9px}.cell .status-chip{font-size:9px;padding:3px 4px;gap:3px}.sheet-footer{font-size:9px;padding:11px 0}.board-tools{padding-top:17px;font-size:12px}.board-tools .text-button{font-size:12px}.freshness{font-size:10px}.workbench{gap:28px}.inspector{display:block;padding-top:17px}.inspector h3{font-size:30px}.inspector-heading{margin-bottom:18px}.inspector-actions{margin-top:22px}.local-note{margin-top:18px;max-width:270px}.bottom-note{display:block;padding-top:26px}.bottom-note>button{margin-top:20px}.site-footer{display:block;padding-bottom:24px}.site-footer>span{display:block;margin-bottom:8px}dialog{padding:22px}.storage-state{max-width:65ch}.cell:focus-visible{outline-offset:-5px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;scroll-behavior:auto!important}}