:root{color:#263440;font-synthesis:none;background:#f6f8fb;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-weight:400;line-height:1.5}*{box-sizing:border-box}body{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible{outline-offset:3px;outline:3px solid #608fae}h1,h2,h3,p{margin:0}h1{letter-spacing:-.045em;font-size:clamp(1.6rem,4vw,2.25rem);line-height:1.2}h2{letter-spacing:-.025em;font-size:1.25rem}svg{flex-shrink:0;width:19px;height:19px}.app-shell{width:min(100%,780px);padding:28px 24px max(28px,env(safe-area-inset-bottom));margin:0 auto}header{justify-content:space-between;align-items:center;gap:12px;margin-bottom:26px;display:flex}nav{gap:7px;display:flex}.icon-button{color:#526170;background:#fff;border:1px solid #d8e0e8;border-radius:11px;place-items:center;width:42px;height:42px;display:grid}.icon-button:hover,.secondary:hover{background:#eef2f6}.session-bar{justify-content:space-between;align-items:center;min-height:38px;margin-bottom:14px;display:flex}.next-number{align-items:center;gap:10px;display:flex}.next-number strong{font-size:1.55rem;font-weight:650;line-height:1}.muted{color:#657481;font-size:.875rem}.timer{font-variant-numeric:tabular-nums;letter-spacing:-.025em;font-size:1.4rem}.board{background:#dce3ea;border:1px solid #ced8e1;border-radius:12px;grid-template-columns:repeat(10,minmax(0,1fr));gap:1px;display:grid;overflow:hidden}.number{aspect-ratio:1;color:#263440;font-variant-numeric:tabular-nums;isolation:isolate;background:#fff;border:0;place-items:center;min-width:0;min-height:44px;padding:0;font-size:clamp(1rem,2.6vw,1.5rem);font-weight:500;display:grid;position:relative}.number:focus-visible{outline-offset:-4px;z-index:2}.number.marked{color:#8a98a5;cursor:default;background:#eff3f6}.number.marked:after,.number.marked:before{content:"";background:#718896;border-radius:2px;width:52%;height:2px;position:absolute;top:calc(50% - 1px);left:24%;transform:rotate(45deg)}.number.marked:after{transform:rotate(-45deg)}.number.wrong{background:#fbe5e2}.board-footer{justify-content:space-between;align-items:center;gap:14px;margin-top:18px;display:flex}.board-footer p{color:#657481;font-size:.875rem}.board-actions,.modal-actions{gap:8px;display:flex}.primary,.secondary{border:1px solid #263440;border-radius:10px;justify-content:center;align-items:center;gap:8px;min-height:44px;padding:10px 16px;font-size:.875rem;font-weight:600;display:inline-flex}.primary{color:#fff;background:#263440}.primary:hover{background:#3d4e5c}.secondary{color:#526170;background:#fff;border-color:#d8e0e8}.secondary svg{width:16px}.history-link{text-underline-offset:4px;width:fit-content;margin:16px auto 0;font-size:.875rem;text-decoration:underline;display:block}.section-heading{justify-content:space-between;align-items:center;margin:12px 0 22px;display:flex}.best{background:#eaf2f7;border:1px solid #d4e1ea;border-radius:12px;justify-content:space-between;align-items:center;padding:20px;display:flex}.best strong{font-variant-numeric:tabular-nums;font-size:1.6rem}.history-list{margin:16px 0;padding:0;list-style:none}.history-list li{border-bottom:1px solid #dce3ea;justify-content:space-between;align-items:center;gap:20px;padding:18px 4px;display:flex}.history-list small{color:#657481;margin-top:3px;display:block}.history-list strong{font-variant-numeric:tabular-nums;font-weight:600}.history-footnote{color:#657481;margin-top:24px;font-size:.875rem}.empty{text-align:center;justify-items:center;gap:12px;padding:65px 12px;display:grid}.empty>svg{color:#718896;width:30px;height:30px}.empty h3{font-size:1.1rem}.empty p{color:#657481}.empty a{margin-top:12px}dialog{color:#263440;border:0;border-radius:18px;width:min(420px,100% - 32px);max-height:calc(100dvh - 32px);padding:0;box-shadow:0 24px 80px #19222c40}dialog::backdrop{-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#14202770}.dialog-content{gap:18px;padding:24px;display:grid}.dialog-heading{justify-content:space-between;align-items:center;gap:12px;display:flex}.dialog-heading .icon-button{flex-shrink:0}.qr{justify-self:center;width:min(240px,100%)}.share-url{color:#526170;background:#f6f8fb;border:1px solid #d8e0e8;border-radius:8px;width:100%;min-width:0;padding:12px;font-size:16px}.modal-actions{justify-content:flex-end}@media (hover:hover){.number:not(.marked):hover{background:#edf4f8}}@media (width<=600px){.app-shell{padding:20px 10px max(24px,env(safe-area-inset-bottom))}header{margin-bottom:22px;padding:0 4px}.session-bar{padding:0 4px}.board{border-radius:9px}.number{aspect-ratio:auto;height:clamp(44px,6.7dvh,60px);font-size:clamp(.875rem,4vw,1.2rem)}.board-footer{text-align:center;flex-direction:column;gap:14px;margin-top:16px}.board-actions{justify-content:center}.history-page{padding:0 6px}.timer{font-size:1.25rem}.dialog-content{padding:20px}}@media (prefers-reduced-motion:no-preference){.number{transition:background .15s,color .15s}}.share-close{background:0 0;border:0}