:root{color-scheme:dark;font-family:Trebuchet MS,Arial,sans-serif;background:#071210;color:#eef4e9;font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:280px;min-height:100vh;background:radial-gradient(ellipse at 80% 5%,#193c30 0,transparent 38%),#071210}button,input{font:inherit}button{cursor:pointer}a{color:inherit}:focus-visible{outline:3px solid #fbcc6d;outline-offset:3px}::selection{background:#bef37b;color:#071210}.site-shell{width:min(100% - 2.5rem,1140px);margin:0 auto}.site-header{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1.45rem 0;border-bottom:1px solid #31534a}.wordmark{font-size:1.15rem;font-weight:900;letter-spacing:-.06em;text-decoration:none;white-space:nowrap}.wordmark span{color:#bdf375;padding:0 .1em}.site-header nav{display:flex;flex-wrap:wrap;gap:clamp(.8rem,3vw,2rem)}.site-header nav a,.text-link{font-size:.9rem;text-decoration:none;border-bottom:1px solid transparent}.site-header nav a:hover,.text-link:hover{border-bottom-color:#bdf375}.eyebrow{color:#bdf375;font:700 .72rem/1.4 Courier New,monospace;letter-spacing:.16em;text-transform:uppercase}h1,h2,h3,p{margin-top:0}h1,h2,h3{letter-spacing:-.045em}h1{font-size:clamp(3.4rem,9vw,7.5rem);line-height:.95}h1 em{color:#bdf375;font-style:normal}h2{font-size:clamp(2rem,5vw,3.5rem);line-height:1.05}h3{font-size:clamp(1.35rem,3vw,1.85rem)}p{line-height:1.58}.button{display:inline-flex;justify-content:center;align-items:center;gap:.8rem;min-height:48px;padding:.78rem 1.15rem;border:1px solid #bdf375;border-radius:.25rem;font-weight:800;text-decoration:none;transition:background .18s,color .18s,transform .18s}.button:hover:not(:disabled){transform:translateY(-2px)}.button:disabled{cursor:not-allowed;opacity:.5}.button-primary{background:#bdf375;color:#0b1b15}.button-secondary{background:#153129;color:#e8f8cf}.button-ghost{background:transparent;color:#d9edcb;border-color:#55756a}.action-row{display:flex;flex-wrap:wrap;gap:.75rem;align-items:center}.section-heading{max-width:47rem;margin-bottom:1.8rem}.section-heading h2{margin:.5rem 0 .7rem}.section-heading p{color:#bdcdc3;margin-bottom:0}.quiet,.panel-note{color:#a9c0b0;font-size:.88rem}.notice{color:#f7d699;border-left:3px solid #f7d699;padding:.6rem .9rem;background:#253326}.site-footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:.5rem;margin-top:5rem;padding:1.4rem 0 2rem;border-top:1px solid #31534a;color:#a9c0b0;font:.75rem Courier New,monospace;letter-spacing:.08em;text-transform:uppercase}.hub-hero{display:grid;grid-template-columns:1.1fr .9fr;min-height:540px;gap:3rem;align-items:center;padding:4rem 0 5rem}.hero-copy h1,.blocks-hero h1{margin:.8rem 0 1.6rem}.hero-copy p,.blocks-hero p{max-width:34rem;color:#d0ddd1;font-size:clamp(1rem,1.7vw,1.18rem)}.hero-copy .button{margin-top:1rem}.hero-art{min-height:410px;display:grid;place-items:center;position:relative;overflow:hidden;border:1px solid #365d4e;background:radial-gradient(circle,#214b39,#0d211b 70%)}.hero-art:before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(0deg,transparent 0 4px,#bdf37508 5px 6px)}.hero-art>span{position:absolute;bottom:1rem;right:1rem;font:.7rem Courier New,monospace;color:#afd2ad}.hero-grid{width:216px;height:216px;position:relative;background-size:36px 36px;background-image:linear-gradient(#9cbe9d25 1px,transparent 1px),linear-gradient(90deg,#9cbe9d25 1px,transparent 1px);transform:rotate(-10deg)}.hero-block{position:absolute;width:36px;height:36px;background:#bdf375;border:3px solid #27412e;box-shadow:inset 3px 3px #ebffbf,7px 7px 18px #0008}.b1{left:72px;top:36px}.b2{left:36px;top:72px}.b3{left:72px;top:72px}.b4{left:108px;top:72px}.b5{left:108px;top:108px;background:#f9c570}.b6{left:144px;top:108px;background:#f9c570}.b7{left:144px;top:144px;background:#f9c570}.library,.guide,.play-section{padding:4rem 0 1rem;border-top:1px solid #31534a}.game-library{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.game-card{min-height:300px;padding:clamp(1.25rem,3vw,2rem);display:flex;flex-direction:column;align-items:flex-start;gap:.75rem;background:#142c23;border:1px solid #527663;border-radius:.35rem;text-decoration:none;transition:transform .18s,border-color .18s}a.game-card:hover{transform:translateY(-4px);border-color:#bdf375}.game-card strong{margin-top:auto;font-size:clamp(1.7rem,3vw,2.5rem);letter-spacing:-.04em}.game-card>span:not(.game-card__label){color:#bfd0c2;line-height:1.45}.game-card .game-card__cta{color:#bdf375!important;font-weight:800}.game-card--coming{background:#0d201b;border-style:dashed}.game-card--coming strong{color:#d8e4d7}.mini-piece{display:grid;grid-template-columns:repeat(3,18px);grid-template-rows:repeat(2,18px);gap:2px;margin:1.4rem 0}.mini-piece i{background:#bdf375}.mini-piece i:first-child{grid-column:2}.mini-piece--outline i{background:transparent;border:1px solid #617d6b}.idea-section{margin-top:5rem;padding:clamp(1.5rem,5vw,3rem);background:#19382b;border-left:4px solid #bdf375}.idea-section h2{max-width:45rem;margin:.8rem 0}.idea-section p{max-width:49rem;color:#d6e4d6}.text-link{color:#bdf375;font-weight:800}.blocks-hero{display:flex;justify-content:space-between;align-items:center;gap:2rem;padding:4rem 0}.blocks-hero h1{font-size:clamp(3.4rem,9vw,6.8rem)}.hero-stat{min-width:190px;aspect-ratio:1;border:1px solid #587668;display:grid;place-content:center;text-align:center;background:radial-gradient(circle,#1e4635,#10231d)}.hero-stat span{color:#bdf375;font:700 clamp(2rem,4vw,3rem) "Courier New",monospace}.hero-stat small{font:.65rem Courier New,monospace;letter-spacing:.09em}.mode-grid,.guide-grid{display:grid;gap:1rem}.mode-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.guide-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mode-grid:has(.mode-card--featured){grid-template-columns:repeat(3,minmax(0,1fr))}.mode-card,.panel,.state-card,.result-card{padding:clamp(1.2rem,3vw,1.8rem);background:#12271f;border:1px solid #436551;border-radius:.3rem}.mode-card{display:flex;flex-direction:column;align-items:flex-start;min-height:250px}.mode-card h3{margin:1.2rem 0 .4rem}.mode-card p{color:#c9d9cb}.mode-card .button{margin-top:auto}.mode-card--featured{grid-column:1 / -1;border-color:#bdf375;min-height:0}.ranking-panel{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-top:1rem}.shared-result{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin:0 0 1rem;border-color:#bdf375}.shared-result h3{margin:.4rem 0}.shared-result p{margin:0;color:#c9d9cb}.ranking-panel h3{margin:.7rem 0 .4rem}.ranking-list{list-style:none;padding:0;margin:.4rem 0 1rem;width:100%;font:.85rem Courier New,monospace}.ranking-list li{display:grid;grid-template-columns:2rem minmax(0,1fr) auto;align-items:center;gap:.5rem;padding:.5rem 0;border-bottom:1px solid #365347}.ranking-list li span:nth-child(2){overflow-wrap:anywhere}.rank-number{color:#bdf375}.state-card,.result-card{max-width:760px;margin:0 auto 3rem}.state-card h2,.result-card h2{margin:.7rem 0}.result-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:.5rem;margin:1.5rem 0}.result-stats div{padding:1rem .6rem;background:#0b1c16;display:grid;gap:.3rem}.result-stats span{color:#adc6b0;font-size:.77rem}.result-stats strong{color:#bdf375;font:700 clamp(1.2rem,3vw,1.8rem) "Courier New",monospace}.result-card .action-row{margin:1rem 0}.nickname{margin:1.5rem 0}.nickname label{display:block;margin-bottom:.65rem;font-weight:700}.nickname input{min-height:48px;min-width:12rem;padding:.65rem;background:#06140f;color:#eef4e9;border:1px solid #779a77;border-radius:.25rem}.game{display:grid;justify-items:center;gap:.8rem;padding:1rem 0 3rem}.game-heading{text-align:center}.game-heading h2{margin:.35rem 0;font-size:clamp(1.4rem,3vw,2rem)}.game-heading p{color:#b9cbba;margin:0;font-size:.9rem}.metrics{width:min(100%,480px);display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.4rem}.metrics div{display:grid;gap:.15rem;text-align:center;padding:.45rem .2rem;background:#173528;border:1px solid #3a624b}.metrics span{color:#b8cdb5;font-size:.68rem}.metrics strong{font:700 clamp(.95rem,2vw,1.3rem) "Courier New",monospace;color:#e4ffad}.board-frame{position:relative;padding:5px;border:2px solid #acd56f;background:#06150f;box-shadow:0 0 0 5px #1c3529,0 18px 45px #0008}.board{--cell: clamp(13px, min(8.8vw, calc((100svh - 380px)/20) ), 29px);display:grid;grid-template-columns:repeat(10,var(--cell));grid-template-rows:repeat(20,var(--cell));width:max-content;height:max-content;background:#10251e}.board-cell{width:var(--cell);height:var(--cell);border:1px solid #26443a;background:#10251e}.board-cell[class*=board-cell--]{border:2px solid #153c2c;box-shadow:inset 3px 3px #ffffff75,inset -3px -3px #0005}.board-cell--I{background:#63d9d1}.board-cell--J{background:#638ee8}.board-cell--L{background:#f4a865}.board-cell--O{background:#efdf6d}.board-cell--S{background:#93d86d}.board-cell--T{background:#bf91df}.board-cell--Z{background:#ec7d80}.board-overlay{position:absolute;inset:5px;display:grid;place-content:center;gap:.2rem;text-align:center;background:#071811de}.board-overlay strong{color:#e4ffad;font-size:2rem}.board-overlay span{color:#d5e3d1;font-size:.85rem}.touch-controls{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:.5rem;width:min(100%,480px);touch-action:manipulation}.touch-controls button{min-height:48px;padding:.35rem;border:1px solid #719879;border-radius:.3rem;color:#e7f9d7;background:#1d3929;font-size:1.2rem;font-weight:800;touch-action:none}.touch-controls button:hover,.touch-controls button:focus-visible{background:#bdf375;color:#0b1b15}.touch-controls button:nth-child(6){font-size:.85rem}.touch-controls .pause-button{grid-column:span 2;font-size:.9rem}.game-hint{color:#a8bdac;font:.73rem/1.5 Courier New,monospace;text-align:center;margin:0}.game-help{width:min(100%,480px);color:#b9cebb;font-size:.82rem}.game-help summary{cursor:pointer;text-align:center}.game-help p{margin:.6rem 0 0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:pre}.guide-grid .panel h3{margin-bottom:1rem}.key-list,.formula-legend{margin:0}.key-list div{display:grid;grid-template-columns:6rem 1fr;gap:.5rem;padding:.55rem 0;border-top:1px solid #345442}.key-list dt{color:#bdf375;font:700 .85rem Courier New,monospace}.key-list dd,.formula-legend dd{margin:0;color:#cad8ca}.steps{margin:0;padding-left:1.4rem}.steps li{margin-bottom:.6rem;line-height:1.5}.steps li::marker{color:#bdf375;font-weight:800}.math-panel{display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(1rem,4vw,3rem);margin-top:1rem;padding:clamp(1.3rem,4vw,2.3rem);border:1px solid #6b9667;background:linear-gradient(120deg,#173b29,#10231e)}.math-panel h3{margin:.6rem 0 1rem;font-size:clamp(1.8rem,4vw,2.8rem)}.math-panel p{color:#d2e2d2}.formula{padding:1rem;overflow-wrap:anywhere;background:#081d16;border-left:3px solid #bdf375;color:#e7ffbb!important;font:700 .9rem/1.6 Courier New,monospace}.formula-legend div{display:grid;grid-template-columns:9rem 1fr;gap:.8rem;padding:.3rem 0}.formula-legend dt{color:#bdf375;font-weight:800}.scoring{display:flex;justify-content:space-between;gap:1rem;align-items:center;margin-top:1rem}.scoring h3{margin-bottom:.3rem}.scoring p{margin-bottom:0;color:#c4d2c5}.score-pills{display:flex;flex-wrap:wrap;gap:.35rem}.score-pills span{display:grid;padding:.5rem .7rem;min-width:5rem;background:#0a1d15;color:#a7c3ad;font-size:.75rem}.score-pills strong{color:#eaffc6;font:700 1.2rem Courier New,monospace}@media(max-width:850px){.mode-grid,.mode-grid:has(.mode-card--featured){grid-template-columns:repeat(2,minmax(0,1fr))}.mode-card--featured{grid-column:1 / -1}.math-panel{grid-template-columns:1fr}}@media(min-width:621px){.board{--cell: clamp(17px, min(8.8vw, calc((100svh - 400px)/20) ), 29px)}}@media(max-width:620px){.site-shell{width:min(100% - 2rem,1140px)}.site-header{align-items:flex-start}.site-header nav{justify-content:flex-end;gap:.75rem}.site-header nav a{font-size:.78rem}.hub-hero{grid-template-columns:1fr;gap:1rem;padding:3rem 0}.hero-art{min-height:230px}.hero-grid{transform:rotate(-10deg) scale(.75)}.blocks-hero{padding:2.6rem 0}.hero-stat{display:none}.game-library,.mode-grid,.mode-grid:has(.mode-card--featured),.guide-grid,.ranking-panel{grid-template-columns:1fr}.mode-card--featured{grid-column:auto}.mode-card{min-height:210px}.library,.guide,.play-section{padding-top:3rem}.scoring{display:block}.score-pills{margin-top:1rem}.formula-legend div{grid-template-columns:1fr;gap:.1rem}.result-stats{grid-template-columns:repeat(2,1fr)}.shared-result{align-items:flex-start;flex-direction:column}.game-heading p,.game-hint{display:none}}@media(max-width:620px)and (max-height:700px){.is-playing .site-header{padding:.8rem 0}.is-playing .game{gap:.55rem;padding-top:.7rem}.is-playing .game-heading .eyebrow{display:none}.is-playing .game-heading h2{font-size:1.2rem}.is-playing .touch-controls button{min-height:44px}}@media(max-width:350px){.board{--cell: clamp(13px, min(8.8vw, calc((100svh - 300px)/20) ), 19px)}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button,.game-card{transition:none}}