:root{--ink:#182237;--muted:#5b6375;--purple:#6143d9;--lime:#d5f56a;--paper:#f6f7fb;--line:#e3e5ee;--radius:22px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:3px solid #6645dd;outline-offset:4px}button:disabled{cursor:default}p{line-height:1.75}button{color:inherit}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(2.4rem,5.3vw,4.8rem);line-height:1.06;letter-spacing:-.055em}h2{font-size:2rem;letter-spacing:-.04em;line-height:1.2}h3{font-size:1.25rem;line-height:1.3;letter-spacing:-.02em}.wrap{width:min(1180px,calc(100% - 56px));margin:auto}.skip{position:absolute;top:-80px;background:var(--ink);color:#fff;padding:12px;z-index:20}.skip:focus{top:4px}.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{min-height:90px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-size:1.35rem;letter-spacing:-.055em;font-weight:800}.brand-mark{width:38px;height:38px;background:var(--ink);color:var(--lime);display:grid;place-items:center;border-radius:12px;font-size:1.02rem;letter-spacing:-.04em}.nav{display:flex;gap:28px;align-items:center;font-size:.94rem;font-weight:600}.nav a:hover,.footer-links a:hover{color:var(--purple)}.nav a[aria-current=page]{color:var(--purple)}.nav .nav-play{background:var(--ink);color:white;padding:12px 20px;border-radius:999px}.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center;padding:58px 0 48px}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.76rem;font-weight:750;color:var(--purple);margin-bottom:20px}.hero h1{margin-bottom:20px;max-width:600px}.hero h1 span{color:var(--purple)}.hero p{max-width:440px;font-size:1.06rem;color:var(--muted);margin-bottom:25px}.actions{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:14px 23px;background:var(--purple);border:1px solid transparent;border-radius:12px;color:#fff;font-weight:650;font-size:.95rem;min-height:48px}.btn:hover{background:#5134c5}.btn.secondary{background:white;color:var(--ink);border-color:var(--line)}.btn.secondary:hover{background:#f0edf9}.hero-note{font-size:.81rem;color:var(--muted);margin-top:20px}.feature{position:relative;border-radius:28px;background:#e9e4fc;padding:26px 30px;display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:20px;min-height:340px;overflow:hidden}.feature .eyebrow{font-size:.7rem;margin-bottom:16px}.feature h2{font-size:2.2rem;line-height:1.08;margin-bottom:12px}.feature p{font-size:.91rem;line-height:1.6;margin:0 0 22px}.feature .btn{background:var(--ink);padding:12px 16px;font-size:.87rem}.feature .mini-board{transform:rotate(8deg);box-shadow:0 15px 35px #45348220;max-width:245px;width:100%;padding:12px;background:#bcb0e7;border:1px solid #b5a7df;gap:7px}.feature .mini-cell{font-size:1.5rem;border-radius:8px}.section{padding:32px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}.section-head h2{margin:0}.section-head p{margin:8px 0 0;color:var(--muted)}.text-link{font-size:.9rem;font-weight:650;color:var(--purple);white-space:nowrap}.category-label{display:inline-block;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;font-weight:700;color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.game-card{display:block;border:1px solid var(--line);background:white;border-radius:var(--radius);overflow:hidden;transition:transform .2s,box-shadow .2s}.game-card:hover{transform:translateY(-4px);box-shadow:0 10px 25px #29345310}.card-art{height:186px;display:flex;align-items:center;justify-content:center;padding:20px;position:relative}.purple{--tint:#e9e3fc;--tile:#fff;--accent:#7459cf;background:var(--tint)}.pink{--tint:#fae5ee;--tile:#fff;--accent:#bd4378;background:var(--tint)}.yellow{--tint:#fbefc3;--tile:#fff8d9;--accent:#a76c07;background:var(--tint)}.blue{--tint:#dcecff;--tile:#f5f9ff;--accent:#3979c7;background:var(--tint)}.green{--tint:#e2f0d5;--tile:#f7fbf3;--accent:#4a772a;background:var(--tint)}.orange{--tint:#fbe4d3;--tile:#fff6ef;--accent:#b85b1d;background:var(--tint)}.mini-board{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;width:150px;aspect-ratio:1;background:#ffffff55;padding:8px;border-radius:13px;pointer-events:none}.mini-board.line,.mini-board.sum{grid-template-columns:repeat(3,1fr)}.mini-cell{background:var(--tile,#fff);color:var(--accent,#604baa);border-radius:5px;display:grid;place-items:center;font-size:1.07rem;font-weight:750;aspect-ratio:1}.mini-cell.empty{background:#00000009;color:transparent}.mini-cell.on{background:#efc84e;color:#73500e}.mini-cell.merge-big{background:#518dd2;color:#fff}.mini-cell.memory-back{background:#d880a4;color:#fff}.card-tag{position:absolute;left:16px;top:14px;background:#ffffffbb;font-size:.7rem;font-weight:700;padding:5px 8px;border-radius:6px}.card-body{padding:21px 23px}.card-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:9px}.card-body h3{margin:0}.card-body p{color:var(--muted);font-size:.9rem;line-height:1.65;margin:0 0 19px}.card-bottom{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #f0f0f5;padding-top:14px;font-size:.78rem;color:var(--muted)}.play-arrow{font-weight:700;color:var(--purple);font-size:.87rem}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.guide-card{display:block;background:white;border:1px solid var(--line);padding:26px;border-radius:18px}.guide-card:hover{border-color:#b7a9e8}.guide-number{font-size:2rem;letter-spacing:-.06em;color:#b9acd9;margin-bottom:18px;display:block;font-weight:750}.guide-card h3{margin:10px 0 14px}.guide-card p{color:var(--muted);font-size:.92rem;margin:0 0 15px}.guide-meta{font-size:.76rem;color:var(--muted)}.note-band{display:grid;grid-template-columns:1fr 1fr;gap:60px;margin:40px 0 58px;background:var(--ink);color:white;border-radius:24px;padding:38px 44px}.note-band h2{margin:0;font-size:1.9rem}.note-band p{margin:0;color:#cfd3df;font-size:.96rem}.note-band .eyebrow{color:var(--lime);margin-bottom:12px}.footer{border-top:1px solid var(--line);background:white;padding:38px 0 24px}.footer-top{display:flex;justify-content:space-between;gap:32px}.footer-top p{font-size:.85rem;color:var(--muted);margin:14px 0 25px;max-width:310px}.footer-links{display:flex;gap:40px;font-size:.86rem}.footer-links div{display:flex;flex-direction:column;gap:13px}.footer-links strong{margin-bottom:5px}.footer-bottom{border-top:1px solid var(--line);padding-top:22px;font-size:.77rem;color:var(--muted);display:flex;justify-content:space-between;gap:20px}.breadcrumb{display:flex;gap:10px;flex-wrap:wrap;font-size:.81rem;color:var(--muted);padding:25px 0}.breadcrumb a:hover{color:var(--purple)}.page-intro{padding:12px 0 24px}.page-intro h1{font-size:clamp(2.4rem,5vw,3.5rem);margin-bottom:14px}.page-intro p{max-width:660px;color:var(--muted)}.game-layout{display:grid;grid-template-columns:1.45fr .85fr;gap:28px;align-items:start;margin:10px 0 50px}.game-shell{background:white;border:1px solid var(--line);border-radius:24px;padding:26px;text-align:center;min-height:560px}.game-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:22px;text-align:left}.stat-label{display:block;text-transform:uppercase;font-size:.7rem;letter-spacing:.07em;color:var(--muted)}.stat-value{font-weight:750;font-size:1.5rem}.game-toolbar .btn{padding:10px 16px;font-size:.86rem;min-height:43px}.board{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;padding:12px;width:min(100%,370px);margin:0 auto;background:#e8e3f6;border-radius:16px;touch-action:pan-y}.board.lights{grid-template-columns:repeat(5,1fr);background:#ecebdc}.board.line,.board.sum{grid-template-columns:repeat(3,1fr)}.board.merge{touch-action:none;background:#dbe6f2}.board.memory{background:#f7e2eb}.cell{border:0;aspect-ratio:1;border-radius:9px;display:grid;place-items:center;font-size:clamp(1.15rem,3vw,1.8rem);font-weight:700;background:white;color:#4f377e;transition:background .12s,transform .12s;min-width:0;padding:0}.cell:hover:not(:disabled){background:#d8cff7;transform:translateY(-1px)}.cell.blank{background:#d5cde7}.cell.card-down{background:#b74678;color:#fff}.cell.card-down:hover:not(:disabled){background:#9f3463}.cell.matched{background:#f7f4f6;color:#ae3264}.cell.light-on{background:#f4ce52;color:#624800}.cell.light-off{background:#434956;color:#fff}.cell.light-off:hover:not(:disabled){background:#555d70}.cell.x-mark{color:#5a419e}.cell.o-mark{color:#b05d12}.cell.selected{background:var(--purple);color:#fff}.cell[data-value="0"]{background:#c4d5e6;color:transparent}.cell[data-value="4"]{background:#e7effb}.cell[data-value="8"]{background:#a1c4eb}.cell[data-value="16"]{background:#76a6dc;color:#0b2444}.cell[data-value="32"],.cell[data-value="64"]{background:#3675b6;color:#fff}.cell.big-number{background:#6546c2;color:white;font-size:1.3rem}.game-status{min-height:52px;margin:18px 0 6px;line-height:1.6;font-size:.94rem}.game-status.win{color:#326918;font-weight:700}.game-help{font-size:.78rem;color:var(--muted);margin:12px 0 0;line-height:1.6}.direction-controls{display:flex;justify-content:center;gap:8px;margin-top:18px}.direction-controls button{background:#f1edf9;border:1px solid #dfd6ef;border-radius:8px;width:45px;height:43px;font-size:1.3rem}.sum-target{font-size:1rem;margin:0 0 18px}.sum-target strong{font-size:1.8rem;color:var(--purple);margin:0 8px}.sum-controls{margin-top:18px}.side-panel{background:#eeeaf8;border:1px solid #e2dcf1;padding:28px;border-radius:20px}.side-panel h2{font-size:1.45rem}.side-panel p{font-size:.95rem;color:#4f526a}.side-panel ul{padding-left:20px;color:#4f526a;line-height:1.9;font-size:.88rem}.side-panel .eyebrow{font-size:.72rem}.side-panel .btn{width:100%;margin-top:10px}.prose-layout{display:grid;grid-template-columns:minmax(0,760px) 1fr;gap:64px;align-items:start;padding-bottom:50px}.prose{font-size:1.03rem;line-height:1.8;min-width:0}.prose h1{font-size:clamp(2.3rem,4.8vw,3.6rem);margin:12px 0 20px}.prose h2{font-size:1.7rem;margin:38px 0 16px}.prose h3{margin:26px 0 12px}.prose p{color:#414b60;line-height:1.85;margin-bottom:20px}.prose li{color:#414b60;padding-bottom:8px}.prose .lead{font-size:1.2rem;color:#576078;line-height:1.7}.prose .byline{font-size:.81rem;color:var(--muted);padding:0 0 22px;border-bottom:1px solid var(--line)}.prose pre{background:#eae6f5;border-radius:14px;padding:24px;font-size:1.08rem;line-height:1.7;overflow:auto;color:#493879;white-space:pre}.prose aside{background:#eae5f7;border-left:4px solid var(--purple);padding:20px 24px;border-radius:0 10px 10px 0;margin:28px 0;color:#443768}.prose table{width:100%;border-collapse:collapse;font-size:.94rem;margin:24px 0}.prose td,.prose th{text-align:left;border-bottom:1px solid var(--line);padding:12px}.reading-aside{position:sticky;top:28px;margin-top:24px}.reading-aside p{font-size:.91rem;color:var(--muted)}.reading-aside h3{font-size:1.13rem}.faq{margin-top:35px;border-top:1px solid var(--line)}.faq h3{font-size:1.08rem}.form{background:white;padding:28px;border:1px solid var(--line);border-radius:18px}.form label{display:block;font-size:.92rem;font-weight:650;margin-bottom:8px}.form input,.form textarea,.form select{width:100%;border:1px solid #bcc1ce;border-radius:8px;background:white;color:var(--ink);padding:12px;margin-bottom:21px;min-height:46px}.form textarea{resize:vertical;min-height:170px}.form .field-note{font-size:.81rem;color:var(--muted);margin:-12px 0 20px}.form-result{min-height:28px;margin-top:18px;font-size:.9rem}.trap{position:absolute;left:-10000px;opacity:0}.privacy-tools{margin:28px 0}.error-page{padding:100px 0;max-width:700px}.error-page h1{font-size:3.5rem}.filter-note{border-left:3px solid var(--purple);padding-left:16px;font-size:.91rem;color:var(--muted);max-width:670px}.save-pref{display:flex;align-items:center;justify-content:center;gap:8px;font-size:.8rem;color:var(--muted);margin:18px 0}.save-pref input{width:17px;height:17px;accent-color:var(--purple)}
@media(max-width:900px){.hero{gap:25px}.feature{padding:23px 22px;grid-template-columns:1fr 1fr;min-height:320px}.feature h2{font-size:1.8rem}.feature .mini-cell{font-size:1.1rem}.cards,.guide-grid{gap:16px}.card-body{padding:18px}.card-art{height:170px}.prose-layout{gap:32px;grid-template-columns:minmax(0,2.3fr) 1fr}.game-layout{grid-template-columns:1.25fr 1fr;gap:20px}.nav{gap:20px}.note-band{gap:30px;padding:30px}}
@media(max-width:700px){.wrap{width:calc(100% - 32px)}.header-inner{min-height:77px;gap:12px;flex-wrap:wrap;padding-top:16px;padding-bottom:16px}.brand{font-size:1.15rem}.brand-mark{width:32px;height:32px}.nav{gap:16px;font-size:.85rem}.nav .nav-play{display:none}.hero{grid-template-columns:1fr;padding:38px 0 22px;gap:28px}.hero h1{font-size:3.35rem}.hero p{font-size:1rem;margin-bottom:22px}.feature{min-height:275px;grid-template-columns:1fr 1fr;padding:24px;gap:15px}.feature .mini-board{width:min(100%,200px)}.feature .mini-cell{font-size:1.25rem}.hero-note{margin-top:17px}.section{padding:27px 0}.section-head{align-items:start}.section-head h2{font-size:1.7rem}.section-head p{font-size:.92rem}.cards{grid-template-columns:repeat(2,1fr);gap:14px}.card-art{height:150px;padding:15px}.mini-board{width:122px;gap:4px;padding:6px}.mini-cell{font-size:.85rem}.card-tag{display:none}.card-body{padding:16px}.card-body h3{font-size:1.02rem}.card-body p{font-size:.83rem;line-height:1.6;margin-bottom:15px}.card-top{align-items:start}.card-bottom{font-size:.7rem;gap:8px}.play-arrow{font-size:.75rem}.guide-grid{grid-template-columns:1fr}.guide-card{padding:23px}.guide-number{float:right;font-size:1.7rem}.note-band{grid-template-columns:1fr;gap:21px;padding:29px;margin:25px 0 40px}.footer-top{flex-direction:column;gap:0}.footer-links{gap:55px;margin-bottom:28px}.footer-bottom{flex-direction:column;gap:9px}.game-layout{grid-template-columns:1fr;margin-top:0;gap:24px}.game-shell{padding:20px 16px;min-height:520px}.side-panel{padding:24px}.board{gap:7px;padding:10px;max-width:340px}.cell{font-size:1.5rem}.board.lights .cell{font-size:1.3rem}.prose-layout{display:block}.prose{font-size:1rem}.reading-aside{position:static;padding-top:20px;border-top:1px solid var(--line)}.prose h2{font-size:1.5rem}.prose h1{font-size:2.6rem}.page-intro h1{font-size:2.6rem}.form{padding:22px}.prose pre{font-size:.94rem;padding:20px}.section-head .text-link{font-size:.81rem;margin-top:8px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.mini-board.lights{grid-template-columns:repeat(5,1fr)}