:root{color-scheme:dark;--navy:#112336;--deep:#091725;--panel:#1b344b;--text:#eef5f6;--muted:#b3c6d1;--cyan:#77d9df;--gold:#f2c574;--line:#39536a;font-family:'Avenir Next','Segoe UI',system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--navy);color:var(--text);font-size:16px;line-height:1.65}a{color:inherit}button,select{font:inherit}button,select,.action{min-height:44px;border:1px solid var(--line);border-radius:8px;background:var(--panel);color:var(--text);padding:9px 16px;cursor:pointer}button:hover{border-color:var(--cyan)}a,button,summary,select{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid var(--gold);outline-offset:5px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip-link{position:absolute;left:16px;top:-100px;z-index:9;background:var(--gold);color:var(--deep);padding:12px}.skip-link:focus{top:10px}.play-header{display:flex;justify-content:space-between;align-items:center;gap:24px;max-width:1440px;margin:auto;padding:22px 5%;border-bottom:1px solid var(--line)}.brand{font-weight:900;letter-spacing:.07em;text-decoration:none;font-size:20px}.brand-pips{color:var(--cyan);letter-spacing:-.1em;margin-right:8px}.play-header nav{display:flex;gap:30px;font-size:14px}.play-header nav a{text-decoration:none;color:var(--muted)}main{max-width:1600px;margin:auto}h1,h2,h3,p{margin-top:0}h2,h3{line-height:1.18;letter-spacing:-.025em}.game-intro{display:grid;grid-template-columns:1.15fr 1fr;gap:clamp(32px,6vw,100px);align-items:center;padding:64px 7% 76px}.intro-copy h1{font-size:clamp(54px,6.8vw,102px);font-weight:750;line-height:.95;letter-spacing:-.055em;margin:24px 0}.intro-copy h1 span{color:var(--gold);font-weight:400}.intro-copy h2{font-size:clamp(20px,2vw,29px);max-width:23ch}.intro-copy>p{max-width:54ch;color:var(--muted)}.beta-pill{font-size:12px;display:inline-flex;align-items:center;gap:8px;color:var(--cyan)}.beta-pill:before{content:'';width:6px;height:6px;border-radius:50%;background:currentColor}.intro-actions{display:flex;align-items:center;gap:24px;flex-wrap:wrap;margin-top:28px}.action{text-decoration:none;font-weight:750}.primary{background:var(--gold);border-color:var(--gold);color:var(--deep);padding:13px 22px}.primary:hover{background:#ffe0a6}.text-link{font-size:14px;text-underline-offset:5px}.puzzle{border-radius:24px;background:#e5eff0;color:#17354a;padding:clamp(22px,3vw,40px);box-shadow:12px 14px 0 #254259;transform:rotate(1deg)}.puzzle>*{transform:rotate(-1deg)}.puzzle-top{display:flex;justify-content:space-between;gap:10px;align-items:center}.puzzle-top h2{font-size:18px;line-height:1.4;margin:0}.puzzle-top>span{font-size:20px;color:#527080;white-space:nowrap}.target{display:flex;align-items:baseline;justify-content:space-between;border-bottom:1px solid #b7c9cc;padding:16px 0 8px;margin-bottom:18px}.target span{font-size:14px}.target strong{font-size:82px;line-height:1.05;letter-spacing:-.045em;font-variant-numeric:tabular-nums}.puzzle>p{font-size:14px}.number-tiles{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:6px}.number-tiles button{background:white;color:#16334a;border:1px solid #acbdc4;border-bottom:4px solid #a6bcc7;border-radius:6px;font-size:23px;padding:7px 0;min-height:52px;font-weight:750}.number-tiles button[aria-pressed=true]{background:#183b53;color:white;border-color:#183b53}.number-tiles button:disabled{opacity:.3;cursor:default}.operators{display:flex;gap:8px;margin-top:12px}.operators button{flex:1;color:#17354a;background:transparent;border-color:#a6bdc6;font-size:23px;padding:0}.operators button[aria-pressed=true]{background:#17354a;color:white}#demo-status{display:block;min-height:55px;margin:15px 0;font-size:14px;font-weight:650}.solution{border-top:1px solid #b7c9cc;padding-top:12px}.solution summary{font-size:14px;cursor:pointer}.solution p{font-size:14px;margin:12px 0}.demo-note{font-size:11px!important;color:#506b79;margin:14px 0 0}.arena-section{background:var(--deep);padding:40px 24px}.arena-heading{max-width:1280px;display:flex;align-items:center;justify-content:space-between;gap:18px;margin:0 auto 24px}.arena-heading h2{font-size:clamp(23px,3vw,38px);margin:8px 0 0}.play-layout{display:flex;justify-content:center}.game-frame{position:relative;width:min(100%,calc((100svh - 190px)*16/9));aspect-ratio:16/9;flex-shrink:0;overflow:hidden;border:1px solid #536c82;border-radius:12px;background:#020617;box-shadow:0 16px 40px #0004}.game-frame iframe{display:block;width:100%;height:100%;border:0}.game-frame:fullscreen{width:100vw;height:100dvh;border:0;border-radius:0}.game-tools{display:flex;justify-content:space-between;align-items:center;gap:18px;max-width:1280px;margin:20px auto 0;font-size:13px}.game-tools a{text-underline-offset:4px}.load-help{max-width:76ch;margin:20px auto 0;text-align:center;color:var(--muted);font-size:13px}#page-status{text-align:center;color:var(--gold);margin:10px 0}.guide{padding:76px 7%;background:#edf2f3;color:#153045}.section-heading{max-width:820px;margin-bottom:46px}.section-kicker{color:#316778;font-size:14px;margin-bottom:14px}.section-heading h2{font-size:clamp(32px,4.4vw,62px);max-width:19ch;margin-bottom:24px}.sequence{font-size:14px;color:#526d79;line-height:2;max-width:60ch}.rule-row{display:grid;grid-template-columns:1fr 1.4fr;gap:7%;align-items:center;padding:40px 0;border-top:1px solid #becdd2}.rule-row h3,.scoring h3{font-size:clamp(23px,2.6vw,34px)}.rule-row p,.scoring p{max-width:67ch;color:#395867}.rule-visual{min-height:200px;position:relative;display:flex;align-items:center;justify-content:center;gap:6px;border-radius:16px;background:#dce7ea;padding:28px 16px 48px}.letters span{display:grid;place-items:center;width:47px;aspect-ratio:.85;background:#fff;border-bottom:4px solid #bacbd2;border-radius:6px;font-size:27px;font-weight:750}.rule-visual b{position:absolute;bottom:12px;right:20px;font-size:14px;color:#526d79}.calculation{flex-direction:column;gap:0;background:#203d53;color:#f3d391}.calculation span{font-size:30px}.calculation strong{font-size:68px;line-height:1.15;letter-spacing:-.04em}.calculation b{color:#c2d3dc}.score-example{font-weight:750;color:#173c50!important;font-size:14px}.scoring{display:flex;gap:32px;border-top:1px solid #becdd2;padding-top:40px;margin-top:8px}.score-symbol{font-size:80px;color:#346a7f;line-height:1}.scoring p{margin:0}.help-section{padding:76px 7%;display:grid;grid-template-columns:1fr 1.4fr;gap:7%}.help-section h2{font-size:clamp(30px,4vw,48px);max-width:14ch}.questions details{border-bottom:1px solid var(--line);padding:18px 0}.questions details:first-child{padding-top:0}.questions summary{cursor:pointer;font-size:18px;font-weight:650;padding-right:12px}.questions p{margin:16px 0 8px;color:var(--muted);font-size:15px}.questions a{color:var(--cyan)}.updated{padding:0 7% 36px;font-size:12px;color:var(--muted)}footer{background:var(--deep);display:flex;justify-content:space-between;align-items:flex-start;gap:30px;padding:32px 5%;font-size:12px;color:var(--muted)}footer nav{display:flex;gap:18px;flex-wrap:wrap;max-width:650px}footer a{text-decoration:none}footer a:hover{color:var(--cyan)}@media(min-width:1700px){.game-frame{max-width:1440px}}@media(max-width:760px){.play-header{padding:16px 20px;gap:12px}.play-header nav{display:none}.game-intro{grid-template-columns:1fr;padding:36px 22px 50px;gap:38px}.intro-copy h1{font-size:64px}.intro-copy h2{max-width:25ch}.puzzle{max-width:520px;width:100%;margin:auto;box-shadow:6px 8px 0 #254259;transform:none}.puzzle>*{transform:none}.target strong{font-size:66px}.arena-section{padding:30px 8px}.arena-heading{padding:0 10px}.arena-heading h2{font-size:23px}.arena-heading button{font-size:12px;padding:8px;white-space:nowrap}.game-frame{width:min(100%,calc((100svh - 168px)*9/16));aspect-ratio:9/16}.game-tools{padding:0 12px;align-items:flex-start}.game-tools a{max-width:54%}.game-tools button{font-size:12px}.load-help{padding:0 14px;text-align:left}.guide{padding:48px 22px}.rule-row{grid-template-columns:1fr;gap:28px;padding:30px 0}.rule-visual{min-height:160px}.scoring{gap:18px}.score-symbol{font-size:55px}.help-section{padding:48px 22px;grid-template-columns:1fr;gap:24px}.help-section h2{max-width:none}.updated{padding:0 22px 24px}footer{flex-wrap:wrap;padding:28px 22px}footer nav{width:100%;order:3}.intro-actions{gap:16px}.number-tiles button{font-size:20px}.puzzle-top>span{font-size:16px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
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