:root{color-scheme:dark;--bg:#080d0c;--ink:#e6eee9;--muted:#9caea4;--accent:#b7e5c5;--line:#c3e2ce26}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit;text-decoration:none}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:6px}header,main,footer{max-width:1440px;margin:auto;padding-left:6%;padding-right:6%}header{height:100px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}.brand{font-size:14px;font-weight:650;letter-spacing:.24em;display:flex;align-items:center;gap:12px}.brand-dot{width:9px;height:9px;border-radius:50%;background:var(--accent);box-shadow:0 0 18px #b7e5c55c}.source{font-size:12px;letter-spacing:.05em;color:var(--muted)}.source span{margin-left:12px}.hero{position:relative;min-height:740px;display:grid;grid-template-columns:1.15fr 1fr;gap:20px;align-items:center}.copy{position:relative;z-index:2;padding:70px 0}.eyebrow{font-size:10px;letter-spacing:.17em;color:var(--muted);font-weight:550;display:flex;align-items:center;gap:10px}.eyebrow>span{height:5px;width:5px;background:var(--accent);border-radius:50%}h1{font-weight:430;font-size:clamp(44px,5.3vw,78px);line-height:1.08;letter-spacing:-.055em;margin:35px 0 30px}h1 em{font-style:normal;color:var(--accent)}.intro{font-size:15px;line-height:1.8;color:var(--muted);max-width:440px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:34px}.button{display:inline-flex;align-items:center;justify-content:center;gap:28px;padding:15px 23px;min-height:54px;border:1px solid var(--line);border-radius:4px;font-size:13px;font-weight:600;transition:background .15s,transform .15s}.button:hover{transform:translateY(-2px)}.primary{background:var(--accent);color:#102117;border-color:var(--accent)}.primary:hover{background:#c9efd4}.secondary:hover{background:#b7e5c512}.play-note{font-size:10px;letter-spacing:.03em;color:var(--muted);margin-top:16px}.visual{position:relative;height:560px;margin-right:-5%;background:radial-gradient(ellipse at center,#739c7915,transparent 65%)}#space{width:100%;height:100%;display:block}.orbit-label{position:absolute;font:9px ui-monospace,monospace;color:#7c9487;letter-spacing:.15em}.orbit-label.top{top:20px;left:25%}.orbit-label.bottom{bottom:10px;right:15%}.axis{position:absolute;width:9px;height:9px}.axis:before,.axis:after{content:"";position:absolute;background:#708579}.axis:before{width:9px;height:1px;top:4px}.axis:after{width:1px;height:9px;left:4px}.axis.x{top:50%;left:0}.axis.y{top:50%;right:0}.about{border-top:1px solid var(--line);padding-top:24px}.section-label{font:9px ui-monospace,monospace;letter-spacing:.17em;color:var(--muted);display:flex;justify-content:space-between}.features{display:grid;grid-template-columns:repeat(3,1fr);gap:6%;padding:58px 0 66px}.number{font:10px ui-monospace,monospace;color:#789183;letter-spacing:.06em}article h2{font-size:18px;font-weight:500;letter-spacing:-.02em;margin:18px 0 12px}article p{color:var(--muted);font-size:13px;line-height:1.8;margin:0}.controls{border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:14%;padding:66px 0}.controls h2{font-weight:450;font-size:30px;letter-spacing:-.035em;margin:15px 0}.controls>div>p:not(.eyebrow){color:var(--muted);font-size:13px;max-width:360px}.control-list{padding-top:10px}.control-list>div{display:flex;justify-content:space-between;gap:15px;border-bottom:1px solid var(--line);padding:13px 0;font-size:11px}.control-list>div>span:last-child{color:var(--muted);text-align:right}kbd{font:10px ui-monospace,monospace;display:inline-block;border:1px solid #c3e2ce35;border-radius:3px;min-width:21px;text-align:center;padding:2px 4px;margin-right:2px}.muted{color:var(--muted)}.note{display:flex;gap:20px;align-items:center;border-top:1px solid var(--line);padding:24px 0 42px;max-width:760px}.note>span{font-size:24px;color:var(--accent)}.note p{color:var(--muted);font-size:11px;line-height:1.9}footer{border-top:1px solid var(--line);min-height:95px;display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:9px;letter-spacing:.08em}footer a{color:var(--ink)}footer a span{margin-left:10px}@media(min-width:1600px){.hero{min-height:820px}}@media(max-width:900px){header{height:80px}.hero{min-height:660px;grid-template-columns:1.2fr 1fr}.visual{height:440px;margin-right:-10%}.intro{font-size:14px}.button{padding:13px 17px}.controls{gap:8%}.features{gap:5%}article h2{font-size:17px}}@media(max-width:640px){header,main,footer{padding-left:7%;padding-right:7%}header{height:74px}.hero{display:flex;flex-direction:column;align-items:stretch;gap:0;min-height:0}.copy{padding:44px 0 0}.eyebrow{font-size:9px}h1{font-size:clamp(39px,10.5vw,61px);margin:25px 0 22px;line-height:1.1}.wide{display:none}.intro{font-size:13px;max-width:350px}.actions{margin-top:26px;gap:10px}.button{font-size:12px;padding:13px 17px;gap:20px}.play-note{font-size:9px}.visual{height:330px;margin:0 -5% 35px}.orbit-label.top{top:8px;left:14%}.orbit-label.bottom{right:12%;bottom:4px}.features{grid-template-columns:1fr;padding:22px 0 35px;gap:0}article{padding:25px 0;border-bottom:1px solid var(--line)}article:last-child{border:0}article h2{font-size:19px;margin:12px 0 8px}article p{max-width:370px}.controls{display:block;padding:35px 0}.control-list{margin-top:22px}.controls h2{font-size:28px}.note{padding:15px 0 25px}footer{flex-wrap:wrap;justify-content:space-between;padding-top:24px;padding-bottom:24px;gap:12px}footer span:last-child{width:100%;font-size:8px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}.button:hover{transform:none}}

/* Mobile presentation and Android download. Game simulation is unchanged. */
header .source{display:inline-flex;align-items:center;min-height:44px}
.start-help{display:flex;align-items:center;flex-wrap:wrap;gap:8px 24px;font-size:12px;margin:14px 0 0}.start-help a{display:inline-flex;align-items:center;gap:12px;min-height:44px;text-decoration:underline;text-underline-offset:5px}.start-help>span{color:var(--muted)}.play-note{font-size:12px;line-height:1.7;margin-top:4px}
.android{display:grid;grid-template-columns:1fr 1fr;gap:14%;padding:58px 0;border-top:1px solid var(--line);scroll-margin-top:24px}.android h2{font-size:clamp(28px,3vw,40px);line-height:1.2;font-weight:450;letter-spacing:-.035em;margin:18px 0}.android p{max-width:430px;font-size:14px;line-height:1.8;color:var(--muted)}.android .android-detail{font-size:12px}.android-download{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:18px;min-width:0}.build-badge{font:11px ui-monospace,monospace;letter-spacing:.08em;color:var(--accent)}.android-download .button{min-width:220px}.checksum{font-size:12px;min-height:44px;display:flex;align-items:center;text-decoration:underline;text-underline-offset:5px}.android-download p{font-size:12px;margin:0}
@media(max-width:900px){.hero{min-height:0}.copy{padding:48px 0}.visual{margin-right:0;height:380px}.actions{gap:10px}.button{gap:14px}.android{gap:8%}.control-list>div{font-size:12px}}
@media(max-width:640px){header,main,footer{padding-left:max(6%,env(safe-area-inset-left));padding-right:max(6%,env(safe-area-inset-right))}header{height:68px}.copy{padding:30px 0 0}.eyebrow{font-size:10px;letter-spacing:.12em}h1{font-size:clamp(38px,10.5vw,61px);margin:22px 0 20px}.intro{font-size:15px;line-height:1.7}.actions{display:grid;grid-template-columns:1fr;margin-top:22px}.actions .button{width:100%;min-height:52px;justify-content:space-between;padding:14px 18px;font-size:14px}.start-help{justify-content:space-between;font-size:12px;gap:4px 12px;margin-top:8px}.play-note{font-size:12px}.visual{height:250px;margin:14px 0 28px}.source{font-size:12px}.control-list>div{font-size:13px;padding:15px 0;gap:12px}.control-list>div>span{min-width:0}.controls>div>p:not(.eyebrow),article p{font-size:14px}.controls h2{font-size:30px}.android{display:block;padding:36px 0}.android-download{margin-top:24px;gap:12px}.android-download .button{width:100%;font-size:14px;justify-content:space-between;min-height:52px}.android .android-detail,.android-download p{font-size:13px}.note p{font-size:13px}.note>span{align-self:flex-start;margin-top:12px}footer{font-size:10px;padding-bottom:max(24px,env(safe-area-inset-bottom))}}
@media(max-height:520px) and (min-width:641px){.copy{padding:26px 0}h1{font-size:44px}.visual{height:300px}.hero{gap:28px}}

.header-actions{display:flex;gap:24px;align-items:center}.page-language{display:flex;gap:2px}.page-language button{font:500 12px system-ui;min-width:40px;min-height:44px;border:1px solid transparent;border-radius:4px;color:var(--muted);background:transparent;cursor:pointer}.page-language button[aria-pressed="true"]{color:var(--ink);border-color:var(--line)}.page-language button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.pc-download{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:40px 0;border-top:1px solid var(--line)}.pc-download h2{font-weight:450;font-size:28px}.pc-download p{font-size:14px;color:var(--muted);max-width:520px}.pc-download>.button{flex-shrink:0}.android .android-pending{font-size:12px;color:var(--accent)}@media(max-width:640px){.header-actions{gap:10px}.page-language button{min-width:36px}header .brand{letter-spacing:.16em}.pc-download{display:block}.pc-download .button{width:100%;font-size:14px;justify-content:space-between}.source span{margin-left:5px}.android .android-pending{font-size:13px}}