:root{color-scheme:dark;--bg:#050707;--panel:#0c1111;--line:#23312d;--green:#33e06f;--orange:#ff9d2e;--cyan:#30d9e8;--purple:#b55cff;--red:#ff4055;--text:#e8f1eb;--muted:#a0b2a9;--accent:var(--green);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button,select{font:inherit}button{cursor:pointer;touch-action:manipulation;color:inherit;border:1px solid var(--line);background:#111a16;border-radius:9px;min-height:44px;transition:background .15s,border-color .15s,transform .15s}button:hover:not(:disabled){border-color:var(--accent);background:#17251d}button:active:not(:disabled){transform:translateY(1px)}button:disabled{opacity:.45;cursor:default}button:focus-visible,select:focus-visible,a:focus-visible,canvas:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}a{color:inherit}[hidden]{display:none!important}.shell{max-width:1192px;margin:auto;padding:0 32px}.masthead{display:flex;align-items:center;justify-content:space-between;min-height:91px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:11px;text-decoration:none;font-size:11px;letter-spacing:2px}.brand b{display:block;font-size:10px;letter-spacing:4.4px;color:var(--muted);margin-top:5px}.brand-icon{display:grid;place-items:center;border:1px solid var(--green);border-radius:8px;width:36px;height:36px;color:var(--green);font-size:35px;line-height:1}.edition{font:9px ui-monospace,monospace;letter-spacing:1.2px;color:var(--muted)}.edition i,.hud-mode i{display:inline-block;width:5px;height:5px;background:var(--green);border-radius:50%;margin-right:9px;box-shadow:0 0 10px #33e06f66}.intro{display:flex;align-items:flex-end;justify-content:space-between;padding:37px 0 27px}.eyebrow{font:10px ui-monospace,monospace;letter-spacing:2px;color:var(--green);margin:0 0 12px}h1{margin:0;font-weight:900;font-style:italic;font-size:clamp(40px,5.5vw,68px);line-height:1;letter-spacing:-3px}h1 span{color:var(--green);margin-left:6px}h1 sup{font-style:normal;font-size:30px;vertical-align:top;margin-left:9px;color:var(--green)}.intro-note{color:var(--muted);font-size:13px;line-height:1.7;margin:0 0 3px}.modes{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:23px}.mode{display:flex;gap:13px;text-align:left;align-items:center;padding:16px;min-height:77px;background:#0b100e;border-color:#202b25;font-weight:650;font-size:15px;border-radius:10px}.mode-number{align-self:flex-start;margin-top:3px;font:10px ui-monospace,monospace;color:var(--muted)}.mode small{display:block;font:8px ui-monospace,monospace;letter-spacing:1.6px;margin-top:7px;color:var(--muted)}.mode-symbol{margin-left:auto;font-size:27px;font-weight:400;color:var(--muted)}.mode.selected{background:#112318;border-color:var(--accent);box-shadow:inset 0 -3px var(--accent)}.mode.selected .mode-symbol,.mode.selected .mode-number{color:var(--accent)}.game-layout{display:grid;grid-template-columns:minmax(0,1fr) 324px;align-items:start;gap:22px}.arena{border:1px solid #2e4436;border-radius:15px;background:#080e0a;overflow:hidden;box-shadow:0 0 60px #33e06f06}.hud{height:67px;display:flex;align-items:center;gap:24px;padding:0 24px;background:#0c140f;border-bottom:1px solid var(--line)}.hud-mode{margin-right:auto;font:11px ui-monospace,monospace;letter-spacing:1.7px}.hud-score,.hud-best{display:flex;flex-direction:column;gap:3px;min-width:40px}.hud-score>span,.hud-best>span{font:8px ui-monospace,monospace;color:var(--muted);letter-spacing:1.5px}.hud strong{font:22px ui-monospace,monospace;font-weight:600}.hud-best strong{color:var(--muted);font-size:18px}.icon-button{width:44px;background:transparent;font-size:20px}.board-wrap{position:relative;margin:15px;background:#000;border:1px solid #1a3022;border-radius:5px;overflow:hidden}canvas{width:100%;height:auto;aspect-ratio:1;display:block;touch-action:none}.overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;text-align:center;background:radial-gradient(ellipse at center,#020a04f5 15%,#020904e6 45%,#02090499 90%);padding:18px}.overlay-content{max-width:390px;width:100%}.overlay .eyebrow{font-size:9px;letter-spacing:2px;margin-bottom:21px;color:var(--accent)}.overlay h2{font-size:clamp(30px,3.8vw,49px);font-weight:800;letter-spacing:-1.7px;line-height:1.07;margin:0 0 19px}.overlay p:not(.eyebrow){font-size:13px;color:#a9beb0;line-height:1.75;margin:0 0 26px}.overlay #overlay-footnote{font:8px ui-monospace,monospace;letter-spacing:2px;color:var(--muted);margin:21px 0 0}#overlay-actions{max-width:230px;margin:auto;display:grid;gap:8px}.primary{background:var(--green);border-color:var(--green);color:#001b09;font-weight:750;min-height:52px;padding:0 23px;box-shadow:0 0 28px #33e06f18}.primary span{margin-left:24px;font-size:20px}.primary:hover:not(:disabled){background:#73f59d;color:#001b09}.secondary{background:#17261b}.text-button{border:0;background:transparent;color:var(--muted);font-size:11px;min-height:44px;padding:7px}.round-banner{position:absolute;left:10%;right:10%;top:38%;text-align:center;background:#0c1517f5;border:1px solid var(--accent);padding:23px 10px;border-radius:12px;white-space:pre-line;font-size:19px;line-height:1.7}.arena-footer{padding:1px 18px 16px;display:flex;align-items:center;justify-content:space-between;color:var(--muted);font:8px ui-monospace,monospace;letter-spacing:1px;gap:8px}.arena-footer>span:first-child{display:flex;align-items:center;gap:6px}.arena-footer i{display:inline-block;width:6px;height:6px;border-radius:2px}.legend-snake{background:var(--green)}.legend-fruit{background:var(--red);margin-left:9px}.arena-footer b{margin:0 6px;color:#475c4e}.controls-panel{background:var(--panel);border:1px solid var(--line);border-radius:15px;padding:22px}.panel-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:21px}.panel-heading h2{margin:0;font-size:16px;font-weight:600;letter-spacing:-.3px}.tag{color:var(--green);font:8px ui-monospace,monospace;letter-spacing:1.3px;border:1px solid #284632;border-radius:4px;padding:4px 6px}.active-control{padding-left:11px;border-left:2px solid var(--green)}.small-label{display:block;color:var(--muted);font:8px ui-monospace,monospace;letter-spacing:1.7px;margin-bottom:7px}.active-control strong{font-size:13px;font-weight:500}.tilt-display{display:flex;align-items:center;gap:22px;justify-content:center;padding:23px 0 18px}.tilt-orbit{width:96px;height:96px;border-radius:50%;position:relative;border:1px solid #324137;background:radial-gradient(circle,#19302088,transparent 68%)}.tilt-orbit:before{content:"";position:absolute;inset:17px;border:1px dashed #26382c;border-radius:50%}.axis{position:absolute;background:#23362a}.axis.horizontal{height:1px;width:100%;top:50%}.axis.vertical{width:1px;height:100%;left:50%}.tilt-dot{position:absolute;width:9px;height:9px;border-radius:50%;background:var(--green);left:calc(50% - 4.5px);top:calc(50% - 4.5px);box-shadow:0 0 12px #33e06f90}.orbit-label{position:absolute;font-size:9px;color:var(--muted)}.orbit-label.top{top:-13px;left:44px}.orbit-label.bottom{bottom:-13px;left:44px}.orbit-label.left{left:-13px;top:42px}.orbit-label.right{right:-13px;top:42px}.tilt-values{font:9px ui-monospace,monospace;display:grid;gap:12px;color:var(--muted)}.tilt-values b{font-weight:400;color:#b7d2bf;margin-left:7px}.sensor-button{width:100%;margin-top:7px;background:#16271c;color:var(--green);border-color:#2e4c38;font-size:12px;font-weight:600;min-height:46px}.sensor-status{font-size:10px;line-height:1.6;color:var(--muted);min-height:48px;margin:10px 0 8px}.setting-row{display:flex;justify-content:space-between;align-items:center;min-height:44px;font-size:11px;color:#becdc4;gap:8px}.setting-row select{background:#111c16;border:1px solid #324839;color:var(--text);border-radius:6px;padding:8px;min-height:44px;font-size:11px}.tools-row{display:flex;justify-content:space-between}.tools-row .text-button{padding-left:0}.manual-controls{border-top:1px solid var(--line);padding-top:17px;margin-top:9px}.manual-heading{display:flex;align-items:center;justify-content:space-between}.manual-heading h3{font-size:12px;font-weight:500;margin:0}.manual-heading>span{color:var(--green)}.manual-body{display:flex;gap:13px;align-items:center;margin-top:12px}.dpad{display:grid;grid-template-columns:repeat(3,44px);grid-template-rows:repeat(3,44px);gap:3px;flex-shrink:0}.dpad button{font-size:18px;padding:0;border-radius:6px;background:#131f18}.dpad .up{grid-area:1/2}.dpad .left{grid-area:2/1}.dpad .right{grid-area:2/3}.dpad .down{grid-area:3/2}.pad-center{grid-area:2/2;display:grid;place-items:center;color:#496450}.manual-body p{font-size:9px;line-height:1.75;color:var(--muted);margin:0}.manual-body b{color:#cad8cf;font-weight:500}#calibration{font-size:11px;color:var(--cyan);padding:6px 0}progress{display:block;width:100%;height:9px;accent-color:var(--green);margin-top:10px}.field-guide{display:grid;grid-template-columns:1fr 1.5fr 1.3fr;gap:30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:24px 0;margin-top:27px;align-items:center}.field-guide .eyebrow{color:var(--muted);font-size:8px}.field-guide h2{font-size:17px;margin:9px 0 0;font-weight:600;letter-spacing:-.4px}.field-guide p{margin:0;font-size:11px;line-height:1.7;color:var(--muted)}.field-guide .reverse-warning{border-left:1px solid #31452c;padding-left:20px}.reverse-warning>span{font-size:21px;color:var(--orange);margin-right:6px}.reverse-warning strong{color:var(--text);font-weight:500}.storage-note{font-size:10px;text-align:center;color:var(--muted);margin:21px 0}footer{display:flex;justify-content:space-between;gap:14px;padding:16px 0 28px;font:8px ui-monospace,monospace;letter-spacing:1.3px;color:#8a9d91}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-100px;left:10px;z-index:10;padding:14px;background:var(--green);color:#000}.skip-link:focus{top:10px}.noscript{padding:30px;text-align:center;background:#211;color:#fff}
@media(min-width:1150px){.board-wrap{margin:19px}.hud{height:72px}.overlay h2{font-size:51px}.controls-panel{padding:24px}.sensor-status{font-size:11px}.manual-body p{font-size:10px}}
@media(max-width:950px){.shell{padding:0 22px}.game-layout{grid-template-columns:minmax(0,1fr) 286px;gap:16px}.controls-panel{padding:17px}.mode{padding:13px;gap:8px}.mode-symbol{display:none}.manual-body{flex-direction:column;align-items:flex-start}.manual-body p{font-size:11px}.overlay h2{font-size:35px}.overlay p:not(.eyebrow){font-size:12px;margin-bottom:18px}.hud{gap:13px;padding:0 15px}.arena-footer{font-size:7px;padding-left:12px;padding-right:12px}.field-guide{gap:20px}}
@media(max-width:740px){.shell{padding:0 16px}.masthead{min-height:72px}.edition{font-size:8px;letter-spacing:.5px}.intro{padding:28px 0 24px}.intro-note{display:none}h1{font-size:54px}.modes{gap:7px;margin-bottom:16px}.mode{padding:12px 8px;gap:7px;font-size:13px;min-height:64px}.mode small{font-size:6px;letter-spacing:.6px}.mode-number{font-size:8px}.game-layout{grid-template-columns:1fr;gap:17px}.board-wrap{margin:12px}.hud{height:60px;gap:22px}.hud-mode{font-size:10px}.controls-panel{padding:20px;display:grid;grid-template-columns:1fr 1fr;column-gap:22px}.panel-heading{grid-column:1/-1;margin-bottom:17px}.active-control{grid-column:1/-1}.tilt-display{grid-column:1;grid-row:3/6;padding:24px 0;gap:22px;flex-direction:column}.tilt-values{display:flex;gap:13px}.sensor-button{grid-column:2;grid-row:3;margin-top:17px;padding:8px;font-size:11px}.sensor-status{grid-column:2;grid-row:4;min-height:0}.setting-row{grid-column:1/-1}.tools-row{grid-column:1/-1}.manual-controls{grid-column:1/-1}.manual-body{flex-direction:row;gap:30px;align-items:center}.manual-body p{font-size:11px;line-height:1.9}#calibration{grid-column:1/-1}.overlay h2{font-size:clamp(34px,7.3vw,51px)}.overlay p:not(.eyebrow){font-size:13px}.overlay .eyebrow{margin-bottom:17px}.arena-footer{font-size:8px;padding:0 14px 14px}.field-guide{grid-template-columns:1fr;gap:14px;margin-top:21px;padding:22px 0}.field-guide .reverse-warning{padding-left:13px}.field-guide p{font-size:12px}footer{font-size:7px;letter-spacing:.5px}footer>span:nth-child(2){display:none}}
@media(max-width:390px){.shell{padding:0 10px}.edition{max-width:120px;line-height:1.6;text-align:right}h1{font-size:47px}.mode{font-size:12px;justify-content:center;padding:10px 3px}.mode-number{display:none}.mode small{font-size:6px}.hud{gap:12px;padding:0 12px}.overlay h2{font-size:32px}.overlay .eyebrow{margin-bottom:13px}.overlay p:not(.eyebrow){font-size:11px;line-height:1.6;margin-bottom:15px}.overlay #overlay-footnote{font-size:7px;margin-top:13px}.primary{min-height:46px}.arena-footer{font-size:6.5px}.controls-panel{column-gap:16px;padding:16px}.manual-body{gap:17px}.manual-body p{font-size:10px}.intro .eyebrow{font-size:8px}}
.mobile-pad{display:none}
.overlay{overflow:auto}.overlay-content{margin:auto}
@media(min-width:741px){.board-wrap{width:min(calc(100% - 38px),max(320px,calc(100svh - 460px)));margin:16px auto}}
@media(max-width:740px){.mobile-pad{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin:0 12px 13px}.mobile-pad button{font-size:21px;background:#101e15}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{transition:none!important;animation:none!important;scroll-behavior:auto!important}}