@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Space+Grotesk:wght@400;500;600;700&display=swap');
:root{color-scheme:dark;--bg:#141821;--panel:#1d222d;--muted:#949dad;--ink:#edf0f4;--lime:#b8ee83;--line:#303641;--board-width:min(320px,calc((100dvh - 190px)/2))}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:'DM Sans',-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo',sans-serif;font-size:16px}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit;border:0}button:disabled{opacity:.35;cursor:default}button:focus-visible,a:focus-visible{outline:2px solid var(--lime);outline-offset:5px}button{touch-action:manipulation}button:active:not(:disabled){transform:translateY(1px)}[hidden]{display:none!important}.shell{max-width:1080px;margin:auto;padding:0 44px}.topbar{height:96px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;gap:12px;align-items:center;color:var(--ink);text-decoration:none;font-family:'Space Grotesk',sans-serif;font-size:24px;font-weight:700;letter-spacing:-1px}.brand-mark{position:relative;width:28px;height:26px;transform:rotate(-9deg);display:block}.brand-mark i{position:absolute;width:8px;height:8px;background:var(--lime);border-radius:1px}.brand-mark i:nth-child(1){top:3px;left:10px}.brand-mark i:nth-child(2){top:13px;left:0}.brand-mark i:nth-child(3){top:13px;left:10px}.brand-mark i:nth-child(4){top:13px;left:20px}.brand-divider{color:#586170;font-weight:400;padding:0 12px}.brand-sub{font-size:14px;letter-spacing:3px;font-weight:500}.top-actions{display:flex;gap:10px}.icon-button{border:1px solid var(--line);border-radius:50%;width:38px;height:38px;background:transparent;display:grid;place-items:center}.icon-button svg{width:18px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.arena{padding:34px 0 20px;display:grid;grid-template-columns:1fr var(--board-width) 156px;column-gap:38px;align-items:start}.intro{padding-top:32px}.eyebrow{font-family:'Space Grotesk',sans-serif;font-size:11px;line-height:1.7;letter-spacing:1.5px;color:var(--muted)}h1{font-size:43px;line-height:1.32;letter-spacing:-2.5px;margin:24px 0 18px;font-weight:700}h1 span{color:var(--lime)}.intro-copy{font-size:14px;color:var(--muted);line-height:1.9;margin:0}.guide{max-width:208px;margin-top:35px;border-top:1px solid var(--line);padding-top:17px}.guide-title{font-family:'Space Grotesk',sans-serif;font-size:11px;letter-spacing:1.5px;display:flex;justify-content:space-between;color:var(--muted);margin-bottom:22px}.guide-title span{color:var(--lime);font-size:18px}.guide-row{display:flex;gap:15px;margin:20px 0;align-items:center;font-size:14px}.guide-symbol{border:1px solid #3d4550;width:35px;height:35px;display:grid;place-items:center;border-radius:10px;font-size:23px;color:var(--lime)}.guide-row small{display:block;font-size:12px;color:var(--muted);margin-top:3px}.desktop-note{font-size:12px;color:var(--muted);line-height:2;margin:26px 0 0}kbd{font-family:inherit;font-size:11px;color:#c5cbd4}.board-top,.board-bottom{display:flex;justify-content:space-between;align-items:center;font-family:'Space Grotesk',sans-serif;font-size:10px;letter-spacing:1.7px;color:var(--muted);height:28px}.board-top{padding:0 2px 10px}.board-dots{letter-spacing:3px;font-size:11px;color:var(--lime)}.board-wrap{position:relative;border:1px solid #424b55;border-radius:7px;background:#10151c;overflow:hidden;box-shadow:0 16px 60px #06090e38}.board-wrap>canvas{width:100%;height:auto;aspect-ratio:1/2;display:block}.board-bottom{padding:8px 2px 0;font-size:9px;letter-spacing:1.4px}.corner-mark{font-size:18px;color:var(--lime)}.overlay{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:22px;background:#111720d9;text-align:center;backdrop-filter:blur(4px)}.overlay-symbol{position:relative;width:58px;height:55px;transform:rotate(-12deg);margin-bottom:23px}.overlay-symbol span{position:absolute;width:17px;height:17px;background:var(--lime);border-radius:3px;box-shadow:inset 0 2px 0 #ffffff30}.overlay-symbol span:nth-child(1){top:0;left:19px}.overlay-symbol span:nth-child(2){top:19px;left:0}.overlay-symbol span:nth-child(3){top:19px;left:19px}.overlay-symbol span:nth-child(4){top:19px;left:38px}.overlay .eyebrow{font-size:10px;color:var(--lime)}h2{font-size:30px;line-height:1.4;letter-spacing:-1.4px;font-weight:700;margin:13px 0}.overlay p{font-size:13px;line-height:1.8;color:#a9b3c0;margin:4px 0 25px}.primary-button{display:flex;align-items:center;justify-content:space-between;gap:15px;width:100%;max-width:250px;background:var(--lime);color:#172315;border-radius:5px;padding:16px 18px;font-weight:700;font-size:14px}.primary-button span{font-size:20px}.text-button{background:transparent;color:#c6cdd7;font-size:12px;padding:15px 5px 10px}.overlay .permission-note{font-size:10px;color:#7e8998;margin:8px 0 0}.sidebar{padding-top:28px}.label{font-family:'Space Grotesk',sans-serif;font-size:11px;color:var(--muted);letter-spacing:1.8px}.score-card{padding:19px 17px;background:var(--panel);border-radius:7px;border:1px solid var(--line)}.score-card strong{display:block;font-family:'Space Grotesk',sans-serif;font-size:30px;font-weight:500;letter-spacing:-1px;margin-top:9px;color:var(--lime);font-variant-numeric:tabular-nums}.best-label{display:block;font-size:10px;color:var(--muted);letter-spacing:1px;border-top:1px solid #353c45;margin-top:15px;padding-top:12px}.best-label b{color:#cbd2dc;font-weight:400;float:right}.mini-stats{display:flex;gap:25px;padding:25px 9px}.mini-stats strong{display:block;font-family:'Space Grotesk',sans-serif;font-size:25px;font-weight:400;margin-top:7px}.next-card{padding:17px 17px 7px;border:1px solid var(--line);border-radius:7px}.next-card canvas{display:block;width:100%;height:auto;max-height:180px;object-fit:contain}.tilt-card{margin-top:25px;padding:0 6px}.tilt-heading{display:flex;justify-content:space-between;align-items:center}.tilt-heading>span:last-child{font-family:'Space Grotesk',sans-serif;font-size:9px;letter-spacing:1px;color:var(--muted)}.tilt-heading>span:last-child.active{color:var(--lime)}.tilt-meter{position:relative;height:25px;margin:12px 0 5px}.tilt-meter:before{content:'';position:absolute;height:2px;background:#353e4b;top:12px;left:0;right:0}.tilt-meter i{height:10px;width:1px;background:#697484;position:absolute;top:8px;left:50%}.tilt-meter span{position:absolute;width:9px;height:9px;border-radius:50%;background:var(--lime);top:9px;left:50%;margin-left:-4px;z-index:1;transition:left .1s linear;box-shadow:0 0 14px #b8ee8340}#tilt-action{font-size:11px;color:#a3adbc;display:block;text-align:center;height:22px}#calibrate{display:block;width:100%;background:transparent;border:1px solid #3b444f;border-radius:5px;font-size:12px;padding:8px 2px;margin-top:10px}.control-tray{grid-column:2/4;padding:18px 0 0}.control-caption{display:flex;gap:12px;align-items:center;justify-content:space-between}#mode-label{font-family:'Space Grotesk',sans-serif;font-size:10px;letter-spacing:1.5px;color:var(--lime)}#help-open,#mode-switch{font-size:11px;color:var(--muted);background:transparent;padding:4px 0}#help-open span{border:1px solid #667181;border-radius:50%;padding:0 4px;font-size:9px;margin-left:3px}.tilt-legend{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:12px;margin-top:10px;font-size:16px;color:var(--lime)}.tilt-legend b{font-size:12px;font-weight:400;color:var(--muted);margin-left:4px}.touch-controls{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:10px}.touch-controls button{height:44px;background:#242c38;border:1px solid #414b59;border-radius:6px;font-size:23px;touch-action:none;user-select:none}.touch-controls button:nth-child(2){background:#b8ee8320;color:var(--lime);border-color:#b8ee8340}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:20px 0 24px;font-family:'Space Grotesk',sans-serif;font-size:9px;letter-spacing:1.6px;color:#727e8e}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#e9efdf;color:#172315;box-shadow:0 8px 40px #0008;padding:13px 18px;border-radius:8px;font-size:13px;line-height:1.6;max-width:calc(100vw - 32px);width:max-content;z-index:10;opacity:0;pointer-events:none;transition:opacity .2s}#toast.visible{opacity:1}.clear-flash{position:absolute;inset:0;background:#b8ee8330;opacity:0;pointer-events:none}.clear-flash.flash{animation:flash .35s ease-out}@keyframes flash{from{opacity:1}to{opacity:0}}dialog{border:1px solid #46505f;border-radius:16px;background:#1b222d;color:var(--ink);width:min(480px,calc(100vw - 28px));max-height:85dvh;padding:32px}dialog::backdrop{background:#060a11b3;backdrop-filter:blur(6px)}dialog h2{font-size:23px}dialog p{font-size:14px;line-height:1.8;color:#b7c1d0}dialog ul{list-style:none;padding:0}dialog li{margin:22px 0}dialog li b{color:var(--lime);font-size:15px}dialog li span{display:block;font-size:14px;line-height:1.7;margin-top:5px;color:#b7c1d0}.close-button{position:absolute;right:16px;top:10px;background:transparent;font-size:30px;color:#aeb9c9}.help-keyboard{border-top:1px solid var(--line);padding-top:18px}body:has(dialog[open]){overflow:hidden}
@media(min-width:761px) and (max-height:820px){:root{--board-width:min(300px,calc((100dvh - 200px)/2))}.topbar{height:72px}.arena{padding-top:23px;column-gap:30px}.intro{padding-top:16px}h1{font-size:37px;margin:15px 0}.guide{margin-top:22px}.guide-row{margin:14px 0}.desktop-note{margin-top:15px}.next-card canvas{max-height:140px}.mini-stats{padding:18px 9px}.tilt-card{margin-top:18px}.overlay-symbol{margin-bottom:12px}.overlay h2{font-size:26px}.overlay p{margin-bottom:16px}.overlay{padding:18px}}
@media(max-width:760px){:root{--board-width:min(calc((100dvh - 232px)/2),calc(100vw - 132px),300px)}.shell{padding:0 20px;max-width:490px}.topbar{height:68px}.brand{font-size:23px}.brand-sub{font-size:11px}.brand-divider{padding:0 9px}.icon-button{width:34px;height:34px}.top-actions{gap:8px}.intro{display:none}.arena{grid-template-columns:var(--board-width) minmax(68px,1fr);column-gap:16px;padding:16px 0 16px;justify-content:center}.play-column{grid-column:1}.board-top{font-size:8px;letter-spacing:1.4px;height:24px}.board-bottom{font-size:8px;letter-spacing:.8px;height:23px}.sidebar{grid-column:2;padding-top:24px}.score-card{padding:13px 10px}.label{font-size:9px;letter-spacing:1.2px}.score-card strong{font-size:22px;letter-spacing:-.8px;margin-top:8px}.best-label{font-size:8px;letter-spacing:.5px;margin-top:10px;padding-top:10px}.best-label b{float:none;display:block;margin-top:5px;font-size:11px}.mini-stats{display:block;padding:15px 10px}.mini-stats>div+div{margin-top:13px}.mini-stats strong{font-size:21px;margin-top:3px}.next-card{padding:11px 9px 0}.next-card canvas{max-height:135px}.tilt-card{padding:0 3px;margin-top:16px}.tilt-heading>span:last-child{font-size:8px}#tilt-action{font-size:10px;height:16px}#calibrate{font-size:10px;margin-top:8px;padding:7px 0}.tilt-meter{margin:6px 0 3px;height:20px}.control-tray{grid-column:1/3;padding-top:11px}.tilt-legend b{font-size:11px}.overlay{padding:14px}.overlay-symbol{transform:rotate(-12deg) scale(.83);margin-bottom:8px}.overlay h2{font-size:25px;line-height:1.45;margin:10px 0}.overlay p{font-size:11px;margin-bottom:18px}.primary-button{font-size:12px;padding:12px 13px}.text-button{font-size:10px;padding-top:14px}.overlay .permission-note{font-size:9px}.overlay .eyebrow{font-size:9px}.control-caption{gap:8px}footer{font-size:8px;letter-spacing:1px;padding:13px 0 15px}.touch-controls{gap:6px}.touch-controls button{height:42px}dialog{padding:26px}}
@media(max-width:380px),(max-height:700px) and (max-width:760px){:root{--board-width:min(calc((100dvh - 215px)/2),calc(100vw - 115px),280px)}.shell{padding:0 14px}.arena{column-gap:13px;padding-top:12px}.topbar{height:58px}.score-card strong{font-size:19px}.overlay-symbol{display:none}.overlay h2{font-size:22px}.overlay p{font-size:10px;margin-bottom:12px}.overlay .permission-note{font-size:8px}.next-card canvas{max-height:88px}.mini-stats{display:flex;gap:13px;padding:12px 5px}.mini-stats>div+div{margin:0}.mini-stats strong{font-size:18px}.tilt-card{margin-top:12px}.primary-button{padding:10px;font-size:11px}.board-bottom{font-size:7px}footer{font-size:7px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}
/* Keep game instructions readable on compact screens. */
.overlay p{font-size:14px}.text-button{font-size:13px}.overlay .permission-note{font-size:12px}.guide-row small,.desktop-note{font-size:13px}#help-open,#mode-switch,#calibrate,#tilt-action{font-size:12px}.tilt-legend b{font-size:13px}
@media(max-width:760px){:root{--board-width:min(calc((100dvh - 232px)/2),calc(100vw - 144px),300px)}.arena{grid-template-columns:var(--board-width) 88px}.control-tray{min-width:0}.overlay p{font-size:13px}.primary-button{font-size:14px}.text-button{font-size:12px}.overlay .permission-note{font-size:11px}.overlay h2{font-size:27px}.tilt-legend b{font-size:12px}#mode-label{font-size:9px;letter-spacing:.7px}.label{font-size:10px}.best-label{font-size:10px}.tilt-heading>span:last-child{font-size:10px}}
@media(max-width:380px),(max-height:700px) and (max-width:760px){:root{--board-width:min(calc((100dvh - 215px)/2),calc(100vw - 129px),280px)}.overlay p{font-size:12px}.primary-button{font-size:13px}.overlay h2{font-size:24px}.overlay .permission-note{font-size:10px}.overlay{padding:12px}}
@media(max-width:760px) and (orientation:landscape){:root{--board-width:200px}.arena{grid-template-columns:200px 110px}.overlay-symbol{display:none}.overlay h2{font-size:25px}}

.sound-button{width:auto;display:inline-flex;gap:6px;padding:0 11px;border-radius:22px}.sound-button span{font-size:12px}.sound-button svg{width:16px;height:16px}.sound-button[aria-pressed="true"]{color:var(--lime);border-color:#b8ee8355;background:#b8ee8310}