*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#090d17;color:#edf7ff;font-family:Arial,'Noto Sans',sans-serif}body{display:grid;place-items:center;background:radial-gradient(ellipse at 50% 15%,#172940 0,#090d17 65%)}main{width:min(100%,460px);padding:22px 20px 12px}header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}.wordmark{font-weight:800;letter-spacing:2px;font-size:18px;text-decoration:none;color:inherit}.wordmark span{color:#79caff;margin:0 4px}button{font:inherit;color:inherit;cursor:pointer;border:0;touch-action:manipulation}button:focus-visible{outline:2px solid #b2e8ff;outline-offset:4px}#sound{border:1px solid #344357;background:transparent;border-radius:22px;padding:9px 12px;font-size:17px}#sound span{font-size:10px;letter-spacing:1px;margin-left:5px}.topline{display:flex;justify-content:space-between;font-size:10px;letter-spacing:1.8px;color:#91a5bb;margin-bottom:10px}#percent{color:#b7dcff}.track{height:2px;background:#243246;margin-bottom:14px}#progress{height:100%;width:0;background:#93e2ff;transition:width .15s}.arena{position:relative;aspect-ratio:420/620;overflow:hidden;border:1px solid #29394c;border-radius:16px;background:#080f1c;box-shadow:0 20px 80px #0004}canvas{display:block;width:100%;height:100%;touch-action:none}#overlay{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;background:linear-gradient(#080f1c33,#080f1ced 46%,#080f1ce8);padding:24px}#overlay.hidden{display:none}.eyebrow{color:#80c8ee;font-size:9px;letter-spacing:2px}h1{font-weight:500;line-height:1.7;font-size:29px;letter-spacing:2px;margin:18px 0 8px}#description{font-size:12px;line-height:1.9;color:#9cb0c7;margin:0 0 28px}.primary{background:#c4edff;color:#112539;border-radius:100px;width:210px;padding:15px 24px;font-weight:700;display:flex;justify-content:space-between;box-shadow:0 0 35px #70cfff15}.textbtn{margin-top:18px;background:none;font-size:11px;color:#a9bbcf}.textbtn span{margin-left:12px}footer{height:56px;display:flex;align-items:center;justify-content:space-between}.lives{color:#ffb67e;font-size:10px;letter-spacing:4px}#hint{color:#6e849c;font-size:9px;letter-spacing:1.5px}.controls{display:flex;gap:6px}.controls button{background:#172335;border-radius:50%;width:34px;height:34px;font-size:19px}.controls button:disabled{opacity:.35}.bottom{text-align:center;font-size:8px;letter-spacing:2px;color:#52677f;margin:0}#toast{position:absolute;top:58%;left:0;right:0;text-align:center;font-size:12px;letter-spacing:4px;color:#cbf4ff;pointer-events:none;opacity:0;transition:opacity .3s}#toast.visible{opacity:1}@media(max-height:800px){main{max-width:400px;padding-top:12px}header{margin-bottom:15px}.arena{max-height:calc(100svh - 160px);width:auto;aspect-ratio:420/620;margin:auto}footer{height:48px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}

.courses{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;margin:-8px 0 16px}.courses button{padding:10px 2px;border:1px solid #29394c;background:#101b2b;color:#889db4;border-radius:8px;font-size:10px;letter-spacing:.4px}.courses button[aria-pressed="true"]{background:#bceaff;color:#0d2338;border-color:#bceaff}.legend{display:flex;justify-content:center;gap:18px;font-size:10px;margin:0 0 10px}.wide{color:#81efc2}.multi{color:#e4b5ff}.bottom{font-size:9px;letter-spacing:1px}#hint{font-size:9px;letter-spacing:.8px}.arena{max-height:none}@media(max-height:800px){main{max-width:380px}.arena{max-height:calc(100svh - 223px);width:100%}header{margin-bottom:16px}.courses{margin-bottom:10px}.legend{margin-bottom:7px;font-size:9px}.bottom{font-size:8px}}

.difficulty{display:flex;align-items:center;gap:10px;margin:-3px 0 13px;font-size:10px;color:#91a5bb}.difficulty select{color:#d9f1ff;background:#142236;border:1px solid #34485e;border-radius:6px;padding:6px 9px;font-size:11px}.difficulty select:disabled{opacity:.6}#difficulty-note{font-size:9px;margin-left:auto;color:#6c819a}@media(max-height:800px){.arena{max-height:calc(100svh - 260px)}.difficulty{margin-bottom:9px}}

.courses button[data-course='8']{grid-column:1/-1}#wall-legend{font-size:10px;text-align:center;color:#bdc2cb;margin:0 0 10px}

/* Touch protection is scoped to the playfield; controls and page zoom remain available. */
.arena,.arena canvas{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;touch-action:none;overscroll-behavior:contain}
html.play-active,body.play-active{overflow:hidden;overscroll-behavior:none}
.courses{display:flex;overflow-x:auto;scrollbar-width:thin;gap:5px;flex-shrink:0;touch-action:pan-x}
.courses button{flex:0 0 74px;white-space:nowrap}.courses button[data-course='8']{flex-basis:190px}
.arena{max-height:none!important;margin-left:auto;margin-right:auto;flex-shrink:0}

@media(max-height:650px){#overlay{padding:12px}#overlay .eyebrow,#description{display:none}h1{font-size:22px;line-height:1.4;margin:10px 0 18px}.primary{padding:11px 24px}.textbtn{margin-top:12px}}

.courses button{flex-basis:110px}.courses button[data-course='8']{flex-basis:125px}#description:empty,.bottom:empty,#difficulty-note:empty{display:none}#headline{font-size:28px;line-height:1.25}#overlay .eyebrow{letter-spacing:1.5px}

/* Release layout: safe areas and reachable touch controls on short viewports. */
main{padding-top:max(12px,env(safe-area-inset-top));padding-right:max(16px,env(safe-area-inset-right));padding-bottom:max(12px,env(safe-area-inset-bottom));padding-left:max(16px,env(safe-area-inset-left))}
.controls button{width:44px;height:44px}.courses button,#sound,.difficulty select{min-height:44px}.legend{flex-wrap:wrap;gap:6px 12px}.difficulty label{font-size:12px}#description{display:block;font-size:12px;margin:8px 0 18px}#game:focus-visible{outline:2px solid #b2e8ff;outline-offset:-3px}
@media(max-height:650px){main{padding-top:max(4px,env(safe-area-inset-top));padding-bottom:max(4px,env(safe-area-inset-bottom))}header{margin-bottom:8px}.courses{margin-bottom:8px}.topline{margin-bottom:5px}.track{margin-bottom:6px}.legend,#wall-legend{display:none}#overlay{padding:8px}#headline{font-size:22px;margin:6px 0}#description{font-size:10px;margin:4px 0 10px}.textbtn{min-height:36px;margin-top:6px}}
@media(max-height:500px){body.play-active .courses,body.play-active .difficulty,body.play-active .bb-editor-launch{display:none}header{margin-bottom:4px}footer{height:46px}#description{display:none}.bb-editor-launch{margin-bottom:4px!important}}

.next-stage{margin-top:12px;background:#80edc5}.next-stage[hidden],#demo[hidden]{display:none}
#overlay.won{background:radial-gradient(circle at 50% 35%,#225f5ec9,#071625ee 70%)}
#overlay.won::before{content:'✓';display:grid;place-items:center;width:58px;height:58px;border:1px solid #80edc5;border-radius:50%;color:#a4ffdb;font-size:30px;margin-bottom:14px;animation:clear-arrive .45s ease-out both}
#overlay.won #headline{font-size:24px;color:#c6ffe8;letter-spacing:3px}#overlay.won #description{display:block;color:#c7dbe9}#overlay.won #start{background:transparent;color:#d0e9f2;border:1px solid #618393;order:5;margin-top:12px}.won .next-stage{order:4}
@keyframes clear-arrive{from{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}
@media(prefers-reduced-motion:reduce){#overlay.won::before{animation:none}}
@media(max-height:650px){#overlay.won::before{width:34px;height:34px;font-size:22px;margin-bottom:5px}#overlay.won #headline{font-size:19px;margin:4px 0}#overlay.won #description{margin:3px 0 6px}#overlay.won .primary{padding:9px 18px;margin-top:6px}}

/* Top controls: compact settings, persistent actions, unchanged 420 x 620 playfield. */
header{margin-bottom:12px}.settings{display:flex;flex-wrap:wrap;align-items:end;gap:8px;margin-bottom:8px}.course-picker{display:flex;flex:1 1 160px;min-width:0;flex-direction:column;gap:4px;color:#91a5bb;font-size:12px}.course-picker select{width:100%;min-width:0}.settings select{min-height:44px;background:#142236;color:#d9f1ff;border:1px solid #34485e;border-radius:8px;padding:8px;font-size:12px}.settings .difficulty{display:flex!important;flex:1 1 110px;flex-wrap:wrap;gap:4px 8px;margin:0}.difficulty label{width:100%}.difficulty select{flex:1;min-width:0}#difficulty-note{flex-basis:100%;margin:0;font-size:9px}.action-bar{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:6px}.action-bar button{display:flex;align-items:center;justify-content:center;gap:8px;min-height:44px;min-width:44px;border-radius:10px;margin:0;padding:8px 10px;font-size:12px;background:#172335}.action-bar #start{flex:1 1 86px;width:auto;color:#112539;background:#c4edff}.action-bar #demo{flex:1 1 75px;color:#d9f1ff}.action-bar #pause,.action-bar #reset{font-size:20px}.action-bar #next{flex:1 1 130px;width:auto;background:#80edc5;color:#112539}.action-bar button[hidden]{display:none}.action-bar button:disabled{opacity:.35}.watch-help{font-size:10px;color:#91a5bb;margin:0 0 10px}.topline{gap:8px;letter-spacing:1px}.track{margin-bottom:0}footer{height:30px;gap:8px}#hint{text-align:right}.arena{margin-bottom:10px}html.play-active,body.play-active{overflow:auto;overscroll-behavior:none}#overlay{pointer-events:none}#overlay .primary{pointer-events:auto}
@media(max-width:350px){main{padding-left:max(10px,env(safe-area-inset-left));padding-right:max(10px,env(safe-area-inset-right))}.course-picker{flex-basis:140px}.settings .difficulty{flex-basis:90px}.action-bar{gap:4px}}
@media(max-height:500px){body.play-active .settings .difficulty{display:flex!important}.watch-help{margin-bottom:6px}header{margin-bottom:6px}}