:root{font-family:"Arial Rounded MT Bold","Hiragino Maru Gothic ProN","Yu Gothic",Meiryo,sans-serif;color:#172c49;background:#e8f4ff;font-synthesis:none;--blue:#087ffa;--ink:#172c49}*{box-sizing:border-box}body{margin:0;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #ffca37;outline-offset:3px}button:disabled{opacity:.3;cursor:default}[hidden]{display:none!important}.arcade{height:100vh;height:100dvh;min-height:320px;display:flex;flex-direction:column;align-items:center;overflow:hidden;background:radial-gradient(ellipse at 50% 25%,#d4efff,#eaf4fc 70%);padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom)}.game-nav{width:100%;height:60px;flex:none;display:flex;align-items:center;justify-content:space-between;gap:8px;background:#f9fcff;box-shadow:0 1px 0 #d3e0ed;z-index:5;padding:8px max(12px,env(safe-area-inset-right)) 8px max(12px,env(safe-area-inset-left))}.game-nav h1{margin:0;font-size:14px;font-weight:900;letter-spacing:-.4px}.nav-button{border:1px solid #ccd8e7;border-radius:12px;background:#fff;color:var(--ink);min-height:42px;padding:0 12px;display:flex;align-items:center;justify-content:center;gap:6px;text-decoration:none;font-size:12px;font-weight:800;white-space:nowrap;box-shadow:0 2px 0 #dae5f0}.back-link>span{font-size:23px;line-height:1}#fullscreen>span:last-child{font-size:20px}.nav-button:hover{background:#edf6ff}.play-area{flex:1;width:100%;min-height:0;display:flex;justify-content:center;align-items:center;overflow:hidden}.game-frame{height:100%;width:auto;max-width:100%;aspect-ratio:390/560;position:relative;overflow:hidden;isolation:isolate;touch-action:none;user-select:none;-webkit-user-select:none;background:#18b3fb;box-shadow:0 12px 60px #00458322}canvas{display:block;width:100%;height:100%;touch-action:none}.hud{position:absolute;top:3.5%;left:4.5%;right:4.5%;z-index:3;display:flex;gap:22px;align-items:flex-start;pointer-events:none;color:#fff;text-shadow:0 2px 0 #153f6e}.score-box span,.best-box>span{display:block;font:bold 12px Arial;letter-spacing:.7px}.score-box strong{display:block;font:900 38px Arial;line-height:1.05;-webkit-text-stroke:1.5px #1c4975;paint-order:stroke fill}.best-box{padding-top:2px}.best-box strong{font:900 23px Arial;display:block}.best-box>span{font-size:9px}.round-button{margin-left:auto;border:1px solid #ffffffa8;border-radius:13px;background:#ffffffdf;color:var(--ink);width:44px;height:44px;font:900 21px Arial;pointer-events:auto;box-shadow:0 3px 0 #164a7822}.overlay{position:absolute;inset:0;z-index:4;display:flex;align-items:center;justify-content:center;padding:18px;background:linear-gradient(transparent 25%,#0075b20c)}.overlay-card{width:88%;max-width:330px;text-align:center;margin-top:58px;border:1px solid #ffffffd9;border-radius:24px;padding:22px 22px 13px;background:linear-gradient(145deg,#ffffffed,#f3fbffe8);backdrop-filter:blur(10px);box-shadow:0 14px 34px #005a8d24,inset 0 2px 0 #fff}.overlay-eyebrow{display:block;color:#58738e;font-size:10px;font-weight:800;letter-spacing:.7px}.overlay h2{font-size:27px;font-weight:900;line-height:1.3;margin:10px 0;color:#15335d;letter-spacing:-.5px}.overlay h2>span{display:block;color:#ee537c;font-size:1.3em;letter-spacing:1px}.overlay p{font-size:11px;line-height:1.7;color:#546d88;margin:8px 0 16px}.primary-button{border:0;border-radius:14px;background:linear-gradient(#1797ff,#0875ef);color:white;display:flex;align-items:center;justify-content:center;gap:15px;padding:14px 18px;width:100%;font-weight:900;font-size:17px;box-shadow:0 4px 0 #005dc7,0 6px 15px #0980ec24;min-height:46px}.primary-button:active{transform:translateY(2px);box-shadow:0 2px 0 #005dc7}.help-button{margin:13px auto 0;background:none;border:0;color:#476782;font-weight:800;font-size:12px;min-height:40px;padding:6px 15px;display:flex;gap:7px;align-items:center}.help-button>span{border:1.5px solid currentColor;border-radius:50%;width:18px;height:18px;font:900 12px Arial;display:grid;place-items:center}.start-hint{display:block;font-size:9px;color:#71869c;margin-top:3px}.canvas-caption{position:absolute;bottom:11%;left:0;width:100%;text-align:center;color:#fff;text-shadow:0 2px 3px #134377;font-size:12px;font-weight:900;pointer-events:none}.game-toolbar{flex:none;width:min(100%,600px);height:48px;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 13px}.toolbar-button{border:0;background:transparent;color:#3d5875;min-height:44px;min-width:44px;font-size:12px;font-weight:800}#restart{font:34px Arial;line-height:1}.mobile-control{font-size:11px;font-weight:800;color:#56708a;margin:0;letter-spacing:.4px}.status{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.result{display:flex;justify-content:center;gap:36px;margin:12px 0 20px}.result span{display:block;font:bold 10px Arial;color:#65819e;letter-spacing:1px}.result strong{display:block;font:900 34px Arial;color:#137ae3}.game-expanded{overflow:hidden}.arcade.is-expanded{position:fixed;inset:0;z-index:1000}.arcade::backdrop{background:#e8f4ff}dialog{border:0;border-radius:23px;padding:30px 24px 24px;width:calc(100% - 32px);max-width:400px;max-height:calc(100dvh - 32px);overflow:auto;background:#f8fcff;color:var(--ink);box-shadow:0 24px 90px #042a5b50}dialog::backdrop{background:#08385870;backdrop-filter:blur(5px)}.dialog-close{position:absolute;top:6px;right:8px;min-width:44px;min-height:44px;background:none;border:0;font:27px Arial;color:#61778f}.dialog-eyebrow{color:#4086b9;font:bold 9px Arial;letter-spacing:2px}dialog h2{font-size:21px;margin:12px 0 18px}.help-controls{display:grid;grid-template-columns:1fr 1fr;gap:10px}.help-controls>div{border-radius:14px;background:#e4f3ff;padding:12px 6px;text-align:center}.help-controls>div:last-child{background:#ffedf3}.help-controls b,.help-controls strong,.help-controls span{display:block}.help-controls b{font-size:30px;color:#1387ea;line-height:1.2}.help-controls>div:last-child b{color:#e9658c}.help-controls strong{font-size:12px;margin:5px 0}.help-controls span{font-size:10px;color:#6b8198}dialog ol{padding-left:20px;font-size:12px;line-height:1.8}dialog li{margin:8px 0}dialog p{font-size:10px;color:#67809a;line-height:1.9;margin:17px 0 22px}
@media(min-aspect-ratio:390/670){.game-frame{width:auto;height:100%}}
@media(max-aspect-ratio:390/670){.game-frame{width:100%;height:auto;max-height:100%}.play-area{background:#a2ddfa}}
@media(min-width:700px){.game-nav{padding-left:max(24px,calc((100vw - 1000px)/2));padding-right:max(24px,calc((100vw - 1000px)/2))}.game-nav h1{font-size:18px}.game-frame{outline:1px solid #ffffff80}}
@media(max-width:355px){.game-nav h1{font-size:11px}.nav-button{font-size:11px;padding:0 9px}.game-nav{gap:5px}.overlay-card{padding:17px 18px 10px;margin-top:48px}.overlay h2{font-size:24px}.overlay p{font-size:10px;margin-bottom:12px}.overlay-eyebrow{font-size:9px}.help-button{margin-top:8px}.hud{gap:16px}}
@media(orientation:landscape) and (max-height:600px){.arcade{display:grid;grid-template-columns:1fr auto 1fr;grid-template-rows:1fr auto 1fr;gap:0 18px;padding:10px 20px}.play-area{grid-column:2;grid-row:1/4;height:100%;width:auto}.game-frame{height:100%;width:auto}.game-nav{grid-column:1;grid-row:2;height:auto;display:flex;flex-direction:column;background:none;box-shadow:none;gap:18px;padding:0}.game-nav h1{order:-1;font-size:14px;text-align:center}.nav-button{min-height:44px}.game-toolbar{grid-column:3;grid-row:2;height:auto;flex-direction:column;width:100%;padding:0;gap:15px}.mobile-control{text-align:center;line-height:1.8}.overlay-card{margin-top:38px;padding:12px 14px 8px;border-radius:18px}.overlay h2{font-size:19px;margin:5px 0}.overlay h2>span{font-size:1.15em}.overlay p{font-size:9px;margin:5px 0 9px}.overlay-eyebrow{font-size:8px}.primary-button{font-size:13px;padding:8px 12px;min-height:40px}.help-button{font-size:10px;min-height:35px;margin-top:5px}.start-hint{font-size:7px;margin:0}.result{margin:8px 0 12px;gap:25px}.result strong{font-size:23px}.score-box strong{font-size:25px}.score-box span{font-size:9px}.best-box strong{font-size:17px}.best-box>span{font-size:7px}.hud{gap:12px}.round-button{width:36px;height:36px;min-width:36px;font-size:18px}.canvas-caption{font-size:9px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
/* Fit the portrait play area without stretching the canvas. */
@media(orientation:portrait){.play-area{container-type:size;background:#a2ddfa}.game-frame{width:min(100cqw,calc(100cqh * 390 / 560));height:auto;max-width:none;aspect-ratio:390/560}.overlay-card{margin-top:58px;max-width:300px}}
@media(orientation:portrait) and (max-height:650px){.overlay-card{margin-top:90px;padding:15px 18px 9px}.overlay h2{font-size:23px;margin:6px 0}.overlay p{font-size:10px;margin-bottom:11px}.help-button{margin-top:7px;min-height:36px}.primary-button{padding:11px 15px;font-size:15px}.canvas-caption{font-size:10px}}
@media(orientation:portrait){.arcade.is-expanded .game-nav{height:50px;background:#f9fcff}.arcade.is-expanded .game-toolbar{position:absolute;bottom:env(safe-area-inset-bottom);z-index:6;height:42px;width:100%;max-width:560px;background:linear-gradient(transparent,#e9f5ffed)}.arcade.is-expanded .mobile-control{visibility:hidden}.arcade.is-expanded #fullscreen-label{font-size:10px}.arcade.is-expanded .game-nav h1{font-size:11px}}

/* Match the portal page background; keep light game panels readable. */
html,body,.arcade,.arcade::backdrop{background:#000f3f}.game-nav,.arcade.is-expanded .game-nav{background:#000f3f}.game-nav h1,.game-toolbar .toolbar-button,.game-toolbar .mobile-control{color:#fff}.arcade.is-expanded .game-toolbar{background:linear-gradient(transparent,#000f3fed)}

/* Keep menu and pause targets usable at compact viewport sizes. */
.nav-button,.help-button{min-inline-size:44px;min-block-size:44px}
.round-button{inline-size:44px;block-size:44px;min-inline-size:44px;min-block-size:44px}