*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:#080b24;color:#eef5ff;font-family:Inter,Arial,"Noto Sans JP",sans-serif}body{display:grid;place-items:center;padding:22px;background:radial-gradient(circle at 50% 0,#303d85 0,#111337 44%,#07091d 80%)}.shell{width:min(1280px,100%)}header,footer{display:flex;align-items:center;justify-content:space-between;gap:18px}header{padding:0 4px 15px}.brand{font-size:23px;font-weight:900;letter-spacing:.16em;text-shadow:0 0 18px #63bfff88}.brand span{color:#a5c9ff;font-size:14px}.header-note,footer{font-size:12px;letter-spacing:.12em;color:#aab8db}footer{padding:14px 4px}.game-wrap{position:relative;width:100%;aspect-ratio:16/9;border:2px solid #8b9cff;border-radius:14px;overflow:hidden;box-shadow:0 24px 70px #000b,0 0 65px #669eff42}canvas{display:block;width:100%;height:100%}.overlay{position:absolute;inset:0;display:grid;place-items:center;background:#080a2bb5;backdrop-filter:blur(8px)}.overlay.hidden{display:none}.panel{width:min(560px,90%);padding:38px 42px;background:linear-gradient(145deg,#2d3275ef,#111443f2);border:1px solid #adc1ffbb;border-radius:22px;box-shadow:0 20px 65px #0008,0 0 30px #818fff55;text-align:center}.eyebrow{color:#a9eaff;letter-spacing:.35em;font-weight:800;font-size:12px}.panel h1{font-size:clamp(27px,4vw,43px);margin:13px 0 9px;letter-spacing:.07em;text-shadow:0 0 18px #6ebdff88}.panel p{color:#d5dcf5;line-height:1.75;font-size:14px}.controls{display:flex;justify-content:center;gap:13px;margin:25px 0}.control{padding:9px 14px;border:1px solid #819deb;border-radius:8px;background:#1c245e}kbd{display:inline-block;min-width:24px;text-align:center;padding:3px 6px;margin:0 5px;border:1px solid #a6c9ff;border-bottom-width:3px;border-radius:5px;color:white;background:#354886}button{cursor:pointer;border:0;border-radius:100px;padding:14px 38px;font-size:15px;font-weight:900;letter-spacing:.16em;color:#101637;background:linear-gradient(90deg,#8ddcff,#ff9de4);box-shadow:0 8px 25px #83a8ff6b}button:hover{filter:brightness(1.12)}.result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:22px 0}.result-grid div{padding:12px 4px;border:1px solid #8c9de477;border-radius:10px;background:#101942}.result-grid b{display:block;font-size:22px;color:#fff}.result-grid span{font-size:10px;color:#b8c3ec;letter-spacing:.08em}.big-score{font-size:42px;font-weight:900;color:#a9f4fa;letter-spacing:.06em}@media(max-width:640px){body{padding:8px}.header-note,footer div:last-child{display:none}.brand{font-size:16px}.brand span{font-size:11px}footer{font-size:11px}.panel{padding:20px}.panel p{font-size:12px}.controls{margin:12px 0}.panel h1{font-size:25px}}
/* Game-native selection and two visibly different note families. */
.panel{width:min(680px,94%);padding:25px 32px;max-height:96%;overflow:auto}
.home-link{font-size:13px;color:#d1e5ff;text-decoration:none;border-bottom:1px solid #a6c5e566;padding-bottom:3px}
.panel h1{font-size:31px;letter-spacing:.035em}.panel h1 span{font-size:24px;color:#b9ddff}
.menu-description{margin:8px 0 18px}.difficulty-picker{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.difficulty{background:#10183d;color:#dbe7ff;border:2px solid #526188;border-radius:14px;padding:15px 17px;box-shadow:none;text-align:left;letter-spacing:0;min-height:125px}
.difficulty strong{display:block;font-size:25px;margin-bottom:6px}.difficulty span{display:block;font-size:13px;font-weight:400;line-height:1.6}.difficulty small{display:block;font-size:11px;color:#acbbdb;margin-top:9px;letter-spacing:.06em}
.difficulty.selected{border-color:#a9ecff;background:linear-gradient(135deg,#283e73,#20214f);box-shadow:0 0 20px #61c6ff33}
.difficulty[data-level="hard"].selected{border-color:#ffb7e8;background:linear-gradient(135deg,#573467,#20214f)}
.instruction-row{display:flex;align-items:center;justify-content:center;gap:28px;margin:13px 0 4px}
.instruction-row>div{display:flex;align-items:center;gap:8px;font-size:13px;color:#bdcdef}.instruction-row img{width:48px;height:45px;object-fit:contain}.instruction-row b{color:#fff;font-weight:700}
.hold-example{display:flex;align-items:center;width:88px;height:45px;background:linear-gradient(90deg,transparent 12%,#74dfff 15%,#74dfff 90%,transparent 94%);background-size:100% 15px;background-position:center;background-repeat:no-repeat}
.key-guide{margin:9px 0!important;font-size:13px!important}.timing-setting{margin:8px 0 13px;color:#c6d6f2;font-size:13px}.timing-setting summary{cursor:pointer}.timing-setting label{display:block;margin-top:8px}.timing-setting p{font-size:12px;margin:5px 0}
input{font:inherit;border:1px solid #6f96cc;background:#0b1637;color:#fff;width:80px;padding:5px 8px;border-radius:5px}.primary{padding:13px 36px}.secondary{padding:13px 25px;color:#d6e6ff;border:1px solid #869bbd;background:#152444;box-shadow:none;font-size:14px;letter-spacing:.03em}.result-actions{display:flex;justify-content:center;gap:12px}.big-score small{font-size:25px;color:#ffe4a9}
.touch-controls{display:none;gap:14px;margin-top:6px}.touch-controls button{flex:1;border-radius:14px;touch-action:none;user-select:none;color:#fff;background:#12315b;border:1px solid #71bce9;padding:16px 24px;font-size:18px;box-shadow:none}.touch-controls button:last-child{background:#402348;border-color:#e298d1}
button:focus-visible,summary:focus-visible,input:focus-visible{outline:3px solid #fff;outline-offset:3px}
@media(pointer:coarse){.touch-controls{display:flex}}
@media(max-width:700px){.panel{padding:14px 16px}.panel h1{font-size:22px}.panel h1 span{font-size:18px}.difficulty{padding:10px;min-height:95px}.difficulty strong{font-size:20px}.difficulty span{font-size:11px}.difficulty small{font-size:10px}.eyebrow{font-size:10px;letter-spacing:.2em}.instruction-row{gap:12px;margin:7px 0}.instruction-row>div{font-size:11px;gap:4px}.instruction-row img{width:33px;height:32px}.hold-example{width:62px;height:32px}.panel p,.key-guide{font-size:11px!important}.primary,.secondary{font-size:12px;padding:10px 25px}.timing-setting{margin:3px 0 8px;font-size:11px}.result-grid{margin:12px 0}.big-score{font-size:33px}}

.score-form{margin:16px auto}.score-form input{background:#101c42;color:white;border:1px solid #7e9bd6;border-radius:8px;padding:9px;max-width:180px}.ranking-table{width:100%;border-collapse:collapse;font-size:14px}.ranking-table td,.ranking-table th{padding:7px;border-bottom:1px solid #607ba644;text-align:left}.own-score{background:#30567988}#ranking-list{max-height:250px;overflow:auto}.panel{max-height:94%;overflow-y:auto}

.song-picker{display:block;margin:12px}.song-picker select{background:#15244c;color:white;border:1px solid #859ce6;border-radius:8px;padding:9px;max-width:90%}

.play-options{display:flex;align-items:flex-start;justify-content:center;gap:12px;margin:10px 0}.play-options button{padding:10px 20px}.play-options details{background:#101942;border:1px solid #698cd0;border-radius:12px;padding:10px 15px}.play-options summary{cursor:pointer}.play-options label{display:flex;align-items:center;gap:10px;margin:12px 0}.play-options input[type=range]{max-width:150px}.play-options output{min-width:40px}input[type=range]{accent-color:#83dfff}.touch-controls button:active{filter:brightness(1.6)}
@media(max-width:700px){.touch-controls{display:flex}.game-wrap:has(.overlay:not(.hidden)){min-height:560px}.difficulty-picker{gap:6px}.difficulty{min-width:0}.play-options{font-size:12px}.play-options input[type=range]{max-width:115px}.play-options details{padding:9px}.touch-controls{position:sticky;bottom:8px;z-index:2}.touch-controls button{min-height:62px}.song-picker{font-size:12px}}
@media(pointer:coarse) and (max-height:500px){body{padding:5px}.shell{max-width:760px}.touch-controls{display:flex;position:sticky;bottom:4px}.touch-controls button{padding:10px}.game-wrap:has(.overlay:not(.hidden)){min-height:360px}}

#history-list{max-height:290px;overflow:auto;text-align:left}.history-card{border:1px solid #698bc688;border-radius:10px;padding:12px;margin:9px 0;background:#122149}.history-card p{margin:5px 0}.history-card small{color:#bed6f1}

body{grid-template-columns:minmax(0,1fr)}.shell{min-width:0;max-width:100%}.panel{min-width:0}.overlay{min-width:0}@media(max-width:700px){.game-wrap:has(.overlay:not(.hidden)){aspect-ratio:auto;height:560px;min-height:560px}.panel{width:94%;max-width:100%;padding:14px 12px}.instruction-row{flex-wrap:wrap}.difficulty-picker{grid-template-columns:repeat(3,minmax(0,1fr))}}@media(pointer:coarse) and (max-height:500px){.game-wrap:has(.overlay:not(.hidden)){height:360px;min-height:360px}}

.touch-controls[data-layout=column]{flex-direction:column}.touch-controls.swapped{flex-direction:row-reverse}.touch-controls[data-layout=column].swapped{flex-direction:column-reverse}.play-options select{background:#13254a;color:white;border-radius:7px;padding:5px}.play-options{position:relative;z-index:3}
@media(max-height:500px) and (min-width:600px){body{padding:5px 85px}.shell{max-width:900px}header{padding-bottom:5px}.game-wrap{max-height:calc(100dvh - 92px)}.touch-controls{display:flex;position:fixed;inset:65px 5px 35px;pointer-events:none;justify-content:space-between;align-items:center;margin:0;z-index:4}.touch-controls button{pointer-events:auto;flex:none;width:72px;height:95px;padding:8px;font-size:15px}.touch-controls[data-layout=column]{left:auto;right:5px;flex-direction:column;justify-content:center;gap:8px}.touch-controls[data-layout=column].swapped{flex-direction:column-reverse}.play-options{margin:4px 0;font-size:11px}.play-options button{padding:7px 12px}.play-options details[open]{position:fixed;right:85px;bottom:10px;max-height:80dvh;overflow:auto;z-index:5}footer{padding:5px;font-size:10px}}

.key-settings label{display:flex;flex-wrap:wrap;gap:6px;align-items:center}.key-settings button{font-size:12px;padding:8px 10px}.key-settings #key-status{font-size:12px;max-width:340px}