*{margin:0;padding:0;box-sizing:border-box;touch-action:manipulation}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);min-height:100vh;padding:20px;display:flex;flex-direction:column;align-items:center}.container{max-width:1200px;width:100%;background:white;border-radius:12px;box-shadow:0 10px 40px #0003;padding:30px}h1{text-align:center;color:#333;margin-bottom:30px;font-size:2em}.song-info-section{text-align:center;margin-bottom:15px;padding:12px 15px;background:#f8f9fa;border-radius:12px}.song-info-title{font-size:1.2em;font-weight:700;color:#333;margin-bottom:4px;word-break:break-word;display:flex;align-items:baseline;justify-content:center;flex-wrap:wrap;gap:4px}.song-info-title .title{font-size:1.2em;font-weight:700;color:#333}.song-info-title .artist{font-size:.85em;color:#777}.song-info-artist{font-size:.85em;color:#777;margin-bottom:8px}.song-info-details{display:flex;flex-wrap:wrap;justify-content:center;gap:1px;margin-top:12px;border:1px solid #ccc;border-radius:4px;overflow:hidden}.song-info-table-cell{flex:1;min-width:60px;padding:6px 8px;border-right:1px solid #ccc;display:flex;flex-direction:row;align-items:center;justify-content:center;gap:4px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.song-info-table-cell:last-child{border-right:none;flex-basis:100%;border-top:1px solid #ccc}.song-info-table-cell .label{font-size:.85em;color:#666;font-weight:600;padding-right:6px;border-right:1px solid #ddd}.song-info-table-cell .value{font-size:.85em;color:#333;font-weight:600;padding-left:6px}.youtube-search-button{display:inline-flex;align-items:center;gap:4px;margin-top:10px;padding:6px 16px;background:#ff0000;color:#fff;border:none;border-radius:8px;font-size:.85em;font-weight:600;cursor:pointer;transition:all .3s ease}.youtube-search-button:hover{background:#cc0000;transform:translateY(-1px)}.chart-tags-section{margin-top:12px;padding-top:12px;border-top:1px solid #eee}.chart-tags-header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px}.chart-tags-label-group{display:flex;align-items:center;gap:4px}.chart-tags-label{font-size:.85em;font-weight:600;color:#555}.chart-tags-label-group .help-button{width:24px;height:24px;font-size:.8em}.request-tag-button{padding:4px 12px;background:#6366f1;color:#fff;border:none;border-radius:8px;font-size:.8em;font-weight:600;cursor:pointer;transition:all .2s ease}.request-tag-button:hover:not(:disabled){background:#4f46e5;transform:translateY(-1px)}.request-tag-button:disabled{background:#aaa;cursor:not-allowed}.chart-tags-list{display:flex;flex-wrap:wrap;gap:6px}.chart-tag-badge{display:inline-block;padding:3px 10px;border-radius:12px;font-size:.8em;font-weight:600;background:#e0e7ff;color:#4338ca}.chart-tag-link{text-decoration:none;cursor:pointer;transition:background .2s ease,transform .15s ease}.chart-tag-link:hover{background:#c7d2fe;transform:translateY(-1px)}.chart-tags-empty{font-size:.8em;color:#999}.tag-request-modal{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.5);z-index:1000;align-items:center;justify-content:center;padding:16px}.tag-request-modal.show{display:flex}.tag-request-content{background:white;border-radius:12px;width:100%;max-width:480px;max-height:80vh;display:flex;flex-direction:column;overflow:hidden}.tag-request-modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid #eee}.tag-request-modal-header h3{margin:0;font-size:1.1em}.tag-request-close{background:none;border:none;font-size:1.5em;line-height:1;cursor:pointer;color:#888}.tag-request-modal-body{padding:16px;overflow-y:auto}.tag-request-quota{margin:0 0 12px;font-size:.9em;color:#555}.tag-request-group{margin-bottom:10px}.tag-request-group-label{font-size:.8em;color:#888;margin-bottom:4px}.tag-request-chips{display:flex;flex-wrap:wrap;gap:8px}.tag-request-chip{display:inline-flex;align-items:center;gap:4px;padding:5px 10px;border:1px solid #ddd;border-radius:16px;font-size:.85em;cursor:pointer;-webkit-user-select:none;user-select:none}.tag-request-chip.is-disabled{opacity:.5;cursor:not-allowed}.tag-already{font-size:.85em;color:#999}.tag-request-modal-footer{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px;border-top:1px solid #eee}.tag-request-status{font-size:.8em;color:#555;flex:1}.tag-request-submit{padding:8px 20px;background:#6366f1;color:#fff;border:none;border-radius:8px;font-weight:600;cursor:pointer}.tag-request-submit:disabled{background:#aaa;cursor:not-allowed}.tag-request-error{color:#dc2626}.chart-section{display:flex;flex-direction:column;align-items:center;margin-bottom:20px}.chart-area{position:relative;width:100%;max-width:500px;aspect-ratio:1;background:#1a1a2e;border-radius:8px;box-shadow:0 4px 15px #0000004d}.playback-control-section{display:flex;flex-direction:column;align-items:center;gap:8px;justify-content:center;margin-bottom:15px;padding:5px 20px;background:#f8f9fa;border-radius:8px}#chartCanvas{width:100%;height:100%;border-radius:8px}.input-section{display:flex;flex-direction:column;margin-top:30px}.input-section h2{color:#333;margin-bottom:15px;font-size:1.3em}#simaiInput{width:100%;height:400px;padding:15px;border:2px solid #ddd;border-radius:8px;font-family:Courier New,monospace;font-size:14px;resize:vertical;transition:border-color .3s}#simaiInput:focus{outline:none;border-color:#667eea}.controls-section{background:#f8f9fa;padding:25px;border-radius:8px;margin-top:20px}.control-group{margin-bottom:20px}.control-group:last-child{margin-bottom:0}.control-group label{display:block;font-weight:600;color:#333;margin-bottom:10px;font-size:1em}.note-count-graph{width:calc(100% - 20px);height:60px;background:#f8f9fa;border:1px solid #ddd;border-radius:4px;margin-bottom:5px;margin-left:10px;margin-right:10px;cursor:pointer}.slider-container{display:flex;align-items:center;gap:15px;margin-bottom:0;padding-left:10px;padding-right:10px}.slider-ticks{position:relative;height:15px;margin:2px 20px 20px;z-index:1}.slider-ticks span{position:absolute;width:2px;height:8px;background:#999;transform:translate(-50%)}.slider-ticks span.major{height:12px;background:#667eea}.slider-ticks .tick-label{position:absolute;top:15px;transform:translate(-50%);font-size:10px;color:#666;width:auto;height:auto;background:none}input[type=range]{flex:1;height:6px;border-radius:3px;background:#ddd;outline:none;-webkit-appearance:none;position:relative;z-index:2}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:20px;height:20px;border-radius:50%;background:#667eea;cursor:pointer;transition:background .3s}input[type=range]::-webkit-slider-thumb:hover{background:#764ba2}input[type=range]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:#667eea;cursor:pointer;border:none;transition:background .3s}input[type=range]::-moz-range-thumb:hover{background:#764ba2}.value-display{min-width:80px;text-align:center;font-weight:600;color:#667eea;font-size:1.1em;background:white;padding:8px 15px;border-radius:6px;box-shadow:0 2px 5px #0000001a}.hispeed-control{display:flex;align-items:center;gap:15px}input[type=number]{width:100px;padding:10px;border:2px solid #ddd;border-radius:6px;font-size:1em;text-align:center;transition:border-color .3s}input[type=number]:focus{outline:none;border-color:#667eea}.playback-controls{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap}.control-button{padding:12px 20px;border:none;border-radius:6px;font-size:1.2em;font-weight:600;cursor:pointer;transition:all .3s;background:#667eea;color:#fff;min-width:50px}.control-button:hover:not(:disabled){background:#764ba2;transform:translateY(-2px);box-shadow:0 4px 8px #0003}.control-button:disabled{background:#ccc;cursor:not-allowed;opacity:.6}#playPauseButton{background:#28a745}#playPauseButton:hover:not(:disabled){background:#218838}#playPauseButton.playing{background:#ffc107}#playPauseButton.playing:hover:not(:disabled){background:#e0a800}#playPauseButton{font-size:1.4em;padding:17px 30px;flex:2 1 0}#restartButton{font-size:1.4em;padding:12px 15px;flex:1 1 0}.playback-controls:has(#restartButton){min-width:500px}#restartButton{background:#17a2b8}#restartButton:hover:not(:disabled){background:#138496}.playback-speed{display:flex;align-items:center;gap:8px}.playback-speed label{margin:0;font-weight:400}.playback-speed input[type=number]{width:70px;padding:8px}.error-message{background:#fee;border:2px solid #fcc;color:#c33;padding:15px;border-radius:8px;margin-top:20px;display:none}.error-message.show{display:block}.toggle-switch{position:relative;width:44px;height:24px;background:#ccc;border-radius:12px;transition:background .3s;flex-shrink:0}.toggle-switch:after{content:"";position:absolute;top:2px;left:2px;width:20px;height:20px;background:white;border-radius:50%;transition:transform .3s;box-shadow:0 2px 4px #0003}input[type=checkbox]:checked+.toggle-switch{background:#667eea}input[type=checkbox]:checked+.toggle-switch:after{transform:translate(20px)}.settings-button{display:inline-flex;align-items:center;justify-content:center;padding:0 15px;height:35px;background:#667eea;color:#fff;border-radius:12px;border:none;font-size:1em;font-weight:600;cursor:pointer;transition:all .3s ease;flex-shrink:0;white-space:nowrap}.settings-button:hover{background:#764ba2;transform:translateY(-2px)}.answer-sound-toggle{display:flex;align-items:center;gap:8px;cursor:pointer;padding:8px 12px;background:#f8f9fa;border-radius:8px;transition:background .2s;white-space:nowrap}.answer-sound-toggle:hover{background:#e9ecef}.answer-sound-toggle span{font-weight:600;color:#333;font-size:.95em}.settings-popup{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,.5);z-index:1000;justify-content:center;align-items:center}.settings-popup.show{display:flex}.settings-content{position:relative;background:white;border-radius:12px;padding:30px;max-width:500px;width:90%;max-height:80vh;overflow-y:auto;box-shadow:0 10px 40px #0000004d}.saved-chart-item{display:flex;align-items:center;gap:8px;padding:8px;border-radius:4px;margin-bottom:6px;background:#f8f9fa;transition:background .2s}.saved-chart-item:last-child{margin-bottom:0}.saved-chart-item:hover{background:#e9ecef}.saved-chart-delete{width:24px;height:24px;display:flex;align-items:center;justify-content:center;background:#dc3545;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:.9em;flex-shrink:0;transition:background .2s}.saved-chart-delete:hover{background:#c82333}.saved-chart-button{flex:1;padding:10px 12px;border:2px solid #17a2b8;background:white;color:#17a2b8;border-radius:4px;font-size:.95em;cursor:pointer;text-align:left;transition:all .2s}.saved-chart-button:hover{background:#17a2b8;color:#fff}.saved-chart-name{font-weight:700;margin-bottom:2px}.saved-chart-date{font-size:.8em;color:#666}.settings-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:25px;padding-bottom:15px;border-bottom:2px solid #f0f0f0}.settings-header h2{margin:0;color:#333;font-size:1.5em}.close-button{position:sticky;top:-10px;left:calc(100% - 50px);background:white;border:none;font-size:1.4em;color:#999;cursor:pointer;padding:4px;width:28px;height:28px;display:flex;align-items:center;justify-content:center;transition:all .3s;border-radius:50%;box-shadow:0 2px 8px #0000001a;z-index:10;margin-left:auto;margin-bottom:-28px}.close-button:hover{color:#333;box-shadow:0 4px 12px #00000026}.settings-option{margin-bottom:10px}.settings-option:last-child{margin-bottom:0}.settings-option-label{display:flex;align-items:center;gap:10px;cursor:pointer;padding:10px;border-radius:8px;transition:background .2s;flex-direction:row-reverse;justify-content:space-between}.settings-option-label:hover{background:#f8f9fa}.settings-section-title{margin:15px 0 10px;padding-bottom:8px;border-bottom:1px solid #e0e0e0;color:#555;font-size:1.1em;font-weight:600;display:flex;align-items:center;gap:8px}.settings-section-title:first-of-type{margin-top:0}.section-info-button{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;background:#667eea;color:#fff;border-radius:50%;border:none;font-size:.8em;cursor:pointer;transition:all .2s;flex-shrink:0}.section-info-button:hover{background:#764ba2;transform:scale(1.1)}.section-info-content{display:none;background:#f8f9fa;border-left:3px solid #667eea;padding:12px 15px;margin:10px 0;border-radius:4px;line-height:1.6;color:#555;font-size:.95em}.section-info-content.show{display:block}.section-info-content p{margin:0 0 8px}.section-info-content p:last-child{margin-bottom:0}.mirror-buttons{display:flex;gap:6px;justify-content:flex-end;flex:1;flex-wrap:wrap}.mirror-button{padding:4px 12px;border:2px solid #ddd;border-radius:6px;background:white;color:#333;font-size:.95em;cursor:pointer;transition:all .2s ease;white-space:nowrap;min-width:45px}.mirror-button:hover{background:#f8f9fa;border-color:#667eea}.mirror-button.active{background:#667eea;color:#fff;border-color:#667eea}.simai-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;flex-wrap:wrap;gap:8px}.simai-buttons{display:flex;gap:10px;flex-wrap:wrap}.simai-buttons-row{display:flex;gap:6px}.simai-btn{padding:6px 12px;font-size:.75em}.green-btn{background:#28a745;color:#fff}@media (max-width: 768px){h1{font-size:1.5em}.simai-header{flex-direction:column;align-items:stretch}.simai-buttons{flex-direction:column;gap:6px}.simai-buttons-row{width:100%}.control-button.simai-btn{flex:1;font-size:.5em}.container{padding:15px}.chart-section{margin-bottom:10px}.chart-area{max-width:100%}.playback-control-section{padding:5px;margin-bottom:10px;width:100%}.playback-controls{gap:3px;flex-wrap:nowrap;width:100%;justify-content:space-between}.control-button{padding:8px 6px;font-size:.9em;min-width:0;flex:1}#playPauseButton{font-size:1em;padding:17px 10px;flex:2 1 0}#restartButton{flex:1 1 0}.playback-controls:has(#restartButton){min-width:0}.controls-section{padding:15px}.control-group{margin-bottom:25px}.song-info-table-cell{font-size:.8em}#simaiInput{height:300px}.settings-content{padding:20px;width:95%}.settings-header h2{font-size:1.3em}.answer-sound-toggle{padding:6px 10px}.answer-sound-toggle span{font-size:.9em}.mirror-button{font-size:.85em;padding:3px 8px;min-width:40px}#playbackSpeedDecrement,#playbackSpeedIncrement,#hiSpeedDecrement,#hiSpeedIncrement{padding:8px 4px!important;font-size:.85em!important;min-width:24px!important;max-width:30px!important}#answerSoundOffsetDecrement10,#answerSoundOffsetDecrement1,#answerSoundOffsetIncrement1,#answerSoundOffsetIncrement10{padding:6px 4px!important;font-size:.8em!important;min-width:28px!important;max-width:35px!important}}@media (min-width: 1024px){body{overflow:hidden;height:100vh;padding:10px}.container{display:grid;grid-template-columns:5fr 5fr;column-gap:24px;align-items:start;padding:15px 30px 30px;height:calc(100vh - 20px);overflow:hidden}.container>div:first-child{grid-column:1}.chart-section{grid-column:1;grid-row:2;margin-bottom:0}.playback-control-section{margin-bottom:0;grid-column:1;grid-row:3}.right-column{grid-column:2;grid-row:1 / span 100;display:flex;flex-direction:column;gap:15px;overflow-y:auto;max-height:calc(100vh - 50px)}.right-column .controls-section,.right-column .input-section{margin-top:0}.playback-controls{flex-wrap:nowrap;width:100%}.playback-controls .control-button{padding:3px 0;font-size:.95em;min-width:0;flex:1}#playPauseButton{font-size:1.1em;padding:6px 0;flex:2 1 0}#restartButton{font-size:1.1em;padding:6px 0;flex:1 1 0}.playback-controls:has(#restartButton){min-width:0}}.help-button{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:#667eea;color:#fff;border:none;border-radius:8px;font-size:1.2em;cursor:pointer;transition:all .2s ease;flex-shrink:0}.help-button:hover{background:#764ba2;transform:translateY(-2px)}@media (max-width: 600px){.help-button{width:28px;height:28px;font-size:.9em;border-radius:6px}}.help-modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;padding:20px}.help-modal{width:100%;max-width:480px;max-height:80vh;background:white;border-radius:16px;box-shadow:0 15px 50px #0000004d;display:flex;flex-direction:column;overflow:hidden}.help-modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:2px solid #f0f0f0}.help-modal-title{font-size:1.05em;font-weight:700;color:#333}.help-modal-close{background:none;border:none;font-size:1.4em;line-height:1;color:#999;cursor:pointer;padding:4px}.help-modal-close:hover{color:#333}.help-modal-body{overflow-y:auto;padding:20px;color:#333;font-size:.9em;line-height:1.6}.help-modal-body p{margin:0 0 12px}.help-modal-body h4{margin:20px 0 6px;padding-bottom:4px;border-bottom:2px solid #f0f0f0;color:#667eea;font-size:1.05em}.help-modal-body h4:first-child{margin-top:0}.help-modal-body ol{margin:0 0 12px;padding-left:1.5em}.help-modal-body img{display:block;max-width:min(100%,300px);margin:8px auto 12px;border:1px solid #e0e0e0;border-radius:8px}.help-modal-body .help-section-note{margin-bottom:8px;font-size:.95em}.help-modal-body dl{margin:0 0 16px}.help-modal-body dt{margin-top:10px;font-weight:700}.help-modal-body dd{margin:2px 0 0;color:#555}.help-modal-body a{color:#667eea}.help-modal-body .help-warning{color:#d32f2f}.help-modal-body details{margin:8px 0 12px;padding:8px 12px;border:1px solid #e0e0e0;border-radius:8px}.help-modal-body summary{cursor:pointer;font-weight:700;color:#667eea}