*{box-sizing:border-box;margin:0;padding:0}html,body{background-color:#000;color:#fff;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,monospace;width:100vw;height:100vh;overflow:hidden;-webkit-user-select:none;user-select:none;touch-action:none}#app{position:relative;width:100vw;height:100vh;display:flex;align-items:center;justify-content:center;background-color:#000}.video-container{position:relative;display:inline-block;max-width:100vw;max-height:100vh;line-height:0}#webcam{display:block;max-width:100vw;max-height:100vh;width:auto;height:auto;transform:scaleX(-1)}#output-canvas{position:absolute;top:0;left:0;width:100%;height:100%;transform:scaleX(-1);pointer-events:none}.debug-panel{display:none!important;position:absolute;bottom:calc(12px + env(safe-area-inset-bottom,0px));left:calc(12px + env(safe-area-inset-left,0px));background-color:#000c;border:1px solid #333333;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:8px 12px;border-radius:4px;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:11px;line-height:1.4;color:#ccc;z-index:100;display:flex;flex-direction:column;gap:3px;pointer-events:none}.debug-row{display:flex;align-items:center;gap:6px}.debug-label{color:#777;font-weight:700}.debug-sublabel{color:#555;font-size:10px}.debug-val{color:#fff;font-weight:600}.debug-separator{color:#444;margin:0 2px}.debug-divider{width:100%;height:1px;background-color:#222;margin:2px 0}.debug-error{color:#f55;font-weight:700;margin-top:4px;border-top:1px solid #442222;padding-top:4px;max-width:320px;word-break:break-word}.hidden{display:none!important}.csv-upload-btn{pointer-events:auto;cursor:pointer;background-color:transparent;color:#888;border:1px solid #444444;padding:1px 5px;border-radius:2px;font-size:9px;letter-spacing:.5px;transition:all .15s ease;-webkit-user-select:none;user-select:none;margin-left:auto}.csv-upload-btn:hover{background-color:#fff;color:#000;border-color:#fff}.spike-highlight{background-color:#fff;color:#000!important;padding:0 4px;border-radius:2px;font-weight:700}.song-guide-panel{display:none!important;position:absolute;top:calc(12px + env(safe-area-inset-top,0px));left:50%;transform:translate(-50%);background-color:#000000d9;border:1px solid #333333;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);padding:8px 16px;border-radius:6px;display:flex;flex-direction:column;align-items:center;gap:6px;z-index:100;pointer-events:none;max-width:92vw}.song-header{display:flex;align-items:center;gap:10px;font-size:11px;color:#888}.song-title{color:#fff;font-weight:700;letter-spacing:.5px}.song-phrase-badge,.song-step-badge{background-color:#1a1a1a;border:1px solid #333333;color:#aaa;padding:1px 6px;border-radius:3px;font-size:10px;font-family:monospace}.song-notes-stream{display:flex;align-items:center;gap:6px;overflow:hidden;padding:4px 0}.note-chip{display:flex;flex-direction:column;align-items:center;justify-content:center;width:36px;height:42px;border:1px solid #2a2a2a;background-color:#ffffff08;border-radius:4px;color:#666;font-family:monospace;transition:all .2s cubic-bezier(.2,0,0,1)}.note-chip-num{font-size:14px;font-weight:700;line-height:1.1}.note-chip-name{font-size:9px}.note-chip.current{border-color:#fff;background-color:#fff;color:#000;transform:scale(1.1);box-shadow:0 0 10px #fff6}.note-chip.done{border-color:#1a1a1a;background-color:transparent;color:#333;opacity:.4}.song-select-container{position:absolute;top:calc(16px + env(safe-area-inset-top,0px));right:calc(16px + env(safe-area-inset-right,0px));z-index:200;pointer-events:auto}.song-select-btn{width:38px;height:38px;border-radius:50%;background-color:#0f0f0fd9;border:1px solid rgba(255,255,255,.4);color:#fff;font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center;-webkit-user-select:none;user-select:none;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:all .15s ease;box-shadow:0 2px 8px #00000080}.song-select-btn:hover{background-color:#fff;color:#000;border-color:#fff}.song-select-btn:active{transform:scale(.92)}.song-select-menu{position:absolute;top:46px;right:0;min-width:140px;background-color:#0f0f0ff2;border:1px solid #333333;border-radius:6px;padding:6px;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 6px 20px #000000b3;display:flex;flex-direction:column;gap:4px}.song-menu-header{font-size:10px;color:#888;padding:4px 8px;border-bottom:1px solid #262626;margin-bottom:2px;letter-spacing:.5px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.song-menu-item{width:100%;text-align:left;padding:7px 10px;background-color:transparent;border:1px solid transparent;border-radius:4px;color:#ccc;font-size:12px;cursor:pointer;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;transition:all .15s ease}.song-menu-item:hover{background-color:#ffffff1a;color:#fff}.song-menu-item.active{background-color:#fff;color:#000;font-weight:600}.countdown-overlay{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;background-color:#0006;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);z-index:300;pointer-events:none}.countdown-text{font-size:76px;font-weight:800;color:#fff;letter-spacing:2px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,monospace;text-shadow:0 0 16px rgba(0,0,0,.9),0 0 32px rgba(255,255,255,.4);-webkit-user-select:none;user-select:none;transition:transform .18s cubic-bezier(.175,.885,.32,1.275)}