*{margin:0;padding:0;box-sizing:border-box}body{font-family:Noto Sans JP,sans-serif;font-weight:300;background-color:#000;color:#fff;overflow:hidden;height:100vh}#app{display:flex;flex-direction:column;height:100vh}.logo-header{background-color:#e66f00;padding:3px 15px;display:flex;justify-content:space-between;align-items:center}.logo-header h1{font-size:18px;font-weight:500;color:#fff;letter-spacing:.1em}.fullscreen-btn{background:none;border:none;color:#fff;cursor:pointer;padding:5px;border-radius:50%;transition:background-color .2s;display:flex;align-items:center;justify-content:center}.fullscreen-btn:hover{background-color:#fff3}.fullscreen-btn .material-icons{font-size:24px}.main-container{display:flex;flex:1;overflow:hidden}.left-column{width:35%;background-color:#000;display:flex;align-items:center;justify-content:center;padding:20px}.video-wrapper{width:100%;max-width:100%;aspect-ratio:16 / 9}#player{width:100%;height:100%}.right-column{width:65%;background-color:#242424;overflow-y:auto}.album-list{height:100%}.album-section{border-bottom:1px solid #808080}.album-header{display:flex;align-items:center;padding:15px 20px;cursor:pointer;transition:background-color .2s}.album-header:hover{background-color:#333}.album-thumbnail{width:80px;height:80px;object-fit:cover;border-radius:4px;margin-right:15px}.album-info{flex:1;display:flex;align-items:center;gap:10px}.album-title{font-size:18px;font-weight:400;color:#fff;letter-spacing:.05em}.new-badge{background-color:#f44;color:#fff;padding:3px 8px;border-radius:3px;font-size:12px;font-weight:500}.track-list{background-color:#1a1a1a}.track-item{padding:10px 20px 10px 35px;border-bottom:1px solid #808080;cursor:pointer;transition:background-color .2s}.track-item:hover{background-color:#2a2a2a}.track-item.active{background-color:#e66f00;font-weight:500}.track-info{display:flex;align-items:center;gap:15px;min-height:38px}.track-name{font-size:13px;color:#fff;letter-spacing:.03em;min-width:120px}.track-description{font-size:13px;color:#b0b0b0;letter-spacing:.02em;font-weight:300}.track-item.active .track-description{color:#fff;opacity:.9}.control-bar{background-color:#e66f00;display:flex;justify-content:center;align-items:center;gap:20px;padding:3px 20px}.control-btn{background:none;border:none;color:#fff;cursor:pointer;padding:10px;border-radius:50%;transition:background-color .2s;display:flex;align-items:center;justify-content:center}.control-btn:hover{background-color:#ffffff1a}.control-btn .material-icons{font-size:36px}.seek-section{flex:1;display:flex;align-items:center;gap:15px;margin-left:20px}.time-display{font-size:14px;font-weight:300;color:#fff;min-width:40px;text-align:center}.seek-bar{flex:1;-webkit-appearance:none;-moz-appearance:none;appearance:none;height:6px;background:#ffffff4d;border-radius:3px;outline:none;cursor:pointer}.seek-bar::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:16px;height:16px;background:#fff;border-radius:50%;cursor:pointer;transition:transform .2s}.seek-bar::-webkit-slider-thumb:hover{transform:scale(1.2)}.seek-bar::-moz-range-thumb{width:16px;height:16px;background:#fff;border-radius:50%;border:none;cursor:pointer;transition:transform .2s}.seek-bar::-moz-range-thumb:hover{transform:scale(1.2)}.seek-bar::-moz-range-track{background:#ffffff4d;height:6px;border-radius:3px}.volume-section{display:flex;align-items:center;gap:10px;margin-left:20px}.volume-btn{background:none;border:none;color:#fff;cursor:pointer;padding:5px;border-radius:50%;transition:background-color .2s;display:flex;align-items:center;justify-content:center}.volume-btn:hover{background-color:#ffffff1a}.volume-btn .material-icons{font-size:24px}.volume-bar{width:100px;-webkit-appearance:none;-moz-appearance:none;appearance:none;height:6px;background:#ffffff4d;border-radius:3px;outline:none;cursor:pointer}.volume-bar::-webkit-slider-thumb{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:14px;height:14px;background:#fff;border-radius:50%;cursor:pointer;transition:transform .2s}.volume-bar::-webkit-slider-thumb:hover{transform:scale(1.2)}.volume-bar::-moz-range-thumb{width:14px;height:14px;background:#fff;border-radius:50%;border:none;cursor:pointer;transition:transform .2s}.volume-bar::-moz-range-thumb:hover{transform:scale(1.2)}.volume-bar::-moz-range-track{background:#ffffff4d;height:6px;border-radius:3px}.right-column::-webkit-scrollbar{width:8px}.right-column::-webkit-scrollbar-track{background:#1a1a1a}.right-column::-webkit-scrollbar-thumb{background:#555;border-radius:4px}.right-column::-webkit-scrollbar-thumb:hover{background:#777}@media (orientation: portrait){body:before{content:"このアプリは横置きモードでご利用ください";position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);font-size:20px;text-align:center;z-index:9999}}