// ==UserScript==
// @name                YouTube Music volume control shortcut added
// @name:ja             YouTube Music volume control shortcut added
// @name:en             YouTube Music volume control shortcut added
// @name:zh-CN          YouTube Music volume control shortcut added
// @name:ko             YouTube Music volume control shortcut added
// @name:ru             YouTube Music volume control shortcut added
// @name:de             YouTube Music volume control shortcut added
// @description         YouTube Musicで音量を変更するキーボードショートカットを追加
// @description:ja      YouTube Musicで音量を変更するキーボードショートカットを追加
// @description:en      Add keyboard shortcuts to change the volume of YouTube Music
// @description:zh-CN   添加键盘快捷键来改变YouTube Music的音量
// @description:ko      YouTube Music의 볼륨을 변경하는 키보드 단축키 추가
// @description:ru      Добавьте сочетания клавиш для изменения громкости YouTube Music
// @description:de      Fügen Sie Tastaturkürzel hinzu, um die Lautstärke von YouTube Music zu ändern
// @version             1.0.1
// @author              Yos_sy17
// @match               https://music.youtube.com/*
// @namespace           http://tampermonkey.net/
// @icon                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XzBGdwB4dw6Q6kNoPjMO/ZSfZ8fsYoe4KV/WaWFBxl4jRLrMj3Yz+ToexlXkcHDB421tjp/5IWveLG1Mfn6eP+j5o1fiNtMV21J49/aclvvPGGXeqlpaXlK4sWLdLWrVtzkO/zQjZu3Kj5pksPvxuWjIwMvf3223aZGcyP//7666/VucU9Wtl9qLJwGmEDtmATtmEjtmKzXyaCRazmAgh5wRncwaE7kLrCcpvX/QT2Zg4uMOAMO8eYOcnKYUY2Ppi9hguJRoLrfPJkUsS4SNdI6wCg6Yul+cvMOPqCssbO1vYuw9X6hjraaCZw+ZFXEClICr+Tn+SW+PuXZqnY7o6GWtsh2dqALdYmbMNGbMVmbAcDsIi1n4A84Q4O4RJO7f0EXMCRy00l7gqT9JH2IgPWsWwwcKKVQ410U+ECohFPPsKyiIkKkyPGR7pIWglALX7Fbsz82HecOifeqFXvvGsdMYdKohJ8apaTzFe+6jXGbTJhE7ZhI7ZiM7aDAVjE2k8AZ3AHh3AJp3ALx4brMP90/6z7Z9nuggsN8GThWMCdyeHGcAGFFRwWTHrwiuEYYZLC8ogZMpMkxkm6SlqLAWzvqBkaWbOeFpuuO+iRO1QS+q5c8V/1qH6zdo/4u6sE2IaN2IrN2A4GYAEmYANGsXCtwxncwSFcwincwnFqLn4BcZkR99lwpQmOBMYnzrYzlqBUuIDCCpsi+MUZ8/CO4SBhjcwyyc/2GS/HzlHWoFS9UK+thg1KtuPsoZoyje5Tn5isWXWaSoMet7ZZG/3qANvBACzABGzACKzC+BVW4Azu4BAu4RRu3Z1FV4f5pwdoai814l4bJg/4luma2NWKxSyVZQ81EmVwkeIlw1HCWtnP9pk09R2vrxp0V7ubbtW33357yLX8YEL33bt2677GzfVxvSTnHcRGvzrAdjAACzABGzACqzB+hRW7yqruOIRLOIVbODZch/lnCZhkb7aiq+B+G39GP1brfpTBS0V31CJ5n3sXhwlrZpZNo2cqs2WyRl1aXS8vW3ZIk+8TNny0Zo16XV5Nv7QYZG20tmIztnu3MZiADRiBVRi/wor3C/i7CeAUbuHYcL2P+NS0G62wfcgYwQ1XBDjEIsIne9JX0W1Zsk3KThkTEu/exWu29DXXNfYZr3U3tFLPNu2VuWf/JdahmrAhc2+mRg8Zqjeub+Iid7AVm7Hdu43BBGzACKyKGmMYjiCCU7i18wAuoUi7BKHlc/tmL3vBIb5j4t+46Sqb/GgViBTuY/jo2ujmcE+yY8amCX5zXKeR62L2Nh+kPuWras3q1YcF+T5hy/+++EIdrq6u3c0G7LsWBtvBACzABGzACKxiEWPoGyB5wCncUra7zNLyTgXgelOuX/3arhe56w4vUlHXpbwfjOEjWoaACfbMmQCxc0ZLeORJqfc4G9y4tmpT9enY+ZCe+OWVWMaOHz1GL1eqrywCObEZ28EALMAEbMAIrGIRYxj0u8Ap3MIxXEd4T7B33CI4LLjtkvAm6/nLJcPCSDiGj+UIUTMETrB3zvYpY+ADT9iuKbNKKz18XiW99+67h1Xr9wmbtm7Zol7lqmhvYivXHWM7GIAFmIANGPmYi1jFGMKl9Qy2dRzD9WTHe4L1ECF4p7jylNgyliLhTAorjDvB0G0KJ3SK6BkCKJCZz7hjTjXaa8d5t6pr3YbatWtXGLvDJtGz9e7QSZv/WsuFmGM7GHg8wAaMwCoYch6LVRicwi0cw3WE9wR727W/dZt7b1mKcPtlOIPCij/P5kO3CZ5ktksIFVE0r7wtjTdKtBmsrIrNtPTMipo54x+F2pI91BK9wGsvv6KUM8pZm7HdYgAWYAI2YARWwZBzsAzjW1iBU7iFY3/LuZEE+z/+1m0uPya4kFoXzqCwQoRKMHSbCFp728VC5wlb+LJTolEfZV5cXz3/VM66T6Pt/nnvQFLQFH4vN4k2/bDze91XLlG7L77TBW2AAViACdiAEVgFQ85jEYEFp3ALx/6WcyMJdm2IoAzOAi5BZj85nEFhhQLxbnGAghh6tiWJU5tilj3zXpT+vsgpUTtJ35eupc4314va38+w8dxzz9ldwbzkzTffPODkEmLZzWNHMPy+F3YCiTyOthKgw0Od79eW0n+ztlsMwAJMwMaHnIMZ2IFhLBoknMItHMN1hPcE+/EDhDvw6Za4CZvZZziDworfjeIUDVugGMYGSGqGq+ljnnQ1sVprvfX7ynp8zKNRVQCIePHFF3XyySerVKlSeUrp0qX1+eefh1/fL5HX8OHDddxxx+V4Pyi1a9fOEVRS0MQQ97SpRM+ccbW13WIAFmACNmAEVmAGdrHajYVTuIVjuI7wnmCDBhA+hMDWJIcMYrH5wyyWc3QcpRo+3blAJ6S57VC8YYx11MSrm+qJ08rq9Vdfi7pVEenzwAMPqGvXrrlKly5dNGHChAOSRvlE+PTo0SNHHkEhtiDauQplrP3oIw350xXWdosBWIAJ2ICRP4EEdmAIlmF8CytwCrdwDNcR3hPsjBMJTjpiEfRJtAszXZwbGDT7n+5fzrRzopVxji7wsobqX/pyfbZtW9QVgPd8aFheUtCxu6B5FSURetax3LXKxD0LBmABJmATxArswBAsw/gWVuA0OCmP8J5gv4WD8EkUughqWyx2o4hQ5UQt4xnboMTJTZnvPFEdhpuZbndbu/ecV1fdrq6RI1DzcE7sEnasU0+7zNLXtnCwABOwASOwAjMbktfZYRnGt7ACp/ZM5a2O6wjvCfaEKcK2Id6iU6+LTdQvZ+pxPXKylt0vNj9Y5rAH7oNNTHe04083qnf9xjlCtQ/nRA/yQJdu+vTsGpEuuZ3DBGzACKzADOzAECzD+BZWfNQwHMN1hPcEe9sE4g818omUojgerPv4apcfkxiiUlnnLv/AzHYXu80QjGL8u7Cetp9xnfp1SLJda7wTwBNMmttwEPztYKTU0Y9opZn82tO9YAEmYANGYAVmYAeGYOlxDeNdUIFTuPWHbCO8J9g4cgRXITXEf5whnEFBxCuJ65I9aMKSOWO/co303noXFcOyh21PxiIzKfn01EQN6zcgqhVAYRPnA+vVq6fJkyfrp59+yh7v6X1Y4t1yyy3asGHDQakEc6bP0KunVHATM7AAE7ABI7ACM7ADQ7AE06JUAjiFWziG6wjvCdZD5L+9U+TNhwj5FMbhBDY9uGhhzSZp3WZ3CQNHlji58qfayjJj0vvHV9CYYcMPCuj4CwjlPuuss1StWjV7tmDFihW69dZbdeaZZ9oZ/sGaiyxMN0vBE8q6cdlgYTEBGzACKzADOzAES7s7G6kEYdwLIuHNuQjvCfYjiQi1gweiPajgyed9xhu6Nq5aYUzbsEXauM0Zx8FFXJKn11DWyVW1olQ5PTZqNH3wfgD5bjqWFcO3eI6K161bVyeccIJOOukkJSYmavny5TnCvIua8rPhmYULlVaqjMGgmsXCYgI2YARWYAZ2YAiWYAq20VYC3uF9OIbrCO8J1s9s78iLkB/t/rMvwJ/0IbKF5Q0bHBu2Sh9vdd0bMXDMQo3hWUaRFceU1VhTATxQEMQJXAhZaEDCw7du3bo8x+7CJN6lhY8fP946hsqXL6/KlSvb1o8fAX9CUfIn8T4ViZPIr7zyivUqLlu2zB4tDx4isRXg2IssBjZiB0zABozACszADgzBsqgniXjHB4fAdYT3BPu5VCsB8qPZCrZdTKV9XQw3bhH2nG3QFjfBwQVZ5g5beNax12jF0ZfaCgBotEycMJ06ddIjjzyiOXPmaPr06Ro4cKBat26tGTNm6IcffoiaJGIMr7/+ev35z3/WyJEj7f+T35QpU3T++efbCrFp06ao8ucdLpmAdM4f3n///UpJSdHcuXM1adIk9ezZ0548evbZZ21FsBXgNxcaDCo5MsAEbMAIrHyDAUOwzB6iK0U3RIcP40Z4T8ieWGRLLi8XRGzY97WuNrP1uF+XZoxZ/yknVaWWyW5MM89nGUNWJFxihoBR9khWx44d7fFtgPQOF/6lckDUrFmzLLh5nfA5UKIXmTp1qjZu3Lifc4j/5mIIiKJSFDaRB17GESNGKDk52bqcc7OBHmaUsZUjbWmznlLa0RdYDCx2YAI2YARWYBYcMsEUbME42vgAXwkCkpDjoWjFzjKvdbducvEid+9x/RoRL74CsNnBpIZZrXknywgV4Ibq12nokKF2kpYfsfz2/vvv26Pc0bbUvFK0eXnyH3roIdtj5TeP8JVh6dKlqnJNJc1NOM9iYPEDE7ABI18BwA4MwRJMwRaMo12l5SLFXgFeTLhIbVrec8BLHnziGU7iNm7c2LbkgrwTr+TJZ/7AMtL3KPkl/8wc0wOMKnXukV0BfjHS9bwK2rqlcF26rwT0BMVVCYItH/IL68iiwvds1kobjyrn8DsSK8BrR12s8SNHFxo8UrAn2LQptsPBgVKw5RMfUJCWH048z81jQ0+6wPUCxVYBimkSmGmef+CUC7WhCMEVxVEJKIO5yoMPPmhbfn5j/oESm0JJf7tF3//mqmKcBBbTMvCH4yqpS+IN9t6+oiTAZw8/HhPDcAp3+0Uti/fHDRmu90pdXozLwGJyBH190rX29s2szKKBSPI9AbeAffbZZ0UmJrfkyfctPxZxAeSxaP4CLTqxbDE6gorJFfzpaYka2LkryIZxiSpBxqpVq6wvwW/0xDJBFk4pNpJiQT6JfF584QXNPrlsMbqCi2kz6H9n11T/th1iVgFIADpx4kQtWbIkJgT5RF44d9q2bRvTLWP0ffaZZ5RxRoVi3Awqpu3gnRfWVdfa9ew9f7FKEINHj1tBDxQBXJhEvrR+3LixIp9EXlPGp2jFuTWLcTu4mAJC9l7dRH3LVNL2GI/ZtCr2DbgYOlYJ/QgspXLFUldiILrf3VxfXdmoGANCijEkbP551TXnySdjEgwCMQgVgPX5Rx99FH4k6kRvwtyCYE5fTlETeWz+5BP1uriyMos1JKwYg0J/qNxcHa+rpR8iwBYlsVk0btw4/fjjj3aZxt3AsUq+AtCrpKam2itli5r27tmj4ckPaPkVtxdzUGgxhoVn1U7SsxfU0GMPjyiaQ8W0enbfiNdn27VFixZR7erlldCrc+fOdhePCuC/IRCNvrYHMfr+d/lyDbqosvbW6lTMYeHFfDCEucDwM8tqflq69YypkKACKFvIjz76qPXQcZEjcX+xngSyumCrF18AcQlcQV/YCuCHqA3r1qvdFVX0TYW7SsDBkBJwNGzXGTWVfOpFWjTvaVsJCgssoLI+HzZsmA3u4CrXwuaRXyIvInyIRSB/hpgDbV2Hk2/5H2/YoHZXVtHmM6qVkKNhJeBwKDXz52MrKvn0Mlo8b36hKwHPMgQQbNGwYUM7DyjM+wVJVLKxY8eqefPmUfkCeP/j9evVtkJVbT72SmXRGkvE4dAScDxcF9e3M9RdJ1ZR8u8u1txZTxXY22ZblhHCuSFn06ZNBXqvsIk8Ib53797ZZwMLWg7Prf5wtWv5J1R0s3FsLhHHw0vABRG2WzrbLHV+V1M/n5iopJPO0YB+/fXll19aoPNKnhQIadOmjf0gREFJiSaRN70Lc4GHH37YHiXPryLw95/M82lz09Tkr5dp64nXKMvYaG0tMRdElIArYrLMTDfzgnraefaNevOkCppwzLkq/Yez1MK0aI5r8w0fJl8ebCZ4bPo8+eST1j1L1/zdd99l9wbxTOTPcINXkLIJLiVMjZVBUD/iFpks4pQq/Yc/6tFjztG2U65VJuchjK0l54oYLgtCiumSqB/6T9Cz1e9S17KJ6nJ3M00aO05LFi6ya3q+BcBse/DgwbaFAybCRx+6detmI24JIc+vFcYr2db900966aWX7A6h180L0c1MRlk9DBo0SLOmz1C/TvepU8UamnRRVX12e2dlcXVrcV4SNZlLoorpmri9z7+hlwaNUts6t+vvU6daNyvOEchE/Bc5aGm0KATA6YKDra24EzqgS1A/egj+/91337Wh4P5LJMj3O3fqXy+8oI6msqc0bKUfpy8o5mviiuGiyF1jn9LIFu01sG8/e7d+bl03/0+3Tmvni165PVMSk9dz06ZN9gsl7CIG9fa/M3dJMz0YDWBryqxivCgycmWoDtJVsbsb9dKAGrdpumn1e37Zky+p/MZYT8iX/zZPSU/ojM+A4BTc0fnaZ+x595131OTGOtrSeUjxXBW777LojLhfFp11SX2lXHqdxj32WIFdqTzDV70I+SrpPQF6bdy40eqa18cng8naYioBwaGtrqqqH2u0PUiXRWfsuyw6uwLE+br4rBMStfqs6mpTv1GhHSk8y6yaLvX5558vcOU5WAld6J3eMkSio2/5BdHRvzttylSlnlNJWcV3XXx8PxiRWaqSevz+IvsVjYIAE068w8FOHDGjR48udCWKV0IHJqUs+Zjwhcf8giSeZ0f07muv1zenV4vNbmwUH4yI6ydjvjm6ghrXrFVoH3ow8R7vc0aQz7z6eUG0+RUl+Za7adMme5iVW8iK4oLmvdRx47X4uEuKvuxD4AzuCvzJmDh/NOrfCRdpxENDijyR810rlzWyRYuPwEcCRwt+YZIvh+1mdiBp9XT9Ra2IvMuEsP/xf82BXVRS6I9GxfGzcZx8+cdR5ypt9pwigRRM5IN3kFs+WCXgmuUMPmvwWJURTOTJ3AN/BTEBlLlgwYKYRSCTB+Fxbc64IAd+UUlhPxtHiteHI6kAKUefowVPPx0TsIKJ/JgPcFtoUlKSDQjlUgb2EbzDyLfOgpbNc0GHFHcLcVEFcYG0eC6u8OFhsUrkhU+kxdllcuBXaIGrwn44kmSWCL9Tjk/Hdo7Jp2MXH3WhJplxMpag+eTJpYWyZOQOAPz0Te6+W0MHDtKc2bO1YvlyGzjC77Ti3IT1O7eRsCybl5Gh4cOGKalTknVGcasIv/keJtZ2kN86o1/Xk4o4BHie7KdjO7ut5cCnY8Oc50jx+nj0tqPKq+Vtd+gX023HGrxg8q2X07dMOpeXKqclx16sCcdfqOTTyqjbmWXU7qyL1easMkb410lb8/9dzG+DTi+jsSdepPnHllHT086xFcf3JPFM6D1j2nTN+s35ObArkPh1f1E+Hu1TPD4fn2mk+8nnWkBjEQWcXwJMvjrW54yLlcVYyH46W6pG76zfVFSWaSEMS/sJf8NrFrmyJcu8s+zkKzWgdx+7RxHvSssysHGl6voy4fIc2BVIfNRvUT8f75N5qbmmLlxtfccELnByBS8VEapRBI0C8qaEcmpc+Trn/49TJQDM7Z9tV9PEGtp23s0uDo6dtQN5NsOeM/POL3+urW6ly9njW+gbj0pAnvQwQwYM1Nyjz7c45dCtIAIncANHcAVncAeHKelVw/weMJmX8AtME1+34sgSjgQypnZFGaGCcdwJ0Ormuvb7OUVdOgWT7/o/2bRJLW+tpzevusPdwElXyD18XMWW3/Hq4PF2nuUd8+6OK+9Sx/KJ+mdkVzJW+pLIa5eZwD784GCNOO5c7QnrVBiBE7iBI7iCM7iDw5Rc1v0HSmbGeI7JoJ+mLVxv49Q4uHjb/fv2qv1BxdxaUz5CJVh11KVqc8GV+sf06frmq69t6wrO1KORr00+f586Te1q1tHqu7u5tS+7XzhBAAVvGPHwHMMGKNyjQeFv/MYzPMs7vGvy+K5RTz1QrY4G9OxlQ898RYhajK0Q//prr6td7bqae8yF+iWhQg6sDih+ow0ufMwFHMEVnMEdHBouw/wWKCk1rbGpPamasfgrmyFLCr5zC2DUuCgnhVSCHxOutLdkJZ1fQf3adtDkcRNsaPiip+fvLxyf9rLAy0Ir8+fN06SJqepzX1d1uu1OLWjTXT8PnaIsuj5O2XDUivAnWgOgcPwaj1jLZHfoMij8jd94hmd5h3fJY0CqMh98Qm91fUj9bmukLi1b65FRo6xfw+viJKJfUOeALQvnPa2ZU6ZpaO9+6lCphsb89nxtSyifA58CSXDSBxdwAjdwBFdwBneGwzCvBU6m5jAZbCW2DyfPX6/kSVLD3i64kC1LG7GSmHuXWkDZbWr+9qMu10rTKzx3zMV2xm7l+Mu05LQrtOSP12jJX6pqSZm/ackVt2hJlfpackMTLbntHj3XqKNWtu+vzweN1+4xM/fF1HO6hvg6ztlx2JITtwj/zd+4hYMI3KDwt7yeJy/yNHlnjp+jHQ9P1Qfdhumle7prSYP2VherE7qhI7qiM7pjA7YYm54x8vrRl2jDUeVsA4h6vEdsxFWi4wAu4ARu4Aiu4MxyV8jJXzgpZd5flJpOvMAQjZuz095YQWwZkysKpvbFYLcwh2CgjShiUhYxEt820TJ0dYQ3ETxJBC2BlNR6f6qGo1Wcr+OQJSdtOW7NmXt/UwlXsOQm/mYOnuUd3iUP8iJPf2LHlJVFmZSNDuiCTujmD9miM7rbiJ7oG0ieAuZgT1lwASdwA0dwBWeGuzCfUSeTaQPTSj6wNQyjr2riLi74442uJnoHRLTBIweScIxhMOScGHoOUgyf7gjiXB2HK4m25Zj1mk2OXH9TCffv5Cb+Zg6e5R3eJQ/yIk9/YoeyKDMYuh3LGL68JHjHD5iDPRzABZzADRwZrsL8FTmZGnWpyTjVrisZF5lk1WzvTpmy1o5FBFF+Qr7BGMNgyDkHKDhFw1Eq1r54vzhZixOEM/ZctEA3TtSt7+K5gSsovsvnGZ7lHd4lD/IiT/KmDMqizGDodixi+PKTcIQPmIM9HMAFnLg1fypchfmLSTKZdzQ1bKkmzdthQ4uZPFVtbZZMtbIdLUWKYctPyDMYYxgMOef0DBsfnKMj3BoXKCsAiMIbhp5ctUKXTTfJJI/r14LC3/iNZ3iWd3iXPMiLPMmbMiiLMoOh27GI4ctPvP0RR5XFHOzREy7gBG4MR2HeYpaUknamqV2txZbitEXb7YlWwGEJRe1HMWpnPABAyDe49KE8xkEIoEXQDXOSFocIZ+oZj/0Sj64SJwk3brHM4+69oPA3fuMZnvVLRfIgL/Ikb8qgLMr0HsbgkjietnubwRr9wB4O4AJO4MZwFOYtpsksK043crsmpo0XjgZaTZVW7sYJWgPuSFpCvOcEBRFbYSruazlMyiCOQxJcvBgU/ma78cjS1g5ncWrNBZXgmA+mYAvGYA3mYO+cPeMtJ4abMF9xSa4SpHc23c4Ke6adbpMukjGRmomi8Z4TFEQ8eNk9RmQOgbePWzeDwt9sL1Z5X4v274fzPRgSHvPBFGzBGKzBHOzhAC4OFvk+ma6mrKl9o8y4s8HuN3PMifESBf15tnjOCQoq4UrARYvoxpWrQeFv/FYSyEcoOzjmgynYgjFYgznYw4HhIsxP3JMeTzvFFH65kYGaumCpJsz91ipG7aSLOhhzgsJIdkWIVAbADUpwDC8p+gbHfDAFWzAGazAHezgwXIT5OWjJLD3+YJS41ypEraRrYnyiu2KmyoSJNWtwohQ29ldxEpzgghnYgSFYginY2pZvyb8X7MN8FEuKVIKBtktiXGJywgyVZQprVRwWRdg7OCIk7NsHM7ADQ7AEU7B13f7AEkO+T0apenY8YlLCzJTlCWtUHBUsq2K0d3DYivV0RlYpYAVmYAeGYAmmDttRYB3Gv9iTmxOkVbUzUpYlrE1xUOClwlUZ772DQ13AJOjbBzOws7eqsM5nqWewZfJdnGP+gdI+P0H6SOudwkWJn5rNCnascK7gTLFDQmSlcCQOCdldfsSZBSZgA0ZgBWZgB4bWyXMQ1/lFTRE/QWvrmsQ/zSYFYxjblexZs3NmYwwjjiOACAN0uEt2DN9NDgswARswAiswAzuLocHyUCHfJ+s2Zu+AzQl2qNimxCgCFohayY4xrLVvNzEM0uEq2IrN2O5j+MAEbMAIrNyuXqrFMN7u3XimyC5iA7FHTaCCDy8LxhgSxlxS1t/xFm8nNgdj+HwYlwvmGGIxi9euXnGkSFDJiOzwMkKuiFwlfJktVQ4ycJqFta+P4M12ywJaLmCWVPFuXO9+9pHG2IaN2IrN2A4GYOHDuOzlDen7Lm44XJKNLCJEiTg1F6zowpbZY2fbFS8XR5nYauVQI7twgEVkjZ8o2taTC+AlRYJ38qAzumODjWS6w9mGjdiKzdgOBmABJmBjMYphJE9JSkrJ+L0NNLWRqmnTbMw6Ex2CLgi4YAzkMCMnWpkUcbadCw5oQdkbSyV4mPDkoys6ozs2YAs2YRs2Yis2u0ne6kj4fT+HTRFj+A6FZEPO7bmD9Obi1ApHlzi/hpuTk6ysfwnJZo+epRHdZ0nYXcxPwrt36Izu2IAt2IRt7qDm2shxrWSLgcUiytDtQz1ln0V0B1JX2GPMnGUnRJvJEV0m99sQfcNNV36uwP69/9YREyo2TGh1PjKHLni/SlOAISS4/x4kk7x8JBJlUBZlUjY6oIsf29ERXdEZ3bEBW7AJ27DRHdQs+Fm9wz1FKkEze3yZM+xcZEBL4UoT7rUBQG64wifOXXdE4eIsoXXhOOESZG7CxoPGtilOFdbYfCIFwiDPV4a8KoEn35POO7xLHuRFnuRNGZRFmZSNDuiCTuiGjuiKzuiODa7Vf+fO52fgym32K/mhZEApL3s/ARcYpI+0V5lwnw2XGnGzFSAyYaIb5bZLrjzl3lsuP6alcfcud+Ezu4YgWiNuVcjzwZrBSpCjAoTI5x3eJQ/yIk/ypgzKokzKRgd0QSd0Q0d0RWd0d3fyzHI2GducjeXD9v+aIsneVMJ1Ne7OoqvF7WUT05PkDqe8aG+55KpTfOT+lnOWUtyBz4cQCJrgeBeTL7+SoKsO9gR5VYBgy+cdP4MnL/Ikb8qgLMr0t26jCzqhm7uEkUMZSU53a8Nl7gqePG7m+DUdOJkZ8o1yt1vOtvfcMp76W87pbvkAAl/BoCvmezhspRJEgbeNcZoPJdoAlUr5VIBI9A3P8g7vkgd5kSd5UwZlUaa/ddtev2J0ctev9lLwAsZfU2zSrxUgPun/A4NP9ZSEfLTZAAAAAElFTkSuQmCC
// @license             MIT
// @run-at              document-start
// @grant               none
// @downloadURL none
// ==/UserScript==

(function () {
  "use strict";

  // 翻訳オブジェクト
  const TRANSLATIONS = {
    en: { volumeChanged: "Volume" },
    ja: { volumeChanged: "音量" },
    "zh-CN": { volumeChanged: "音量" },
    ko: { volumeChanged: "볼륨" },
    ru: { volumeChanged: "Громкость" },
    de: { volumeChanged: "Lautstärke" },
  };

  const lang =
    (navigator.language || navigator.userLanguage).split("-")[0] || "en";

  // 音量変更のキーボードショートカット
  function setupKeyboardShortcuts() {
    document.addEventListener("keydown", handleVolumeChange);
  }

  // キーボードイベントを処理
  function handleVolumeChange(event) {
    const volumeSlider = document.querySelector(
      'tp-yt-paper-slider[id="volume-slider"]'
    );
    if (!volumeSlider) return;

    const isVolumeUp = event.key === "ArrowUp";
    const isVolumeDown = event.key === "ArrowDown";

    if (!(isVolumeUp || isVolumeDown)) return;

    event.preventDefault();

    const currentVolume = volumeSlider.value;
    let newVolume = calculateNewVolume(currentVolume, isVolumeUp, event);

    if (newVolume !== null) {
      updateVolume(volumeSlider, newVolume);
    }
  }

  // キーボードショートカットの設定
  function calculateNewVolume(currentVolume, isVolumeUp, event) {
    if (event.altKey && !event.ctrlKey && !event.shiftKey) {
      // Alt + ↑/↓: 音量を1%上げる/下げる
      return isVolumeUp
        ? Math.min(100, currentVolume + 1)
        : Math.max(0, currentVolume - 1);
    } else if (event.ctrlKey && event.altKey && !event.shiftKey) {
      // Ctrl + Alt + ↑/↓: 音量を5%上げる/下げる
      return isVolumeUp
        ? Math.min(100, currentVolume + 5)
        : Math.max(0, currentVolume - 5);
    } else if (event.ctrlKey && event.shiftKey && event.altKey) {
      // Ctrl + Shift + Alt + ↑/↓: 0% / 50% / 100% 変更
      return isVolumeUp
        ? currentVolume < 50
          ? 50
          : 100
        : currentVolume > 50
          ? 50
          : 0;
    }
    return null;
  }

  // 音量を更新し、通知を表示
  function updateVolume(volumeSlider, newVolume) {
    volumeSlider.value = newVolume;
    volumeSlider.dispatchEvent(new Event("change"));
    updateVolumeNotification(newVolume);
  }

  // 音量変更通知を更新
  function updateVolumeNotification(volume) {
    let notification = document.getElementById("ytmusic-volume-notification");

    if (!notification) {
      notification = createNotificationElement();
    }

    notification.textContent = `${TRANSLATIONS[lang].volumeChanged}: ${volume}%`;
    notification.style.display = "block";

    // 既存のタイムアウトをクリアし、新しいタイムアウトを設定
    clearTimeout(notification.hideTimeout);
    notification.hideTimeout = setTimeout(() => {
      notification.style.display = "none";
    }, 2000);
  }

  // 通知を作成
  function createNotificationElement() {
    const notification = document.createElement("div");
    notification.id = "ytmusic-volume-notification";
    notification.style.cssText = `
            position: fixed; bottom: 20px; right: 20px; background-color: rgba(0, 0, 0, 0.7);
            color: white; padding: 10px; border-radius: 5px; z-index: 9999; display: none;
        `;
    document.body.appendChild(notification);
    return notification;
  }

  setupKeyboardShortcuts();
})();