.videos {
  position: relative; /* .video と .tool の親要素に相対位置を設定 */
  z-index: 1;
  max-width: 1280px;
  max-height: 720px;
}

.video {
  border-radius: 5px;
  width: 100%;
  height: 100%;
}

#tool {
  border-radius: 5px;
  display: none;
  background-color: rgba(255, 255, 0, .0);
  width: 100%;
  position: absolute; /* .video タグに対して絶対位置を設定 */
  top: 0;
  left: 0;
  background: linear-gradient(to bottom,rgba(255, 255, 255, .0),rgba(255, 255, 255, .0) 70%,rgba(0, 0, 0, .75)); 
}
.tips {
  border-radius: 5px;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
}
.tips div {
  width: 100%;
}
.seekbar{
width: 100%;
margin-left: auto;
display: block;
}
.block{
display: block;
line-height:0;
}
#block{
display: block;
line-height:0;
}
.seekbar input{
    text-align: center;
    margin-left: 1%;
    height: 10px;
    width: 98%;
}
.data{
  color:white;
  margin-left: 10px;
  display: flex;
}
#volume{
width:75px;
height: 7px;
}
.data button{
  margin-left: auto;
  margin-right: 20px;
  background: transparent;
  border:none
}
iframe{
    aspect-ratio: 16 / 9;
    border-radius: 5px;
}
main{
    display: flex;
    justify-content: center;
}
article{
  width: 66%;
  max-width: 1280px;
}
aside{
  width: 100%;
text-align: center;
max-width: 400px;
}
.side{
width: 70%;
}
.overview{
    background-color:  #eee;
    border-radius:10px 10px 10px 10px;
}
.overview p {
    padding-top: 5px;
    padding-left: 10px;
}
.modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: white;
    padding: 20px;
    border: 1px solid #333;
    border-radius: 5px;
    z-index: 1000;
    width: 400px;
    height: 300px;
}
.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}
.up{
    display: flex;
}
.home{
    width: 90%;
}
.popup{
    width: 10%;
}
.action{
display: flex;
}
.share{
padding-top: 20px;
margin-left: auto;
margin-right: 20px;
}