html,
body {
  margin: 0;
  display: flex;
  flex-direction: column;
}

img {
  max-width: 100%;
}

footer {
  position: relative;
}
.tab-btn0,
.tab-btn1,
.tab-btn2,
.tab-btn3,
.tab-btn4,
.tab-btn5,
.tab-btn6,
.tab-btn7,
.tab-btn8,
.tab-btn9,
.tab-btn10,
.tab-btn11 {
  position: absolute;
  width: 7%;
  height: 2vw;
  background-color: transparent;
  top: 4.5vw;
  cursor: pointer;
}
.tab-btn0{
  left: 10.5%;
}
.tab-btn1 {
  left: 21%;
}

.tab-btn2 {
  width: 5%;
  left: 30%;
}

.tab-btn3 {
  width: 5%;
  left: 37%;
}

.tab-btn4 {
  width: 6%;
  left: 45%;
}

.tab-btn5 {
  width: 6%;
  left: 54%;
}

.tab-btn6 {
  left: 34vw;
  top: 11vw;
}

.tab-btn7 {
  left: 34vw;
  top: 14vw;
}

.tab-btn8 {
  left: 34vw;
  top: 16.5vw;
}
.tab-btn9{
  left: 46vw;
  top: 11vw;
}
.tab-btn10{
  left: 46vw;
  top: 14vw;
}
.tab-btn11{
  left: 58vw;
  top: 11vw;
}
.bottom{
  color: #888;
  font-size: 22px;
  text-align: center;
  bottom: -40px;
  width: 82%;
  border-top: 1px solid #ccc;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  padding: 20px 0;
}
.bottom a{
  color: #888;
  text-decoration: none;
  margin-top: 5px;
  display: inline-block;
}