index.css

body{
  margin: 10px !important;
}

footer {
  margin-left: 10px !important;
}

header {
  width: 100%;
  height: 15vw;
  border-radius: 7px;
}

h1 {
  position: relative;
  margin: auto;
}

.main {
  padding-top: 10px;
}

p {
  margin-top: 30px;
}
.cntr {
  display: table;
  width: 100%;
  height: 100%;
  margin: auto;
}

.search-box {
  border: solid 2px black;
  display: inline-block;
  position: relative;
  border-radius: 50px;
}
.search-box input[type=text] {
  font-size: 14px;
  /* font-weight: bold; */
  width: 50px;
  height: 50px;
  padding: 5px 40px 5px 10px;
  border: none;
  box-sizing: border-box;
  border-radius: 40px;
  transition: width 800ms cubic-bezier(0.68, -0.55, 0.27, 1.55) 150ms;
}
.search-box input[type=text]:focus {
  outline: none;
}
.search-box input[type=text]:focus, .search-box input[type=text]:not(:placeholder-shown) {
  width: 275px;
  transition: width 800ms cubic-bezier(0.68, -0.55, 0.27, 1.55);
}
.search-box input[type=text]:focus + button[type=reset], .search-box input[type=text]:not(:placeholder-shown) + button[type=reset] {
  bottom: 13px;
  right: 10px;
  transition: bottom 150ms ease-out 800ms, right 150ms ease-out 800ms;
}
.search-box input[type=text]:focus + button[type=reset]:after, .search-box input[type=text]:not(:placeholder-shown) + button[type=reset]:after {
  top: 0;
  right: 10px;
  opacity: 1;
  transition: top 150ms ease-out 950ms, right 150ms ease-out 950ms, opacity 150ms ease 950ms;
}
.search-box button[type=reset] {
  background-color: transparent;
  width: 25px;
  height: 25px;
  border: 0;
  padding: 0;
  outline: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  bottom: -13px;
  right: -15px;
  transition: bottom 150ms ease-out 150ms, right 150ms ease-out 150ms;
}
.search-box button[type=reset]:before, .search-box button[type=reset]:after {
  content: "";
  height: 25px;
  border-left: solid 5px black;
  position: absolute;
  transform: rotate(-45deg);
}
.search-box button[type=reset]:after {
  transform: rotate(45deg);
  opacity: 0;
  top: -20px;
  right: -10px;
  transition: top 150ms ease-out, right 150ms ease-out, opacity 150ms ease-out;
}