HTMLify

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "sans";
}

@font-face {
  font-family: "sans";
  src: url(font/sans.ttf);
}

body {
  background-color: #19172e;
}

.container {
  width: 40%;
  height: 500px;
  margin: 3rem auto;
  text-align: center;
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 15px 25px rgba(0, 0, 0, 0.1);
  border-radius: 20px;
  backdrop-filter: blur(20px);
}

/* Style the header */
.header {
  padding: 10px;
  color: white;
  text-align: center;
}

/* Clear floats after the header */
.header:after {
  content: "";
  display: table;
  clear: both;
}

h2 {
  padding: 0.5rem;
}

input {
  border: solid 1px #19172e;
  border-radius: 3px;
  width: 75%;
  padding: 10px;
  float: left;
  font-size: 16px;
}

.addBtn,.editBtn {
  padding: 10px;
  width: 25%;
  background: #ffd662ff;
  color: black;
  float: right;
  text-align: center;
  font-size: 16px;
  cursor: pointer;
  border-radius: 3px;
}

.addBtn:hover {
  background-color: #1e8e3e;
}

ul li {
  margin: 10px;
  list-style-type: none;
  cursor: pointer;
  position: relative;
  padding: 12px 8px 12px 40px;
  background: #fff;
  font-size: 18px;
  border-radius: 3px;
}

ul li.checked {
  background-color: #1e8e3e;
  color: #fff;
  text-decoration: line-through;
}

ul li.checked::before {
  content: "";
  position: absolute;
  border: solid #fff;
  border-width: 0 3px 3px 0;
  left: 16px;
  transform: rotate(45deg);
  height: 15px;
  width: 7px;
}

.close {
  position: absolute;
  right: 0;
  top: 0;
  padding: 12px 16px 12px 16px;
  background-color: #f44336;
  border-radius: 0 3px 3px 0;
  color: white;
}

.edit {
  position: absolute;
  right: 50px;
  top: 0;
  padding: 10px 16px 12px 16px;
  background-color: green;
  color: white;
}

footer {
  color: white;
  position: absolute;
  text-align: center;
  font-size: 1rem;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 5px;
  line-height: 3vh;
}

footer a:visited {
  color: inherit;
}

@media (max-width: 600px) {
  .container {
    width: auto;
  }
}

@media(max-width:400px){
  .val{
    text-align: left;
  }
}
#myUL {
  /* increases these chnages in it.. */
    max-height: 300px; 
    overflow-y: auto;
  }