html {
  height: 100%;
  background: white;
  background: radial-gradient(circle, #fff 20%, #ccc);
  background-size: cover;
}

* {
  -webkit-user-select: none; 
  -moz-user-select: none;
  -ms-user-select: none;
  padding: 0;
  margin: 0;
  box-sizing: content-box;
}

@font-face {
  font-family: custom;
  src: url(fonts/Roadbrush.ttf);
}

h1 {
  font-family: custom;
  color: white;
  text-align: center;
  position: relative;
  margin: 0px;
  top: 50%;
  transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
}

.output {
  position: relative;
  width: calc(100% - 20px);
  height: 75px;
  background-color: #fffeec;
  border-radius: 5px;
  margin-left: auto;
  margin-bottom: 20px;
  margin-right: 20px;
  overflow: hidden;
}

.output h1 {
  font-family: custom;
  color: black;
  text-align: right;
  position: relative;
  margin: 0px;
  top: 50%;
  transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
  overflow: hidden;
  margin-left: 15px;
  margin-right: 15px;
}

.cal-body {
  width: 350px;
  background-color: #0cf;
  box-shadow: 0px 4px #009de4, 0px 10px 15px rgba(0, 0, 0, 0.2);
  border-radius: 20px;
  left: 0;
  right: 0;
  margin: 0 auto;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  -webkit-transform: translateY(-50%);
  padding: 20px;
  padding-right: 0px;
  padding-bottom: 0px;
}

.calc-btn {
  padding: 5px;
  height: 50px;
  width: 50px;
  border: 2px solid white;
  border-radius: 20px;
  display: inline-block;
  margin-right: 20px;
  margin-bottom: 20px;
  cursor: pointer;
  transition: all 300ms;
}

.calc-btn:hover {
  background-color: #0ebeff;
}

.btn-clear {
  background-color: #fb2a53;
}

.btn-clear:hover {
  background-color: #de0000;
}

.btn-wide {
  width: 140px;
}

.btn-hidden {
  border: none;
  visibility: hidden;
}

.btn-hidden:hover {
  background-color: #0cf;
}

.btn-high-top {
  position: absolute;
  margin-top: -84px;
  height: 134px;
}

.modal {
  display: none;
  position: absolute;
  z-index: 1;
  top: 10%;
  transform: translateY(-10%);
  -webkit-transform: translateY(-10%);
  overflow: hidden;
  width: 60%;
  left: 0;
  right: 0;
  margin: 0 auto;
}

.modal-content {
  background-color: #fb2a53;
  margin: auto;
  padding: 10px;
  border: 1px solid #888;
  width: 80%;
  font-family: custom;
}

.close {
  color: #aaaaaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: #000;
  text-decoration: none;
  cursor: pointer;
}