@import url(https://fonts.googleapis.com/css?family=Lato);
body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  font-family: Lato, sans-serif;
  background: #eceffc;
}

.upload {
  --btn-color: #3bafda;
  --progress-color: #2d334c;
  --ease-in-out-quartic: cubic-bezier(0.77, 0, 0.175, 1);
  position: relative;
  display: flex;
  font-size: 24px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 1.7px 1.4px rgba(0, 0, 0, 0.02), 0 4px 3.3px rgba(0, 0, 0, 0.028), 0 7.5px 6.3px rgba(0, 0, 0, 0.035), 0 13.4px 11.2px rgba(0, 0, 0, 0.042), 0 25.1px 20.9px rgba(0, 0, 0, 0.05), 0 60px 50px rgba(0, 0, 0, 0.07);
  overflow: hidden;
}
.upload__info {
  display: flex;
  align-items: center;
  padding: 25px 30px;
  margin-right: 60px;
}
.upload__filename {
  padding-left: 12px;
}
.upload__button {
  position: relative;
  padding: 20px 20px;
  font-size: 24px;
  color: white;
  background: none;
  border: none;
  border-radius: inherit;
  outline: none;
  cursor: pointer;
  transform: scale(0.9);
}
.upload__button::before {
  position: absolute;
  content: "";
  z-index: -1;
  top: 0;
  left: 2px;
  width: 100%;
  height: 100%;
  background-color: var(--btn-color);
  border-radius: inherit;
  transform-origin: right;
}
.upload__hint {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  color: white;
  transform: translateY(100%);
}
.upload__progress {
  position: absolute;
  content: "";
  top: 90%;
  left: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  color: white;
  background: var(--progress-color);
  transform: scaleX(0);
  transform-origin: left;
}
.upload__progress .check {
  stroke-dasharray: 20px;
  stroke-dashoffset: 20px;
  margin-right: 10px;
}
.upload.uploading .upload__button {
  animation: expand 0.3s forwards;
}
.upload.uploading .upload__button::before {
  animation: fill-left 1.2s 0.4s var(--ease-in-out-quartic) forwards;
}
.upload.uploading .upload__info > *,
.upload.uploading .upload__button__text {
  animation: fade-up-out 0.4s 0.4s forwards;
}
.upload.uploading .upload__hint {
  animation: fade-up-in 0.4s 0.8s forwards;
}
.upload.uploading .upload__progress {
  animation: fill-right 2s 1s var(--ease-in-out-quartic) forwards;
}
.upload.uploaded .upload__progress {
  animation: slide-up 1s var(--ease-in-out-quartic) forwards;
}
.upload.uploaded .upload__progress .check {
  animation: stroke-in 0.6s 0.4s var(--ease-in-out-quartic) forwards;
}
.upload.uploaded-after .upload__info {
  animation: slide-down-info 1s var(--ease-in-out-quartic) forwards;
}
.upload.uploaded-after .upload__button {
  animation: slide-down-button 1s var(--ease-in-out-quartic) forwards;
}
.upload.uploaded-after .upload__progress {
  animation: slide-down-progress 1s var(--ease-in-out-quartic) forwards;
}

@keyframes expand {
  to {
    transform: scale(1);
  }
}
@keyframes fill-left {
  to {
    transform: scale(4, 1.2);
  }
}
@keyframes fade-up-out {
  to {
    opacity: 0;
    transform: translateY(-40%);
  }
}
@keyframes fade-up-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes fill-right {
  to {
    transform: scaleX(1);
  }
}
@keyframes slide-up {
  from {
    transform: scaleX(1) translateY(0);
  }
  to {
    transform: scaleX(1) translateY(-90%);
  }
}
@keyframes stroke-in {
  to {
    stroke-dashoffset: 0;
  }
}
@keyframes slide-down-info {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}
@keyframes slide-down-button {
  from {
    transform: scale(0.9) translateY(-100%);
  }
  to {
    transform: scale(0.9) translateY(0);
  }
}
@keyframes slide-down-progress {
  from {
    transform: scaleX(1) translateY(-90%);
  }
  to {
    transform: scaleX(1) translateY(10%);
  }
}