/* (A) WRAPPER */
#up-wrap, #up-wrap * {
  font-family: Arial, Helvetica, sans-serif;
  box-sizing: border-box;
}
#up-wrap {
  max-width: 400px;
  padding: 20px;
  margin: 20px;
  background: #f1f1f1;
}
#up-wrap h2 { margin: 0 0 15px 0; }

/* (B) PROGRESS BAR */
#up-progress, #up-bar, #up-percent { height: 11px; }
#up-progress {
  position: relative;
  background: #fff;
}
#up-bar {
  background: #d3e3ff;
  width: 0;
  transition: width 0.5s;
}
#up-percent {
  position: absolute; top: 0; left: 0;
  width: 100%; display: flex;
  align-items: center; justify-content: center;
}

/* (C) FILE PICKER */
#up-file { display: none; }
#up-label {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  color: #fff;
  border: 1px solid #dfdfdf;
  background: #296cd0;
  cursor: pointer;
}
#up-file:disabled ~ #up-label { background: #b1b1b1; }

/* (X) DOES NOT MATTER */
body { padding: 0; margin: 0; }