@import url(https://fonts.googleapis.com/css?family=Signika:700,300,600);

/* html, body { height: 100%; }
body { display: flex; justify-content: center; align-items: center; margin:20px 0; text-align:center; background:beige; overflow:hidden; }
 */
.letras {
 font-size:5em;
 font:bold 7.5vw/1.6 'Signika', sans-serif;
 user-select:none;
}

.letras .span1 { display:inline-block; animation:float .2s ease-in-out infinite; }
 @keyframes float {
  0%,100%{ transform:none; }
  33%{ transform:translateY(-1px) rotate(-2deg); }
  66%{ transform:translateY(1px) rotate(2deg); }
}
body:hover .span1 { animation:bounce .6s; }
@keyframes bounce {
  0%,100%{ transform:translate(0); }
  25%{ transform:rotateX(20deg) translateY(2px) rotate(-3deg); }
  50%{ transform:translateY(-20px) rotate(3deg) scale(1.1);  }
}

.span1:nth-child(4n) { color:hsl(50, 75%, 55%); text-shadow:1px 1px hsl(50, 75%, 45%), 2px 2px hsl(50, 45%, 45%), 3px 3px hsl(50, 45%, 45%), 4px 4px hsl(50, 75%, 45%); }
.span1:nth-child(4n-1) { color:hsl(135, 35%, 55%); text-shadow:1px 1px hsl(135, 35%, 45%), 2px 2px hsl(135, 35%, 45%), 3px 3px hsl(135, 35%, 45%), 4px 4px hsl(135, 35%, 45%); }
.span1:nth-child(4n-2) { color:hsl(209deg 46% 49%); text-shadow:1px 1px hsl(209deg 46% 49%), 2px 2px hsl(209deg 46% 49%), 3px 3px hsl(209deg 46% 49%), 4px 4px hsl(224deg 41% 38%); }
.span1:nth-child(4n-3) { color:hsl(30, 65%, 60%); text-shadow:1px 1px hsl(30, 45%, 50%), 2px 2px hsl(30, 45%, 50%), 3px 3px hsl(30, 45%, 50%), 4px 4px hsl(30, 45%, 50%); }

.letras .span1:nth-child(2){ animation-delay:.05s; }
.letras .span1:nth-child(3){ animation-delay:.1s; }
.letras .span1:nth-child(4){ animation-delay:.15s; }
.letras .span1:nth-child(5){ animation-delay:.2s; }
.letras .span1:nth-child(6){ animation-delay:.25s; }
.letras .span1:nth-child(7){ animation-delay:.3s; }
.letras .span1:nth-child(8){ animation-delay:.35s; }
.letras .span1:nth-child(9){ animation-delay:.4s; }
.letras .span1:nth-child(10){ animation-delay:.45s; }
.letras .span1:nth-child(11){ animation-delay:.5s; }
.letras .span1:nth-child(12){ animation-delay:.55s; }
.letras .span1:nth-child(13){ animation-delay:.6s; }
.letras .span1:nth-child(14){ animation-delay:.65s; }