.gradation-button:hover{background:linear-gradient(45deg,#e93c3d,#f7b80e);background-size:150% 150%;animation:roll 3s linear infinite}@keyframes roll{0%{background-position:0 0}25%{background-position:100% 0}50%{background-position:100% 100%}75%{background-position:0 100%}to{background-position:0 0}}.gradation{background:linear-gradient(180deg,#e93c3d,#f7b80e);background-size:200% 200%;animation:gradationAnim 10s ease infinite}@keyframes gradationAnim{0%{background-position:50% 100%}50%{background-position:50% 0}to{background-position:50% 100%}}html{background-color:#000}