.neon{position:relative}
.neon::after{content:"";position:absolute;inset:-2px;border-radius:inherit;box-shadow:0 0 18px 2px #7b5cff55;opacity:.7;z-index:-1}
.neon.outline{border-color:#00e5ff;box-shadow:0 0 12px #00e5ff66, inset 0 0 8px #00e5ff33}
.glass{box-shadow:inset 0 0 0 1px #7b5cff22, 0 8px 24px #00000066}
.btn.neon:hover{box-shadow:0 0 18px #7b5cffcc, inset 0 0 12px #7b5cff66}