.hamburger {display: inline-block;cursor: pointer;transition-property: opacity,filter;transition-duration: .15s;transition-timing-function: linear;font: inherit;color: inherit;text-transform: none;background-color: transparent;border: 0;margin: 0;overflow: visible;}
a:hover .hamburger {opacity: .7;}
.hamburger-box {width: 20px;height: 16px;display: inline-block;position: relative;}
.hamburger-inner {display: block;top: 50%;margin-top: 2px;}
.hamburger-inner, .hamburger-inner::after, .hamburger-inner::before {width: 20px;height: 2px;background-color: #000;border-radius: 3px;position: absolute;transition-property: transform;transition-duration: .15s;transition-timing-function: ease;}
.hamburger-inner::after, .hamburger-inner::before {content: "";display: block;}
.hamburger-inner::before {top: -7px;}
.hamburger-inner::after {bottom: -7px;}