* {
  box-sizing: border-box;
}

@media (min-width: 600px) {
}
.tabs {
  display: flex;
  flex-wrap: wrap;
  max-width: 700px;
  background: #e5e5e5;
  box-shadow: 10px 48px 80px -32px rgba(0,0,0,0.3);
}
.input {
  position: absolute;
  opacity: 0;
}
.label {
  width: 100%;
  padding: 20px 30px;
  background: #e5e5e5;
  cursor: pointer;
  font-weight: bold;
  font-size: 18px;
  color: #7f7f7f;
  transition: background 0.1s, color 0.1s;
}
.label:hover {
  background: #d8d8d8;
}
.label:active {
  background: #ccc;
}
.input:focus + .label {
  z-index: 1;
}
.input:checked + .label {
  background: #fff;
  color: #000;
}
@media (min-width: 600px) {
  .label {
    width: auto;
  }
}
.panel {
  display: none;
  padding: 20px 30px;
  background: #fff;
}
@media (min-width: 600px) {
  .panel {
    order: 99;
  }
}
.input:checked + .label + .panel {
  display: block;
}

.hover-underline {
  font-size: 2rem;
  color: #ffffff;
  position: relative;
  display: inline-block;
}

.hover-underline::after,
.hover-underline::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 2px;
  background: linear-gradient(to right, #ff0000, #00ffff);
  bottom: -5px;
  left: 0;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s ease-out;
}

.hover-underline::before {
  top: -5px;
  transform-origin: left;
}

.hover-underline:hover::after,
.hover-underline:hover::before {
  transform: scaleX(1);
}

/**********************************/
/********** Effect #4 CSS *********/
/**********************************/
.effect-4 {
    position: relative;
    margin-bottom: 30px;
    overflow: hidden;
}

.effect-4 .effect-img {
    font-size: 0;
    overflow: hidden;
}

.effect-4 .effect-img img {
    width: 100%;
    height: auto;
    transition: all .3s;
}

.effect-4:hover .effect-img img {
    transform: scale(1.2);
}

.effect-4 .effect-text {
    position: absolute;
    top: 15px;
    right: 15px;
    bottom: 15px;
    left: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: rgba(0, 0, 0, .5);
    overflow: hidden;
    transition: all .3s ease-in;
    opacity: 0;
}

.effect-4 .effect-text .effect-text-inner {
    position: absolute;
    padding: 15px;
    z-index: 1;
}

.effect-4 .effect-text:before,
.effect-4 .effect-text:after {
    position: absolute;
    display: block;
    width: 100%;
    height: 0;
    content: '';
}

.effect-4 .effect-text:before {
    border-top: 3px solid #ffffff;
    border-right: 3px solid #ffffff;
    left: -100%;
    top: 0;
}

.effect-4 .effect-text:after {
    border-bottom: 3px solid #ffffff;
    border-left: 3px solid #ffffff;
    left: 100%;
    bottom: 0;
}

@-webkit-keyframes left-up {
    0% {
        left: 100%;
        height: 0;
    }
    50% {
        left: 0;
        height: 0;
    }
    100% {
        height: 100%;
        left: 0;
    }
}

@-webkit-keyframes right-dn {
    0% {
        left: -100%;
        height: 0;
    }
    50% {
        left: 0;
        height: 0;
    }
    100% {
        height: 100%;
        left: 0;
    }
}

.effect-4:hover .effect-text{
    opacity: 1;
}

.effect-4:hover .effect-text:after,
.effect-4:hover .effect-text:before {
    animation-delay: .1s;
    animation-duration: .5s;
    animation-iteration-count: 1;
    animation-timing-function: ease-in-out;
    animation-fill-mode: forwards
}

.effect-4:hover .effect-text:after {
    animation-name: left-up;
}

.effect-4:hover .effect-text:before {
    animation-name: right-dn;
}

.effect-4 .effect-text h2 {
    height: 45px;
    color: #ffffff;
    font-size: 25px;
    margin: 0;
}

.effect-4 .effect-text p {
    color: #ffffff;
    font-size: 16px;
    margin-bottom: 20px;
}


.effect-4 .effect-btn .btn {
    display: inline-block;
    height: 35px;
    padding: 7px 15px;
    color: #333333;
    background: #ffffff;
}