Fényből rajzolódó keret

<div class="we-hover-frame">

    <div class="we-frame-line we-frame-top"></div>
    <div class="we-frame-line we-frame-right"></div>
    <div class="we-frame-line we-frame-bottom"></div>
    <div class="we-frame-line we-frame-left"></div>

    <div class="we-frame-content">

        <span>WebElements</span>

        <strong>
            Fényből rajzolva
        </strong>

        <small>
            A keret hoverre születik meg
        </small>

    </div>

</div>

.we-hover-frame {
    width: 100%;
    max-width: 440px;
    height: 190px;
    margin: 60px auto;

    position: relative;
    overflow: hidden;

    display: flex;
    align-items: center;

    padding: 40px;
    box-sizing: border-box;

    background: #0a1014;

    border: 1px solid rgba(142,232,212,.12);
    border-radius: 18px;

    color: #f2f4f0;
    font-family: Arial, sans-serif;

    transition:
        transform .45s cubic-bezier(.22,1,.36,1),
        box-shadow .45s ease;
}


/* ALAP KERET ELTŰNIK */

.we-frame-line {
    position: absolute;

    z-index: 3;

    background: #8ee8d4;

    box-shadow:
        0 0 8px rgba(142,232,212,1),
        0 0 22px rgba(142,232,212,.65);

    opacity: 0;
}


/* FELSŐ */

.we-frame-top {
    top: 0;
    left: 0;

    width: 0;
    height: 2px;
}


/* JOBB */

.we-frame-right {
    top: 0;
    right: 0;

    width: 2px;
    height: 0;
}


/* ALSÓ */

.we-frame-bottom {
    bottom: 0;
    right: 0;

    width: 0;
    height: 2px;
}


/* BAL */

.we-frame-left {
    bottom: 0;
    left: 0;

    width: 2px;
    height: 0;
}


/* TARTALOM */

.we-frame-content {
    position: relative;
    z-index: 2;

    transition:
        transform .5s cubic-bezier(.22,1,.36,1);
}

.we-frame-content span {
    display: block;

    margin-bottom: 12px;

    font-size: 11px;
    letter-spacing: 4px;
    text-transform: uppercase;

    color: #8ee8d4;
}

.we-frame-content strong {
    display: block;

    font-size: 27px;
    font-weight: 500;
}

.we-frame-content small {
    display: block;

    margin-top: 10px;

    font-size: 13px;
    color: rgba(242,244,240,.62);
}


/* HOVER */

.we-hover-frame:hover {

    transform: translateY(-6px);

    box-shadow:
        0 24px 55px rgba(0,0,0,.5),
        0 0 30px rgba(142,232,212,.10);
}


/* KERET KIRAJZOLÁSA */

.we-hover-frame:hover .we-frame-top {
    animation:
        frameTop
        .35s
        ease-out
        forwards;
}

.we-hover-frame:hover .we-frame-right {
    animation:
        frameRight
        .35s
        ease-out
        .35s
        forwards;
}

.we-hover-frame:hover .we-frame-bottom {
    animation:
        frameBottom
        .35s
        ease-out
        .70s
        forwards;
}

.we-hover-frame:hover .we-frame-left {
    animation:
        frameLeft
        .35s
        ease-out
        1.05s
        forwards;
}


.we-hover-frame:hover .we-frame-content {
    transform:
        translateY(-3px)
        scale(1.015);
}


/* ANIMÁCIÓK */

@keyframes frameTop {

    0% {
        width: 0;
        opacity: 1;
    }

    100% {
        width: 100%;
        opacity: 1;
    }

}


@keyframes frameRight {

    0% {
        height: 0;
        opacity: 1;
    }

    100% {
        height: 100%;
        opacity: 1;
    }

}


@keyframes frameBottom {

    0% {
        width: 0;
        opacity: 1;
    }

    100% {
        width: 100%;
        opacity: 1;
    }

}


@keyframes frameLeft {

    0% {
        height: 0;
        opacity: 1;
    }

    100% {
        height: 100%;
        opacity: 1;
    }

}

Ehhez az animációhoz nincs külön JavaScript.

További animációk ebből a kategóriából