html,
body {
    font-family: Helvetica, Arial, sans-serif;
    margin: 0;
    background-color: #f0f0f0;
    box-sizing: border-box;
}

h1 {
    margin: 0 0 20px;
}
a {
    color: dodgerblue;
    text-decoration: none;
}
/* Accordion */
.container {
    width: 90%;
    margin: 0 auto;
    text-align: center;
}
section:not(:last-of-type) {
    border-bottom: 5px solid dodgerblue;
    padding: 30px;
}
section:last-of-type {
    border: none;
    padding: 30px 0 0;
}

.panel-question {
    margin-bottom: 20px;
    background-color: #fff;
}

.panel-heading {
    font-weight: bold;
    padding: 5px;
    background-color: #333;
    color: #fff;
    cursor: pointer;
}

.panel-body {
    padding: 15px;
}

#btn-collapse {
    margin-bottom: 10px;
    background-color: #999;
    border: none;
    color: #fff;
    cursor: pointer;
    padding: 5px;
    position: absolute;
    right: 8rem;
}

/* End Accodion */

/* dragAndDrop */
.fill {
    background-image: url('https://source.unsplash.com/random/150x150');
    position: relative;
    height: 150px;
    width: 150px;
    top: 5px;
    left: 5px;
    cursor: pointer;
}

.hold {
    border: solid 5px #ccc;
}

.empty {
    display: inline-block;
    height: 160px;
    width: 160px;
    margin: 10px;
    border: solid 3px salmon;
    background: white;
}

.hovered {
    background: #f4f4f4;
    border-style: dashed;
}
/* End dragAndDrop */

/* Full-Screen-Hover */
.full_screen {
    /* max-width: 1500px; */
    margin: 0 auto;
    /* width: 100%; */
}

.full_screen a {
    border-bottom: 2px dashed var(--red);
    position: relative;
}

.full_screen a:hover {
    z-index: 2;
    border-bottom-color: transparent;
    color: var(--red);
}

.full_screen a::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    min-height: 30px;
    transform: translate(-50%, -50%) scaleX(0);
    padding: 10px;
    z-index: -1;
    transform-origin: center;
    background: var(--white);
    transition: all 0.3s ease-out;
}

.full_screen a:hover {
    z-index: 2;
    border-bottom-color: transparent;
    color: var(--red);
}

.full_screen a:hover:before {
    transform: translate(-50%, -50%) scaleX(1);
}

.bg {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    display: none;
    opacity: 0;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    /* transition: all 0.5s ease-out; */
    animation: bgshow 0.5s ease-in-out;
}

.bg.bg-show {
    display: block;
    opacity: 1;
    z-index: 1;
    transition: all 0.5s ease-out;
}
/* .full_screen a:hover:before {
    transform: translate(-50%, -50%) scaleX(1);
} */

@keyframes bgshow {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}