* {
    box-sizing: border-box;
    font-family: 'Nunito', sans-serif;
}

body {
    background: hsl(240, 4%, 11%);
    background-attachment: fixed;
    background-size: cover;
    color: #dfdfdf;
    margin: 0;
    padding: 0;
}

h1 {
    font-size: 60px;
}

h2 {
    font-size: 40px;
}

p {
    color: hsla(0, 0%, 87%, 0.755);
    text-align: justify;
}

.header {
    color: #dfdfdf;
    padding: 30px;
    text-align: center;
    background: url('DNAND.png') no-repeat center center;
    background-size: cover;
    border-bottom: 1px solid rgba(52, 58, 64, 0.8);
}

.container {
    display: grid;
    grid-template-columns: 3fr 0.75fr;
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.leftcolumn, .rightcolumn {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

img {
    width: 100%;
    height: auto;
}

.card {
    background-color: rgba(52, 58, 64, 0.8);
    padding: 20px;
    color: #dfdfdf;
    transition: transform 0.5s;
    border-radius: 5px;
}

.card img {
    opacity: 0.8;
    background-color: azure;
}

.card:hover {
    background-color: rgba(63, 71, 78, 0.8);
    transform: scale(1.01);
}

.card.active {
    height: auto;
}

.double_img {
    display: flex;
    justify-content: space-between;
    gap: 10px;
}

.double_img img {
    width: 50%;
    object-fit: cover;
}

.portfolioImg {
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s;
}

.portfolioImg:hover {
    transform: scale(1.05);
}

.footer {
    padding: 5px;
    text-align: center;
    margin-top: 20px;
    color: #dfdfdf;
    font-weight: normal;
    font-size: small;
}

.btn {
    margin-top: 5px;
    border-radius: 5px;
    border: none;
    padding: 20px;
    font-size: 20px;
    background-color: rgba(52, 58, 64, 0.8);
    color: #dfdfdf;
    transition: transform 0.5s;
}

.btn:hover {
    background-color: rgba(63, 71, 78, 0.8);
    transform: scale(1.01);
}

@media screen and (max-width: 800px) {
    .container {
        grid-template-columns: 1fr;
        padding: 20px;
    }
}

@media screen and (max-width: 1200px) {
    .container {
        grid-template-columns: 2fr 1fr;
    }
}

#topBtn {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 99;
    font-size: 18px;
    border: none;
    outline: none;
    background-color: rgba(52, 58, 64, 0.8);
    color: white;
    cursor: pointer;
    padding: 15px;
    border-radius: 50%;
    transition: transform 0.5s;
}

#topBtn:hover {
    background-color: rgba(63, 71, 78, 0.8);
    transform: scale(1.1);
}

.modal {
    display: none;
    position: fixed;
    z-index: 100;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0, 0, 0);
    background-color: rgba(0, 0, 0, 0.4);
    animation: fadeIn 0.6s;
}

.modal-content {
    background-color: #2d2d2d;
    margin: 15% auto;
    padding: 20px;
    width: 80%;
    border-radius: 10px;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
    color: rgb(102, 102, 102);
    text-decoration: none;
    cursor: pointer;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@media screen and (max-width: 800px) {
    .container {
        display: flex;
        flex-direction: column;
        padding: 20px;
    }

    .leftcolumn, .rightcolumn {
        width: 100%;
    }

    .card {
        margin-bottom: 10px;
    }

    .portfolioImg{
        display: absolute;
        margin-bottom: 10px;
        max-width:100%;
    }

    .btn{
        width: 100%;
        height: auto;
    }
}