Machinetest.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap');
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

nav {
    position: fixed;
    background: white;
    width: 100%;
    padding: 10px 0;
    z-index: 12;
}

nav .menu {
    max-width: 1250px;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    /* display: grid;
    grid-template-columns: auto auto auto auto;
    grid-template-rows: auto auto auto auto;
    justify-content: space-between; */
}

#ag {
    width: 100px;
    height: 100px;
}

.menu ul {
    display: inline-flex;
    float: right;
}

.menu ul li {
    list-style: none;
    margin-left: 7px;
}

.menu ul li:first-child {
    margin-left: 0px;
}

.menu ul li a {
    text-decoration: none;
    color: gray;
    opacity: 1;
    font-size: 18px;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.menu ul li a:hover {
    color: skyblue;
    background-color: white;
}

.img {
    background: url('art2.jpeg')no-repeat;
    width: 100%;
    height: 100vh;
    background-size: cover;
    background-position: center;
    position: relative;
}

.img::before {
    content: '';
    position: absolute;
    height: 100%;
    width: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.center {
    position: absolute;
    top: 52%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    padding: 0 20px;
    text-align: center;
}

.center .title {
    color: white;
    font-size: 55px;
    font-weight: 600;
}

button {
    width: 150px;
    height: 70px;
    border-radius: 5px;
}

button:hover {
    color: white;
    background-color: transparent;
}

.list-inline-item {
    display: inline;
}

.footer-basic {
    padding: 40px 0;
    background-color: #ffffff;
    color: #4b4c4d;
}

.footer-basic ul {
    padding: 0;
    list-style: none;
    text-align: center;
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 0;
}

#alist {
    text-decoration: none;
    color: gray;
    opacity: 1;
    font-size: 20px;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

#alist :hover {
    color: blue;
}

.footer-basic li {
    padding: 0 10px;
}

.footer-basic .copyright {
    margin-top: 15px;
    text-align: center;
    font-size: 14px;
    color: #aaa;
    margin-bottom: 0;
}

.about {
    color: gray;
    width: 100%;
    height: 100vh;
    background-size: cover;
    background-position: center;
    position: relative;
}

.abou-title {
    font-size: 55px;
    font-weight: 600;
    opacity: 0.9px;
}

.abnav {
    position: fixed;
    background: gray;
    width: 100%;
    padding: 10px 0;
    z-index: 12;
}

.container {
    width: 85%;
    background: #fff;
    border-radius: 6px;
    padding: 20px 60px 30px 40px;
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
}

.container .content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.container .content .left-side {
    width: 25%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-top: 15px;
    position: relative;
}

.content .left-side::before {
    content: '';
    position: absolute;
    height: 70%;
    width: 2px;
    right: -15px;
    top: 50%;
    transform: translateY(-50%);
    background: #afafb6;
}

.content .left-side .details {
    margin: 14px;
    text-align: center;
}

.content .left-side .details i {
    font-size: 30px;
    color: gray;
    margin-bottom: 10px;
}

.content .left-side .details .topic {
    font-size: 18px;
    font-weight: 500;
}

.content .left-side .details .text-one,
.content .left-side .details .text-two {
    font-size: 14px;
    color: #afafb6;
}

.container .content .right-side {
    width: 75%;
    margin-left: 75px;
}

.content .right-side .topic-text {
    font-size: 23px;
    font-weight: 600;
    color: gray;
}

.right-side .input-box {
    height: 50px;
    width: 100%;
    margin: 12px 0;
}

.right-side .input-box input,
.right-side .input-box textarea {
    height: 100%;
    width: 100%;
    border: none;
    outline: none;
    font-size: 16px;
    background: #F0F1F8;
    border-radius: 6px;
    padding: 0 15px;
    resize: none;
}

.right-side .message-box {
    min-height: 110px;
}

.right-side .input-box textarea {
    padding-top: 6px;
}

.right-side .button {
    display: inline-block;
    margin-top: 12px;
}

.right-side .button input[type="button"] {
    color: #fff;
    font-size: 18px;
    outline: none;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    background: #3e2093;
    cursor: pointer;
    transition: all 0.3s ease;
}

.button input[type="button"]:hover {
    background: #5029bc;
}

@media (max-width: 950px) {
    .container {
        width: 90%;
        padding: 30px 40px 40px 35px;
    }
    .container .content .right-side {
        width: 75%;
        margin-left: 55px;
    }
}

@media (max-width: 820px) {
    .container {
        margin: 40px 0;
        height: 100%;
    }
    .container .content {
        flex-direction: column-reverse;
    }
    .container .content .left-side {
        width: 100%;
        flex-direction: row;
        margin-top: 40px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .container .content .left-side::before {
        display: none;
    }
    .container .content .right-side {
        width: 100%;
        margin-left: 0;
    }
}

.bus {
    width: 100px;
    height: 50px;
    border-radius: 5px;
}

.bus :hover {
    color: black;
}