* {
    margin: 0;
    padding: 0;
    font-family: poppins;
}

:root {
    --white-color: white;
    --font-color: rgb(148, 148, 148);
    --green-c: rgb(0, 201, 102);
}

body {
    background-color: rgb(20, 20, 20);
}

.navi {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 80px;
    background-color: rgb(39, 39, 39);
    font-size: 18px;
    margin: 30px 80px;
    border-radius: 9px;

}

nav ul {
    display: flex;
}

ul li {
    list-style: none;
    margin: 0 25px;

}

ul li a {
    text-decoration: none;
    color: var(--font-color);
}

ul li a:hover {
    color: var(--white-color);
}

.right {
    color: var(--font-color);
    /* margin: 0 25px; */
}

.left {
    color: var(--green-c);
    font-size: 25px;
    font-weight: bold;
}

.sayan-color {
    color: var(--white-color);
}

button {
    width: 125px;
    font-size: 18px;
    padding: 5px;
    border: none;
    border-radius: 5px;
    background-color: var(--green-c);
    color: var(--white-color);
}

.first-left a {
    text-decoration: none;
}

.sec-first {
    display: flex;
    justify-content: space-around;
    align-items: center;
    margin: 100px 0px 0px 30px;
}

.first-left {
    margin: 0px 0px 0px 20px;
    /* 15 */
}

.sec-first>div {
    width: 40%;
}

.first-right img {
    margin-left: 52px;
    width: 400px;
}

.hi {
    color: var(--white-color);
    font-size: 40px;
}

.sayanpaul {
    font-size: 70px;
    margin-top: -15px;
    font-weight: bold;
    color: var(--white-color);
}

.text {
    color: var(--white-color);
    font-size: 20px;
}

.frontend-text {
    color: var(--green-c);
}

.circular--square {
    border-radius: 50%;
}

.book {
    margin-top: 24px;
}

.line {
    border: 0;
    background-color: var(--green-c);
    height: 1.2px;
    margin: 75px 84px;
}

.sec-second {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
}

.sec-second>div {
    width: 50%;
}

.sec-img {
    width: 300px;
    border-radius: 50%;

}

.about-button {
    background-color: var(--white-color);
    color: black;
    margin-bottom: 10px;
}

.about-text {
    color: var(--green-c);
    font-size: 30px;
}

.about-details {
    color: var(--white-color);
    margin-top: 15px;
}

.sec-right {
    margin-left: -500px;
}


.sec-third {
    display: flex;
    justify-content: center;
    align-items: center;
}

.sec-third>div {
    width: 40%;
}

.skill-button {
    margin-top: 100px;
    background-color: var(--white-color);
    color: black;
    margin-bottom: 10px;
}

.skill-text {
    color: var(--green-c);
    font-size: 30px;
    text-align: center;
    margin-bottom: 40px;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 60px;
    margin-bottom: 30px;
}

.container img {
    width: 40px;
}

.line2 {
    border: 0;
    background-color: var(--green-c);
    height: 1.2px;
    margin: 0px 84px;
}

.nav-foot {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 80px;
    font-size: 18px;
}

.nav-foot .ul-foot {
    display: flex;
}

.right-foot {
    display: flex;
    gap: 20px;
    color: var(--font-color);
    margin-right: -100px;
}

.left-foot {
    color: var(--green-c);
    font-size: 25px;
    font-weight: bold;
    margin-left: -100px;
}

.sayan-color-foot {
    color: var(--white-color);
}

.right-foot img {
    width: 20px;
    height: 20px;
    object-fit: cover;
    filter: invert(100%);
}

.pic-mobile {
    display: none;
}

.about-2 {
    display: none;
}

.right-foot a {
    text-decoration: none;
    color: var(--font-color);
}


/* Responsive */

@media only screen and (max-width: 600px) {

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;

    }

    .navi {
        display: block;
    }

    .navi {
        display: flex;
        justify-content: space-around;
        align-items: center;
        height: 80px;
        background-color: rgb(38, 38, 38);
        /* font-size: 15px; */
        margin: 0px 0px;
        border-radius: 0px;

    }

    nav ul {
        display: flex;
    }

    ul li {
        /* list-style: none;
        margin: 0 25px; */
        display: none;

    }

    ul li a {
        text-decoration: none;
        color: var(--font-color);
    }

    ul li a:hover {
        color: var(--white-color);
    }

    .right button {
        color: var(--white-color);
        font-size: 16px;
        /* background-color: aqua; */
        margin: 0px 12px 0px 0px;
    }

    .left {
        color: var(--green-c);
        font-size: 20px;
        font-weight: bold;
        margin-left: 6px;
    }

    .sayan-color {
        color: var(--white-color);
    }

    button {
        width: 125px;
        font-size: 18px;
        padding: 5px;
        border: none;
        border-radius: 5px;
        background-color: var(--green-c);
        color: var(--white-color);
    }


    .pic-mobile {
        display: block;
        display: flex;
        justify-content: center;
        align-items: center;

    }

    .sec-first {
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        margin: 50px 0px 0px 0px;
    }

    .pic-mobile img {
        width: 250px;
        height: 250px;


    }


    .first-left {

        margin-top: 40px;
    }

    .sec-first>div {
        width: 80vw;
    }

    .first-right img {
        /* margin-left: 52px;
            width:400px; */
        display: none;
    }

    .hi {
        color: var(--white-color);
        font-size: 20px;
    }

    .sayanpaul {
        font-size: 30px;
        font-weight: bold;
        color: var(--white-color);
        margin: 0px 0px 0px 0px;

    }

    .text {
        color: var(--white-color);
        font-size: 20px;
        margin: 0px 0px 0px 0px;

        /* padding-bottom: 30px; */

    }

    .book {
        display: block;
        /* margin: 0 auto; */

    }

    .line {
        margin: 40px 78px;
    }

    /* second section */

    .sec-second>div {
        width: 74.8vw;
    }

    .sec-left {
        display: none;
    }

    .sec-right {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        /* margin: 100px 0px 0px 0px; */
    }

    .margin {
        margin-top: -25px;
    }

    .about-button {
        margin: 0;
        padding: 0;
        display: none;
    }

    .about-2 {
        display: block;
        color: rgb(0, 0, 0);
        background-color: var(--white-color);
        font-size: 18px;
        width: 120px;
        padding: 6px;
        border: none;
        border-radius: 5px;
        margin: 0 auto;

        /* margin: 20px 150px; */
    }

    .about-d {
        margin-top: 20px;
    }

    .about-text {
        padding-top: 20px;
        color: var(--green-c);
        font-size: 20px;
        text-align: center;
    }

    .about-details {
        color: var(--white-color);
        margin-top: 20px;
        text-align: center;
    }


    /*Third Section*/


    .sec-third {
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .top {
        display: block;
    }

    .sec-third>div {
        width: 80vw;
    }

    .skill-button {
        margin-top: 40px;
        background-color: var(--white-color);
        color: black;
        margin-bottom: 20px;
    }

    .skill-text {
        color: var(--green-c);
        font-size: 18px;
        text-align: center;
        margin-bottom: 40px;
    }

    .fourth {
        display: block;
    }

    .container {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 20px;
        margin-bottom: 30px;
    }

    .container img {
        width: 35px;
    }

    .line2 {
        margin: 15px 78px;
    }

    .sec-right {
        display: block;
        margin: 0px 0px 0px 0px;
    }

    /* footer */

    .nav-foot {
        display: block;
    }

    .nav-foot {
        display: flex;
        justify-content: space-around;
        align-items: center;
        height: 70px;
        font-size: 18px;
        margin-top: -12px;
    }

    .phone,
    .email {
        display: none;
    }

    .left-foot {
        color: var(--green-c);
        font-size: 20px;
        font-weight: bold;
        margin-left: -10px;
    }

    .right-foot {
        display: flex;
        gap: 20px;
        color: var(--font-color);
        margin-right: -10px;
    }

    .sayan-color-foot {
        color: var(--white-color);
    }

    .right-foot img {
        width: 20px;
        height: 20px;
    }
}

/* Responsive 2 */
@media (min-width: 1171px) and (max-width: 1300px) {

    .sec-left img {
        display: none;
    }

    .sec-second>div {
        width: 70vw;
    }

    .sec-left {
        display: none;
    }

    .sec-right {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        margin: 100px 0px 0px 0px;
    }

    .margin {
        margin-top: -100px;
    }

    .about-button {
        margin: 0;
        padding: 0;
        display: none;
    }

    .about-2 {
        display: block;
        color: rgb(0, 0, 0);
        background-color: var(--white-color);
        /* font-size: 18px; */
        width: 120px;
        padding: 6px;
        border: none;
        border-radius: 5px;
        margin: 0 auto;

        /* margin: 20px 150px; */
    }

    .about-d {
        margin-top: 20px;
        font-size: 30px;
    }

    .about-text {
        padding-top: 20px;
        color: var(--green-c);
        font-size: 20px;
        text-align: center;
    }

    .about-details {
        color: var(--white-color);
        margin-top: 20px;
        text-align: center;
    }

    /* third section */
    .skill-button {
        font-size: 20px;
    }

    .skill-button {
        margin-top: 55px;
        background-color: var(--white-color);
        color: black;
        margin-bottom: 10px;
    }

}


/* responsive 3 */
@media (min-width: 1081px) and (max-width: 1170px) {

    .first-right img {
        display: none;
    }



    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;

    }

    .navi {
        display: flex;
        justify-content: space-around;
        align-items: center;
        height: 80px;
        background-color: rgb(39, 39, 39);
        font-size: 18px;
        margin: 30px 80px;
        border-radius: 9px;

    }

    nav ul {
        display: flex;
    }

    ul li {
        list-style: none;
        margin: 0 16px;

    }

    ul li a {
        text-decoration: none;
        color: var(--font-color);
    }

    ul li a:hover {
        color: var(--white-color);
    }

    .right {
        color: var(--font-color);
        /* margin: 0 25px; */
    }

    .left {
        color: var(--green-c);
        font-size: 25px;
        font-weight: bold;
    }

    .sayan-color {
        color: var(--white-color);
    }

    button {
        width: 125px;
        font-size: 18px;
        padding: 5px;
        border: none;
        border-radius: 5px;
        background-color: var(--green-c);
        color: var(--white-color);
    }


    .pic-mobile {
        display: block;
        display: flex;
        justify-content: center;
        align-items: center;

    }

    .sec-first {
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        margin: 50px 0px 0px 0px;
    }

    .pic-mobile img {
        width: 400px;
        height: 400px;


    }


    .first-left {

        margin-top: 40px;
    }

    .sec-first>div {
        width: 40vw;
    }

    .first-right img {
        /* margin-left: 52px;
    width:400px; */
        display: none;
    }

    .hi {
        color: var(--white-color);
        /* font-size: 20px; */
    }

    .sayanpaul {
        /* font-size: 30px; */
        font-weight: bold;
        color: var(--white-color);
        margin: 0px 0px 0px 0px;

    }

    .text {
        color: var(--white-color);
        /* font-size: 20px; */
        margin: 0px 0px 0px 0px;

        /* padding-bottom: 30px; */

    }

    .book {
        display: block;
        /* margin: 0 auto; */

    }

    .line {
        margin: 40px 78px;
    }


    .sec-left img {
        display: none;
    }

    .sec-second>div {
        width: 70vw;
    }

    .sec-left {
        display: none;
    }

    .sec-right {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        margin: 100px 0px 0px 0px;
    }

    .margin {
        margin-top: -100px;
    }

    .about-button {
        margin: 0;
        padding: 0;
        display: none;
    }

    .about-2 {
        display: block;
        color: rgb(0, 0, 0);
        background-color: var(--white-color);
        /* font-size: 18px; */
        width: 120px;
        padding: 6px;
        border: none;
        border-radius: 5px;
        margin: 0 auto;

        /* margin: 20px 150px; */
    }

    .about-d {
        margin-top: 20px;
        font-size: 30px;
    }

    .about-text {
        padding-top: 20px;
        color: var(--green-c);
        font-size: 20px;
        text-align: center;
    }

    .about-details {
        color: var(--white-color);
        margin-top: 20px;
        text-align: center;
    }

    /* third section */

    .sec-third>div {
        width: 50%;
    }

    .skill-button {
        font-size: 20px;
    }


    .skill-button {
        margin-top: 40px;
        background-color: var(--white-color);
        color: black;
        margin-bottom: 10px;
    }

    .skill-text {
        color: var(--green-c);
        font-size: 30px;
        text-align: center;
        margin-bottom: 40px;
    }

}

/* responsive 4 */
@media (min-width: 601px) and (max-width: 1080px) {

    .navi {
        display: block;
    }

    .navi {
        display: flex;
        justify-content: space-around;
        align-items: center;
        height: 80px;
        background-color: rgb(38, 38, 38);
        /* font-size: 15px; */
        margin: 0px 0px 0px 0px;
        border-radius: 0px;

    }

    nav ul {
        display: flex;
    }

    ul li {
        /* list-style: none;
        margin: 0 25px; */
        display: none;

    }

    ul li a {
        text-decoration: none;
        color: var(--font-color);
    }

    ul li a:hover {
        color: var(--white-color);
    }

    .right button {
        color: var(--white-color);
        /* font-size: 16px; */
        /* background-color: aqua; */
        margin: 0px 12px 0px 0px;
    }

    .left {
        color: var(--green-c);
        /* font-size: 20px; */
        font-weight: bold;
        margin-left: 6px;
    }

    .sayan-color {
        color: var(--white-color);
    }

    button {
        width: 125px;
        font-size: 18px;
        padding: 5px;
        border: none;
        border-radius: 5px;
        background-color: var(--green-c);
        color: var(--white-color);
    }


    .pic-mobile {
        display: block;
        display: flex;
        justify-content: center;
        align-items: center;

    }

    .sec-first {
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        margin: 50px 0px 0px 0px;
    }

    .pic-mobile img {
        width: 300px;
        height: 300px;


    }


    .first-left {

        margin-top: 40px;
    }

    .sec-first>div {
        width: 50vw;
    }

    .first-right img {
        /* margin-left: 52px;
            width:400px; */
        display: none;
    }

    .hi {
        color: var(--white-color);
        font-size: 20px;
    }

    .sayanpaul {
        font-size: 30px;
        font-weight: bold;
        color: var(--white-color);
        margin: 0px 0px 0px 0px;

    }

    .text {
        color: var(--white-color);
        font-size: 20px;
        margin: 0px 0px 0px 0px;

        /* padding-bottom: 30px; */

    }

    .book {
        display: block;
        /* margin: 0 auto; */

    }

    .sec-left img {
        display: none;
    }

    .sec-second>div {
        width: 70vw;
    }

    .sec-left {
        display: none;
    }

    .sec-right {
        width: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        flex-direction: column;
        margin: 100px 0px 0px 0px;
    }

    .margin {
        margin-top: -50px;
    }

    .about-button {
        margin: 0;
        padding: 0;
        display: none;
    }

    .about-2 {
        display: block;
        color: rgb(0, 0, 0);
        background-color: var(--white-color);
        /* font-size: 18px; */
        width: 120px;
        padding: 6px;
        border: none;
        border-radius: 5px;
        margin: 0 auto;

        /* margin: 20px 150px; */
    }

    .about-d {
        margin-top: 20px;
        font-size: 30px;
    }

    .about-text {
        padding-top: 20px;
        color: var(--green-c);
        font-size: 20px;
        text-align: center;
    }

    .about-details {
        color: var(--white-color);
        margin-top: 20px;
        text-align: center;
    }

    /* third section */
    .skill-button {
        font-size: 20px;
    }


    .sec-third {
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .top {
        display: block;
    }

    .sec-third>div {
        width: 65vw;
    }

    .skill-button {
        margin-top: 40px;
        background-color: var(--white-color);
        color: black;
        margin-bottom: 20px;
    }

    .skill-text {
        color: var(--green-c);
        /* font-size: 30px; */
        text-align: center;
        margin-bottom: 40px;
    }

    .fourth {
        display: block;
    }

    .container {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 20px;
        margin-bottom: 30px;
    }

    .container img {
        width: 35px;
    }

    .line2 {
        margin: 15px 78px;
    }

    .sec-right {
        display: block;
        margin: 0px 0px 0px 0px;
    }


    /* footer */

    .nav-foot {
        display: block;
    }

    .nav-foot {
        display: flex;
        justify-content: space-around;
        align-items: center;
        height: 70px;
        font-size: 18px;
        margin-top: 5px;
    }

    .phone,
    .email {
        display: none;
    }

    .left-foot {
        color: var(--green-c);
        font-size: 20px;
        font-weight: bold;
        margin-left: -10px;
    }

    .right-foot {
        display: flex;
        gap: 20px;
        color: var(--font-color);
        margin-right: -10px;
    }

    .sayan-color-foot {
        color: var(--white-color);
    }

    .right-foot img {
        width: 20px;
        height: 20px;
    }
}