/* fonts */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

/* vars */

:root {
    --primary-color: #6500FF;
    --white-color: #ffffff;
    --text-color: #484848;
    --gray-color: #888888;
    --invert-primary-color: #9855FF;
    --invert-text-color: #FFFFFF;
    --invert-bg-color: #283137;
}

/* styles */

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

body {
    min-height: 100vh;
    font-family: Montserrat;
    background: var(--white-color);
    transition: .3s;
}

a {
    text-decoration: none;
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    padding: 0 10px;
    width: 100%;
    margin: 0 auto;
}

.header {
    padding: 23px;
    background: var(--white-color);
    box-shadow: 0px -2px 10px rgba(0,0,0,.1);
    transition: .3s;
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
}

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

.header__logo {
    font-weight: 600;
    font-size: 20px;
    color: var(--text-color);
    transition: .3s;
}

.header__rightside {
    display: flex;
    align-items: center;
}

.header-menu__list {
    display: flex;
    align-items: center;
}

.header-menu__item {
    padding: 0 10px;
}

.header-menu__link {
    font-weight: 500;
    font-size: 18px;
    color: var(--text-color);
    display: inline-flex;
    position: relative;
    transition: .3s;
}

.header-menu__link:after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -10px;
    width: 0;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: .3s;
}

.header-menu__link:hover:after {
    width: 100%;
}

.header__moon {
    display: flex;
    align-items: center;
    margin-left: 10px;
    font-size: 24px;
    color: var(--text-color);
    cursor: pointer;
    transition: .3s;
}

.header__mob-menu {
    display: flex;
    align-items: center;
    margin-left: 10px;
    font-size: 26px;
    color: var(--text-color);
    cursor: pointer;
    transition: .3s;
}

.header__mob {
    display: none;
}

.intro {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
}

.intro__body {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 30px 0;
}

.intro__content {
    max-width: 500px;
    width: 100%;
    padding-right: 20px;
}

.intro__img {
    max-width: 500px;
    width: 100%;
}

.intro__img img {
    display: block;
    width: 100%;
}

.intro__title {
    font-weight: 600;
    font-size: 64px;
    line-height: 1.2;
    color: var(--text-color);
    margin-bottom: 10px;
    transition: .3s;
}

.intro__title span {
    color: var(--primary-color);
    transition: .3s;
}

.intro__position {
    display: block;
    font-weight: 500;
    font-size: 24px;
    color: var(--gray-color);
    margin-bottom: 25px;
}

.intro__text {
    font-size: 16px;
    line-height: 1.3;
    color: var(--text-color);
    margin-bottom: 30px;
    transition: .3s;
}

.btn {
    display: inline-flex;
    background: transparent;
    border: 2px solid var(--primary-color);
    border-radius: 30px;
    padding: 13px 36px;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 16px;
    color: var(--primary-color);
    transition: .3s;
}

.btn .bx {
    font-size: 24px;
}

.btn:hover {
    background: var(--primary-color);
    color: var(--white-color);
}

.intro-soc {
    display: flex;
    margin: 0 -10px;
    margin-top: 40px;
    align-items: center;
}

.intro-soc__item {
    padding: 0 10px;
}

.intro-soc__link {
    display: flex;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--primary-color);
    background: transparent;
    font-size: 24px;
    color: var(--primary-color);
    transition: .3s;
}

.intro-soc__link:hover {
    background: var(--primary-color);
    color: var(--white-color);
    transform: scale(1.25);
}

/* black styles */

body.is-black {
    background: var(--invert-bg-color);
}

.is-black .header {
    background: var(--invert-bg-color);
    box-shadow: 0px -2px 10px rgba(0,0,0,.5);
}

.is-black .header__logo {
    color: var(--invert-text-color);
}

.is-black .header-menu__link {
    color: var(--invert-text-color);
}

.is-black .header-menu__link:after {
    background: var(--invert-primary-color);
}

.is-black .header__moon {
    color: var(--invert-text-color);
}

.is-black .intro__title {
    color: var(--invert-text-color);
}

.is-black .intro__title span {
    color: var(--invert-primary-color);
}

.is-black .intro__text {
    color: var(--invert-text-color);
}

.is-black .btn {
    color: var(--invert-primary-color);
    border-color: var(--invert-primary-color);
}

.is-black .btn:hover {
    background: var(--invert-primary-color);
    color: var(--white-color);
}

.is-black .intro-soc__link {
    color: var(--invert-primary-color);
    border-color: var(--invert-primary-color);
}

.is-black .intro-soc__link:hover {
    background: var(--invert-primary-color);
    color: var(--white-color);
}

.is-black .header__mob-menu {
    color: var(--invert-text-color);
}

/* media queries */

@media (max-width: 1023px) {
    .header-menu__link {
        font-size: 16px;
    }
    .header__logo {
        font-size: 24px;
    }
    .intro__title {
        font-size: 42px;
    }
    .intro__position {
        font-size: 18px;
        margin-bottom: 20px;
    }
    .intro__text {
        font-size: 14px;
        margin-bottom: 20px;
    }
    .intro-soc {
        margin-top: 20px;
    }
    .btn {
        font-size: 14px;
    }
    .btn .bx {
        font-size: 20px;
    }
}

@media (max-width: 767px) {
    .header {
        padding: 20px 0;
    }
    .intro {
        min-height: calc(100vh - 69px);
    }
    .header-menu {
        position: fixed;
        top: 69px;
        left: 100%;
        width: 100%;
        height: calc(100vh - 69px);
        background: rgba(255,255,255,.9);
        display: flex;
        justify-content: center;
        align-items: center;
        transition: .3s;
    }
    .header-menu.is-active {
        left: 0;
    }
    .header-menu__list {
        flex-direction: column;
    }
    .header__mob {
        display: block;
    }
    .is-black .header-menu {
        background: rgba(0,0,0,.8);
    }
    .header-menu__item:not(:last-child) {
        margin-bottom: 20px;
    }
    .header-menu__link {
        font-size: 24px;
    }
    .intro__body {
        flex-direction: column-reverse;
    }
    .intro__img {
        margin-bottom: 30px;
    }
    .inro__content {
        padding: 0;
    }
    .intro__title {
        font-size: 32px;
        text-align: center;
    }
    .intro__position {
        text-align: center;
    }
    .intro__text {
        text-align: center;
    }
    .intro__btn {
        display: flex;
        justify-content: center;
    }
    .intro-soc {
        justify-content: center;
    }
}