index.css

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

ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
    color: inherit;
}

button {
    border: none;
    margin: 0;
    padding: 0;
    background-color: rgba(0, 0, 0, 0);
}

address {
    font-style: normal;
}

body {
    font-family: "Inter", sans-serif;
    font-size: 18px;
    line-height: 1.3;
    color: #E4E5EA;
    background-color: #0E1014;
}

.container {
    max-width: 1180px;
    width: 100%;
    padding: 0 20px;
    margin: 0 auto;
}

@media (max-width: 640px) {
    .container {
        padding: 0 15px;
    }
}

.colored-text {
    font-family: "Inter";
    background: rgb(252,176,69);
    background: linear-gradient(90deg, rgba(252,176,69,1) 26%, rgba(255,63,120,1) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.underlined {
    text-decoration: underline;
}

.ball {
    position: absolute;
    border-radius: 100%;
}

.ball_violet {
    width: 60px;
    height: 60px;
    right: 500px;
    top: 0;
}

.ball_violet img {
    filter: blur(4px);
}

.ball_purple {
    width: 260px;
    height: 260px;
    left: 40%;
    transform: translateY(-60%);
}

.ball_purple img {
    filter: blur(150px);
}

.ball_brown {
    top: 90px;
    left: 35%;
}

.ball_brown img {
    filter: blur(4px);
}

.ball_red {
    top: 220px;
    left: 0;
    transform: translateX(-50%);
}

.ball_red img {
    filter: blur(150px);
}

.header {
    padding-top: 45px;
    margin-bottom: 90px;
}

@media (max-width: 640px) {
    .header {
        position: relative;
        z-index: 2;
        padding: 20px 0;
        background-color: #0E1014;
        margin-bottom: 0;
    }
}

.header__inner {
    display: flex;
    align-items: flex-start;
}

.header__logo {
    margin-right: 25px;
    display: flex;
    flex-direction: column;
    max-width: 165px;
    flex-grow: 1;
}

@media (max-width: 1100px) {
    .header__logo {
        display: none;
    }
}

.header__logo img {
    width: 140px;
    margin-bottom: 10px;
}

.header__logo div {
    font-family: "Montserrat";
    font-weight: 300;
    font-size: 10px;
    line-height: 12px;
    color: #E4E5EA;
}

.header__nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding-top: 5px;
}

.header__menu {
    display: flex;
    margin-right: auto;
    flex-grow: 2;
}

.header__menu a {
    display: block;
    font-size: 16px;
    font-weight: 500;
    color: #E4E5EA;
}

.header__menu li:not(:last-child) {
    margin-right: 30px;
}

@media (max-width: 640px) {
    .header__menu li:last-child {
        display: none;
    }

    .header__menu li:not(:last-child) {
        margin-right: 16px;
    }

    .header__menu {
        justify-content: space-between;
        text-transform: uppercase;
    }
    
    .header__menu a {
        font-size: 12px;
        font-weight: 500;
    }
}

.header__phone {
    font-size: 16px;
    font-weight: 500;
    margin: 0 40px 0 30px;
    white-space: nowrap;
}

@media (max-width: 900px) {
    .header__phone {
        display: none;
    }
}

.header__links {
    display: flex;
    justify-content: space-between;
    max-width: 120px;
    width: 100%;
}

@media (max-width: 760px) {
    .header__links {
        display: none;
    }
}

.header__links li:not(:last-child) {
    margin-right: 5px;
}

.hero {
    margin-bottom: 70px;
}

@media (max-width: 640px) {
    .hero {
        position: relative;
        padding: 40px 0 60px;
        margin-bottom: 0;
    }

    .hero::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        height: 100%;
        backdrop-filter: blur(10px);
    }
}

.hero__inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
}

@media (max-width: 760px) {
    .hero__inner {
        position: relative;
        z-index: 2;
        flex-direction: column;
    }
}

.hero__left-panel {
    max-width: 360px;
    width: 100%;
}

@media (max-width: 760px) {
    .hero__left-panel {
        margin-bottom: 45px;
    }
}

.hero__title {
    font-size: 48px;
    font-weight: 400;
    margin: 0 0 30px;
}

@media (max-width: 760px) {
    .hero__title {
        font-size: 36px;
        margin-bottom: 15px;
    }
}

.hero__title span {
    font-weight: 900;
}

.hero__subtitle {
    font-family: "Montserrat";
    max-width: 275px;
}

.hero__info {
    max-width: 310px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    padding-top: 15px;
}

@media (max-width: 760px) {
    .hero__info {
        align-items: flex-start;
        padding: 0;
    }
}

.hero__info .hero__subtitle {
    max-width: 100%;
    text-align: right;
    margin-bottom: 40px;
}

@media (max-width: 760px) {
    .hero__info .hero__subtitle {
        text-align: left;
        margin-bottom: 20px;
        font-weight: 500;
    }

    .hero__info .hero__subtitle span {
        font-weight: 700;
    }
}

.hero__features {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

@media (max-width: 760px) {
    .hero__features {
        margin-bottom: 0;
    }
}


.hero__features li {
    text-align: right;
    width: calc(50% - 10px);
    margin-bottom: 30px;
}

@media (max-width: 760px) {
    .hero__features li {
        text-align: left;
    }
}

.hero__feature {
    font-size: 18px;
    text-transform: uppercase;
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 6px;
}

@media (max-width: 760px) {
    .hero__feature {
        font-size: 13px;
        font-weight: 400;
        position: relative;
        padding-left: 15px;
    }

    .hero__feature::before {
        content: '';
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%);
        width: 10px;
        height: 1px;
        background: linear-gradient(90deg, rgba(252,176,69,1) 26%, rgba(255,63,120,1) 100%);
    }
}

.hero__desc {
    font-family: "Montserrat";
    font-size: 16px;
    font-weight: 300;
}

@media (max-width: 760px) {
    .hero__desc {
        display: none;
    }
}

.hero__btn {
    font-weight: 500;
    font-size: 16px;
    color: #E4E5EA;
    padding: 20px 35px;
    background-color: #4077F3;
    border: 1px solid #4077F3;
    cursor: pointer;
    transition: background-color 0.2s;
}

.hero__btn:hover {
    background-color: rgba(0, 0, 0, 0);
}

@media (max-width: 760px) {
    .hero__btn {
        display: none;
    }
}

@media (max-width: 640px) {
    .footer {
        position: relative;
        z-index: 2;
        background-color: #0E1014;
        padding-bottom: 50px;
    }
}

.footer__inner {
    padding: 50px 0 20px;
}

.footer__cols {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
}

@media (max-width: 640px) {
    .footer__cols {
        flex-direction: column;
        margin-bottom: 50px;
    }
}

@media (max-width: 640px) {
    .footer__col {
        margin-bottom: 30px;
    }
}

.footer__col_about {
    margin-right: 100px;
}

@media (max-width: 640px) {
    .footer__col_about {
        margin-right: 0;
    }
}

.footer__col_menu {
    margin-right: auto;
}

@media (max-width: 640px) {
    .footer__col_menu {
        margin-right: 0;
    }
}

.footer__col_contacts {
    text-align: right;
}

@media (max-width: 640px) {
    .footer__col_contacts {
        text-align: left;
    }
}

.footer__title {
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #656566;
    margin-bottom: 20px;
}


@media (max-width: 640px) {
    .footer__title {
        font-size: 12px;
    }
}

.footer__menu {
    display: flex;
}

.footer__list {
    font-size: 16px;
}

@media (max-width: 640px) {
    .footer__list a {
        font-size: 14px;
    }
}

.footer__list:not(:last-child) {
    margin-right: 50px;
}

.footer__list li:not(:last-child) {
    margin-bottom: 10px;
}

.footer__social {
    display: flex;
    justify-content: flex-end;
    margin: 20px 0;
}

@media (max-width: 640px) {
    .footer__social {
        justify-content: flex-start;
        margin: 10px 0;
    }
}

.footer__social li:not(:last-child) {
    margin-right: 10px;
}

.footer__phone {
    font-size: 16px;
    font-weight: 500;
}

.footer__copy {
    text-align: right;
    font-family: "Montserrat";
    font-size: 12px;
}

@media (max-width: 640px) {
    .footer__copy {
        text-align: left;
    }
}

.footer__copy div {
    margin-top: 5px;
}
@media (max-width: 640px) {
    .footer__address {
        font-size: 14px;
    }
}