* {
    padding: 0;
    margin: 0;
}

a {
    text-decoration: none;
}

ul {
    list-style: none;
}

.container {
    width: 1200px;
    margin: auto;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 1);
    box-shadow: 0px 4px 20px 0px rgba(0, 0, 0, 0.1);
    padding: 18px 100px;
}

.header__nav {
    display: flex;
    justify-content: space-between;
}

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

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

.header__lists li a {
    color: rgba(0, 0, 0, 1);
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 400;
    font-size: 15px;
    line-height: 24px;
    letter-spacing: 0%;
    margin: 16px;
    position: relative;
}

.header__lists li a::after {
    content: "";
    display: block;
    background: rgba(0, 186, 252, 1);
    border-radius: 23px 10px 0 0;
    width: 0;
    height: 2px;
    position: absolute;
    bottom: -10px;
    transition: .5s;
    margin-left: 15px;
}

.header__lists li a:hover {
    color: rgba(0, 186, 252, 1);
}

.header__lists li a:hover::after {
    width: 100%;

}

.btn {
    color: white;
    background: rgba(0, 186, 252, 1);
    font-family: Arial;
    font-weight: 700;
    font-size: 15px;
    line-height: 24px;
    letter-spacing: 0%;
    border-radius: 5px;
    padding: 8px 16px;
}

.header__lists__btn{
    transition: .5s;
    margin-left: ;
}

.header__lists__btn:hover{
     background: white;
    color: rgba(0, 186, 252, 1);
}

/* header start */

.header__contents {
    display: flex;
    justify-content: space-between;
    align-items: center;
    column-gap: 172px;
    margin: 80px 0;
}

.header__content {
    margin: 17px 0;
    width: 470px;
    height: 224px;
    display: flex;
    flex-direction: column;
    row-gap: 16px;
}

.header__content h1 {
    color: rgba(0, 0, 0, 1);
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 700;
    font-size: 30px;
    line-height: 130%;
    letter-spacing: 0%;
}

.header__content p{
    color: rgba(0, 0, 0, 1);
    font-family: Open Sans;
    font-weight: 400;
    font-size: 18px;
    line-height: 24px;
    letter-spacing: 0%;
    width: 465px;
}

.header__content__btn{
    max-width: 232px;
    text-align: center;
    transition: .5;
}

.header__content__btn:hover{
    background: white;
    color: rgba(0, 186, 252, 1);
}

.header__content2 {
    width: 458;
    height: 258;
    opacity: 1;
}
/* header end */