app.css

$tiber: #09383E;
$elephant: #0C383E;
$white: #fff;

html { font-size: 62.5%; }
body { font-size: 1.4rem;
      background-color: yellow;} 
h1   { font-size: 2.4rem; } /* =24px */

.container__item {
    margin: 0 auto 40px;
}

.landing-page-container {
    width: 100%;
    min-height: 100%;
    height: 90rem;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: bottom;
    overflow: hidden;
    font-family: 'Montserrat', sans-serif;
    color: $tiber;
}

.content__wrapper {
    max-width: 1200px;
    width: 90%;
    height: 100%;
    margin: 0 auto;
    position: relative;
}

.header {
    width: 100%;
    height: 2rem;
    padding: 4.5rem 0;
    display: block;
}

.menu-icon-1 {
/*    margin-top: 1rem;*/
    width: 2.5rem;
    height: 1.5rem;
    display: inline-block;
    cursor: pointer;
    margin-right: 2rem;
}


.header__item {
    display: inline-block;
    float: left;
    margin-top: -4rem;

}

.menu-icon__line {
    width: 1.5rem;
    height: 0.2rem;
    background-color: $elephant;
    display: block;

    &:before,
    &:after {
        content: '';
        width: 1.5rem;
        height: 0.2rem;
        background-color: $elephant;
        display: inline-block;
        position: relative;
    }

    &:before {
        left: 0.5rem;
        top: -0.6rem;
    }

    &:after {
        top: -1.8rem;
    }
}

.heading {
    width: 90%;
    font-size: 2rem;
    font-weight: bold;
    margin: 0;
    line-height: 1.7rem;
    margin: 0 auto;
    text-align: center;
}

.social-container {
    width: 7.25rem;
    list-style: none;
    overflow: hidden;
    padding: 0;
    margin: 0;
    float: right;

    .social__icon {
        float: left;
        cursor: pointer;

        &.social__icon--dr {
          margin-left: 0.5rem;
          
          img {
             height: 2rem;
          }
        }
        &.social__icon--in {
          margin-left: 0.75rem;
          
          img {
             height: 2rem;
          }
        }

        &.social__icon--fb {
            img {
                height: 2rem;
                margin: 0rem;
            }
        }
    }
}

.coords {
    font-size: 1rem;
    display: inline-block;
    transform: rotate(-90deg) translateY(50%);
    float: left;
    position: relative;
    top: 40%;
    letter-spacing: 0.2rem;
    left: -11.5rem;
    margin: 0;
}

.ellipses-container {
    width: 50rem;
    height: 50rem;
    border-radius: 50%;
    margin: 0 auto;
    position: relative;
    top: 10.5rem;

    .greeting {
        position: relative;
        top: 11.6rem;
        left: 2rem;
        right: 0;
        margin: 0 auto;
        text-transform: uppercase;
        letter-spacing: 4rem;
        font-size: 1rem;
        font-weight: 400;
        opacity: 0.5;

        &:after{
            content: '';
            width: 0.3rem;
            height: 0.3rem;
            border-radius: 50%;
            display: inline-block;
            background-color: $elephant;
            position: relative;
            top: -0.65rem;
            left: -5.05rem;
        }
    }

}

.ellipses {
    border-radius: 50%;
    position: absolute;
    top: 0;
    border-style: solid;
}

.ellipses__outer--thin {
    width: 100%;
    height: 100%;
    border-width: 1px;
    border-color: rgba(9, 56, 62, 0.1);
    animation: ellipsesOrbit 15s ease-in-out infinite;


    &:after {
      content: "";
      background-image: url('https://s29.postimg.org/5h0r4ftkn/ellipses_dial.png');
      background-repeat: no-repeat;
      background-position: center;
      top: 0;
      left: 0;
      bottom: 0;
      right: 0;
      position: absolute;
      opacity: 0.15;
    }
}

.ellipses__outer--thick {
    width: 99.5%;
    height: 99.5%;
    border-color: $tiber transparent;
    border-width: 2px;
    transform: rotate(-45deg);
    animation: ellipsesRotate 15s ease-in-out infinite;
}

.ellipses__orbit {
    width: 2.5rem;
    height: 2.5rem;
    border-width: 2px;
    border-color: $tiber;
    top: 5rem;
    right: 6.75rem;

    &:before {
        content: '';
        width: 0.7rem;
        height: 0.7rem;
        border-radius: 50%;
        display: inline-block;
        background-color: $tiber;
        margin: 0 auto;
        left: 0;
        right: 0;
        position: absolute;
        top: 50%;
        transform: translateY(-50%);

    }
}

.scroller {
    width: 7.5rem;
    display: inline-block;
    float: right;
    position: relative;
    top: -15%;
    transform: translateY(50%);
    overflow: hidden;


    .page-title {
        font-family: 'Playfair Display', serif;
        letter-spacing: 0.5rem;
        display: inline-block;
        float: left;
        margin-top: 1rem;
    }

    .timeline {
        width: 1.5rem;
        height: 9rem;
        display: inline-block;
        float: right;

        .timeline__unit {
            width: 100%;
            height: 0.1rem;
            display: block;
            background-color: $elephant;
            margin: 0 0 2rem;
            opacity: 0.2;

            &.timeline__unit--active {
                opacity: 1;

                &:after {
                    opacity: 0.2;
                }
            }

            &:after {
                content: '';
                width: 70%;
                height: 0.1rem;
                display: block;
                position: relative;
                float: right;
                background-color: $elephant;
                top: 1rem;
            }
        }
    }
}


@keyframes ellipsesRotate {
    0% {
        transform: rotate(-45deg);
    }

    100% {
        transform: rotate(-405deg);
    }
}

@keyframes ellipsesOrbit {
    0% {
        transform: rotate(0);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* ... (The rest of your CSS code remains unchanged) ... */

/* Media Queries for Responsiveness */
@media (max-width: 1024px) {
    .ellipses-container {
        width: 40rem;
        height: 40rem;
        top: 8rem;
    }

    .coords {
        left: -9rem;
    }

    .ellipses-container .greeting {
        top: 9.5rem;
        left: 10rem;
        font-size: 1.8rem;
    }

    .menu-icon-1 {
        margin-top: 5rem;
    }

    .menu-icon-1 + .header__item {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .ellipses-container {
        width: 8.5rem;
        height: 8.5rem;
        top: 6rem;
    }

    .coords {
        left: -7rem;
    }

    .header {
        padding: 3rem 0;
    }

    .menu-icon-1 {
        margin-top: 5rem;
    }

    .heading {
        font-size: 1.6rem;
        margin-left: 2rem;
    }

    .ellipses-container .greeting {
        top: 7rem;
        left: -7rem;
        font-size: 1.6rem;
        letter-spacing: 3rem;
    }

    .menu-icon-1 + .header__item {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .ellipses-container {
        width: 8.5rem;
        height: 8.5rem;
        top: 4rem;
    }

    .coords {
        left: -5rem;
    }

    .header {
        padding: 2rem 0;
    }

    .menu-icon-1 {
        margin-top: 3rem;
    }

    .heading {
        font-size: 1.2rem;
        margin-left: 1rem;
    }

    .ellipses-container .greeting {
        top: 7rem;
        left: -4rem;
        font-size: 1rem;
        letter-spacing: 2rem;
    }

    .menu-icon-1 + .header__item {
        width: 100%;
        text-align: center;
    }
}

@media (max-width: 320px) {
    .ellipses-container {
        width: 8.5rem;
        height: 8.5rem;
        top: 5rem;
    }

    .coords {
        left: -3rem;
    }

    .header {
        padding: 1rem 0;
    }

    .menu-icon-1 {
        margin-top: -1rem;
    }

    .heading {
        font-size: 1rem;
        margin-left: 5rem;
    }

    .ellipses-container .greeting {
        top: 9rem;
        left: -3rem;
        font-size: 1rem;
        letter-spacing: 1.5rem;
    }

    .menu-icon-1 + .header__item {
        width: 100%;
        text-align: center;
    }
}