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

body {
    background-color: #f0f0f0;
    font-family: 'orbitron', sans-serif;
    overflow-x: hidden;
    overflow-y: auto;
}

header {
    background-color: #f0f0f0;
    color: #222;
    display: flex;
    font-size: 70px;
    height: 100vh;
    width: 100vw;
    letter-spacing: 3px;
    font-family: 'blanka', sans-serif;
    animation: heightSize 3s ease-in-out forwards;
    animation-delay: 2.5s;
}

@keyframes heightSize {
    0% {
        height: 100vh;
}
    100% {
        height: 10vh;
        font-size: 30px;
    }
}

.usman {
    width: 50%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: right;
    background-color: #222;
    color: #f0f0f0;
}

.usman-title {
    margin-right: 10px;
    animation: slideLeft 2s ease-in-out;
}

@keyframes slideLeft {
    0% {
        transform: translateX(-100%);
        opacity: 0;
}
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

.khatri {
    width: 50%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: left;
}

.khatri-title {
    margin-left: 10px;
    animation: slideRight 2s ease-in-out forwards;
}

@keyframes slideRight {
    0% {
        transform: translateX(100%);
        opacity: 0;
}
    100% {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    header {
        font-size: 60px;
    }
    @keyframes heightSize {
        0% {
            height: 100vh;
        }
        100% {
            height: 10vh;
            font-size: 25px;
        }
    }
}

@media (min-width: 426px) and (max-width: 768px) {
    header {
        font-size: 50px;
        flex-direction: column;
    }
    .usman {
        width: 100%;
        height: 50%;
        justify-content: center;
    }
    .usman-title {
        margin-right: 7px;
    }
    .khatri {
        width: 100%;
        height: 50%;
        justify-content: center;
    }
    .khatri-title {
        margin-left: 7px;
    }
    @keyframes heightSize {
        0% {
            height: 100vh;
        }
        100% {
            height: 20vh;
            font-size: 20px;
            flex-direction: row;
        }
    }
}

@media (max-width: 425px) {
    header {
        font-size: 30px;
        flex-direction: column;
    }
    .usman {
        width: 100%;
        height: 50%;
        justify-content: center;
    }
    .usman-title {
        margin-right: 5px;
    }
    .khatri {
        width: 100%;
        height: 50%;
        justify-content: center;
    }
    .khatri-title {
        margin-left: 5px;
    }
    @keyframes heightSize {
        0% {
            height: 100vh;
        }
        100% {
            height: 20vh;
            font-size: 18px;
            flex-direction: row;
            letter-spacing: 2px;
        }
    }
}