main {
    display: flex;
    justify-content: center;
    align-items: center;

    margin: 5vh 1%;

    height: min-content;
    min-height: 60vh;
    
    border-radius: 5px;
    box-shadow: 1px 3px 10px rgba(0,0,0,0.344);

    background-color: var(--background-color);
}

.primary-box {
    display: flex;
    justify-content: center;
    align-items: center;

    margin: 6vh;
    padding: 8vh 0;

    height: min-content;
    min-height: 44vh;
    width: 50%;

    border-radius: 5px;
    box-shadow: 1px 3px 10px rgba(0,0,0,0.344);
    
    background-color: var(--primary-background-color);
}

.content {
    border-radius: 5px;
    max-height: 40vh;
}

form {
    display: flex;
    flex-direction: column;
}

form input, select, h2 {
    font-size: 17px;
    padding: 10px 15px;
    margin: 5px;
    border-radius: 8px;
}

form input, select {
    border: solid 1px var(--primary-text-color);
    background-color: var(--form-background-color);
}

form input[type="submit"]:hover {
    background-image: linear-gradient(to right, rgb(0, 255, 0) 0%, rgb(0, 200, 0) 30%, rgb(0, 175, 0) 55%, rgb(0, 125, 0) 85%, rgb(0, 100, 0) 100%);
    cursor: pointer;
    box-shadow: 0px 2px 4px rgba(0,0,0,0.344);
}

form h2 {
    text-align: center;
    color: var(--primary-text-color);
}

::placeholder {
    color: var(--text-color);
}

::-ms-input-placeholder {
    color: var(--text-color);
}

form u {
    color: var(--primary-text-color);
}

@media (max-width: 975px) {
    .primary-box {
        padding: 6vh 0;
        margin: 8vh;
        width: 60%;
    }
}

@media (max-width: 830px) {
    .primary-box {
        width: 70%;
    }
}

@media (max-width: 615px) {
    .primary-box {
        width: 80%;
    }
}

@media (max-width: 515px) {
    .primary-box {
        margin: 8vh 3vh;

        width: 85%;
    }
}

@media (max-width: 450px) {
    .primary-box {
        width: 90%;
    }

    .content {
        width: 90%;
    }
}

@media (max-width: 415px) {
    .primary-box {
        margin: 8vh 2vh;

        width: 100%;
    }
}