body {
    background-color: #23396e;
}

.pc {
    margin-left: auto;
    margin-right: auto;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

.mobile {
    margin-left: auto;
    margin-right: auto;
    padding-top: 0;
    margin-bottom: 0;
    visibility: collapse;
    line-height: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif
}

@media only screen and (min-width: 1450px) {
    .credits {
        margin-top: 2.5%;
        color:blue;
    }
}

@media only screen and (max-width: 1000px) {
    .pc {
        visibility: collapse;
	    line-height: 0;
    }

    .mobile {
        visibility: visible;
	    line-height: 1.2;
        margin-top: -28%;
    }
}

@media only screen and (min-width: 871px) and (max-width: 935px) {
    .mobile {
        margin-top: -45%;
    }
}

@media only screen and (min-width: 821px) and (max-width: 870px) {
    .mobile {
        margin-top: -49%;
    }
}

@media only screen and (min-width: 761px) and (max-width: 820px) {
    .mobile {
        margin-top: -52%;
    }
}

@media only screen and (min-width: 701px) and (max-width: 760px) {
    .mobile {
        margin-top: -57%;
    }
}

@media only screen and (min-width: 641px) and (max-width: 700px) {
    .mobile {
        margin-top: -62%;
    }
}

@media only screen and (min-width: 581px) and (max-width: 640px) {
    .mobile {
        margin-top: -68%;
    }
}

@media only screen and (min-width: 521px) and (max-width: 580px) {
    .mobile {
        margin-top: -76%;
    }
}

@media only screen and (min-width: 461px) and (max-width: 520px) {
    .mobile {
        margin-top: -85%;
    }
}

@media only screen and (min-width: 401px) and (max-width: 460px) {
    .mobile {
        margin-top: -96%;
    }
}
@media only screen and (min-width: 341px) and (max-width: 400px) {
    .mobile {
        margin-top: -112%
    }
}

@media only screen and (min-width: 891px) and (max-width: 930px) {
    .input_button {
        font-size: 95%;
        margin-bottom: 5%;
    }
}

@media only screen and (min-width: 851px) and (max-width: 890px) {
    .input_button {
        font-size: 90%;
        margin-bottom: 5%;
    }
}

@media only screen and (min-width: 1px) and (max-width: 850px) {
    .input_button {
        font-size: 85%;
        margin-bottom: 5%;
    }
}