body {
    margin: 0;
    background-color: antiquewhite;
    background-image: url('./background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 100vh;
    height: 100dvh;
    font-family: Arial, Helvetica, sans-serif;
    background-attachment: fixed;
}

header {
    margin-top: 64px;
    background-color: rgba(255,255,255,0.9);
}

a {
    color: black;
}

h1, h2 {
    text-align: center;
}

header p {
    width: 100%;
    text-align: center;
    font-size: 64px;
    font-weight: bold;
    margin: 0;
}

header a {
    width: 100%;
    display: block;
    text-align: center;
    font-size: 32px;
    font-weight: bold;
    margin: 0;
    padding-bottom: 32px;
}

iframe {
    width: 450px;
    height: 300px;
}

.header-logo1 {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 128px;
}

.header-logo1 img {
    height: 192px;
    margin: 32px;
}

.header-logo2 {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
}

.header-logo2 img {
    height: 6.67vw;
    margin: 8px;
}

.contents {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.panel {
    background-color: rgba(255,255,255,0.8);
    padding: 16px;
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 900px;
    text-align: justify;
}

.panel:hover {
    background-color: rgba(255,255,255,0.95);
}

.panel b, .panel i {
    text-align: center;
}

.first-panel {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 64px;
}

.first-panel-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: justify;
}

.first-panel-info img {
    height: 128px;
}

#harmonogram p {
    width: 100%;
    text-align: left;
}

.ap {
    width: 100%;
    display: flex;
    gap: 16px;
}

#ap {
    width: 30%;
}

@media screen and (max-width: 1300px) {
    .first-panel {
        display: flex;
        flex-direction: column;
        gap: 32px;
    }

    .first-panel-info {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: justify;
    }
}

@media screen and (max-width: 1100px) {
    .header-logo1 {
        gap: 16px;
    }

    .header-logo1 img {
        height: 17vw;
        margin: 8px;
    }
}

@media screen and (max-width: 1000px) {
    .panel {
        max-width: 90%;
    }
}

@media screen and (max-width: 850px) {
    iframe {
        width: 52.9vw;
        height: 35.3vw;
    }

    .ap {
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    #ap {
        width: 256px;
    }
}

@media screen and (max-width: 600px) {
    header p {
        font-size: 32px;
    }
}