:root {
    --primary: #1e282d;
    --primary-text: #e8e6e3;
    --primary-dark: #00080e;
    --primary-light: #4f5b62;
    --tertiary: #1d2021;
    --tertiary-dark: #292c2e;
}

* {
    box-sizing: border-box;
}

html {
    background-color: var(--tertiary-dark);
    color-scheme: dark;
}

a {
    color: var(--primary-text);
}

a:hover {
    text-decoration: none;
}

body {
    font-family: 'Helvetica', sans-serif;
    font-size: 16px;
    line-height: 22px;
}

.wrapper {
    box-sizing: border-box;
    margin: 0 auto;
    max-width: 880px;
    width: 100%;
}

.box {
    background-color: var(--tertiary);
    margin-top: 10px;
}

.box > div,
.box > form {
    color: var(--primary-text);
    display: table;
    overflow: hidden;
    padding: 20px;
    width: 100%;
}

.box > h3 {
    color: var(--primary-text);
    background-color: var(--primary-dark);
}

header,
footer {
    padding: 20px;
    cursor: default;
}

header {
    color: var(--primary-text);
    background: var(--primary);
}

header h1 {
    font-size: 30px;
    line-height: 36px;
    word-break: break-all;
}

header h1 a {
    color: var(--primary-text);
    text-decoration: none;
}

header p {
    font-size: 14px;
    color: var(--primary-text);
}

header h2 {
    font-size: 20px;
    line-height: 26px;
    color: var(--primary-text);
}

main h3 {
    font-size: 18px;
    line-height: 22px;
    padding: 10px 20px;
}

main > p {
    padding: 10px 0;
}

main .join label {
    display: inline-block;
    width: 150px;
}

main .infos > div > div {
    display: table-row;
}

main .infos label,
main .infos span {
    display: table-cell;
}

main .join select,
main .join input {
    background-color: var(--tertiary-dark);
    border: 1px solid gray;
    border-radius: 0;
    width: 144px;
    -webkit-appearance: none;
}

main .join > form > div {
    display: table-row;
}

main .join input[name="additional"] {
    text-align: right;
}

main .join .participate {
    width: 100%;
}

main .join .participate > * {
    background-color: var(--primary);
    color: var(--primary-text);
    border: none;
    margin: 5px 5px 0 0;
    padding: 5px;
    width: calc((100% - 2 * 5px) / 3);
    display: table-cell;
}

main .join .participate > *:last-child {
    margin-right: 0;
}

table {
    border-collapse: collapse;
    width: 100%;
}

th, td {
    padding: 5px 10px;
    text-align: right;
}

tr:nth-of-type(2n+1) {
    background: none repeat scroll 0 0 #e9e9e9;
}

th:first-child, td:first-child {
    text-align: left;
}

th + th, td + td {
    border-left: 1px solid #808080;
}

thead {
    border-bottom: 1px solid #808080;
}

tfoot {
    border-top: 1px solid #808080;
}


@media only screen and (max-device-width: 900px) {
    main table {
        font-size: 14px;
    }
}

@media only screen and (max-device-width: 800px) {
    main table {
        font-size: 12px;
    }
}

@media only screen and (max-device-width: 700px) {

    main table {
        font-size: medium;
    }

    thead {
        border-bottom: none;
    }

    table, thead, tbody, tfoot, th, td, tr {
        display: block;
    }

    td + td {
        border-left: none;
        border-top: 1px solid #e9e9e9;
    }


    tr:nth-of-type(2n+1) td + td {
        background: none repeat scroll 0 0 #e9e9e9;
        border-top: 1px solid #d3d3d3;
    }

    thead tr {
        position: absolute;
        top: -9999px;
        left: -9999px;
    }

    td {
        border: none;
        position: relative;
        padding-left: 50%;
    }

    td:before {
        position: absolute;
        top: 5px;
        left: 10px;
        padding-right: 10px;
        white-space: nowrap;
    }

    td:first-child {
        font-weight: 700;
        padding-left: 10px;
    }
}

@media only screen and (max-device-width: 480px) {
    main label,
    main .infos > div,
    main .infos > div > div,
    main .join > form,
    main .join > form > div,
    main .join input,
    main .join select,
    main .join label,
    main .infos label {
        width: 100%;
        display: block;
    }

    main .infos > div > div + div,
    main .join > form > div + div {
        margin-top: 10px;
    }

    main .join .participate > * {
        display: block;
        width: 100%;
    }

    main .infos > div {
        margin-bottom: 10px;
    }
}