:root {
    --font-sans: "Noto Sans JP", -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    --color-text: #212529;
    --color-muted: #6c757d;
    --color-accent: #2f7edf;
    --color-dark: #343a40;
    --color-border: #e9ecef;
    --panel-bg: rgba(33, 37, 41, 0.9);

    font-size: 16px;
    line-height: 26px;
}

body,
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-sans);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin-bottom: 1rem;
}

h1 {
    font-size: 1.9rem;
}

h2 {
    margin-top: 3rem;
    margin-bottom: 2rem;
    font-size: 1.6rem;
}

h3 {
    margin-top: 3rem;
    margin-bottom: 2rem;
    font-size: 1.3rem;
}

h4,
h5,
h6 {
    color: #000;
    margin-top: 1rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

p {
    text-align: justify;
}

img {
    width: auto;
}

a img {
    border: 0;
    text-decoration: none;
}

@media (min-width: 768px) {
    h1 {
        font-size: 1.9rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    h4,
    h5,
    h6 {
        font-size: 1.1rem;
    }
}

.bg-darkest {
    background-color: var(--color-text);
}

.nav-item {
    font-size: 0.9rem;
}

.navbar-brand {
    font-family: "PT Sans Narrow", sans-serif;
}

.fa-twitter-square,
.fa-facebook-square,
.fa-instagram {
    color: var(--color-dark);
}

.fa-left {
    margin-right: 8px;
}

.fa-right {
    margin-left: 8px;
}

.os-Nav .os-Nav_Social {
    font-size: 1.2rem;
    margin-top: 0;
    padding: 0;
}

@media (min-width: 768px) {
    .os-Nav .os-Nav_Social {
        margin-top: 0.2rem;
    }
}

.os-Hero {
    color: #fff;
}

.os-Hero p {
    margin: 0;
    padding: 0;
    line-height: 1;
}

.os-Hero .os-Hero_Main {
    margin-top: 4rem;
}

.os-Hero .os-Tagline,
.os-Hero .os-Header {
    display: inline-block;
    margin: 0;
    background-color: var(--panel-bg);
    padding: 0.5rem;
}

.os-Hero .os-Tagline_Text {
    font-size: 0.9rem;
    line-height: 1.1;
}

.os-Hero .os-Header {
    font-weight: 100;
}

.os-Hero .os-Header_Title {
    margin-bottom: 1rem;
    font-size: 1.8rem;
    font-weight: 100;
}

.os-Hero .os-Header_Date {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.os-Hero .os-Header_Venue {
    font-size: 1rem;
}

.os-Hero .os-Hero_Button {
    width: 100%;
    max-width: 100%;
    border-radius: 2rem;
    margin: 0;
    padding: 0;
    line-height: 3;
    opacity: 0.9;
}

.os-HeroImage {
    display: table;
    width: 100%;
    height: 400px;
    min-height: 100%;
    padding: 0;
    background-repeat: no-repeat;
    background-position: center center;
    background-attachment: scroll;
    background-size: cover;
    opacity: 1;
}

.os-Content {
    padding-top: 1rem;
    padding-bottom: 1rem;
}

.os-Content .os-Share_Buttons {
    text-align: center;
    line-height: 1;
}

.os-Content .os-Share_Buttons button,
.os-Content .os-Share_Buttons iframe {
    margin: 0;
    padding: 0;
}

.os-Content .os-Content_Heading-Primary {
    color: var(--color-text);
}

.os-Content .os-Content_Heading-Secondary {
    color: var(--color-accent);
}

.os-Content .os-Content_Heading-Center {
    text-align: center;
    margin-bottom: 4rem;
}

.os-Content .os-Content_Images-Circle,
.os-Content .os-Content_Avator-Circle {
    border: 1px solid var(--color-border);
    margin-bottom: 1rem;
}

.os-Content .os-Content_Avator-Circle {
    border-radius: 50%;
}

@media (min-width: 768px) {
    .os-Content .os-Content_Description {
        display: flex;
        flex-wrap: wrap;
        flex: 1 0 auto;
        align-items: stretch;
        width: 100%;
    }
}

.os-Content .os-Content_Description dt {
    flex-basis: 15%;
    margin-bottom: 0.5rem;
    padding: 0;
}

.os-Content .os-Content_Description dd {
    flex-basis: 85%;
    margin-bottom: 0.5rem;
    padding: 0;
}

.os-Content .os-Feature_Name {
    font-size: 0.95em;
    color: var(--color-text);
}

.os-Content .os-Feature_Summary {
    font-size: 0.9em;
    color: var(--color-muted);
}

.os-Content .os-Title_Header {
    text-align: left;
}

@media (min-width: 768px) {
    .os-Content .os-Title_Header {
        text-align: center;
    }
}

.os-Content .os-Title_Lead {
    font-size: 1.1rem;
    font-weight: 300;
    color: #495057;
    margin: 2rem 0;
    text-align: justify;
}

.os-Content .os-Access_Map {
    width: 100%;
    height: 400px;
    overflow: hidden;
}

.os-Content .os-Access_Map iframe {
    min-height: 400px;
    max-height: 400px;
}

.os-Content .os-Access_Caption {
    text-align: left;
    color: #495057;
    margin: 1rem 0;
}

@media (min-width: 768px) {
    .os-Content .os-Access_Caption {
        text-align: center;
    }
}

.os-Content .os-TimeTable_Link,
.os-Content .os-Registration_Link {
    text-align: center;
    margin: 1rem 0;
}

.os-Content .os-Registration_Button {
    width: 100%;
    max-width: 100%;
    border-radius: 2rem;
    padding: 0 1rem;
    line-height: 3;
}

.os-Content .os-Social_Links {
    text-align: center;
    margin: 1rem 0;
}

.os-Content .os-Social_Links p {
    text-align: center;
}

.os-Content .os-Social_Links a {
    color: var(--color-muted);
    font-size: 1.5rem;
}

.os-Content .os-Support_Header a {
    color: var(--color-dark);
}

.os-Content .os-Support_Links {
    color: #adb5bd;
    font-size: 0.9rem;
}

.os-Content .os-Support_Links a {
    color: var(--color-muted);
}

.os-Footer {
    padding-top: 1.5rem;
    color: var(--color-muted);
    background-color: #ced4da;
}

.os-Footer h4 {
    margin-top: 0;
}

.os-Footer a {
    color: var(--color-muted);
}

.os-Footer a:hover,
.os-Footer a:visited {
    color: var(--color-accent);
}

.os-Footer .os-Footer_Address {
    margin: 0;
    padding: 0;
    font-size: 0.8rem;
}

.os-Footer .os-Footer_Address dt {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.os-Footer .os-Footer_Address dd {
    margin-bottom: 0.2rem;
    padding: 0;
    line-height: 1.1;
}

.os-Footer .os-Footer_Links {
    font-size: 0.9rem;
}