* {
  box-sizing: border-box;
}

body {
  background-color: #ebebeb;
    color: #1f2937;
    line-height: 1.4;
    overflow-x: hidden;
    font-family: 'Trebuchet MS', Helvetica, sans-serif;
    font-size: 16px;
    margin: 0;
}

.wrap {
    max-width: 900px;
    margin: 15px auto;
    padding: 60px 30px 50px 30px;
    background: #fff;
    border-radius: 10px;
}

.wrap img {
    object-fit: contain;
    width: 50%;
}

.back {
    background: #e7f2f9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000248;
    text-decoration: none;
    height: 44px;
    border-radius: 10px;
    font-weight: 400;
    border: 1px solid #cfcfcf;
    width: 100px;
    margin-bottom: 50px;
}

.back:hover {
    background: #cce5f5;
}

img {
    width: 100%;
    object-fit: cover;
}

.top-block {
    max-width: 1300px;
    margin: 15px auto;
    background: #ffffff;
    padding: 10px 20px;
    border-radius: 10px;
    border: 1px solid #cdcdcd;
    display: flex;
    justify-content: flex-end;
}

.donntu {
    display: flex;
    flex-direction: row;
    gap: 20px;
}

.donntu a {
    color: #333;
    text-decoration: none;
    font-size: 18px;
}

.donntu a:hover {
    color: #7c7c7c;
}

.intro {
    max-width: 1300px;
    margin: 15px auto;
    background: #ffffff;
    padding: 40px 50px;
    border-radius: 10px;
    border: 1px solid #cdcdcd;
}

.intro-block {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 100px;
}

.intro-img {
    width: 20%;
    border: 1px solid #cdcdcd;
    border-radius: 10px;
}

.intro-img img {
    border-radius: 10px;
}

.intro-rez {
    width: 80%;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

h1 {
    margin: 10px 0;
    line-height: 1;
    font-size: 40px;
}

.meta {
    font-size: 20px;
}

.work {
    font-weight: 600;
    color: #333333;
}

.link {
    color: #333333;
    text-decoration: underline;
}

.link:hover {
    color: #7c7c7c;
}

.content {
    max-width: 1300px;
    margin: 15px auto;
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    position: relative;
    gap: 15px;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    background: #ffffff;
    padding: 20px 25px;
    border-radius: 10px;
    border: 1px solid #cdcdcd;
    width: 25%;
    gap: 10px;
}

.button-menu {
    background: #e7f2f9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000248;
    text-decoration: none;
    height: 44px;
    border-radius: 10px;
    font-weight: 400;
    border: 1px solid #cfcfcf;
}

.button-menu:hover {
    background: #cce5f5;
}

.single {
    background: #ffffff;
    padding: 20px 25px;
    border-radius: 10px;
    border: 1px solid #cdcdcd;
    width: 75%;
}

td.label {
    background: #f3f4f6;
    font-weight: 600;
}

td {
    border: 1px solid #e5e7eb;
    padding: 8px 12px;
    vertical-align: top;
    width: 50%;
}

.video-block video {
    width: 50%;
    height: 100%;
    border-radius: 8px;
}

.video-block {
    margin: 20px 0;
}

.footer {
    max-width: 1300px;
    margin: 15px auto;
    background: #fff;
    padding: 10px 20px;
    border-radius: 10px;
    border: 1px solid #cdcdcd;
    display: flex;
    justify-content: center;
}

.nav-footer {
    display: flex;
    flex-direction: row;
    gap: 20px;
}

.button-footer {
    background: #e7f2f9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000248;
    text-decoration: none;
    height: 44px;
    border-radius: 10px;
    font-weight: 400;
    border: 1px solid #cfcfcf;
    width: 260px;
}

.button-footer:hover {
    background: #cce5f5;
}

.sp {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.toc-level-1 {
    color: #1f2937;
    font-weight: 600;
    text-decoration: none;
}

.toc-level-2 {
    color: #1f2937;
    font-weight: 400;
    text-decoration: none;
    padding-left: 10px;
}

.toc-level-3 {
    color: #1f2937;
    font-weight: 400;
    text-decoration: none;
    padding-left: 20px;
}

.sp a:hover {
    opacity: 0.7;
}

h2 {
    font-size: 30px;
    margin: 10px 0;
}

h3 {
    font-size: 24px;
    margin: 10px 0;
}

.publication {
    border: 1px solid #1f293736;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.h3 {
    color: #1f2937;
    font-size: 24px;
    font-weight: 700;
    text-decoration: none;
    line-height: 1;
}

.h3:hover {
    opacity: 0.7;
}


@media (max-width: 767px) {
    .content {
    margin: 15px 15px;
    flex-direction: column;
}

.h3 {
    font-size: 18px;
}

.intro-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 30px;
}

.intro {
    margin: 15px 15px;
    padding: 25px 20px;
}

.intro-img {
    width: 100%;
}

.top-block {
    margin: 15px 15px;
}

.intro-rez {
    width: 100%;
}

.nav-menu {
    width: 100%;
}

.single {
    width: 100%;
    padding: 20px 15px;
}

.video-block video {
    width: 100%;
}

.footer {
    margin: 15px 15px;
}

.nav-footer {
    flex-direction: column;
    gap: 10px;
}

h1 {
    font-size: 30px;
}

.meta {
    font-size: 18px;
}

td {
    padding: 8px 8px;
    font-size: 12px;
}

.donntu a {
    color: #333;
    text-decoration: none;
    font-size: 16px;
}

h2 {
    font-size: 24px;
    margin: 10px 0;
}

h3 {
    font-size: 20px;
    margin: 10px 0;
}

.tab {
    overflow: scroll;
}

ol, ul {
    padding-left: 20px;
}

body {
    font-size: 15px;
}


}