@charset "UTF-8";

:root {
  --letter-bg: #f5f3ec;
  --letter-surface: #fffdf8;
  --letter-text: #183a32;
  --letter-muted: #5d6d63;
  --letter-border: #dce2d8;
  --letter-accent: #173f35;
  --letter-lime: #d7eb91;
  --letter-width: 1120px;
  --letter-reading: 760px;
}

html {
  scroll-behavior: smooth;
}

body,
button,
input,
select,
table,
textarea {
  color: var(--letter-text);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
}

body {
  background: var(--letter-bg);
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
.letter-table-scroll:focus-visible {
  outline: 3px solid rgba(23, 63, 53, .28);
  outline-offset: 3px;
}

#container,
.menu_on #container {
  position: relative;
  left: 0;
  min-height: 100vh;
  background: var(--letter-bg);
  transition: none;
}

#header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--letter-border);
  background: rgba(245, 243, 236, .96);
  backdrop-filter: blur(12px);
}

.inner_header {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: var(--letter-width);
  height: 88px;
  margin: 0 auto;
  padding: 0;
  text-align: left;
}

.inner_header .logo {
  display: flex;
  flex: 0 1 auto;
  justify-content: flex-start;
  min-width: 0;
  width: auto;
  height: 100%;
  margin: 0 auto 0 0;
}

.inner_header .link_logo {
  display: flex;
  align-items: center;
  width: auto;
  gap: 11px;
  min-width: 170px;
  height: 100%;
  background-position: left center;
  background-size: auto 52px;
}

.inner_header .title_text {
  display: block;
  max-width: 210px;
  margin: 0;
  color: var(--letter-text);
  font-size: 22px;
  font-weight: 750;
  letter-spacing: -.03em;
  text-align: left;
}

.logo_symbol {
  display: block;
  flex: 0 0 34px;
  width: 34px;
  height: 34px;
  padding: 0;
  background: url(rian-ai-logo.svg) center / contain no-repeat;
  box-sizing: border-box;
}

.logo_symbol span {
  display: none;
}

.logo_wordmark {
  display: block;
  min-width: 0;
}

.logo_tagline {
  display: block;
  margin-top: 3px;
  color: var(--letter-muted);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .15em;
  line-height: 1;
}

.header_blog_menu {
  min-width: 0;
}

.header_blog_menu > ul {
  display: flex;
  align-items: center;
  gap: 22px;
}

.header_blog_menu a {
  display: flex;
  align-items: center;
  min-height: 44px;
  color: var(--letter-muted);
  font-size: 14px;
  font-weight: 650;
}

.header_blog_menu a:hover {
  color: var(--letter-accent);
}

.inner_header .btn_menu,
.inner_header .btn_search {
  position: static;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  width: auto;
  min-width: 44px;
  height: 44px;
  margin: 0;
  padding: 0 10px;
  border-radius: 8px;
  color: var(--letter-text);
  font-size: 14px;
  line-height: 1;
}

.inner_header .btn_menu:hover,
.inner_header .btn_search:hover {
  background: #e8ebe1;
}

.inner_header .btn_menu > [class^="icon-"],
.inner_header .btn_search > [class^="icon-"] {
  font-size: 20px;
}

.button_label {
  font-weight: 650;
}

.inner_header .area_search {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: min(360px, calc(100vw - 40px));
  height: auto;
  margin: 0;
  padding: 10px 52px 10px 14px;
  border: 1px solid var(--letter-border) !important;
  border-radius: 12px;
  background: var(--letter-surface);
  box-shadow: 0 12px 35px rgba(24, 35, 47, .12);
  box-sizing: border-box;
}

.inner_header .area_search .inp_search {
  width: 100%;
  height: 36px;
  background: transparent;
  color: var(--letter-text);
  font-size: 16px;
  outline: none;
}

.inner_header .area_search .btn_search_del {
  position: absolute;
  top: 9px;
  right: 9px;
  width: 44px;
  height: 44px;
  background: url(ico_close.png) no-repeat center;
  cursor: pointer;
}

.area_menu {
  position: fixed;
  top: 88px;
  bottom: 0;
  left: 0;
  z-index: 30;
  width: min(380px, 90vw);
  height: auto;
  padding: 34px 34px 50px;
  border: 0;
  border-right: 1px solid var(--letter-border);
  background: var(--letter-surface);
  box-shadow: 14px 0 40px rgba(23, 63, 53, .1);
  box-sizing: border-box;
  overflow-y: auto;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-24px);
  transition: opacity .18s ease, transform .18s ease, visibility 0s linear .18s;
}

.menu_on .area_menu {
  left: 0;
  height: auto;
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
  transition-delay: 0s;
}

.area_menu nav,
.area_menu .list_sns,
.area_menu .box_visit {
  padding-left: 0;
}

.area_menu nav {
  padding-top: 0;
}

.area_menu .list_gnb .link_gnb,
.area_menu .link_lnb {
  min-height: 44px;
  box-sizing: border-box;
  color: var(--letter-text);
}

.area_menu .list_gnb .list_lnb {
  margin-left: 8px;
  border-left: 2px solid var(--letter-border);
}

.area_menu .list_sns {
  display: flex;
  gap: 6px;
  padding-top: 34px;
}

.area_menu .list_sns li,
.area_menu .list_sns li:first-child {
  float: none;
  margin: 0;
}

.area_menu .list_sns .link_sns {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  height: 44px;
  border: 1px solid var(--letter-border);
  border-radius: 50%;
}

.area_menu .list_sns .link_threads {
  width: auto;
  padding: 0 14px;
  border-radius: 22px;
  color: var(--letter-text);
  font-size: 13px;
  font-weight: 700;
}

.area_menu .box_visit {
  padding-top: 20px;
  color: var(--letter-muted);
}

.inner_index {
  max-width: var(--letter-width);
  margin: 0 auto;
  padding: 0;
  overflow: visible;
}

body#tt-body-page .inner_index > .category_list {
  margin-top: 0;
}

.letter_intro {
  display: none;
}

body#tt-body-index .letter_intro {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(380px, 2fr);
  min-height: 420px;
  margin-top: 32px;
  padding: 0;
  border: 1px solid var(--letter-border);
  border-radius: 24px;
  background: #f8f6ef;
  box-sizing: border-box;
  overflow: hidden;
}

body#tt-body-index.letter-not-home .letter_intro {
  display: none;
}

.letter_intro .eyebrow {
  margin-bottom: 22px;
  color: var(--letter-accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: -.01em;
}

.letter_intro .intro_main {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: auto;
  padding: 44px;
  box-sizing: border-box;
}

.letter_intro h1 {
  max-width: 520px;
  color: var(--letter-text);
  font-size: clamp(52px, 5vw, 58px);
  line-height: 1.08;
  letter-spacing: -.06em;
  overflow-wrap: anywhere;
  word-break: keep-all;
}

.letter_intro .intro_description {
  max-width: 510px;
  margin-top: 22px;
  color: var(--letter-muted);
  font-size: 17px;
  line-height: 1.7;
  overflow-wrap: anywhere;
  word-break: keep-all;
}

.letter_intro .intro_description_line {
  display: block;
}

.letter_intro .intro_link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  min-height: 48px;
  margin-top: 28px;
  padding: 0 20px;
  border-radius: 24px;
  background: var(--letter-accent);
  color: #fffdf8;
  font-size: 15px;
  font-weight: 750;
  text-decoration: none;
}

.letter_intro .intro_link span {
  margin-left: 8px;
  font-size: 17px;
  transition: transform .18s ease;
}

.letter_intro .intro_link:hover span {
  transform: translate(2px, -2px);
}

.intro_art {
  position: relative;
  min-width: 0;
  background-color: var(--letter-accent);
  background-image:
    linear-gradient(rgba(215, 235, 145, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(215, 235, 145, .08) 1px, transparent 1px);
  background-size: 32px 32px;
  color: #fffdf8;
  overflow: hidden;
}

.art_orbit {
  position: absolute;
  left: 50%;
  top: 47%;
  border: 1px solid rgba(215, 235, 145, .32);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit_one {
  width: 270px;
  height: 270px;
}

.orbit_two {
  width: 182px;
  height: 182px;
  border-style: dashed;
}

.art_dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--letter-lime);
  box-shadow: 0 0 0 5px rgba(215, 235, 145, .12);
}

.dot_one {
  left: 16%;
  top: 25%;
}

.dot_two {
  right: 17%;
  top: 37%;
}

.dot_three {
  left: 42%;
  bottom: 18%;
}

.art_flow {
  position: absolute;
  left: 50%;
  top: 34px;
  display: flex;
  gap: 8px;
  align-items: center;
  color: rgba(255, 253, 248, .72);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .12em;
  white-space: nowrap;
  transform: translateX(-50%);
}

.art_flow i {
  color: var(--letter-lime);
  font-style: normal;
}

.art_mark {
  position: absolute;
  z-index: 1;
  left: 50%;
  top: 48%;
  display: block;
  width: 74px;
  height: 74px;
  padding: 0;
  border: 0;
  background: url(rian-ai-avatar.svg) center / contain no-repeat;
  box-sizing: border-box;
  transform: translate(-50%, -50%) rotate(7deg);
}

.art_mark span {
  display: none;
}

.art_note {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 152px;
  min-height: 78px;
  padding: 15px 17px;
  border: 1px solid rgba(23, 63, 53, .16);
  border-radius: 12px;
  background: #fffdf8;
  box-shadow: 0 16px 32px rgba(7, 28, 23, .22);
  box-sizing: border-box;
  color: var(--letter-text);
}

.art_note b {
  color: var(--letter-muted);
  font-size: 10px;
  letter-spacing: .12em;
}

.art_note span {
  font-size: 13px;
  font-weight: 750;
}

.note_one {
  left: 8%;
  top: 29%;
  transform: rotate(-5deg);
}

.note_two {
  right: 7%;
  bottom: 22%;
  transform: rotate(5deg);
}

.art_caption {
  position: absolute;
  right: 26px;
  bottom: 21px;
  color: rgba(255, 253, 248, .68);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .15em;
}

.letter_home_topics,
.letter_home_heading {
  display: none;
}

body#tt-body-index:not(.letter-not-home) .letter_home_topics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 20px;
  border: 1px solid var(--letter-border);
  border-radius: 16px;
  background: rgba(255, 253, 248, .62);
}

.letter_home_topics > div {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  min-width: 0;
  padding: 20px 22px;
  box-sizing: border-box;
}

.letter_home_topics > div + div {
  border-left: 1px solid var(--letter-border);
}

.letter_home_topics b {
  grid-row: 1 / span 2;
  color: var(--letter-accent);
  font-size: 11px;
  letter-spacing: .08em;
}

.letter_home_topics strong {
  font-size: 15px;
}

.letter_home_topics span {
  color: var(--letter-muted);
  font-size: 12px;
  line-height: 1.5;
}

body#tt-body-index:not(.letter-not-home) .letter_home_heading {
  display: block;
  margin-top: 72px;
}

.letter_home_heading p {
  margin-bottom: 9px;
  color: var(--letter-accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .1em;
}

.letter_home_heading h2 {
  color: var(--letter-text);
  font-size: 30px;
  line-height: 1.3;
  letter-spacing: -.035em;
}

body#tt-body-index:not(.letter-not-home) .category_list > .title_category {
  display: none;
}

#letter-posts {
  scroll-margin-top: 110px;
}

.index_type_common,
.related_type_index,
.box_tag_trail,
#localog {
  margin-top: 72px;
}

.index_type_common .title_category,
.related_type .title_related,
.box_tag_trail .title_category {
  margin-bottom: 24px;
  color: var(--letter-text);
  font-size: 15px;
  font-weight: 750;
  letter-spacing: -.01em;
}

.index_type_common .link_title {
  display: block;
  max-height: none;
  overflow: visible;
  -webkit-line-clamp: unset;
}

.index_type_horizontal .list_horizontal .list_horizontal_item,
.index_type_horizontal .article_content {
  margin-bottom: 0;
}

.index_type_horizontal .list_horizontal_item,
.index_type_horizontal > .article_content {
  padding: 30px 0;
  border-top: 1px solid var(--letter-border);
}

.index_type_horizontal .article_content {
  display: flex;
  align-items: flex-start;
}

.index_type_horizontal .thumbnail_zone,
.index_type_horizontal .thumbnail_post,
.index_type_horizontal .no-image {
  flex: 0 0 220px;
  float: none;
  width: 220px;
  height: 145px;
  margin: 0 30px 0 0;
  border-radius: 12px;
  background-color: #e8eadf;
  background-image: url(letter-placeholder.svg);
  background-position: center;
  background-size: cover;
  overflow: hidden;
}

.index_type_horizontal .thumbnail_zone .thumbnail_post {
  margin: 0;
}

.index_type_horizontal .box_contents {
  flex: 1 1 auto;
  min-width: 0;
}

.index_type_horizontal .title_post {
  display: -webkit-box;
  padding: 0;
  color: var(--letter-text);
  font-size: 24px;
  font-weight: 750;
  line-height: 1.4;
  letter-spacing: -.025em;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: keep-all;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.index_type_horizontal .info_post {
  margin-top: 9px;
  padding-bottom: 8px;
  color: var(--letter-muted);
  font-size: 13px;
}

.index_type_horizontal .txt_post {
  display: -webkit-box;
  max-height: none;
  margin: 0;
  color: var(--letter-muted);
  font-size: 15px;
  line-height: 1.65;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item {
  margin-bottom: 16px;
  padding: 0;
  border: 1px solid var(--letter-border);
  border-radius: 16px;
  background: var(--letter-surface);
  overflow: hidden;
}

.category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item > .article_content {
  padding: 22px;
}

.category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .link_title {
  max-height: none;
  overflow: visible;
  -webkit-line-clamp: unset;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal {
  margin-top: 24px;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item {
  min-width: 0;
  margin: 0;
  border-radius: 18px;
  box-shadow: 0 8px 24px rgba(23, 63, 53, .055);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:hover,
body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:focus-within {
  border-color: #c7d3c6;
  box-shadow: 0 14px 34px rgba(23, 63, 53, .1);
  transform: translateY(-3px);
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child {
  grid-column: 1 / -1;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item > .article_content {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child > .article_content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-height: 320px;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .thumbnail_zone {
  position: relative;
  flex: none;
  width: 100%;
  height: auto;
  margin: 0;
  aspect-ratio: 16 / 9;
  border-radius: 0;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child .thumbnail_zone {
  height: 100%;
  aspect-ratio: auto;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .thumbnail_zone .thumbnail_post {
  position: static;
  width: 100%;
  height: 100%;
  margin: 0;
  aspect-ratio: auto;
  border-radius: 0;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .box_contents {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  box-sizing: border-box;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child .box_contents {
  padding: 38px;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .title_post {
  font-size: 24px;
  line-height: 1.38;
  -webkit-line-clamp: 3;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .link_title {
  max-height: none;
  overflow: visible;
  -webkit-line-clamp: unset;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child .title_post {
  font-size: 32px;
  line-height: 1.3;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .info_post {
  margin-top: 12px;
  padding-bottom: 12px;
}

body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .txt_post {
  font-size: 15px;
  -webkit-line-clamp: 3;
}

.index_type_gallery .list_gallery {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 42px 24px;
  margin: 0;
}

.index_type_gallery .list_gallery > li,
.index_type_gallery .list_gallery > li:nth-child(odd),
.index_type_gallery .list_gallery > li:nth-child(even) {
  display: block;
  width: auto;
  margin: 0;
  padding: 0;
}

.index_type_gallery .thumbnail_zone,
.index_type_gallery .thumbnail_post {
  height: auto;
  padding-top: 0;
  aspect-ratio: 4 / 3;
  border-radius: 16px 16px 0 0;
  background-color: #e8eadf;
  background-image: url(letter-placeholder.svg);
  background-position: center;
  background-size: cover;
}

.index_type_gallery .title_post {
  max-height: none;
  margin: 16px 0 7px;
  color: var(--letter-text);
  font-size: 20px;
  font-weight: 750;
  line-height: 1.45;
  overflow: hidden;
  overflow-wrap: anywhere;
  word-break: keep-all;
  -webkit-line-clamp: 3;
}

.index_type_gallery .txt_post {
  display: -webkit-box;
  max-height: none;
  color: var(--letter-muted);
  font-size: 14px;
  line-height: 1.65;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.index_type_gallery .list_gallery > li .article_content {
  height: 100%;
  padding-bottom: 20px;
  border: 1px solid var(--letter-border);
  border-radius: 16px;
  background: var(--letter-surface);
  box-shadow: 0 7px 22px rgba(23, 63, 53, .045);
  box-sizing: border-box;
  overflow: hidden;
}

.index_type_gallery .list_gallery > li .link_title,
.index_type_gallery .list_gallery > li .info_post,
.index_type_gallery .list_gallery > li .link_article {
  margin-right: 20px;
  margin-left: 20px;
}

.index_type_gallery .list_gallery > li .link_article {
  display: block;
}

.index_type_gallery .list_gallery > li .link_title {
  max-height: none;
  overflow: visible;
  -webkit-line-clamp: unset;
}

.index_type_common .btn_area {
  padding-top: 34px;
}

.index_type_common .btn_post_more {
  min-width: 150px;
  height: 44px;
  border: 1px solid var(--letter-border);
  border-radius: 8px;
  background: var(--letter-surface);
  color: var(--letter-text);
  cursor: pointer;
}

.index_type_common .btn_more {
  display: none;
}

.index_type_post .info_post,
.related_type .link_related .txt,
.area_view_content .info_post,
.area_view_content .view_info_post,
.category_list .info_post,
.area_paging {
  font-family: inherit;
}

.area_view_content {
  max-width: 860px;
  margin: 0 auto;
  padding: 0;
}

.area_view_content .article_content {
  display: block;
  width: auto;
  margin: 0;
  padding: 64px 50px;
  border: 1px solid var(--letter-border);
  border-radius: 20px;
  background: var(--letter-surface);
  box-sizing: border-box;
}

.category_content_area .area_view_content {
  margin-top: 0;
  padding: 0;
}

.area_view_content .link_title {
  display: block;
  max-height: none;
  color: var(--letter-text);
  font-size: inherit;
  overflow: visible;
  -webkit-line-clamp: unset;
}

.area_view_content .title_view,
.area_view_content .title_post {
  margin: 0;
  color: var(--letter-text);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.38;
  letter-spacing: -.035em;
  overflow-wrap: anywhere;
  word-break: keep-all;
}

.area_view_content > .article_content > .info_post::before {
  content: "FIELD NOTES";
  display: none;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  color: var(--letter-accent);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: .16em;
  padding-left: 44px;
  background: linear-gradient(var(--letter-accent), var(--letter-accent)) left center / 34px 2px no-repeat;
}

.area_view_content .view_info_post,
.area_view_content .info_post > .category,
.area_view_content .info_post > .date {
  color: var(--letter-muted);
  font-family: inherit;
}

.area_view_content .view_info_post {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  width: 100%;
  margin-top: 18px;
  vertical-align: middle;
}

.area_view_content .view_info_post .link_category,
.area_view_content .info_post > .category {
  display: inline-flex;
  align-items: center;
  min-height: 0;
  max-width: 100%;
  padding: 0;
  border-radius: 0;
  background: none;
  color: var(--letter-accent) !important;
  font-size: 13px;
  font-weight: 600;
  text-decoration: none !important;
  overflow-wrap: anywhere;
  white-space: normal;
}

.area_view_content .view_info_post > .date,
.area_view_content .info_post > .date {
  margin-left: 0;
  padding-left: 0;
  background: none;
  color: var(--letter-muted);
  font-size: 12px;
}

.area_view_content .info_post {
  margin: 0;
  padding: 0;
}

.article_tools {
  display: none;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  min-width: 0;
  max-width: 100%;
  margin-top: 0;
  margin-left: auto;
  vertical-align: middle;
}

.js-enhanced .article_tools {
  display: inline-flex;
  margin-left: auto;
  vertical-align: middle;
}

.article_tools .letter-copy-link {
  min-height: 44px;
  padding: 0 0 0 10px;
  border: 0;
  background: transparent;
  color: var(--letter-text);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
}

.article_tools .letter-copy-link:hover {
  color: var(--letter-accent);
  text-decoration: underline;
}

.article_tools .letter-copy-link:focus-visible {
  outline: 3px solid rgba(23, 63, 53, .28);
  outline-offset: 3px;
}

.article_tools .letter-copy-status {
  display: inline;
  max-width: 100%;
  color: var(--letter-muted);
  font-size: 12px;
  overflow-wrap: anywhere;
}

.article_tools .letter-copy-status:empty {
  display: none;
}

.letter-toc {
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--letter-border);
  border-right: 0;
  border-bottom: 1px solid var(--letter-border);
  border-left: 0;
  border-radius: 0;
  background: transparent;
}

.letter-toc .toc_title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  margin: 0;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
  list-style: none;
}

.letter-toc .toc_title::-webkit-details-marker {
  display: none;
}

.letter-toc .toc_title::marker {
  content: "";
}

.letter-toc .toc_title::after {
  content: "";
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg);
}

.letter-toc[open] .toc_title::after {
  transform: rotate(225deg);
}

.letter-toc ol {
  margin: 0;
  padding: 0 0 16px;
  list-style: none;
}

.letter-toc li + li {
  margin-top: 8px;
}

.letter-toc li.toc_h3 {
  padding-left: 18px;
}

.letter-toc a {
  color: var(--letter-muted);
  font-size: 14px;
  line-height: 1.7;
}

.letter-toc a:hover {
  color: var(--letter-accent);
}

.article_content .article_view {
  margin-top: 52px;
  color: var(--letter-text);
  font-size: 18px;
  line-height: 1.85;
  overflow-wrap: anywhere;
}

#article-view {
  min-height: 0;
  margin-top: 52px;
  padding: 0 0 50px;
  color: var(--letter-text);
  font-family: inherit;
  font-size: 18px;
  line-height: 1.85;
}

#article-view p[data-ke-size] {
  font-size: inherit;
  line-height: inherit;
}

.letter-toc + #article-view,
.letter-toc + .article_view {
  margin-top: 28px;
}

.article_view p,
.article_view ul,
.article_view ol {
  margin: 1.15em 0;
}

.article_view h1,
.article_view h2,
.article_view h3,
.article_view h4 {
  color: var(--letter-text);
  font-weight: 780;
  letter-spacing: -.025em;
  scroll-margin-top: 118px;
}

.article_view h2,
#article-view h2,
#article-view h2[data-ke-size] {
  margin: 2.4em 0 .9em;
  padding: 12px 16px;
  border-left: 4px solid #24584a;
  border-radius: 0 8px 8px 0;
  background: linear-gradient(90deg, rgba(36, 88, 74, .07), rgba(36, 88, 74, .015));
  color: var(--letter-text);
  font-size: 28px;
  font-weight: 750;
  line-height: 1.45;
  letter-spacing: -.025em;
}

.article_view h3,
#article-view h3,
#article-view h3[data-ke-size] {
  margin: 1.9em 0 .75em;
  color: var(--letter-text);
  font-size: 22px;
  font-weight: 750;
  line-height: 1.5;
  letter-spacing: -.025em;
}

.article_view h4,
#article-view h4,
#article-view h4[data-ke-size] {
  margin: 1.6em 0 .65em;
  color: var(--letter-text);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -.025em;
}

.article_content .article_view a {
  color: var(--letter-accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

#article-view a {
  color: var(--letter-accent);
}

.article_view blockquote {
  margin: 1.8em 0;
  padding: 18px 22px;
  border: 0;
  border-left: 3px solid var(--letter-accent);
  background: #edf2e8;
  color: #405b52;
}

#article-view blockquote[data-ke-style] {
  margin: 1.8em 0;
  padding: 18px 22px;
  border: 0;
  border-left: 3px solid var(--letter-accent);
  background: #edf2e8;
  color: #405b52;
  font-family: inherit;
  font-size: 1em;
  line-height: 1.75;
  text-align: left;
}

.article_view pre {
  margin: 1.8em 0;
  padding: 20px;
  border-radius: 8px;
  background: #121923;
  color: #edf2f7;
  font-size: 14px;
  line-height: 1.65;
  overflow: auto;
}

.article_view .letter-code-block {
  box-sizing: border-box;
  min-width: 0;
  max-width: 100%;
  margin: 1.8em 0;
  border: 1px solid #343c49;
  border-radius: 12px;
  background: #1b2028;
  box-shadow: 0 8px 24px rgba(18, 25, 35, .10);
}

.article_view .letter-code-tools {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  box-sizing: border-box;
  min-width: 0;
  min-height: 44px;
  padding: 5px 12px;
  border-bottom: 1px solid #3b4350;
  border-radius: 11px 11px 0 0;
  background: #272e39;
}

.article_view .letter-code-tools::before {
  flex: 0 0 46px;
  width: 46px;
  height: 10px;
  margin-right: auto;
  background:
    radial-gradient(circle at 5px 5px, #ff5f57 0 5px, transparent 5.2px),
    radial-gradient(circle at 23px 5px, #febc2e 0 5px, transparent 5.2px),
    radial-gradient(circle at 41px 5px, #28c840 0 5px, transparent 5.2px);
  content: '';
}

.article_view .letter-copy-code {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  width: 32px;
  height: 32px;
  min-height: 32px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: #e4e9f0;
  font: inherit;
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
}

.article_view .letter-copy-code:hover {
  border-color: #515c6c;
  background: rgba(255, 255, 255, .08);
  color: #fff;
}

.article_view .letter-copy-code:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.article_view .letter-code-status {
  flex: 1 1 auto;
  min-width: 0;
  color: #c6cfda;
  font-size: 12px;
  line-height: 1.45;
  text-align: right;
  overflow-wrap: anywhere;
}

.article_view .letter-code-status:empty {
  display: none;
}

.article_view .letter-code-block > pre {
  margin: 0;
  padding: 20px 22px 22px;
  border-radius: 0 0 11px 11px;
  background: inherit;
  line-height: 1.8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow: auto;
}

#article-view .letter-code-block pre code.hljs {
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

@media (max-width: 480px) {
  .article_view .letter-code-tools {
    gap: 8px;
    padding: 5px 10px;
  }

  .article_view .letter-copy-code {
    width: 36px;
    height: 36px;
    min-height: 36px;
  }

  .article_view .letter-code-block > pre {
    padding: 18px 16px 20px;
  }
}

.letter-table-scroll {
  width: 100%;
  margin: 1.8em 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.article_view .letter-table-scroll table {
  min-width: 620px;
  margin: 0;
  border-collapse: collapse;
}

.article_view table th,
.article_view table td {
  padding: 12px 14px;
  border: 1px solid var(--letter-border);
  text-align: left;
}

.article_view table th {
  background: #e3eadf;
}

.sidebar {
  max-width: var(--letter-width);
  margin: 84px auto 0;
  border-top: 1px solid var(--letter-border);
}

.related_type .link_related {
  background-color: #dfe5da;
  background-image: url(letter-placeholder.svg);
}

.related_type .link_related .bg {
  background: var(--letter-accent);
  opacity: .76;
}

.sidebar .inner_sidebar {
  max-width: none;
  padding: 38px 0 0;
}

.sidebar .box_sidebar .inbox {
  padding: 0 24px 0 0;
}

.category_list .list_gallery .title_post {
  display: -webkit-box;
  width: auto;
  overflow: hidden;
  white-space: normal;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.box_sidebar .text_about,
.box_sidebar .link_slink {
  color: var(--letter-muted);
  font-size: 14px;
  line-height: 1.7;
}

#footer {
  max-width: var(--letter-width);
  margin: 0 auto;
  padding: 54px 0 38px;
  color: var(--letter-muted);
  text-align: left;
  border-top: 1px solid var(--letter-border);
}

@media screen and (max-width: 1120px) {
  .inner_header,
  .inner_index,
  .sidebar,
  #footer {
    margin-right: 32px;
    margin-left: 32px;
  }
}

@media screen and (min-width: 821px) {
  .pc_blind {
    display: none !important;
  }
}

@media screen and (max-width: 820px) {
  .inner_header {
    gap: 8px;
    height: 72px;
    margin-right: 20px;
    margin-left: 20px;
    padding: 0;
  }

  .inner_header .link_logo {
    gap: 8px;
    min-width: 0;
    background-size: auto 42px;
  }

  .inner_header .title_text {
    max-width: min(42vw, 158px);
    font-size: 17px;
  }

  .logo_symbol {
    flex-basis: 30px;
    width: 30px;
    height: 30px;
    padding: 0;
  }

  .logo_tagline {
    margin-top: 2px;
    font-size: 7px;
  }

  .header_blog_menu {
    display: none;
  }

  .button_label {
    position: absolute;
    overflow: hidden;
    clip: rect(0 0 0 0);
    width: 1px;
    height: 1px;
  }

  .inner_header .btn_menu,
  .inner_header .btn_search {
    padding: 0;
  }

  .inner_header .area_search {
    top: calc(100% + 8px);
    right: 0;
    width: calc(100vw - 40px);
  }

  .search_on .inner_index {
    margin-top: 0;
  }

  .area_menu {
    top: 72px;
    display: block;
    width: min(360px, 92vw);
    margin: 0;
    padding: 28px 20px 44px;
  }

  .menu_on .area_menu {
    position: fixed;
    height: auto;
  }

  .menu_on #container {
    position: relative;
  }

  .inner_index,
  .sidebar,
  #footer {
    margin-right: 20px;
    margin-left: 20px;
  }

  body#tt-body-index .letter_intro {
    grid-template-columns: 1fr;
    min-height: 0;
    margin-top: 20px;
    padding: 0;
    border-radius: 20px;
  }

  .letter_intro .intro_main {
    min-height: 0;
    padding: 24px;
  }

  .letter_intro h1 {
    max-width: 390px;
    font-size: clamp(36px, 10.5vw, 40px);
    line-height: 1.1;
  }

  .letter_intro .eyebrow {
    margin-bottom: 14px;
    font-size: 12px;
  }

  .letter_intro .intro_description {
    margin-top: 18px;
    font-size: 16px;
  }

  .letter_intro .intro_link {
    min-height: 44px;
    margin-top: 18px;
    padding: 0 17px;
  }

  .intro_art {
    min-height: 150px;
  }

  .art_flow {
    top: 16px;
  }

  .orbit_one {
    width: 210px;
    height: 210px;
  }

  .orbit_two {
    width: 132px;
    height: 132px;
  }

  .art_mark {
    left: 50%;
    top: 53%;
    width: 54px;
    height: 54px;
    padding: 0;
    border-radius: 13px;
  }

  .art_note {
    gap: 2px;
    width: 126px;
    min-height: 52px;
    padding: 9px 11px;
  }

  .art_note b {
    font-size: 8px;
  }

  .art_note span {
    font-size: 11px;
  }

  .note_one {
    left: 5%;
    top: 35%;
  }

  .note_two {
    right: 4%;
    bottom: 12%;
  }

  .art_caption {
    display: none;
  }

  body#tt-body-index:not(.letter-not-home) .letter_home_topics {
    margin-top: 14px;
    border-radius: 14px;
  }

  .letter_home_topics > div {
    display: flex;
    flex-direction: column;
    gap: 5px;
    align-items: center;
    padding: 14px 8px;
    text-align: center;
  }

  .letter_home_topics b {
    font-size: 9px;
  }

  .letter_home_topics strong {
    font-size: 12px;
    word-break: keep-all;
  }

  .letter_home_topics span {
    display: none;
  }

  body#tt-body-index:not(.letter-not-home) .letter_home_heading {
    margin-top: 52px;
  }

  .letter_home_heading h2 {
    font-size: 26px;
  }

  .index_type_common,
  .related_type_index,
  .box_tag_trail,
  #localog {
    margin-top: 54px;
    padding: 0;
  }

  .index_type_horizontal .list_horizontal_item,
  .index_type_horizontal > .article_content {
    padding: 22px 0;
  }

  .index_type_horizontal .article_content {
    position: relative;
    display: block;
    min-height: 96px;
    padding-right: 116px;
  }

  .index_type_horizontal .thumbnail_zone,
  .index_type_horizontal .thumbnail_post,
  .index_type_horizontal .no-image {
    position: absolute;
    top: 22px;
    right: 0;
    float: none;
    width: 96px;
    height: 96px;
    margin: 0;
  }

  .index_type_horizontal .thumbnail_zone .thumbnail_post {
    top: 0;
  }

  .index_type_horizontal .title_post {
    font-size: 18px;
    line-height: 1.45;
    -webkit-line-clamp: 3;
  }

  .index_type_horizontal .txt_post {
    font-size: 14px;
    -webkit-line-clamp: 2;
  }

  .index_type_horizontal .area_view_content .article_content {
    min-height: 0;
    margin-right: -20px;
    margin-left: -20px;
    padding: 32px 20px 52px;
  }

  .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item > .article_content {
    padding: 22px 132px 22px 22px;
  }

  .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item > .article_content > .thumbnail_zone {
    top: 22px;
    right: 16px;
  }

  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child {
    grid-column: auto;
  }

  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item > .article_content,
  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child > .article_content {
    display: flex;
    min-height: 0;
    padding: 0;
  }

  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .thumbnail_zone,
  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child .thumbnail_zone {
    position: relative;
    top: auto;
    right: auto;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
  }

  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .box_contents,
  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child .box_contents {
    padding: 20px;
  }

  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item .title_post,
  body#tt-body-index:not(.letter-not-home) .category_list.index_type_horizontal > .list_horizontal > .list_horizontal_item:first-child .title_post {
    font-size: 22px;
    line-height: 1.4;
  }

  .index_type_gallery .list_gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 14px;
  }

  .index_type_gallery .title_post {
    max-height: none;
    margin-top: 12px;
    font-size: 17px;
  }

  .index_type_gallery .list_gallery > li .link_title,
  .index_type_gallery .list_gallery > li .info_post,
  .index_type_gallery .list_gallery > li .link_article {
    margin-right: 14px;
    margin-left: 14px;
  }

  .area_view_content {
    max-width: 760px;
    margin-right: auto;
    margin-left: auto;
    padding: 0;
  }

  .area_view_content .article_content {
    margin: 0 -20px;
    padding: 32px 20px 52px;
    border-right: 0;
    border-left: 0;
    border-radius: 0;
  }

  .area_view_content .title_view,
  .area_view_content .title_post {
    font-size: 28px;
  }

  .area_view_content .view_info_post {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 12px;
  }

  .area_view_content .view_info_post > .link_category {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
  }

  .area_view_content .view_info_post > .date {
    grid-column: 1;
    grid-row: 2;
  }

  .area_view_content .view_info_post > .article_tools {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
    min-width: 0;
    max-width: 128px;
  }

  .area_view_content .view_info_post > .article_tools .letter-copy-status:not(:empty) {
    flex: 1 1 100%;
    min-width: 0;
    max-width: 128px;
    overflow-wrap: anywhere;
  }

  .article_content .article_view {
    margin-top: 42px;
    font-size: 17px;
    line-height: 1.85;
  }

  #article-view {
    margin-top: 42px;
    padding-right: 0;
    padding-left: 0;
    font-size: 17px;
    line-height: 1.85;
  }

  .letter-toc {
    margin-top: 24px;
    padding: 0;
  }

  .letter-toc + #article-view,
  .letter-toc + .article_view {
    margin-top: 28px;
  }

  .sidebar.mobile_blind {
    display: none;
  }

  #footer {
    padding-top: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}

.letter-ad-marker,
.letter-no-ads,
.letter-no-toc {
  display: none !important;
}

body .letter-ad-slot {
  position: relative;
  box-sizing: border-box;
  min-height: calc(280px + 36px);
  margin: 32px 0;
  padding: 28px 8px 8px;
  border-radius: 4px;
  background: rgba(24, 58, 50, .035);
}

body .letter-ad-slot::before {
  position: absolute;
  top: 8px;
  left: 0;
  width: 100%;
  color: #6e7873;
  font-size: 11px;
  line-height: 1;
  text-align: center;
  content: '광고';
}

body .letter-ad-slot .adsbygoogle {
  display: block;
  width: 100%;
}

body .letter-ad-slot--multiplex {
  min-height: calc(300px + 36px);
}

.article_content.letter-has-desktop-ad {
  position: relative;
}

body .letter-ad-slot--desktop {
  position: absolute;
  left: calc(100% + 24px);
  width: 300px;
  min-height: calc(250px + 36px);
  margin: 0;
  padding-right: 0;
  padding-left: 0;
}

@media (max-width: 1599px) {
  body .letter-ad-slot--desktop {
    display: none;
  }
}

@media (max-width: 768px) {
  .article_view h2,
  #article-view h2,
  #article-view h2[data-ke-size] {
    padding: 10px 12px;
    font-size: 24px;
  }

  .article_view h3,
  #article-view h3,
  #article-view h3[data-ke-size] {
    font-size: 21px;
  }

  .article_view h4,
  #article-view h4,
  #article-view h4[data-ke-size] {
    font-size: 18px;
  }

  body .letter-ad-slot--multiplex {
    min-height: calc(500px + 36px);
  }
}