@charset "UTF-8";

:root {
  --color-neutral-white: #ffffff;
  --color-neutral-black: #000000;
  --color-neutral-solid-gray-50: #f5f6f7;
  --color-neutral-solid-gray-100: #e6e7e9;
  --color-neutral-solid-gray-200: #d1d3d6;
  --color-neutral-solid-gray-300: #aeb3b8;
  --color-primitive-blue-900: #0055ad;
  --color-primitive-blue-1000: #00428c;
  --color-primitive-blue-1200: #00234b;
  --color-primitive-blue-200: #c5d7fb;
  --color-primitive-blue-300: #9db7f9;
  --color-primitive-yellow-300: #ffd43d;
  --font-family-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

@media screen and (max-width: 639px) {
  html { font-size: 100%; }
}

body {
  margin: 0;
  background: var(--color-neutral-solid-gray-50);
  font-family: var(--font-family-sans);
  color: #2c2f36;
}

.container {
  width: 100%;
  margin: 0 auto;
  max-width: 1180px;
  padding: 0 18px 40px;
  box-sizing: border-box;
}

.full-article {
  margin: 22px auto 0;
  padding: 30px 5% 40px;
  background: var(--color-neutral-white);
  border: 1px solid var(--color-neutral-solid-gray-100);
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
}

@media screen and (max-width: 639px) {
  .full-article { padding: 18px 5%; }
}

.full-article h1,
.full-article h2,
.full-article h3,
.full-article p,
.full-article ul,
.full-article dl {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.full-article h1 {
  font-size: 250%;
  line-height: 1.35;
  margin-top: 10px;
  margin-bottom: 20px;
}

.full-article h2 {
  margin-top: 20px;
  margin-bottom: 20px;
  font-size: 200%;
}

.full-article h3 {
  font-size: 150%;
  margin-bottom: 10px;
}

.full-article p,
.full-article li,
.full-article dd,
.full-article dt {
  font-size: 125%;
  line-height: 1.8;
}

.full-article a { text-decoration: underline; }

.center { text-align: center; }

#title-hero {
  box-sizing: border-box;
  min-height: 400px;
  padding: 110px 20px 32px;
  background-image: linear-gradient(rgba(0,0,0,.25), rgba(0,0,0,.25)), url(../img/title_background.png);
  background-image: linear-gradient(rgba(0,0,0,.25), rgba(0,0,0,.25)), image-set(
    url(../img/title_background.webp) type("image/webp"),
    url(../img/title_background.png) type("image/png")
  );
  background-size: cover;
  background-position: center;
  position: relative;
}

@media screen and (max-width: 640px) {
  #title-hero {
    min-height: 230px;
    padding-top: 58px;
  }
}

#title-logo {
  margin: 0 auto;
  max-width: 600px;
  text-align: center;
}

#title-logo img { width: 95%; height: auto; }

.hero-label {
  max-width: 600px;
  margin: 24px auto 0;
  padding: 8px 14px;
  color: #fff;
  font-size: 125%;
  font-weight: bold;
  text-align: center;
  background: rgba(0, 35, 75, 0.7);
  border-radius: 999px;
}

.sub-hero {
  margin-top: 0;
  padding: 46px 5%;
  background: #0d274d;
  color: #fff;
  border-radius: 0 0 12px 12px;
  text-align: center;
}

.sub-hero h1 {
  margin: 0 0 12px;
  font-size: 250%;
}

.sub-hero p {
  margin: 0 auto;
  max-width: 760px;
  font-size: 125%;
  line-height: 1.7;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 14px;
  margin: 18px auto 0;
}

.site-nav a {
  display: inline-flex;
  padding: 10px 18px;
  border-radius: 999px;
  background: #fff;
  color: var(--color-primitive-blue-900);
  border: 1px solid var(--color-neutral-solid-gray-200);
  font-weight: bold;
  text-decoration: none;
}

.site-nav a[aria-current="page"] {
  background: var(--color-primitive-blue-900);
  color: #fff;
  border-color: var(--color-primitive-blue-900);
}

.highlight-article,
#article-intro {
  background: #eef3fb;
}

.eyebrow {
  display: block;
  max-width: 760px;
  color: var(--color-primitive-blue-900);
  font-weight: bold;
}

.event-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  max-width: 900px;
  margin: 24px auto;
}

@media screen and (max-width: 720px) {
  .event-summary-grid { grid-template-columns: 1fr; }
}

.summary-item {
  background: #fff;
  border: 1px solid var(--color-neutral-solid-gray-100);
  border-radius: 12px;
  padding: 16px 18px;
}

.summary-label {
  display: block;
  color: #5b6470;
  font-weight: bold;
  margin-bottom: 6px;
}

.summary-item strong {
  display: block;
  font-size: 135%;
  line-height: 1.55;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  column-gap: 4px;
  padding: 14px 26px;
  margin-top: 20px;
  background: var(--color-primitive-blue-900);
  color: var(--color-neutral-white);
  border-radius: 10px;
  text-decoration: none;
  font-weight: bold;
  font-size: 135%;
  letter-spacing: 0.02em;
  border: 4px double transparent;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.14);
  transition: background 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
}

.button-link:hover {
  background: var(--color-primitive-blue-1000);
  text-decoration: underline;
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.18);
}

.button-link:active {
  background: var(--color-primitive-blue-1200);
  transform: translateY(0);
}

.button-link:focus-visible,
.site-nav a:focus-visible,
.day-tabs button:focus-visible,
.talk-toggle:focus-visible {
  outline: 4px solid var(--color-neutral-black);
  outline-offset: 2px;
  box-shadow: 0 0 0 2px var(--color-primitive-yellow-300);
}

.button-link.secondary {
  background: var(--color-neutral-white);
  color: var(--color-primitive-blue-900);
  border: 1px solid currentcolor;
  box-shadow: none;
}

.button-link.secondary:hover {
  background: var(--color-primitive-blue-200);
  color: var(--color-primitive-blue-1000);
}

.button-link.secondary:active {
  background: var(--color-primitive-blue-300);
  color: var(--color-primitive-blue-1200);
}

.button-link.large {
  padding: 16px 30px;
  font-size: 155%;
  min-width: 220px;
  text-align: center;
}

.button-link.emphasis {
  background: #d64200;
}

.button-link.emphasis:hover {
  background: #b83800;
}

.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: center;
  margin-top: 20px;
}

.primary-actions {
  max-width: 980px;
  margin-left: auto;
  margin-right: auto;
}

.section-note {
  max-width: 760px;
  margin: 28px auto 0;
  font-size: 135%;
  line-height: 1.7;
  color: #2c2f36;
}


.maintenance-message {
  box-sizing: border-box;
  max-width: 760px;
  margin: 28px auto 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  color: #2c2f36;
  font-size: 135%;
  line-height: 1.8;
  text-align: center;
}

.talk-card-grid.is-empty {
  display: block;
  max-width: none;
}

.table-wrapper.is-empty {
  max-width: none;
  overflow-x: visible;
}

.timetable-desktop.table-wrapper.is-empty {
  margin-top: 28px;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.full-article .maintenance-message {
  max-width: 760px;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 980px;
  margin: 0 auto;
}

@media screen and (max-width: 780px) {
  .two-column { grid-template-columns: 1fr; }
}

.info-tile {
  background: var(--color-neutral-white);
  border: 1px solid var(--color-neutral-solid-gray-100);
  border-radius: 12px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.06);
  padding: 20px 5% 24px;
}

.info-tile h2,
.info-tile h3,
.info-tile p,
.info-tile dl {
  max-width: none;
}

.basic-list {
  display: grid;
  grid-template-columns: 5em 1fr;
  gap: 8px 12px;
}

.basic-list dt {
  font-weight: bold;
  color: #5b6470;
}

.basic-list dd {
  margin: 0;
}

.small-note {
  font-size: 105% !important;
  color: #4b5563;
}

.video-container,
.map-container {
  position: relative;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  overflow: hidden;
  background: #000;
  border-radius: 12px;
}

.video-container {
  padding-bottom: 56.25%;
  height: 0;
}

.map-container {
  min-height: 360px;
  background: #eef3fb;
}

.video-container iframe,
.map-container iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.socialicons {
  margin-top: 24px;
}

.socialicons img {
  height: 35px;
  margin: 0 10px;
}

#article-us {
  background: #013;
  color: #F5F8FA;
}

/* talks */
.talk-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 980px;
  margin: 28px auto 0;
}

@media screen and (max-width: 780px) {
  .talk-card-grid { grid-template-columns: 1fr; }
}

.talk-card {
  background: #fff;
  border: 1px solid var(--color-neutral-solid-gray-100);
  border-radius: 12px;
  padding: 18px 20px;
  box-shadow: 0 4px 14px rgba(0,0,0,.05);
}

.talk-card h3 {
  max-width: none;
  margin-top: 0;
  color: var(--color-primitive-blue-1200);
}

.talk-card p {
  max-width: none;
  font-size: 112%;
}

.talk-meta {
  margin: 8px 0;
  color: #4b5563;
}

.talk-schedule {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--color-neutral-solid-gray-100);
  font-size: 105%;
}

/* timetable */
.day-tabs {
  display: none;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin: 20px auto;
}

.day-tabs button {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-primitive-blue-900);
  background: #fff;
  color: var(--color-primitive-blue-900);
  font-weight: bold;
  cursor: pointer;
}

.day-tabs button[aria-selected="true"] {
  background: var(--color-primitive-blue-900);
  color: #fff;
}

.table-wrapper {
  max-width: 1000px;
  margin: 28px auto 0;
  overflow-x: auto;
}

.timetable-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
  background: #fff;
}

.timetable-table th,
.timetable-table td {
  padding: 12px;
  border: 1px solid var(--color-neutral-solid-gray-200);
  vertical-align: top;
}

.timetable-table thead th {
  background: #0d274d;
  color: #fff;
}

.timetable-table tbody th {
  white-space: nowrap;
  background: #f5f8fb;
}

.slot-card {
  display: block;
  text-align: left;
}

.talk-toggle {
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.slot-title {
  display: block;
  font-weight: bold;
  color: var(--color-primitive-blue-1200);
}

.slot-speaker {
  display: block;
  color: #4b5563;
  margin-top: 4px;
}

.slot-detail {
  display: none;
  margin-top: 10px;
  padding: 10px;
  background: #eef3fb;
  border-radius: 8px;
}

.slot-detail.is-open {
  display: block;
}

.break-slot {
  color: #4b5563;
  font-weight: bold;
}

.timetable-mobile {
  display: none;
}

@media screen and (max-width: 760px) {
  .day-tabs { display: flex; }
  .timetable-desktop { display: none; }
  .timetable-mobile { display: block; max-width: 760px; margin: 20px auto 0; }
}

.mobile-day-panel[hidden] {
  display: none;
}

.mobile-slot {
  background: #fff;
  border: 1px solid var(--color-neutral-solid-gray-100);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
  box-shadow: 0 3px 8px rgba(0,0,0,.05);
}

.mobile-time {
  font-weight: bold;
  color: #5b6470;
  margin-bottom: 6px;
}


.inline-map-link {
  display: inline-block;
  margin-left: 0.5em;
  font-size: 80%;
  font-weight: bold;
  color: var(--color-primitive-blue-900);
  text-decoration: underline;
}

.inline-map-link:visited {
  color: var(--color-primitive-blue-1000);
}

@media screen and (max-width: 640px) {
  .inline-map-link {
    display: block;
    margin-left: 0;
    margin-top: 6px;
  }
}


/* 参加方法カード内のボタン位置を揃える */
#article-participation .info-tile {
  display: flex;
  flex-direction: column;
}

#article-participation .info-tile .button-group {
  margin-top: auto;
  padding-top: 18px;
}


/* 3ページ共通ナビの位置を揃える */
.site-nav {
  min-height: 46px;
  align-items: center;
}

/* サブページのヘッダー高さを揃え、ナビ位置のズレを抑える */
.sub-hero {
  min-height: 130px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* タイムテーブルを全体的に大きくし、講演枠全体を押しやすくする */
.timetable-table {
  font-size: 125%;
}

.timetable-table th,
.timetable-table td {
  padding: 18px 16px;
}

.timetable-table tbody th {
  font-size: 115%;
}

.talk-toggle {
  display: block;
  width: 100%;
  min-height: 88px;
  padding: 14px 14px;
  border: 1px solid var(--color-neutral-solid-gray-200);
  border-radius: 10px;
  background: #ffffff;
  text-align: left;
  cursor: pointer;
  font: inherit;
  color: inherit;
}

.talk-toggle:hover {
  background: #eef3fb;
  border-color: var(--color-primitive-blue-900);
}

.slot-title {
  font-size: 125%;
}

.slot-speaker {
  font-size: 110%;
}

.slot-open-label {
  display: inline-block;
  margin-top: 10px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-primitive-blue-900);
  color: #fff;
  font-size: 90%;
  font-weight: bold;
}

.slot-detail {
  font-size: 110%;
}

.mobile-slot {
  font-size: 125%;
}

.mobile-time {
  font-size: 110%;
}

@media screen and (max-width: 760px) {
  .talk-toggle {
    min-height: 80px;
  }
}


/* 講演一覧：講演者名を大きく目立たせる */
.talk-card .talk-meta {
  font-size: 135%;
  line-height: 1.6;
  color: #1f2937;
}

.talk-card .talk-meta b {
  display: block;
  margin-bottom: 4px;
  font-size: 145%;
  line-height: 1.35;
  color: var(--color-primitive-blue-1200);
}

/* 大画面向け：デジタル庁デザインシステムのリキッドレイアウト方針に寄せる。
   本文の可読幅は維持しつつ、カード・表・地図などの面情報は広い画面を活かす。 */
.container {
  max-width: min(1440px, 100%);
}

.full-article {
  padding-left: clamp(18px, 5vw, 72px);
  padding-right: clamp(18px, 5vw, 72px);
}

.event-summary-grid,
.two-column,
.talk-card-grid,
.table-wrapper,
.video-container,
.map-container {
  max-width: min(1120px, 100%);
}

/* 本文は長くなりすぎないよう可読幅を維持 */
.full-article h1,
.full-article h2,
.full-article h3,
.full-article p,
.full-article ul,
.full-article dl {
  max-width: 760px;
}


/* スマートフォン表示の文字サイズを全体的に拡大 */
@media screen and (max-width: 639px) {
  body {
    font-size: 18px;
  }

  .container {
    padding-left: 12px;
    padding-right: 12px;
  }

  .full-article {
    padding: 22px 18px 28px;
  }

  .full-article h1 {
    font-size: 2rem;
    line-height: 1.35;
  }

  .full-article h2 {
    font-size: 1.75rem;
    line-height: 1.4;
  }

  .full-article h3 {
    font-size: 1.45rem;
    line-height: 1.45;
  }

  .full-article p,
  .full-article li,
  .full-article dd,
  .full-article dt {
    font-size: 1.15rem;
    line-height: 1.8;
  }

  .section-note {
    font-size: 1.1rem;
    line-height: 1.75;
  }

  .site-nav a {
    font-size: 1.05rem;
    padding: 12px 16px;
  }

  .button-link {
    width: 100%;
    box-sizing: border-box;
    font-size: 1.15rem;
    padding: 15px 18px;
  }

  .button-link.large {
    min-width: 0;
    font-size: 1.2rem;
    padding: 16px 18px;
  }

  .summary-item strong {
    font-size: 1.2rem;
  }

  .summary-label {
    font-size: 1rem;
  }

  .talk-card h3 {
    font-size: 1.55rem;
  }

  .talk-card p {
    font-size: 1.1rem;
  }

  .talk-card .talk-meta {
    font-size: 1.2rem;
  }

  .talk-card .talk-meta b {
    font-size: 1.45rem;
  }

  .sub-hero h1 {
    font-size: 2.1rem;
  }

  .sub-hero p {
    font-size: 1.15rem;
  }

  .day-tabs button {
    font-size: 1.05rem;
    padding: 12px 16px;
  }

  .mobile-slot {
    font-size: 1.15rem;
  }

  .mobile-time {
    font-size: 1.1rem;
  }

  .slot-title {
    font-size: 1.3rem;
  }

  .slot-speaker {
    font-size: 1.1rem;
  }

  .slot-open-label {
    font-size: 1rem;
  }
}


/* 今回の追加修正：動画幅、運営メンバー、タイムテーブル詳細枠、タイムテーブル文字サイズ調整 */
#article-movie .video-container {
  max-width: min(560px, 100%);
}

.organizer-members {
  max-width: 760px;
  margin: 18px auto 0;
}

.organizer-members h3 {
  max-width: none;
  margin: 18px 0 8px;
  font-size: 135%;
}

.organizer-members ul {
  max-width: none;
  margin: 0;
  padding-left: 1.4em;
}

.organizer-members li {
  font-size: 115%;
  line-height: 1.8;
}

/* タイムテーブルページだけ全体を2周り小さくする */
.page-timetable .full-article p,
.page-timetable .full-article li,
.page-timetable .full-article dd,
.page-timetable .full-article dt {
  font-size: 110%;
}

.page-timetable .section-note {
  font-size: 110%;
}

.page-timetable .timetable-table {
  font-size: 100%;
}

.page-timetable .timetable-table th,
.page-timetable .timetable-table td {
  padding: 12px 12px;
}

.page-timetable .timetable-table tbody th {
  font-size: 100%;
}

.page-timetable .talk-toggle {
  min-height: 72px;
  padding: 10px 12px;
}

.page-timetable .slot-title {
  font-size: 105%;
}

.page-timetable .slot-speaker {
  font-size: 95%;
}

.page-timetable .slot-open-label {
  font-size: 80%;
}

.page-timetable .mobile-slot {
  font-size: 100%;
}

.page-timetable .mobile-time {
  font-size: 100%;
}

/* 詳細を開いたとき、題目・講演者・所属・要旨が同じ枠内に入っていることを明確化 */
.slot-detail {
  border: 2px solid var(--color-primitive-blue-900);
  border-radius: 12px;
  background: #f7faff;
  padding: 14px;
  box-shadow: 0 4px 12px rgba(0, 85, 173, 0.12);
}

.slot-detail-inner {
  border-left: 6px solid var(--color-primitive-blue-900);
  padding: 10px 12px 10px 16px;
  background: #fff;
  border-radius: 8px;
}

.slot-detail-kicker {
  margin: 0 0 4px;
  font-size: 85% !important;
  font-weight: bold;
  color: var(--color-primitive-blue-900);
  letter-spacing: 0.04em;
}

.slot-detail-title {
  max-width: none !important;
  margin: 0 0 8px !important;
  color: var(--color-primitive-blue-1200);
  font-size: 125% !important;
  line-height: 1.35;
}

.slot-detail-speaker,
.slot-detail-affiliation,
.slot-detail-abstract {
  max-width: none !important;
  margin: 6px 0 !important;
  font-size: 100% !important;
  line-height: 1.65 !important;
}

@media screen and (max-width: 639px) {
  #article-movie .video-container {
    max-width: 100%;
  }

  .page-timetable .slot-title {
    font-size: 1.05rem;
  }

  .page-timetable .slot-speaker {
    font-size: 0.95rem;
  }

  .page-timetable .slot-open-label {
    font-size: 0.9rem;
  }
}


/* 最終調整：日時表示・動画比率・講演一覧の名前/所属サイズ */
.date-time-lines {
  display: grid !important;
  grid-template-columns: max-content max-content;
  column-gap: 0.5em;
  row-gap: 0.2em;
  align-items: baseline;
}

.date-time-lines span {
  display: contents;
}

/* "2026年5月16日（土）10:00–18:00" を日付と時間に分けずとも、等幅寄りで日付先頭を揃える */
.date-time-lines span::before {
  content: "";
}

/* 紹介動画は16:9を維持しつつ、画面幅に応じて自然に可変 */
#article-movie .video-container {
  width: min(56vw, 560px);
  max-width: 100%;
  padding-bottom: min(31.5vw, 315px); /* 56vw * 9/16。最大560px幅なら315px高 */
}

@media screen and (max-width: 900px) {
  #article-movie .video-container {
    width: min(82vw, 560px);
    padding-bottom: min(46.125vw, 315px);
  }
}

@media screen and (max-width: 639px) {
  #article-movie .video-container {
    width: 100%;
    padding-bottom: 56.25%;
  }
}

/* talks.html: 名前を二回り大きく、所属・専門を一回り小さく */
.talk-card .talk-meta {
  font-size: 105%;
  line-height: 1.55;
}

.talk-card .talk-meta b {
  font-size: 180%;
  line-height: 1.25;
  margin-bottom: 6px;
}

@media screen and (max-width: 639px) {
  .talk-card .talk-meta {
    font-size: 1rem;
  }

  .talk-card .talk-meta b {
    font-size: 1.7rem;
  }
}


/* 追加調整：直近の文字サイズ変更はPC版のみに限定し、スマホ側は従来の見やすいサイズへ戻す */

/* talks.html: PCでは講演者名をタイトル程度、所属・専門は小さめ */
@media screen and (min-width: 640px) {
  .talk-card h3 {
    font-size: 1.75rem;
  }

  .talk-card .talk-meta {
    font-size: 1.05rem;
    line-height: 1.55;
  }

  .talk-card .talk-meta b {
    font-size: 1.75rem;
    line-height: 1.3;
    margin-bottom: 6px;
  }
}

/* talks.html: スマホではタイトルと講演者名を同程度にし、大きくなりすぎないようにする */
@media screen and (max-width: 639px) {
  .talk-card h3,
  .talk-card .talk-meta b {
    font-size: 1.35rem;
    line-height: 1.35;
  }

  .talk-card .talk-meta {
    font-size: 1rem;
    line-height: 1.55;
  }
}

/* タイムテーブルの小型化はPC版だけに限定し、スマホ版は以前の大きめ表示に戻す */
@media screen and (max-width: 639px) {
  .page-timetable .full-article p,
  .page-timetable .full-article li,
  .page-timetable .full-article dd,
  .page-timetable .full-article dt {
    font-size: 1.15rem;
    line-height: 1.8;
  }

  .page-timetable .section-note {
    font-size: 1.1rem;
    line-height: 1.75;
  }

  .page-timetable .mobile-slot {
    font-size: 1.15rem;
  }

  .page-timetable .mobile-time {
    font-size: 1.1rem;
  }

  .page-timetable .slot-detail-title,
  .page-timetable .slot-title {
    font-size: 1.3rem !important;
  }

  .page-timetable .slot-detail-speaker,
  .page-timetable .slot-speaker {
    font-size: 1.1rem !important;
  }

  .page-timetable .slot-open-label {
    font-size: 1rem;
  }
}

/* モバイルでは開催日時→会場→現地参加→オンライン参加の順にする。
   PCの2×2では現在の配置（開催日時→現地参加→会場→オンライン参加）を維持する。 */
@media screen and (max-width: 720px) {
  .event-summary-grid .summary-item:nth-child(1) { order: 1; }
  .event-summary-grid .summary-item:nth-child(2) { order: 3; }
  .event-summary-grid .summary-item:nth-child(3) { order: 2; }
  .event-summary-grid .summary-item:nth-child(4) { order: 4; }
}

/* タイムテーブル詳細：タイトル・講演者の重複をなくし、1つの枠が展開する見た目にする */
.slot-detail-card {
  border: 2px solid var(--color-primitive-blue-900);
  border-radius: 12px;
  background: #f7faff;
  padding: 10px;
  box-shadow: 0 4px 12px rgba(0, 85, 173, 0.12);
}

.slot-detail-card .slot-detail-inner {
  border-left: 6px solid var(--color-primitive-blue-900);
  padding: 10px 12px 10px 16px;
  background: #fff;
  border-radius: 8px;
}

.slot-detail-card .talk-toggle {
  border: 0;
  border-radius: 8px;
  min-height: 0;
  padding: 6px 0 8px;
  background: transparent;
  box-shadow: none;
}

.slot-detail-card .talk-toggle:hover {
  background: transparent;
  border-color: transparent;
}

.slot-detail-card .slot-detail {
  margin-top: 10px;
  border: 0;
  padding: 10px 0 0;
  box-shadow: none;
  background: transparent;
  border-top: 1px solid var(--color-neutral-solid-gray-200);
  border-radius: 0;
}

.slot-detail-card .slot-detail-title,
.slot-detail-card .slot-detail-speaker {
  display: block;
  max-width: none !important;
  margin: 4px 0 !important;
}

.slot-detail-card .slot-detail-title {
  color: var(--color-primitive-blue-1200);
  font-weight: bold;
}

.slot-detail-card .slot-detail-speaker {
  color: #2c2f36;
}



/* 追加調整：講演一覧とタイムテーブルの文字サイズ・余白 */
@media screen and (min-width: 640px) {
  /* 講演一覧：タイトルと名前を一回り小さく */
  .talk-card h3 {
    font-size: 1.55rem;
  }

  .talk-card .talk-meta b {
    font-size: 1.55rem;
    line-height: 1.3;
    margin-bottom: 10px;
  }

  /* 講演一覧：所属・専門を少し大きくし、名前との間に余白を作る */
  .talk-card .talk-meta {
    font-size: 1.15rem;
    line-height: 1.6;
  }
}

/* タイムテーブル：講演者名を少しだけ大きく */
.page-timetable .slot-detail-speaker,
.page-timetable .slot-speaker {
  font-size: 1.08em !important;
}

.page-timetable .slot-detail-card .slot-detail-speaker {
  margin-top: 8px !important;
}

/* タイムテーブル：kickerを消した後の余白を整える */
.page-timetable .slot-detail-card .slot-detail-title {
  margin-top: 0 !important;
}


/* 追加調整：青系配色、講演一覧サイズ、開催日時、トップ見出し */

/* サブページ上部と運営情報を、明るい青系に変更 */
.sub-hero {
  background: #e8f1fe;
  color: var(--color-primitive-blue-1200);
  border: 1px solid var(--color-primitive-blue-200);
}

.sub-hero h1,
.sub-hero p {
  color: var(--color-primitive-blue-1200);
}

#article-us {
  background: #e8f1fe;
  color: var(--color-primitive-blue-1200);
  border-color: var(--color-primitive-blue-200);
}

/* 講演内容ページのタイトル・名前は落ち着いた青系で統一 */
.talk-card h3,
.talk-card .talk-meta b {
  color: var(--color-primitive-blue-1000);
}

/* 講演一覧：タイトルと名前をPC/スマホ両方で一周り小さく */
@media screen and (min-width: 640px) {
  .talk-card h3,
  .talk-card .talk-meta b {
    font-size: 1.35rem;
    line-height: 1.35;
  }

  .talk-card .talk-meta {
    font-size: 1.12rem;
    line-height: 1.65;
  }
}

@media screen and (max-width: 639px) {
  .talk-card h3,
  .talk-card .talk-meta b {
    font-size: 1.15rem;
    line-height: 1.4;
  }

  .talk-card .talk-meta {
    font-size: 1rem;
    line-height: 1.6;
  }
}

/* 開催日時：5月の位置を揃え、カード幅が狭くても溢れにくい表示にする */
.date-time-lines {
  display: grid !important;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 0.35em;
  row-gap: 0.15em;
  align-items: baseline;
  font-size: clamp(0.95rem, 1.45vw, 1.35rem) !important;
  line-height: 1.5 !important;
}

.date-time-lines span {
  display: inline !important;
}

.date-year {
  white-space: nowrap;
}

.date-year-empty::before {
  content: "";
}

.date-main {
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: normal;
}

/* PC幅でもカードが狭い時に不自然に溢れないようにする */
.summary-item {
  min-width: 0;
}

.summary-item strong {
  min-width: 0;
}

/* トップ見出し：意味のある区切りで改行されるようにする */
.event-name-lines {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: baseline;
  column-gap: 0.35em;
  row-gap: 0.1em;
  max-width: 900px !important;
  text-align: center;
  line-height: 1.3;
}

.event-name-lines span {
  display: inline-block;
  white-space: nowrap;
}

@media screen and (max-width: 639px) {
  .event-name-lines {
    font-size: 1.8rem !important;
    row-gap: 0.15em;
  }

  .date-time-lines {
    font-size: 1.05rem !important;
  }
}


/* パンくず風リンク */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  align-items: center;
  max-width: min(1120px, 100%);
  margin: 16px auto 0;
  padding: 10px 14px;
  box-sizing: border-box;
  color: #4b5563;
  font-size: 0.98rem;
}

.breadcrumb a {
  color: var(--color-primitive-blue-900);
  font-weight: bold;
  text-decoration: underline;
}

.breadcrumb span {
  line-height: 1.6;
}

/* タイムテーブル：表形式から日別タイムライン形式へ */
.timetable-desktop.table-wrapper {
  max-width: min(1120px, 100%);
  overflow: visible;
  background: transparent;
  box-shadow: none;
  border: 0;
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  max-width: min(1120px, 100%);
  margin: 28px auto 0;
}

.timeline-day {
  min-width: 0;
  background: #f8fbff;
  border: 1px solid var(--color-primitive-blue-200);
  border-radius: 16px;
  padding: 18px;
}

.timeline-day-title {
  max-width: none !important;
  margin: 0 0 16px !important;
  padding-bottom: 10px;
  border-bottom: 3px solid var(--color-primitive-blue-900);
  color: var(--color-primitive-blue-1200);
  font-size: 1.45rem !important;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.timeline-card {
  position: relative;
  display: grid;
  grid-template-columns: 8.5em minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--color-neutral-solid-gray-200);
  border-left: 6px solid var(--color-primitive-blue-900);
  border-radius: 14px;
  box-shadow: 0 4px 12px rgba(0, 85, 173, 0.08);
}

.timeline-card.is-long-slot {
  border-left-width: 10px;
  background: #eef5ff;
  padding-top: 18px;
  padding-bottom: 18px;
}

.timeline-card.is-long-slot .duration-badge {
  background: var(--color-primitive-yellow-300);
  color: #2c2f36;
}

.timeline-time {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--color-primitive-blue-1200);
  font-weight: bold;
  font-size: 1.1rem;
  line-height: 1.25;
}

.duration-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--color-primitive-blue-200);
  color: var(--color-primitive-blue-1200);
  font-size: 0.86rem;
  font-weight: bold;
}

.break-slot-card {
  border-left-color: var(--color-neutral-solid-gray-300);
  background: #f7f7f8;
}

.timeline-card .slot-detail-inner {
  border-left: 0;
  padding: 0;
  background: transparent;
  border-radius: 0;
}

.timeline-card .talk-toggle {
  border: 0;
  min-height: 0;
  padding: 0;
  background: transparent;
}

.timeline-card .talk-toggle:hover {
  background: transparent;
  border-color: transparent;
}

.timeline-card .slot-detail-title {
  font-size: 1.08rem !important;
  line-height: 1.45;
}

.timeline-card .slot-detail-speaker {
  font-size: 1.02rem !important;
}

.timeline-card .slot-detail {
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--color-primitive-blue-200);
  border-radius: 10px;
  background: #fff;
  box-shadow: none;
}

@media screen and (max-width: 760px) {
  .timeline-grid {
    grid-template-columns: 1fr;
  }

  .timeline-day {
    padding: 14px;
  }

  .timeline-card {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .timeline-time {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    font-size: 1rem;
  }

  .breadcrumb {
    padding-left: 4px;
    padding-right: 4px;
    font-size: 0.95rem;
  }
}


/* 最終調整：パンくずを最上部に重ねる、タイムテーブルは左時間列の表形式に戻す */

/* container内の先頭に置いたパンくずを写真・ヘッダーの上に重ねる */
.container {
  position: relative;
}

.breadcrumb-overlay {
  position: absolute;
  top: 8px;
  left: clamp(14px, 3vw, 36px);
  right: clamp(14px, 3vw, 36px);
  z-index: 10;
  max-width: none;
  margin: 0;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(4px);
  box-shadow: 0 3px 12px rgba(0,0,0,.12);
}

.breadcrumb-overlay a {
  color: var(--color-primitive-blue-900);
}

/* 紹介動画カード内SNS */
.movie-sns-block {
  max-width: 760px;
  margin: 24px auto 0;
  text-align: center;
}

.movie-sns-block h3 {
  max-width: none;
  margin: 0 0 8px;
  color: var(--color-primitive-blue-1200);
}

.movie-sns-block .socialicons {
  margin-top: 8px;
}

/* タイムテーブル：左に時間、右に各日のカードを置く表形式 */
.timetable-desktop.table-wrapper {
  max-width: min(1120px, 100%);
  margin: 28px auto 0;
  overflow-x: auto;
  background: #fff;
  border: 1px solid var(--color-neutral-solid-gray-200);
  border-radius: 14px;
  box-shadow: 0 4px 14px rgba(0, 85, 173, 0.06);
}

.timetable-table-enhanced {
  width: 100%;
  min-width: 820px;
  border-collapse: separate;
  border-spacing: 0;
  background: #fff;
  font-size: 100%;
}

.timetable-table-enhanced th,
.timetable-table-enhanced td {
  padding: 14px;
  border-bottom: 1px solid var(--color-neutral-solid-gray-200);
  vertical-align: top;
}

.timetable-table-enhanced thead th {
  position: sticky;
  top: 0;
  background: #e8f1fe;
  color: var(--color-primitive-blue-1200);
  z-index: 2;
}

.timetable-table-enhanced tbody th {
  width: 8.5em;
  white-space: nowrap;
  background: #f8fbff;
  color: var(--color-primitive-blue-1200);
  font-size: 1rem;
  font-weight: bold;
}

.timetable-table-enhanced td {
  min-width: 260px;
}

/* 既存のtimeline系指定を表内では無効化 */
.timetable-table-enhanced .slot-card {
  display: block;
  position: relative;
  border: 2px solid var(--color-primitive-blue-200);
  border-left: 6px solid var(--color-primitive-blue-900);
  border-radius: 12px;
  background: #fff;
  padding: 12px;
  box-shadow: 0 4px 12px rgba(0,85,173,.08);
}

.timetable-table-enhanced .slot-card.is-long-slot,
.mobile-slot .slot-card.is-long-slot {
  border-left-width: 10px;
  background: #eef5ff;
  padding-top: 18px;
  padding-bottom: 18px;
}

.timetable-table-enhanced .duration-badge,
.mobile-slot .duration-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  margin-bottom: 8px;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--color-primitive-blue-200);
  color: var(--color-primitive-blue-1200);
  font-size: 0.86rem;
  font-weight: bold;
}

.timetable-table-enhanced .is-long-slot .duration-badge,
.mobile-slot .is-long-slot .duration-badge {
  background: var(--color-primitive-yellow-300);
  color: #2c2f36;
}

.timetable-table-enhanced .slot-detail-inner,
.mobile-slot .slot-detail-inner {
  border-left: 0;
  padding: 0;
  background: transparent;
  border-radius: 0;
}

.timetable-table-enhanced .talk-toggle,
.mobile-slot .talk-toggle {
  border: 0;
  min-height: 0;
  padding: 0;
  background: transparent;
}

.timetable-table-enhanced .talk-toggle:hover,
.mobile-slot .talk-toggle:hover {
  background: transparent;
  border-color: transparent;
}

.timetable-table-enhanced .slot-detail,
.mobile-slot .slot-detail {
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--color-primitive-blue-200);
  border-radius: 10px;
  background: #fff;
  box-shadow: none;
}

@media screen and (max-width: 760px) {
  .breadcrumb-overlay {
    top: 6px;
    left: 10px;
    right: 10px;
    font-size: 0.86rem;
    border-radius: 14px;
  }
}


/* パンくず導入後の見出し位置・ナビサイズ・SNS説明 */
.sub-hero h1 {
  margin-top: 1.2em;
}

/* 色付きヘッダー領域自体の高さや下端は大きく変えず、見出しだけ下げる */
.sub-hero {
  justify-content: flex-start;
}

.site-nav a {
  font-size: 1.22rem;
  padding: 14px 24px;
}

@media screen and (max-width: 639px) {
  .site-nav a {
    font-size: 1.15rem;
    padding: 13px 18px;
  }
}

.movie-sns-block .sns-note {
  max-width: 760px;
  margin: 8px auto 0;
  font-size: 1.05rem;
  line-height: 1.7;
}

.movie-sns-block .socialicons {
  margin-top: 14px;
}


/* SNS説明文のサイズを通常の説明文と揃える */
.movie-sns-block .sns-note {
  font-size: 1.35rem;
  line-height: 1.8;
}

@media screen and (max-width: 639px) {
  .movie-sns-block .sns-note {
    font-size: 1.1rem;
    line-height: 1.75;
  }
}


/* 動画・地図サイズ調整：16:9を維持しつつ最大幅を720pxに揃える */
#article-movie .video-container {
  width: min(72vw, 720px);
  max-width: 100%;
  padding-bottom: min(40.5vw, 405px); /* 720px × 9 / 16 = 405px */
}

/* Google Mapも動画と同程度の最大横幅にする */
#article-map .map-container {
  max-width: min(72vw, 720px);
  width: 100%;
}

@media screen and (max-width: 900px) {
  #article-movie .video-container {
    width: min(88vw, 720px);
    padding-bottom: min(49.5vw, 405px);
  }

  #article-map .map-container {
    max-width: min(88vw, 720px);
  }
}

@media screen and (max-width: 639px) {
  #article-movie .video-container {
    width: 100%;
    padding-bottom: 56.25%;
  }

  #article-map .map-container {
    max-width: 100%;
  }
}


/* 開催日時カード：2026年を1行目、各日程を2・3行目に表示。
   通常は大きめのまま、狭いカードでは収まる範囲で縮小する。 */
.date-time-lines {
  display: grid !important;
  grid-template-columns: 1fr;
  row-gap: 0.15em;
  align-items: start;
  line-height: 1.45 !important;
  font-size: clamp(1.05rem, 1.25vw, 1.35rem) !important;
}

.date-time-lines span {
  display: block !important;
}

.date-year-full {
  font-weight: bold;
  white-space: nowrap;
}

.date-main {
  white-space: nowrap;
  min-width: 0;
}

@container (max-width: 360px) {
  .date-time-lines {
    font-size: clamp(0.92rem, 4.3cqw, 1.15rem) !important;
  }
}

/* container query 非対応環境向け。カードが狭い画面では少しだけ縮める */
.summary-item {
  container-type: inline-size;
}

@media screen and (max-width: 900px) {
  .date-time-lines {
    font-size: clamp(0.98rem, 2.4vw, 1.25rem) !important;
  }
}

@media screen and (max-width: 420px) {
  .date-time-lines {
    font-size: clamp(0.9rem, 4.3vw, 1.08rem) !important;
  }
}


/* 今回修正：トップ背景・カード順序・参加方法順序・タイムテーブルバッジ色 */

/* index 上部の淡い水色を白にする */
#article-event.highlight-article {
  background: var(--color-neutral-white);
}

/* スマホでは上部カードを 開催日時→会場→オンライン→現地 の順へ */
@media screen and (max-width: 720px) {
  .event-summary-grid .summary-item:nth-child(1) { order: 1; }
  .event-summary-grid .summary-item:nth-child(2) { order: 3; } /* オンライン */
  .event-summary-grid .summary-item:nth-child(3) { order: 2; } /* 会場 */
  .event-summary-grid .summary-item:nth-child(4) { order: 4; } /* 現地 */
}

/* PCでは参加方法を左オンライン・右現地にし、スマホでは現地→オンラインに戻す */
@media screen and (max-width: 780px) {
  #article-participation .two-column .info-tile:nth-child(1) { order: 2; }
  #article-participation .two-column .info-tile:nth-child(2) { order: 1; }
}

/* 20分/60分バッジ色を反転：通常20分を黄色、60分を青系にする */
.timetable-table-enhanced .duration-badge,
.mobile-slot .duration-badge {
  background: var(--color-primitive-yellow-300);
  color: #2c2f36;
}

.timetable-table-enhanced .is-long-slot .duration-badge,
.mobile-slot .is-long-slot .duration-badge {
  background: var(--color-primitive-blue-900);
  color: #fff;
}

/* 講演一覧・タイムテーブルのスマホ見出しをパンくず分だけ半行下げる */
@media screen and (max-width: 639px) {
  .sub-hero h1 {
    margin-top: 1.7em;
  }
}


/* バッジ色の最終上書き：20分=黄色、60分=青 */
.duration-badge {
  background: var(--color-primitive-yellow-300) !important;
  color: #2c2f36 !important;
}

.is-long-slot .duration-badge,
.slot-card.is-long-slot .duration-badge,
.timetable-table-enhanced .is-long-slot .duration-badge,
.mobile-slot .is-long-slot .duration-badge {
  background: var(--color-primitive-blue-900) !important;
  color: #ffffff !important;
}


/* 「10分で伝えます！東大研究最前線」とは？ の背景を白にする */
#article-intro {
  background: var(--color-neutral-white);
}


/* 白背景内でも開催情報カードが区切れて見えるようにする */
#article-event {
  border: 1px solid var(--color-neutral-solid-gray-200);
  box-shadow: 0 10px 28px rgba(0, 35, 75, 0.12);
}

#article-event .summary-item {
  border: 1px solid var(--color-neutral-solid-gray-200);
  box-shadow: 0 5px 14px rgba(0, 35, 75, 0.08);
}


/* スマホ版でも参加方法はオンライン→現地参加の順にする */
@media screen and (max-width: 780px) {
  #article-participation .two-column .info-tile:nth-child(1) { order: 1; }
  #article-participation .two-column .info-tile:nth-child(2) { order: 2; }
}
/* 運営情報：統括を強調し、メンバーは横並びで省スペース表示 */
#article-us > p:nth-of-type(2) {
  max-width: 760px;
  margin: 18px auto;
  padding: 16px 20px;
  background: var(--color-neutral-white);
  border: 2px solid var(--color-primitive-blue-900);
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0, 85, 173, 0.12);
  color: var(--color-primitive-blue-1200);
  font-size: 130%;
  font-weight: bold;
  text-align: center;
}

#article-us > p:nth-of-type(2) span {
  font-size: 105%;
}

.organizer-members {
  max-width: 900px;
  margin: 22px auto 0;
  padding: 18px 20px;
  background: var(--color-neutral-white);
  border: 1px solid var(--color-primitive-blue-200);
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(0, 85, 173, 0.08);
}

.organizer-members h3 {
  margin: 0 0 14px;
  color: var(--color-primitive-blue-1200);
}

.organizer-members ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.member-group {
  display: grid;
  grid-template-columns: 8em minmax(0, 1fr);
  gap: 10px 14px;
  align-items: start;
  font-size: 105%;
  line-height: 1.7;
}

.member-role {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-primitive-blue-900);
  color: #fff;
  font-weight: bold;
  white-space: nowrap;
}

.member-names {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
}

.member-chip {
  display: inline-flex;
  padding: 2px 0;
  color: #2c2f36;
  white-space: nowrap;
}

.member-chip:not(:last-child)::after {
  content: "、";
  color: #6b7280;
}

@media screen and (max-width: 639px) {
  #article-us > p:nth-of-type(2) {
    font-size: 1.12rem;
    padding: 14px 16px;
  }

  .member-group {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .member-role {
    width: fit-content;
  }
}


/* 運営統括：囲みを弱め、文字サイズの強調だけ残す */
#article-us > p:nth-of-type(2) {
  max-width: 760px;
  margin: 14px auto;
  padding: 0;
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  color: var(--color-primitive-blue-1200);
  font-size: 130%;
  font-weight: bold;
  text-align: center;
}

/* デフォルト区分「運営メンバー」は見出しと重複するため、青ラベルを出さず名前だけを横並びにする */
.member-group-no-role {
  grid-template-columns: 1fr;
}

.member-group-no-role .member-names {
  justify-content: flex-start;
}

/* YouTube facade: common.jsが生成したiframeを、初期表示では軽量なサムネイル表示に置き換える */
.video-container.youtube-facade {
  position: relative;
  background: #000;
}

.youtube-load {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  padding: 0;
  border: 0;
  background: #000;
  cursor: pointer;
  font: inherit;
  overflow: hidden;
  -webkit-appearance: none;
  appearance: none;
}

.youtube-load img {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
  background: #000;
}

.youtube-load img.is-four-three-thumbnail {
  object-fit: contain;
}

.youtube-load::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.08),
    rgba(0, 0, 0, 0.28)
  );
  pointer-events: none;
}

.youtube-play {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 76px;
  height: 54px;
  border-radius: 14px;
  color: #fff;
  background: rgba(0, 0, 0, 0.72);
  font-size: 2.4rem;
  line-height: 1;
  transform: translate(-50%, -50%);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.35);
  transition: transform 0.15s ease, background 0.15s ease;
}

.youtube-load:hover .youtube-play,
.youtube-load:focus-visible .youtube-play {
  background: rgba(0, 85, 173, 0.92);
  transform: translate(-50%, -50%) scale(1.04);
}

.youtube-load:focus-visible {
  outline: 4px solid var(--color-neutral-black);
  outline-offset: 4px;
}

/* article-survey は問い合わせセクションと同じ .full-article / .button-link を使用する */


/* maintenance empty-state mobile */
@media screen and (max-width: 639px) {
  .maintenance-message {
    width: 100%;
    padding: 0;
    font-size: 1.1rem;
    line-height: 1.75;
  }
}

/* 空状態メッセージ：講演一覧とタイムテーブルで同じ見え方にする */
.timetable-mobile.is-empty {
  max-width: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.page-timetable .maintenance-message,
.talk-card-grid.is-empty .maintenance-message,
.timetable-mobile.is-empty .maintenance-message {
  box-sizing: border-box;
  max-width: 760px;
  margin: 28px auto 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: #2c2f36;
  font-size: 135%;
  line-height: 1.8;
  text-align: center;
}

@media screen and (max-width: 760px) {
  .timetable-mobile.is-empty {
    display: block;
    max-width: none;
    margin: 0;
  }
}

@media screen and (max-width: 639px) {
  .page-timetable .maintenance-message,
  .talk-card-grid.is-empty .maintenance-message,
  .timetable-mobile.is-empty .maintenance-message {
    width: 100%;
    font-size: 1.15rem;
    line-height: 1.8;
  }
}

/* 未公開リンク用 404 ページ */
.page-not-found {
  min-height: 100vh;
  background:
    radial-gradient(circle at 20% 10%, rgba(0, 85, 173, 0.18), transparent 32%),
    radial-gradient(circle at 80% 20%, rgba(0, 132, 255, 0.12), transparent 28%),
    linear-gradient(180deg, #eef5ff 0%, #f7f9fc 55%, #ffffff 100%);
}

.not-found-main {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 96px 20px 56px;
}

.not-found-card {
  box-sizing: border-box;
  width: min(920px, 100%);
  padding: clamp(36px, 6vw, 72px) clamp(22px, 5vw, 64px);
  border: 1px solid rgba(0, 85, 173, 0.16);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 24px 70px rgba(0, 36, 72, 0.16);
  text-align: center;
  backdrop-filter: blur(10px);
}

.not-found-code {
  margin: 0 0 10px;
  color: var(--color-primitive-blue-900);
  font-size: clamp(4rem, 12vw, 8.5rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0.04em;
}

.not-found-card h1 {
  margin: 0 0 18px;
  color: var(--color-primitive-blue-1200);
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.25;
}

.not-found-card p {
  max-width: 720px;
  margin: 0 auto;
  color: #2c2f36;
  font-size: 1.25rem;
  line-height: 1.9;
}

.not-found-card .button-group {
  margin-top: 28px;
}

/* SNSアイコンのリンク下線を消す */
.socialicons a,
.movie-sns-block .socialicons a,
.full-article .socialicons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
  text-decoration: none;
  border-bottom: 0;
}

.socialicons a:hover,
.socialicons a:focus,
.movie-sns-block .socialicons a:hover,
.movie-sns-block .socialicons a:focus,
.full-article .socialicons a:hover,
.full-article .socialicons a:focus {
  text-decoration: none;
}

/* 整備中文言の表示を講演一覧・タイムテーブルで完全に統一 */
.talk-card-grid.is-empty .maintenance-message,
.page-timetable .timetable-desktop.table-wrapper.is-empty .maintenance-message,
.page-timetable .timetable-mobile.is-empty .maintenance-message {
  display: block;
  max-width: 760px;
  margin: 28px auto 0;
  padding: 0;
  color: #2c2f36;
  font-size: 1.35rem;
  line-height: 1.8;
  text-align: center;
}

.page-timetable .timetable-desktop.table-wrapper.is-empty,
.page-timetable .timetable-mobile.is-empty {
  border: 0;
  background: transparent;
  box-shadow: none;
}

@media screen and (max-width: 639px) {
  .not-found-card p {
    font-size: 1.05rem;
    line-height: 1.8;
  }

  .not-found-card .button-group {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .not-found-card .button-link {
    width: 100%;
    margin-top: 0;
  }

  .talk-card-grid.is-empty .maintenance-message,
  .page-timetable .timetable-desktop.table-wrapper.is-empty .maintenance-message,
  .page-timetable .timetable-mobile.is-empty .maintenance-message {
    width: 100%;
    font-size: 1.15rem;
    line-height: 1.8;
  }
}