:root {
  --c-orange: #e95029;
  --c-gray-50: #f9fafb;
  --c-gray-100: #f3f4f6;
  --c-gray-200: #e5e7eb;
  --c-gray-500: #6b7280;
  --c-gray-600: #4b5563;
  --c-gray-700: #374151;
  --c-gray-800: #1f2937;
}

/* === Base === */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: "Helvetica Neue", Arial, "BIZ UDPGothic", "MS Gothic", sans-serif !important;
  font-weight: 400 !important;
  background-color: #fafafa;
  color: var(--c-gray-800);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition:
    color 0.3s,
    background-color 0.3s,
    opacity 0.3s;
}

svg {
  display: inline-block;
  vertical-align: middle;
}

.break-control {
  display: inline-block;
}

/* === Layout === */
.container {
  width: min(100% - 24px, 896px);
  margin-inline: auto;
  padding-inline: 0;
}

.main-content {
  flex-grow: 1;
  padding: 1.5rem 0;
}

/* === Header === */
.site-header {
  background-color: transparent;
}

.header-inner {
  width: min(100% - 24px, 896px);
  margin-inline: auto;
  padding: 0.75rem 0;
}

.logo-link {
  display: inline-flex;
  align-items: center;
}

.logo-link:hover {
  opacity: 0.8;
}

.logo-image {
  display: block;
  width: auto;
  height: 1.5rem;
}

/* === Breadcrumbs === */
.breadcrumbs {
  display: flex;
  margin-bottom: 0.5rem;
  padding: 0 0.5rem 0.5rem;
  overflow-x: auto;
  color: var(--c-gray-500);
  font-size: 1rem;
  white-space: nowrap;
}

.breadcrumbs ol {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
}

.breadcrumbs a:hover {
  color: var(--c-orange);
}

.breadcrumbs svg {
  width: 1rem;
  height: 1rem;
  margin: 0 0.25rem;
  flex-shrink: 0;
}

.breadcrumbs .current {
  color: var(--c-gray-800);
  font-weight: 500;
}

/* === Page Header / Document === */
.page-header,
.document-content {
  background-color: white;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.page-header {
  padding: 1rem;
  border-bottom: 4px solid var(--c-orange);
  border-radius: 0.75rem 0.75rem 0 0;
}

.page-title {
  margin: 0;
  color: var(--c-gray-800);
  font-size: 1.5rem;
  font-weight: bold;
  line-height: 1.2;
}

.document-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 1.25rem;
  border: 1px solid var(--c-gray-100);
  border-top: none;
  border-radius: 0 0 0.75rem 0.75rem;
}

/* === Content Blocks === */
.content-block h2 {
  position: relative;
  margin: 0 0 1rem;
  padding-left: 1rem;
  color: var(--c-orange);
  font-size: 1.125rem;
  font-weight: bold;
}

.content-block h2::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background-color: var(--c-orange);
  border-radius: 2px;
}

/* === 開催概要 === */
.info-box {
  padding: 1rem;
  background-color: var(--c-gray-50);
  border: 1px solid var(--c-gray-100);
  border-radius: 0.5rem;
  font-size: 0.875rem;
}

.info-list {
  display: flex;
  flex-direction: column;
  margin: 0;
}

.info-row {
  display: flex;
  flex-direction: column;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--c-gray-200);
}

.info-row:last-child {
  border-bottom: none;
}

.info-dt {
  margin-bottom: 0.25rem;
  color: var(--c-gray-700);
  font-weight: 500;
}

.info-dd {
  margin: 0;
  color: var(--c-gray-800);
  line-height: 1.6;
}

.member-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.member-list li {
  margin-bottom: 0.25rem;
}

.member-list li:last-child {
  margin-bottom: 0;
}

/* === 議題 === */
.topic-container {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.topic-header {
  margin-bottom: 1.5rem;
}

.topic-title {
  margin: 0 0 0.75rem;
  color: var(--c-orange);
  font-size: 1.125rem;
  font-weight: bold;
  line-height: 1.4;
}

.topic-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  color: var(--c-gray-700);
}

.topic-program {
  color: var(--c-gray-800);
  font-weight: bold;
  padding-left: 1.5rem;
}

.topic-date {
  color: var(--c-gray-500);
  font-size: 1rem;
  padding-left: 1.5rem;
}

.topic-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* === 小見出し === */
.section-subtitle {
  display: flex;
  align-items: center;
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: bold;
}

.section-subtitle svg {
  width: 1rem;
  height: 1rem;
  margin-right: 0.375rem;
}

.section-subtitle-opinion {
  color: var(--c-orange);
}

.section-subtitle-reply {
  color: var(--c-orange);
}

/* === テキストリスト === */
.text-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 0;
  padding-left: 1.5rem;
  list-style: none;
}

.text-item {
  color: var(--c-gray-700);
  font-size: 1rem;
  line-height: 1.6;
  display: flex;
}

.text-item::before {
  content: "●";
  color: var(--c-orange);
  flex-shrink: 0;
  margin-right: 0.5em; /* テキストとの間に余白を作る */
  display: inline-block; /* transformを効かせるために必要 */
}

/* === 報告・次回開催 === */
.report-list {
  margin: 0;
  padding-left: 1.5rem;
  color: var(--c-gray-800);
  font-size: 1rem;
  line-height: 1.8;
}

.next-meeting-text {
  margin: 0;
  color: var(--c-gray-800);
  font-size: 1rem;
  padding-left: 1.5rem;
}

/* === Button === */
.btn-wrapper {
  margin-top: 2rem;
  text-align: center;
}

.btn-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.75rem 1.5rem;
  background-color: var(--c-gray-800);
  color: white;
  border-radius: 9999px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  font-size: 1rem;
  font-weight: 500;
}

.btn-back:hover {
  background-color: var(--c-gray-700);
}

/* === Footer === */
footer {
  margin-top: 3rem;
  padding: 1.5rem 1rem;
  background-color: var(--c-gray-800);
  color: var(--c-gray-500);
  border-top: 4px solid var(--c-orange);
  text-align: center;
}

footer p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
}

/* === Tablet / PC === */
@media (min-width: 768px) {
  .break-control {
    white-space: nowrap;
  }

  .container,
  .header-inner {
    width: min(100% - 48px, 896px);
  }

  .logo-image {
    height: 2rem;
  }

  .main-content {
    padding: 2rem 0;
  }

  .breadcrumbs {
    margin-bottom: 2rem;
    padding: 0;
    font-size: 0.875rem;
  }

  .page-header {
    padding: 2rem;
  }

  .page-title {
    font-size: 1.875rem;
  }

  .document-content {
    gap: 2.5rem;
    padding: 2rem;
  }

  .content-block h2 {
    font-size: 1.25rem;
  }

  .info-box {
    padding: 1.5rem;
    font-size: 1rem;
  }

  .info-row {
    flex-direction: row;
  }

  .info-dt {
    width: 12rem;
    margin-bottom: 0;
  }

  .info-dd {
    flex: 1;
  }

  .topic-title {
    font-size: 1.25rem;
  }

  .topic-meta {
    margin-bottom: 1.5rem;
  }

  .topic-details {
    gap: 2rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .section-subtitle svg {
    width: 1.25rem;
    height: 1.25rem;
    margin-right: 0.5rem;
  }

  .text-item,
  .report-list,
  .next-meeting-text {
    font-size: 1rem;
  }

  .btn-back {
    width: auto;
    padding: 0.75rem 2rem;
    font-size: 1rem;
  }

  footer p {
    font-size: 0.8125rem;
  }
}