html {
  box-sizing: border-box;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  margin: 0;
  background: #ffffff;
  color: #1a1a1a;
  font: 15px/1.7 "Yu Gothic UI", "Hiragino Sans", "Meiryo", sans-serif;
}

a {
  color: #2457a8;
  text-decoration: underline;
}

button {
  font: inherit;
}

.utility-header {
  border-bottom: 1px solid #cfd6e2;
  background: #ffffff;
}

.utility-inner,
.page-shell,
.subpage-shell,
.site-band {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.utility-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 0;
}

.utility-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  font-size: 13px;
}

.lang-tools {
  display: flex;
  gap: 6px;
}

.lang-tools button {
  border: 1px solid #9aa9c0;
  background: #ffffff;
  padding: 2px 10px;
}

.lang-tools button[aria-pressed="true"] {
  background: #edf2fb;
}

.site-band {
  padding: 10px 0 0;
  font-size: 13px;
}

.page-shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 32px;
  padding: 12px 0 36px;
}

.subpage-shell {
  padding: 16px 0 36px;
}

.side-rail {
  font-size: 13px;
}

.side-label {
  margin: 0 0 8px;
  font-weight: 700;
}

.side-list {
  margin: 0 0 24px;
  padding-left: 18px;
}

.side-list.compact li {
  margin-bottom: 6px;
}

.breadcrumb {
  margin-bottom: 18px;
  font-size: 13px;
}

.breadcrumb span {
  margin: 0 6px;
}

.course-header {
  margin-bottom: 18px;
}

.course-year {
  margin: 0 0 4px;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3.6vw, 38px);
  line-height: 1.2;
}

h2 {
  margin: 0 0 10px;
  font-size: 22px;
  line-height: 1.3;
}

.lead,
.section-block p,
.faq-item p,
.timeline p {
  margin: 0;
}

.info-grid,
.row-list {
  margin: 0 0 24px;
  border-top: 1px solid #cfd6e2;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.info-grid div,
.row-list div {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid #dfe5ef;
}

dt {
  font-weight: 700;
}

dd {
  margin: 0;
}

.section-block,
.faq-item,
.status-panel {
  padding: 18px 0;
  border-top: 1px solid #cfd6e2;
}

.plain-list {
  margin: 0;
  padding-left: 18px;
}

.plain-list li {
  margin-bottom: 8px;
}

.keyword-line {
  font-size: 14px;
}

.schedule-table {
  border-top: 1px solid #dfe5ef;
}

.schedule-head,
.schedule-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 18px;
  padding: 12px 0;
  border-bottom: 1px solid #dfe5ef;
}

.schedule-head {
  font-weight: 700;
  background: #f8fafc;
}

.schedule-row strong {
  display: block;
  margin-bottom: 4px;
}

.status-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 20px;
  align-items: start;
}

.status-box {
  border: 1px solid #cfd6e2;
  padding: 14px;
}

.status-line {
  margin: 0 0 12px;
  font-weight: 700;
}

.vote-widget {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

[data-vote-badge] {
  display: inline-block;
  border: 1px solid #8ea1c0;
  padding: 4px 8px;
  font-size: 13px;
}

.timeline {
  margin: 0;
  padding-left: 22px;
}

.timeline li {
  margin-bottom: 14px;
}

@media (max-width: 860px) {
  .page-shell {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .info-grid,
  .status-panel {
    grid-template-columns: 1fr;
  }

  .schedule-head,
  .schedule-row,
  .info-grid div,
  .row-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 560px) {
  .utility-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .utility-links {
    gap: 8px 14px;
  }
}