:root {
  --bg: #ffffff;
  --ink: #24272b;
  --muted: #68707a;
  --line: #dfe4ea;
  --accent: #1f7194;
  --link: #006c8f;
  --max: 980px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "YuMincho",
    "Noto Serif JP", serif;
  font-weight: 400;
  line-height: 1.78;
  letter-spacing: 0;
}

a {
  color: var(--link);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

.portal-page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 18px 48px;
}

.portal-header {
  padding: 8px 0 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 22px;
}

.group-name {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.4;
}

.portal-title {
  color: var(--accent);
  font-size: clamp(1.65rem, 8vw, 2.7rem);
  font-weight: 500;
  line-height: 1.35;
  margin: 0;
  text-align: center;
}

.portal-section {
  padding: 22px 0;
}

.portal-section:first-of-type {
  padding-top: 0;
}

.portal-section h2 {
  color: var(--accent);
  font-size: 1.22rem;
  font-weight: 500;
  line-height: 1.35;
  margin: 0 0 16px;
}

.portal-section h3 {
  font-size: 1rem;
  font-weight: 500;
  margin: 1.15em 0 0.75em;
}

.portal-section p {
  max-width: 56rem;
  margin: 0 0 0.85rem;
}

.spacer {
  height: 44px;
  border-top: 1px solid var(--line);
}

.schedule-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 18px;
}

.definition-list {
  display: grid;
  gap: 8px;
  margin: 0 0 1.15em;
}

.definition-list div {
  display: grid;
  gap: 2px;
}

.definition-list dt {
  color: var(--muted);
  font-size: 0.9rem;
}

.definition-list dd {
  margin: 0;
}

.plain-list {
  margin: 0;
  padding-left: 1.2em;
}

.plain-list li + li {
  margin-top: 6px;
}

.recording-list {
  margin: 0 0 0.85em;
  padding-left: 1.2em;
}

.recording-list li + li {
  margin-top: 8px;
}

.recording-list span {
  color: var(--muted);
}

.notes-list,
.portal-note-list {
  display: grid;
  gap: 18px;
}

.recording,
.note-link,
.portal-note-card {
  padding: 0;
}

.recording p,
.note-link p {
  margin-bottom: 0.45em;
}

.portal-note-card {
  display: grid;
  grid-template-columns: 1fr 82px;
  gap: 12px;
  align-items: start;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.portal-note-card:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.portal-note-text {
  display: grid;
  gap: 2px;
  min-width: 0;
  color: var(--ink);
  text-decoration: none;
}

.portal-note-text strong {
  color: var(--ink);
  font-weight: 500;
  line-height: 1.45;
}

.portal-note-text span:last-child {
  color: var(--muted);
  font-size: 0.92rem;
}

.portal-note-card img {
  width: 82px;
  height: 58px;
  object-fit: cover;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
}

.practice-template {
  margin-top: 14px;
}

.practice-template h3 {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 500;
  margin: 0 0 10px;
}

.practice-template dl {
  display: grid;
  gap: 8px;
  margin: 0;
}

.practice-template div {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 12px;
}

.practice-template dt,
.practice-template dd {
  margin: 0;
}

.practice-template dt {
  color: var(--muted);
}

.portal-footer {
  margin-top: 42px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.65;
}

.footer-name {
  margin: 0 0 4px;
  text-align: center;
}

.footer-updated {
  margin: 0;
  text-align: right;
}

@media (max-width: 640px) {
  .schedule-line {
    display: grid;
    gap: 8px;
  }
}

@media (min-width: 760px) {
  .portal-page {
    padding: 34px 24px 60px;
  }

  .definition-list div {
    grid-template-columns: 9rem 1fr;
    gap: 18px;
  }
}