.csat-background-page {
  display: grid;
  gap: 24px;
  min-width: 0;
}

.csat-background-header {
  display: grid;
  gap: 8px;
}

.csat-progress {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: baseline;
  margin-top: 8px;
  color: var(--rm-text-secondary);
  font-size: 13px;
}

.csat-progress strong {
  color: var(--rm-green-800);
  font-size: 22px;
}

.csat-domain-filters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 8px;
  padding: 16px;
  border: 1px solid var(--rm-border);
  border-radius: var(--rm-radius);
  background: var(--rm-surface);
  box-shadow: var(--rm-shadow-soft);
}

.csat-domain-filter {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  min-width: 0;
  min-height: 48px;
  padding: 8px 12px;
  border: 1px solid var(--rm-border);
  border-radius: 8px;
  background: var(--rm-surface-muted);
  color: var(--rm-text-secondary);
  font: inherit;
  cursor: pointer;
}

.csat-domain-filter span {
  min-width: 0;
  font-size: 13px;
  font-weight: 800;
  word-break: keep-all;
}

.csat-domain-filter strong {
  flex: 0 0 auto;
  font-size: 12px;
}

.csat-domain-filter:hover,
.csat-domain-filter:focus-visible {
  border-color: var(--rm-primary);
  color: var(--rm-primary-dark);
}

.csat-domain-filter.is-active {
  border-color: var(--rm-green-700);
  background: var(--rm-green-700);
  color: var(--rm-surface);
}

.csat-domain-filter:disabled {
  color: var(--rm-text-tertiary);
  cursor: not-allowed;
}

.csat-domain-filter:focus-visible,
.csat-topic-cover:focus-visible,
.csat-topic-content a:focus-visible,
.csat-topic-meta a:focus-visible {
  outline: 2px solid var(--rm-primary);
  outline-offset: 2px;
}

.csat-domain-stack {
  display: grid;
  gap: 24px;
  min-width: 0;
}

.csat-domain-section {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--rm-border);
  border-radius: var(--rm-radius);
  background: var(--rm-surface);
  box-shadow: var(--rm-shadow);
}

.csat-domain-heading {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--rm-border);
  background: var(--rm-surface-muted);
}

.csat-domain-heading p,
.csat-domain-heading h2 {
  margin: 0;
}

.csat-domain-heading p {
  color: var(--rm-gold-700);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
}

.csat-domain-heading h2 {
  color: var(--rm-green-900);
  font-size: 22px;
  line-height: 1.3;
}

.csat-domain-heading > strong {
  color: var(--rm-text-secondary);
  font-size: 13px;
}

.csat-topic-list {
  min-width: 0;
}

.csat-topic-row {
  display: grid;
  grid-template-columns: 58px 112px minmax(0, 1fr) 142px;
  gap: 16px;
  align-items: center;
  min-width: 0;
  padding: 18px 24px;
}

.csat-topic-row + .csat-topic-row {
  border-top: 1px solid var(--rm-border);
}

.csat-topic-order {
  color: var(--rm-text-tertiary);
  font-family: var(--rm-mono);
  font-size: 11px;
  font-weight: 800;
}

.csat-topic-cover {
  display: grid;
  place-items: center;
  width: 112px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--rm-border);
  border-radius: 8px;
  background: var(--rm-surface-muted);
  color: var(--rm-text-secondary);
  text-decoration: none;
}

.csat-topic-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.csat-topic-cover--empty span {
  padding: 8px;
  font-size: 11px;
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
}

.csat-topic-content {
  min-width: 0;
}

.csat-topic-id,
.csat-topic-english,
.csat-topic-description {
  margin: 0;
}

.csat-topic-id {
  color: var(--rm-gold-700);
  font-family: var(--rm-mono);
  font-size: 11px;
  font-weight: 800;
}

.csat-topic-content h3 {
  margin: 3px 0;
  color: var(--rm-green-900);
  font-size: 17px;
  line-height: 1.4;
  overflow-wrap: anywhere;
  word-break: keep-all;
}

.csat-topic-content h3 a {
  color: inherit;
  text-decoration: none;
}

.article-title {
  word-break: keep-all;
  overflow-wrap: break-word;
}

.article-description {
  word-break: keep-all;
  overflow-wrap: break-word;
}

.csat-topic-content h3 a:hover {
  color: var(--rm-gold-700);
}

.csat-topic-english,
.csat-topic-description {
  color: var(--rm-text-secondary);
  font-size: 13px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.csat-topic-description {
  margin-top: 6px;
}

.csat-topic-meta {
  display: grid;
  gap: 5px;
  align-content: center;
  min-width: 0;
  color: var(--rm-text-tertiary);
  font-size: 11px;
  font-weight: 700;
}

.csat-topic-meta .is-ready {
  color: var(--rm-green-700);
}

.csat-topic-meta a {
  justify-self: start;
  min-height: 44px;
  margin-top: 3px;
  padding: 9px 0;
  color: var(--rm-green-800);
  font-size: 13px;
  font-weight: 800;
  text-decoration: none;
}

.csat-topic-meta a:hover {
  color: var(--rm-gold-700);
}

.csat-background-empty p {
  margin-bottom: 0;
}

@media screen and (max-width: 800px) {
  .csat-topic-row {
    grid-template-columns: 48px 96px minmax(0, 1fr);
  }

  .csat-topic-cover {
    width: 96px;
  }

  .csat-topic-meta {
    grid-column: 3;
    grid-template-columns: repeat(3, minmax(0, max-content));
  }

  .csat-topic-meta a {
    grid-column: 1 / -1;
  }
}

@media screen and (max-width: 720px) {
  .csat-domain-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .csat-topic-row {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 18px;
  }

  .csat-topic-cover {
    width: 100%;
    max-height: 180px;
    aspect-ratio: 16 / 9;
  }

  .csat-topic-meta {
    grid-column: auto;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .csat-domain-filter,
  .csat-topic-content a,
  .csat-topic-meta a {
    transition: none;
  }
}