* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: #f5f5f5; color: #333; }

#errata-app { max-width: 1400px; margin: 0 auto; padding: 24px 16px; }

.errata-header { text-align: center; margin-bottom: 32px; }
.errata-header h1 { font-size: 28px; color: #1a3a5c; margin-bottom: 8px; }
.errata-header p { color: #666; font-size: 15px; }

/* Filter bar */
.errata-filters {
  background: #fff; border-radius: 8px; padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1); margin-bottom: 24px;
}
.filter-section { margin-bottom: 16px; }
.filter-section:last-child { margin-bottom: 0; }
.filter-section label { display: block; font-size: 13px; font-weight: 600; color: #555; margin-bottom: 8px; }
.filter-dropdowns {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.filter-group label { display: block; font-size: 13px; font-weight: 600; color: #555; margin-bottom: 4px; }
.filter-group select {
  width: 100%; padding: 8px 12px; border: 1px solid #ccc; border-radius: 4px;
  font-size: 14px; background: #fff; cursor: pointer;
}
.filter-group select:focus { border-color: #1a3a5c; outline: none; box-shadow: 0 0 0 2px rgba(26,58,92,0.2); }

/* Domain buttons (matching errata sheet style) */
.domain-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.domain-pill {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  min-width: 156px;
  padding: 10px 20px 10px 12px; border-radius: 24px;
  border: 2px solid transparent;
  background: var(--domain-color, #666);
  color: #fff; cursor: pointer; font-size: 16px; font-weight: 600;
  transition: border-color 0.15s, opacity 0.15s;
  user-select: none; outline: none;
}
.domain-pill:hover { box-shadow: 0 0 0 3px #202d5e; }
.domain-pill.active {
  box-shadow: 0 0 0 3px #202d5e;
}
.domain-pill.disabled {
  cursor: not-allowed;
}
.domain-pill.unavailable {
  opacity: 0.2;
}
.domain-pill .pill-icon {
  width: 28px; height: 28px; flex-shrink: 0;
}

/* Status bar */
.errata-status {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; font-size: 14px; color: #666;
}
.errata-status .live-badge {
  background: #e8f5e9; color: #2e7d32; padding: 4px 10px;
  border-radius: 12px; font-size: 12px; font-weight: 600;
}

/* Multi-column layout */
.errata-columns {
  display: grid; gap: 16px;
  grid-template-columns: 1fr;
}
.errata-columns.cols-2 { grid-template-columns: 1fr 1fr; }
.errata-columns.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.errata-columns.cols-many {
  display: flex; overflow-x: auto; gap: 16px;
  scroll-snap-type: x mandatory; padding-bottom: 8px;
}
.errata-columns.cols-many .errata-column {
  min-width: 320px; flex-shrink: 0; scroll-snap-align: start;
}

.errata-column-header {
  padding: 12px 16px;
  font-size: 16px; font-weight: 700;
  border-radius: 8px 8px 0 0;
  position: sticky; top: 0; z-index: 10;
  display: flex; justify-content: space-between; align-items: center;
}
.errata-column-header .count-badge {
  font-size: 13px; font-weight: 400; opacity: 0.85;
}

/* Errata cards */
.errata-card {
  background: #fff; margin-bottom: 12px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08); overflow: hidden;
}
.errata-card:last-child { margin-bottom: 0; }
.errata-card-header {
  background: #f0f0f0; color: #333; padding: 10px 14px;
  font-size: 13px; font-weight: 600;
}
.errata-card-body {
  display: grid; grid-template-columns: 1fr 1fr; min-height: 60px;
}
.errata-error, .errata-correction { padding: 12px 14px; }
.errata-error { background: #fff8f8; border-right: 1px solid #eee; }
.errata-correction { background: #f8fff8; }
.errata-label {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.5px; margin-bottom: 6px;
}
.errata-error .errata-label { color: #c62828; }
.errata-correction .errata-label { color: #2e7d32; }
.errata-text { font-size: 13px; line-height: 1.5; }
.errata-image { margin-top: 8px; max-width: 100%; border-radius: 4px; cursor: pointer; }

/* In 3-column mode, stack error/correction vertically */
.errata-columns.cols-3 .errata-card-body { grid-template-columns: 1fr; }
.errata-columns.cols-3 .errata-error { border-right: none; border-bottom: 1px solid #eee; }

.errata-img-fail { display: block; margin-top: 8px; color: #999; font-size: 12px; }

.errata-empty {
  text-align: center; padding: 48px 24px; color: #999;
  background: #fff; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}
.errata-empty h3 { margin-bottom: 8px; color: #666; }
.errata-empty-col {
  text-align: center; padding: 24px 16px; color: #999;
  background: #fff; font-size: 14px;
}

.errata-loading { text-align: center; padding: 48px; color: #666; }

.show-more-btn {
  display: block; width: 100%; padding: 10px;
  background: #f0f0f0; border: 1px solid #ddd; border-radius: 4px;
  cursor: pointer; font-size: 13px; color: #555; text-align: center;
  margin-top: 8px;
}
.show-more-btn:hover { background: #e8e8e8; }

@media (max-width: 768px) {
  .errata-columns.cols-2,
  .errata-columns.cols-3 { grid-template-columns: 1fr; }
  .errata-columns.cols-3 .errata-card-body { grid-template-columns: 1fr 1fr; }
  .errata-card-body { grid-template-columns: 1fr 1fr; }
  .filter-dropdowns { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .errata-card-body { grid-template-columns: 1fr; }
  .errata-error { border-right: none; border-bottom: 1px solid #eee; }
  .errata-columns.cols-3 .errata-card-body { grid-template-columns: 1fr; }
}