/* Compare page styles – blue theme (matches landing card) */
body.page-compare,
body.page-compare-select {
  --primary: #1e5bc9;
  --primary-hover: #1849a8;
  --primary-muted: rgba(30, 91, 201, 0.12);
}

body.page-compare-select .compare-actions {
  justify-content: center;
}

.container--compare {
  max-width: 1400px;
}

.header--compare {
  margin-bottom: 24px;
}

.header--compare .header-title-link {
  color: inherit;
  text-decoration: none;
}

.header--compare .header-title-link:hover {
  text-decoration: underline;
  color: var(--primary);
}

.header--compare__title-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 4px;
}

.header--compare__title-row h1 {
  margin: 0;
}

.container--compare .btn-new-file {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  background: transparent;
  border: 1px solid var(--primary);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}

.container--compare .btn-new-file:hover {
  background: var(--primary-muted);
  color: var(--primary);
}

.container--compare .btn-new-file__icon {
  font-size: 1rem;
  line-height: 1;
}

.compare-error {
  padding: 24px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  color: var(--danger);
}

.compare-error a {
  color: var(--primary);
}

/* Column selection step before comparison (full container width, centered, same as single check) */
.compare-column-select {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 28px 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.compare-column-select-title {
  margin: 0 0 6px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
}

.compare-column-select-hint {
  margin: 0 0 20px;
  font-size: 0.925rem;
  line-height: 1.5;
  color: var(--text-muted);
}

.compare-key-column-wrap {
  margin-bottom: 16px;
}

.compare-key-column-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.compare-key-column-select {
  min-width: 200px;
  max-width: 100%;
  padding: 10px 14px;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
}

.compare-column-select-search-wrap {
  margin-bottom: 16px;
}

.compare-column-select-search-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.compare-column-select-search {
  width: 100%;
  max-width: 360px;
  padding: 12px 16px;
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  min-height: 44px;
  box-sizing: border-box;
}

.compare-column-select-search:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-muted);
}

.compare-column-select-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 12px;
  margin-bottom: 16px;
}

.compare-column-select-actions .btn-small {
  padding: 10px 16px;
  min-height: 38px;
  font-size: 0.9rem;
}

.compare-column-select-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px 28px;
  max-height: 280px;
  overflow-y: auto;
  padding: 20px 24px;
  margin-bottom: 24px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--bg);
  align-content: start;
}

.compare-column-select-list::-webkit-scrollbar {
  width: 8px;
}

.compare-column-select-list::-webkit-scrollbar-track {
  background: var(--border-light);
  border-radius: 4px;
}

.compare-column-select-list::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 4px;
}

.compare-column-select-empty {
  display: none;
  padding: 14px 20px;
  margin: 0 0 20px;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-align: center;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
}

.compare-column-select-empty.is-visible {
  display: block;
}

.compare-column-select-submit {
  margin-top: 8px;
  min-height: 48px;
  padding: 14px 24px;
}

.compare-column-select-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  line-height: 1.4;
  cursor: pointer;
  padding: 4px 0;
  min-height: 28px;
}

.compare-column-select-item input[type="checkbox"] {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--primary);
}

.compare-summary-card {
  margin-bottom: 16px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.compare-step-indicator {
  margin-bottom: 16px;
}

.compare-primary-action {
  margin: 10px 0 14px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
}

.compare-export-btn {
  min-height: 46px;
  padding: 12px 18px;
  font-weight: 700;
}

.compare-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 12px;
}

.compare-filter {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid #cbd5e1;
  background: #f8fafc;
  color: #475569;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.12s;
}

.compare-filter:hover {
  border-color: #94a3b8;
  color: #334155;
  background: #f1f5f9;
  transform: translateY(-1px);
}

.compare-filter.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.compare-summary-legend {
  display: flex;
  gap: 20px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.compare-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.compare-summary-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 10px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 600;
  border: 2px solid transparent;
  transition: transform 0.15s, box-shadow 0.15s;
}

.compare-summary-badge:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.compare-summary-item--added {
  background: #dcfce7;
  color: #166534;
  border-color: #86efac;
}
.compare-summary-item--added:hover { background: #bbf7d0; }

.compare-summary-item--deleted {
  background: #fee2e2;
  color: #991b1b;
  border-color: #fca5a5;
}
.compare-summary-item--deleted:hover { background: #fecaca; }

.compare-summary-item--changed {
  background: #fef3c7;
  color: #92400e;
  border-color: #fcd34d;
}
.compare-summary-item--changed:hover { background: #fde68a; }

.compare-summary-hint {
  margin: 12px 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

#compareKeyInfo.is-high { color: #166534; font-weight: 700; }
#compareKeyInfo.is-medium { color: #b45309; font-weight: 700; }
#compareKeyInfo.is-low { color: #b91c1c; font-weight: 700; }

.compare-warning-banner {
  margin: 0 0 12px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #fcd34d;
  background: #fffbeb;
  color: #92400e;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.compare-warning-banner__text {
  flex: 1 1 auto;
  font-size: 0.86rem;
  line-height: 1.45;
}

.compare-warning-banner__close {
  border: 1px solid #fcd34d;
  background: #fff;
  color: #92400e;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 700;
  line-height: 1;
}

.compare-legend {
  display: flex;
  gap: 20px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.compare-summary-item {
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
}

.compare-summary-item:hover {
  background: var(--border-light);
}

.compare-summary-rowlist {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.compare-summary-rowlist-title {
  font-weight: 600;
  color: var(--text-muted);
  margin-right: 4px;
}

.compare-summary-rowlink {
  padding: 4px 10px;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-card);
  cursor: pointer;
  font-family: inherit;
  color: var(--primary);
}

.compare-summary-rowlink:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.compare-summary-rowlist-more {
  padding: 4px 10px;
  font-size: 0.85rem;
  border: 1px dashed #94a3b8;
  border-radius: 4px;
  background: #f8fafc;
  color: #334155;
  cursor: pointer;
}

.compare-summary-rowlist-more:hover {
  background: #f1f5f9;
}

.compare-columns-detail {
  margin-bottom: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.compare-columns-summary {
  padding: 12px 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.compare-columns-summary::-webkit-details-marker { display: none; }

.compare-columns-summary::before {
  content: "▶ ";
  font-size: 0.75rem;
  color: var(--text-muted);
}

.compare-columns-detail[open] .compare-columns-summary::before {
  content: "▼ ";
}

.compare-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding: 0 16px 16px;
}

.compare-actions--columns {
  align-items: flex-start;
}

.compare-actions .action-label {
  font-weight: 600;
  color: var(--text-muted);
}

.compare-actions .btn-small,
.compare-summary-badge {
  min-height: 40px;
}

.compare-actions .btn-small {
  padding: 8px 14px;
  font-size: 0.85rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  font-family: inherit;
}

.compare-actions .btn-small:focus-visible,
.compare-summary-badge:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.compare-actions .btn-small:hover {
  background: var(--border-light);
}

.column-visibility {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  max-height: 120px;
  overflow-y: auto;
  padding: 8px 0;
}

.column-visibility-item {
  display: inline-flex;
  align-items: center;
  font-size: 0.85rem;
  cursor: pointer;
  white-space: nowrap;
}

.column-visibility-item input {
  margin: 0 4px 0 0;
  cursor: pointer;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.legend-item i {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

.legend-item--added i { background: #dcfce7; border: 1px solid #86efac; }
.legend-item--deleted i { background: #fee2e2; border: 1px solid #fca5a5; }
.legend-item--changed i { background: #fef3c7; border: 1px solid #fcd34d; }

.compare-table-wrapper {
  overflow: auto;
  max-height: 70vh;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
}

.compare-table {
  width: 100%;
  table-layout: auto;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.compare-table th,
.compare-table td {
  padding: 4px 8px;
  border-bottom: 1px solid var(--border-light);
  text-align: left;
  max-width: 140px;
  min-width: 45px;
  word-break: break-word;
  white-space: normal;
}

.compare-table th {
  background: var(--bg);
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 1;
}

.compare-table tbody tr:hover {
  background: #f8fafc;
}

/* Row status */
.compare-table tr.row--added {
  background: #dcfce7;
}

.compare-table tr.row--added:hover {
  background: #bbf7d0;
}

.compare-table tr.row--deleted {
  background: #fee2e2;
}

.compare-table tr.row--deleted:hover {
  background: #fecaca;
}

.compare-table tr.row--changed td.cell--changed {
  background: #fef3c7;
  vertical-align: top;
}

.cell--changed .cell-old-value {
  display: none;
}

.cell--changed .cell-new-value {
  display: none;
  font-weight: 500;
}

.compare-table td.cell--changed {
  position: relative;
}

.compare-table td.cell--changed::before {
  content: "";
  position: absolute;
  top: 4px;
  right: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #f59e0b;
}

.compare-table td.cell--changed[data-before-label]::after {
  content: attr(data-before-label);
  position: absolute;
  left: 8px;
  bottom: calc(100% + 8px);
  max-width: min(340px, 60vw);
  background: rgba(15, 23, 42, 0.95);
  color: #fff;
  padding: 6px 8px;
  border-radius: 6px;
  font-size: 0.78rem;
  line-height: 1.35;
  white-space: normal;
  opacity: 0;
  transform: translateY(4px);
  pointer-events: none;
  transition: opacity 0.12s ease, transform 0.12s ease;
  z-index: 10;
}

.compare-table td.cell--changed:hover::after {
  opacity: 1;
  transform: translateY(0);
}

.compare-export-bottom {
  margin-top: 14px;
  display: flex;
  justify-content: flex-end;
}

.compare-jump-export {
  border: none;
  background: transparent;
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0;
  margin-bottom: 8px;
  cursor: pointer;
}

.compare-jump-export:hover {
  text-decoration: underline;
}

.compare-error-countdown {
  margin-top: 8px;
  font-size: 0.85rem;
  color: #7f1d1d;
}

/* Deleted row message */
.col-deleted-msg {
  font-style: italic;
  color: var(--danger);
  font-weight: 500;
}

.col-status {
  min-width: 70px;
  font-size: 0.75rem;
  font-weight: 600;
}

.col-status--added { color: var(--success); }
.col-status--deleted { color: var(--danger); }
.col-status--changed { color: var(--warning); }

/* Temporarily highlight row when navigated via row number click */
.compare-table tr.row--highlight td {
  background: #dbeafe !important;
  box-shadow: inset 0 0 0 2px var(--primary);
}

.compare-table th.table-empty-message,
.compare-table td.table-empty-message {
  text-align: center;
  color: var(--text-muted);
  font-weight: normal;
  padding: 32px 16px;
  border: none;
  background: var(--bg) !important;
}

/* ===== How it Works (이용 가이드) 섹션 - 인터랙티브 ===== */
.how-it-works {
  margin-top: 48px;
  padding: 40px 24px 48px;
  background: linear-gradient(180deg, #f0f9ff 0%, #f8fafc 100%);
  border-radius: var(--radius);
}

.how-it-works__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-align: center;
  margin: 0 0 24px;
}

.how-it-works__grid {
  max-width: 900px;
  margin: 0 auto 32px;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 16px;
  align-items: stretch;
}

@media (max-width: 768px) {
  .how-it-works__grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .how-it-works__arrow {
    display: none;
  }
}

.how-it-works__card {
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  background: var(--bg-card);
  border: 2px solid var(--border-light);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.how-it-works__card:hover {
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(30, 91, 201, 0.15);
}

.how-it-works__card.is-active {
  border-color: var(--primary);
  background: var(--primary-muted);
  box-shadow: 0 4px 12px rgba(30, 91, 201, 0.2);
}

.how-it-works__card .how-it-works__step { margin-bottom: 0; }
.how-it-works__card .how-it-works__desc { margin: 0; font-size: 0.8125rem; }

.how-it-works__step {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.how-it-works__card-title { font-size: 1rem; font-weight: 600; color: var(--text); margin: 0; }
.how-it-works__desc { font-size: 0.875rem; color: var(--text-muted); line-height: 1.45; }
.how-it-works__arrow { color: var(--text-muted); font-size: 1.25rem; align-self: center; }

.how-it-works__detail {
  margin-left: -24px;
  margin-right: -24px;
  padding: 24px 24px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.how-it-works__detail-heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  margin: 0 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.how-it-works__detail-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

@media (max-width: 768px) {
  .how-it-works__detail { margin-left: -16px; margin-right: -16px; padding: 20px 16px 24px; }
  .how-it-works__detail-inner { grid-template-columns: 1fr; gap: 20px; }
}

.how-it-works__detail-media {
  min-height: 200px;
  background: #f1f5f9;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  touch-action: none;
}

.how-it-works__zoom-wrap {
  width: 100%;
  height: 100%;
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: move;
  touch-action: none;
}

.how-it-works__detail-img {
  display: block;
  max-width: 100%;
  height: auto;
  max-height: 70vh;
  object-fit: contain;
  user-select: none;
  pointer-events: none;
}

.how-it-works__detail-body { min-width: 0; }
.how-it-works__detail-step {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.how-it-works__detail-title { font-size: 1.125rem; font-weight: 600; color: var(--text); margin: 0 0 12px; }
.how-it-works__detail-text { font-size: 0.9375rem; color: var(--text-muted); line-height: 1.6; }
.how-it-works__detail-text p { margin: 0 0 12px; }
.how-it-works__detail-text p:last-child { margin-bottom: 0; }