:root {
  --bg: #f3f4f6;
  --panel: #ffffff;
  --panel-soft: #fafafa;
  --line: #d9dde3;
  --line-strong: #c2c8d0;
  --text: #1f2937;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-soft: #e8efff;
  --danger: #d14343;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

button,
input {
  font: inherit;
}

.login-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-panel {
  width: 100%;
  max-width: 360px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.login-title {
  margin: 0 0 6px;
  font-size: 24px;
  font-weight: 600;
}

.login-subtitle {
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 13px;
}

.field {
  margin-bottom: 14px;
}

.field label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  color: var(--muted);
}

.field input {
  width: 100%;
  height: 38px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 0 12px;
  background: #fff;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  padding: 0 14px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
}

.btn:disabled {
  cursor: default;
  opacity: 0.6;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn-ghost {
  background: #fff;
}

.page {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 220px 1fr;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: #eef1f5;
  padding: 16px 0;
}

.brand {
  margin: 0 16px 20px;
}

.brand-title {
  font-size: 18px;
  font-weight: 700;
}

.brand-subtitle {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.nav-label {
  margin: 0 16px 8px;
  font-size: 12px;
  color: var(--muted);
}

.nav-item {
  width: 100%;
  text-align: left;
  border: 0;
  border-left: 3px solid transparent;
  border-radius: 0;
  background: transparent;
  padding: 9px 16px 9px 18px;
  margin-bottom: 0;
  cursor: pointer;
  color: var(--text);
}

.nav-item.active {
  border-left-color: var(--primary);
  background: #e8edf5;
  color: #1748b5;
}

.nav-item + .nav-item {
  margin-top: 2px;
}

.nav-item:hover {
  background: #e9edf3;
}

.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.topbar {
  height: 56px;
  border-bottom: 1px solid var(--line);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.topbar-title {
  font-size: 18px;
  font-weight: 600;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-user {
  font-size: 13px;
  color: var(--muted);
}

.content {
  padding: 20px;
}

.section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.section-title {
  font-size: 16px;
  font-weight: 600;
}

.section-desc {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 16px;
}

.platform-card {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--panel-soft);
}

.platform-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.platform-title {
  font-size: 15px;
  font-weight: 600;
}

.updated-at {
  font-size: 12px;
  color: var(--muted);
}

.platform-body {
  padding: 14px;
}

.field-inline {
  margin-bottom: 14px;
}

.field-inline:last-child {
  margin-bottom: 0;
}

.field-inline label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--muted);
}

.field-inline input {
  width: 100%;
  height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 0 10px;
  background: #fff;
}

.platform-actions {
  display: flex;
  justify-content: flex-end;
  padding: 0 14px 14px;
}

.hint {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px dashed var(--line-strong);
  border-radius: 4px;
  background: #fff;
  font-size: 12px;
  color: var(--muted);
}

.message {
  margin-bottom: 16px;
  padding: 10px 12px;
  border-radius: 4px;
  border: 1px solid transparent;
  font-size: 13px;
}

.message.error {
  background: #fff3f3;
  border-color: #efc0c0;
  color: var(--danger);
}

.message.success {
  background: #eefbf3;
  border-color: #b8e3c4;
  color: #216b3b;
}

.hidden-note {
  margin: 16px 16px 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.filter-bar {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
  background: #fcfcfd;
}

.filter-item label {
  display: block;
  margin-bottom: 6px;
  font-size: 12px;
  color: var(--muted);
}

.filter-item input,
.filter-item select {
  width: 100%;
  height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  padding: 0 10px;
  background: #fff;
}

.filter-actions {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.table-shell {
  padding: 0 16px 16px;
}

.table-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
}

.table-summary-text {
  font-size: 13px;
  color: var(--muted);
}

.table-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.data-table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  background: #fff;
}

.data-table {
  width: 100%;
  min-width: 1160px;
  border-collapse: collapse;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid var(--line);
  padding: 10px 12px;
  vertical-align: top;
  text-align: left;
  font-size: 13px;
}

.data-table th {
  position: sticky;
  top: 0;
  background: #f7f8fa;
  z-index: 1;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}

.data-table tbody tr:hover {
  background: #fafcff;
}

.remote-post-image {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 4px;
  display: block;
  background: #eceff3;
}

.table-empty {
  color: var(--muted);
}

.cell-primary {
  color: var(--text);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.cell-secondary {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--muted);
  font-size: 12px;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 12px;
}

.pagination-info {
  font-size: 12px;
  color: var(--muted);
}

.pagination-actions {
  display: flex;
  gap: 8px;
}

@media (max-width: 980px) {
  .page {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .filter-bar {
    grid-template-columns: 1fr;
  }

  .table-summary,
  .pagination {
    flex-direction: column;
    align-items: stretch;
  }
}