:root {
  --settings-grid-gap: 1.25rem;
  --settings-card-bg: var(--card-background, #ffffff);
  --settings-card-border: rgba(0, 0, 0, 0.08);
  --settings-card-shadow: var(--shadow-sm, 0 6px 18px rgba(15, 23, 42, 0.08));
  --settings-card-shadow-dark: 0 6px 18px rgba(0, 0, 0, 0.45);
  --settings-muted: rgba(60, 64, 67, 0.8);
  --settings-accent: var(--accent-color, #0078ff);
  --settings-accent-bg: rgba(0, 120, 255, 0.12);
  --settings-border-radius: 16px;
}

.page-content {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
  padding-bottom: 4rem;
}

.reference-tabs {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.5rem;
  border-radius: var(--settings-border-radius);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), rgba(99, 102, 241, 0.1));
  border: 1px solid rgba(59, 130, 246, 0.12);
}

body.dark-mode .reference-tabs {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.16), rgba(139, 92, 246, 0.18));
  border-color: rgba(99, 102, 241, 0.25);
}

.tab-buttons {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tab-button {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.65rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: rgba(59, 130, 246, 0.12);
  color: inherit;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.tab-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.15);
}

.tab-button.is-active {
  background: var(--settings-accent);
  color: #ffffff;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
}

body.dark-mode .tab-button {
  background: rgba(96, 165, 250, 0.18);
  border-color: rgba(148, 163, 184, 0.2);
}

body.dark-mode .tab-button.is-active {
  background: #60a5fa;
  border-color: #60a5fa;
  color: #0f172a;
}

body.dark-mode {
  --settings-muted: rgba(203, 213, 225, 0.78);
}

.tab-hint {
  margin: 0;
  line-height: 1.6;
}

.tab-hint code,
.panel-intro code {
  font-size: 0.95em;
}

.reference-panel {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.panel-intro {
  line-height: 1.6;
}

.panel-context {
  margin: 0;
  font-size: 0.95rem;
  color: var(--settings-muted);
}

.reference-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  margin-top: 1.5rem;
}

.reference-controls .control {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 220px;
}

.control-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--settings-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.setting-search,
.group-select {
  border: 1px solid var(--settings-card-border);
  background: var(--settings-card-bg);
  border-radius: 10px;
  padding: 0.6rem 0.75rem;
  font-size: 1rem;
  color: inherit;
  outline: none;
  box-shadow: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}

.setting-search:focus,
.group-select:focus {
  border-color: var(--settings-accent);
  box-shadow: 0 0 0 3px var(--settings-accent-bg);
}

.refresh-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.55rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--settings-accent);
  color: #ffffff;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.refresh-button:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(0, 120, 255, 0.25);
}

.refresh-button:active {
  transform: translateY(0);
}

.refresh-button:disabled {
  opacity: 0.6;
  cursor: progress;
  box-shadow: none;
}

.refresh-icon {
  font-size: 1.2rem;
  line-height: 1;
}

.loading-state {
  display: grid;
  justify-items: center;
  gap: 0.75rem;
  padding: 4rem 0;
  text-align: center;
  color: var(--settings-muted);
}

.spinner {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-top-color: var(--settings-accent);
  animation: settings-spin 0.8s linear infinite;
}

@keyframes settings-spin {
  to {
    transform: rotate(360deg);
  }
}

.settings-root {
  margin-bottom: 4rem;
}

.settings-section {
  margin-bottom: 3rem;
}

.settings-section:last-of-type {
  margin-bottom: 2rem;
}

.settings-section-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.settings-section-title {
  font-size: 1.65rem;
  font-weight: 700;
  margin: 0;
}

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

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--settings-grid-gap);
}

.setting-card {
  background: var(--settings-card-bg);
  border-radius: var(--settings-border-radius);
  border: 1px solid var(--settings-card-border);
  padding: 1.35rem 1.25rem;
  box-shadow: var(--settings-card-shadow);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.setting-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.18);
}

body.dark-mode .setting-card {
  background: rgba(15, 23, 42, 0.9);
  box-shadow: var(--settings-card-shadow-dark);
  border-color: rgba(255, 255, 255, 0.08);
}

.setting-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
}

.setting-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
  line-height: 1.4;
}

.setting-key {
  font-size: 0.8rem;
  background: rgba(148, 163, 184, 0.16);
  color: inherit;
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  font-family: var(--font-mono, Consolas, 'SFMono-Regular', Menlo, monospace);
  white-space: nowrap;
}

.setting-description {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: inherit;
}

.setting-description.placeholder {
  font-style: italic;
  color: var(--settings-muted);
}

.setting-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.6rem 1.2rem;
}

.setting-meta dt {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--settings-muted);
}

.setting-meta dd {
  margin: 0.2rem 0 0;
  font-size: 0.92rem;
  color: inherit;
}

.parameter-section-description {
  margin: -0.25rem 0 1.5rem;
  font-size: 0.95rem;
  color: var(--settings-muted);
}

.parameter-card .setting-key {
  font-size: 0.78rem;
}

.parameter-card .setting-description {
  margin-bottom: 0.75rem;
}

.parameter-meta {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}

.parameter-meta dd {
  font-family: var(--font-mono, Consolas, 'SFMono-Regular', Menlo, monospace);
  font-size: 0.88rem;
}

.setting-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.setting-badge {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.2);
  color: inherit;
}

.setting-badge.status-defined {
  background: rgba(16, 185, 129, 0.18);
  color: rgb(5, 150, 105);
}

.setting-badge.status-placeholder {
  background: rgba(251, 191, 36, 0.18);
  color: rgb(180, 83, 9);
}

body.dark-mode .setting-badge.status-defined {
  background: rgba(16, 185, 129, 0.28);
  color: rgb(110, 231, 183);
}

body.dark-mode .setting-badge.status-placeholder {
  background: rgba(251, 191, 36, 0.25);
  color: rgb(251, 191, 36);
}

.settings-empty {
  padding: 3rem;
  text-align: center;
  border: 1px dashed var(--settings-card-border);
  border-radius: var(--settings-border-radius);
  color: var(--settings-muted);
}

.page-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(148, 163, 184, 0.08);
}

.page-footer p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--settings-muted);
}

@media (max-width: 768px) {
  .settings-controls {
  align-items: stretch;
  }

  .reference-controls .control {
    min-width: 100%;
  }
}