.latex-renderer-ui {
  --color-primary: #7c3aed;
  --color-primary-hover: #6d28d9;
  --color-accent: #06b6d4;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-bg-card: rgba(255, 255, 255, 0.9);
  --color-border: #e2e8f0;
  --color-text-main: #0f172a;
  --color-text-muted: #64748b;
  --color-text-code: #6d28d9;
  --color-bg-input: #fff;
  --color-bg-preview: #f8fafc;
  --color-bg-actions: #f1f5f9;
  --color-white: #fff;
  --shadow-main: rgba(0, 0, 0, 0.06);
  --shadow-preview: rgba(124, 58, 237, 0.08);
}

.theme-dark .latex-renderer-ui {
  --color-bg-card: #1e1e2e;
  --color-border: #313244;
  --color-text-main: #cdd6f4;
  --color-text-muted: #a6adc8;
  --color-text-code: #cba6f7;
  --color-bg-input: #11111b;
  --color-bg-preview: #181825;
  --color-bg-actions: #1e1e2e;
  --color-white: #fff;
  --shadow-main: rgba(0, 0, 0, 0.3);
  --shadow-preview: rgba(124, 58, 237, 0.15);
}

.latex-renderer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 2rem;
  background: var(--color-bg-card);
  border-radius: 1.5rem;
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px var(--shadow-main);
  transition: all 0.3s ease;
}

.editor-panel {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.panel-section {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.panel-section:not(:last-child) {
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.latex-textarea {
  width: 100%;
  min-height: 180px;
  padding: 1rem;
  background: var(--color-bg-input);
  border: 1.5px solid var(--color-border);
  border-radius: 0.875rem;
  color: var(--color-text-main);
  font-size: 0.95rem;
  line-height: 1.7;
  resize: vertical;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}

.latex-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--shadow-preview);
}

.mode-toggle-row {
  display: flex;
  gap: 0.5rem;
}

.mode-btn {
  flex: 1;
  padding: 0.5rem 1rem;
  border-radius: 0.625rem;
  border: 1.5px solid var(--color-border);
  background: var(--color-bg-input);
  color: var(--color-text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.mode-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.mode-btn.mode-active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.font-size-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.font-size-row input[type="range"] {
  flex: 1;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.font-size-display {
  min-width: 3rem;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-main);
}

.btn-reset-small {
  width: 100%;
  padding: 0.625rem 1rem;
  background: transparent;
  border: 1.5px solid var(--color-border);
  border-radius: 0.75rem;
  color: var(--color-text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-reset-small:hover {
  border-color: var(--color-error);
  color: var(--color-error);
}

.preview-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.preview-title {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.preview-badge {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.625rem;
  background: var(--color-primary);
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.04em;
}

.preview-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-white);
  opacity: 0.8;
  animation: pulse-dot 1.8s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%,
  100% {
    opacity: 0.8;
    transform: scale(1);
  }
  50% {
    opacity: 0.3;
    transform: scale(0.75);
  }
}

.preview-box {
  flex: 1;
  min-height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: var(--color-bg-preview);
  border: 1.5px solid var(--color-border);
  border-radius: 1.25rem;
  box-shadow: 0 4px 20px var(--shadow-preview);
  overflow: auto;
  position: relative;
  transition: all 0.2s;
}

.preview-empty-hint {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-style: italic;
  text-align: center;
}

.preview-error-banner {
  padding: 0.875rem 1rem;
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 0.75rem;
  color: var(--color-error);
  font-size: 0.85rem;
  overflow-wrap: anywhere;
  display: none;
}

.actions-bar {
  display: flex;
  gap: 0.75rem;
  padding: 1.25rem;
  background: var(--color-bg-actions);
  border-radius: 1rem;
  border: 1px solid var(--color-border);
}

.action-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  border: 1.5px solid transparent;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.action-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.action-btn-png {
  background: var(--color-primary);
  color: var(--color-white);
}

.action-btn-png:not(:disabled):hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--shadow-preview);
}

.action-btn-md {
  background: var(--color-bg-input);
  border-color: var(--color-border);
  color: var(--color-text-main);
}

.action-btn-md:not(:disabled):hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.action-btn-latex {
  background: var(--color-bg-input);
  border-color: var(--color-border);
  color: var(--color-text-code);
}

.action-btn-latex:not(:disabled):hover {
  border-color: var(--color-text-code);
  box-shadow: 0 2px 8px var(--shadow-main);
}

.latex-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  padding: 0.75rem 1.25rem;
  background: var(--color-success);
  color: var(--color-white);
  border-radius: 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
  opacity: 0;
  transform: translateY(0.5rem);
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  z-index: 100;
}

.latex-toast.toast-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .latex-renderer-container {
    grid-template-columns: 1fr;
    padding: 1.25rem;
  }
}

@keyframes view-fade-in {
  from {
    opacity: 0;
    transform: translateY(0.5rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.view-fade-in {
  animation: view-fade-in 0.35s ease both;
}