/* ==========================================================================
   LUMINA AGENT INTERFACE - Clean, Modern Chat UI
   ========================================================================== */

:root {
  --agent-purple: rgba(139, 92, 246, 0.15);
  --agent-purple-border: rgba(139, 92, 246, 0.3);
  --agent-blue: rgba(59, 130, 246, 0.15);
  --agent-blue-border: rgba(59, 130, 246, 0.3);
  --agent-success: #10b981;
  --agent-error: #ef4444;
}

/* ==========================================================================
   PAGE LAYOUT - Fixed viewport, no page scroll
   ========================================================================== */
.agent-page {
  height: 100vh;
  height: 100dvh; /* Dynamic viewport height - accounts for mobile browser chrome */
  display: flex;
  flex-direction: column;
  padding-top: 80px;
  background: var(--deep-space);
  overflow: hidden;
}

.agent-page > .container {
  flex: 1;
  display: flex;
  flex-direction: column;
  max-width: 1400px;
  min-height: 0; /* Critical: allows flex child to shrink */
  padding-bottom: 1rem;
}

/* ==========================================================================
   TWO-COLUMN LAYOUT: Chat + Panel
   ========================================================================== */
.agent-layout {
  flex: 1;
  display: flex;
  gap: 1rem;
  min-height: 0;
}

/* Header - Fixed size, doesn't shrink */
.agent-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  margin-bottom: 1rem;
  flex-shrink: 0;
}

.agent-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.agent-icon {
  font-size: 1.5rem;
  color: var(--candlelight);
}

.agent-title h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-primary);
  margin: 0;
}

.agent-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-sm {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: 0.5rem;
  transition: all 0.15s ease;
}

.btn-secondary {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-secondary);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
}

/* ==========================================================================
   CHAT CONTAINER - Fills available space, internal scroll
   ========================================================================== */
.agent-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 1rem;
  min-height: 0; /* Critical: allows flex child to shrink below content size */
  min-width: 0;
  overflow: hidden;
}

/* ==========================================================================
   PANEL - Right side content panel
   ========================================================================== */
.agent-panel {
  width: 380px;
  flex-shrink: 0;
  display: none;
  flex-direction: column;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 1rem;
  overflow: hidden;
}

.agent-panel.visible {
  display: flex;
}

.panel-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: rgba(0,0,0,0.2);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  flex-shrink: 0;
}

.panel-icon {
  font-size: 1rem;
}

.panel-title {
  flex: 1;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.panel-close {
  background: none;
  border: none;
  color: var(--text-tertiary);
  font-size: 1.25rem;
  cursor: pointer;
  padding: 0.25rem;
  line-height: 1;
}

.panel-close:hover {
  color: var(--text-primary);
}

.panel-content {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  min-height: 0;
}

.panel-content::-webkit-scrollbar {
  width: 6px;
}

.panel-content::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.15);
  border-radius: 3px;
}

.panel-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.875rem;
  padding: 2rem;
}

/* Panel content styling - reuse markdown styles */
.panel-content h1,
.panel-content h2,
.panel-content h3 {
  color: var(--text-primary);
  margin: 1rem 0 0.5rem 0;
  font-weight: 600;
}

.panel-content h1:first-child,
.panel-content h2:first-child,
.panel-content h3:first-child {
  margin-top: 0;
}

.panel-content h1 { font-size: 1.25rem; }
.panel-content h2 { font-size: 1.125rem; }
.panel-content h3 { font-size: 1rem; }

.panel-content p {
  margin: 0.5rem 0;
  color: var(--text-secondary);
  line-height: 1.6;
}

.panel-content ul {
  margin: 0.5rem 0;
  padding-left: 1.25rem;
  list-style: disc;
}

.panel-content li {
  margin: 0.25rem 0;
  color: var(--text-secondary);
}

.panel-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.75rem 0;
  font-size: 0.875rem;
}

.panel-content th,
.panel-content td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.panel-content th {
  color: var(--text-primary);
  font-weight: 600;
  background: rgba(255,255,255,0.03);
}

.panel-content td {
  color: var(--text-secondary);
}

.panel-content code {
  background: rgba(255,255,255,0.1);
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.8125rem;
}

.panel-content pre {
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 0.5rem;
  padding: 0.75rem;
  margin: 0.75rem 0;
  overflow-x: auto;
}

.panel-content pre code {
  background: none;
  padding: 0;
}

/* Panel type indicators */
.panel-type-notes .panel-header {
  border-left: 3px solid #10b981;
}

.panel-type-artifact .panel-header {
  border-left: 3px solid var(--candlelight);
}

.panel-type-comparison .panel-header {
  border-left: 3px solid #3b82f6;
}

/* ==========================================================================
   MESSAGES AREA - Scrolls internally
   ========================================================================== */
.messages-container {
  flex: 1;
  min-height: 0; /* Critical: allows scrolling instead of growing */
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.messages-container::-webkit-scrollbar {
  width: 6px;
}

.messages-container::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.15);
  border-radius: 3px;
}

.messages-container::-webkit-scrollbar-thumb:hover {
  background: var(--candlelight);
}

/* Welcome Message */
.welcome-message {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 1rem;
  max-width: 600px;
  margin: auto;
}

.agent-avatar {
  width: 48px;
  height: 48px;
  background: var(--candlelight);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--deep-space);
  flex-shrink: 0;
}

.welcome-content h2 {
  font-size: 1.25rem;
  color: var(--candlelight);
  margin: 0 0 0.75rem 0;
}

.welcome-content p {
  color: var(--text-secondary);
  margin: 0 0 0.75rem 0;
  line-height: 1.5;
}

.welcome-content ul {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem 0;
}

.welcome-content li {
  color: var(--text-secondary);
  padding: 0.25rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.welcome-content li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--candlelight);
}

/* ==========================================================================
   MESSAGE BUBBLES
   ========================================================================== */
.user-message,
.agent-message {
  display: flex;
  gap: 0.75rem;
  max-width: 85%;
}

.user-message {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.agent-message {
  align-self: flex-start;
}

.message-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.user-message .message-avatar {
  background: rgba(255,255,255,0.1);
  color: var(--text-secondary);
}

.agent-message .message-avatar {
  background: var(--candlelight);
  color: var(--deep-space);
}

.message-content {
  padding: 0.875rem 1.25rem;
  border-radius: 1rem;
  line-height: 1.5;
}

.user-message .message-content {
  background: rgba(255,255,255,0.08);
  color: var(--text-primary);
  border-bottom-right-radius: 0.25rem;
}

.agent-message .message-content {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  color: var(--text-primary);
  border-bottom-left-radius: 0.25rem;
}

.message-text {
  white-space: pre-wrap;
  word-break: break-word;
}

/* Markdown Content Styling */
.agent-content {
  line-height: 1.6;
}

.agent-content h1,
.agent-content h2,
.agent-content h3,
.agent-content h4 {
  color: var(--text-primary);
  margin: 1rem 0 0.5rem 0;
  font-weight: 600;
}

.agent-content h1 { font-size: 1.5rem; }
.agent-content h2 { font-size: 1.25rem; }
.agent-content h3 { font-size: 1.125rem; }
.agent-content h4 { font-size: 1rem; }

.agent-content h1:first-child,
.agent-content h2:first-child,
.agent-content h3:first-child,
.agent-content h4:first-child {
  margin-top: 0;
}

.agent-content p {
  margin: 0.5rem 0;
}

.agent-content ul {
  margin: 0.5rem 0;
  padding-left: 1.5rem;
  list-style: disc;
}

.agent-content li {
  margin: 0.25rem 0;
  color: var(--text-secondary);
}

.agent-content code {
  background: rgba(255,255,255,0.1);
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 0.875em;
}

.agent-content pre {
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 0.5rem;
  padding: 1rem;
  margin: 0.75rem 0;
  overflow-x: auto;
}

.agent-content pre code {
  background: none;
  padding: 0;
  font-size: 0.8125rem;
  line-height: 1.5;
}

.agent-content blockquote {
  border-left: 3px solid var(--candlelight);
  margin: 0.75rem 0;
  padding-left: 1rem;
  color: var(--text-secondary);
  font-style: italic;
}

.agent-content hr {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.1);
  margin: 1rem 0;
}

.agent-content a {
  color: var(--candlelight);
  text-decoration: none;
}

.agent-content a:hover {
  text-decoration: underline;
}

.agent-content strong {
  color: var(--text-primary);
  font-weight: 600;
}

.agent-content em {
  font-style: italic;
}

/* ==========================================================================
   UI CONTROLS - LLM-controlled interface elements
   ========================================================================== */
.agent-ui-controls {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

/* Action buttons */
.agent-actions-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.agent-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1rem;
  background: var(--candlelight);
  color: var(--deep-space);
  border: none;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.agent-action-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(255, 215, 18, 0.3);
}

/* Suggestion chips */
.agent-suggestions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.suggestions-label {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-right: 0.25rem;
}

.suggestion-chip {
  padding: 0.375rem 0.75rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 1rem;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.suggestion-chip:hover {
  background: rgba(255,255,255,0.1);
  border-color: var(--candlelight);
  color: var(--text-primary);
}

/* Navigation suggestion */
.agent-navigate {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: rgba(255,255,255,0.03);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.navigate-link {
  color: var(--candlelight);
  text-decoration: none;
}

.navigate-link:hover {
  text-decoration: underline;
}

.message-time {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: 0.5rem;
}

/* ==========================================================================
   THINKING BLOCK
   ========================================================================== */
.agent-thinking {
  background: var(--agent-purple);
  border: 1px solid var(--agent-purple-border);
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.thinking-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  cursor: pointer;
}

.thinking-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.thinking-icon {
  font-size: 1rem;
}

.thinking-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.thinking-time {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.thinking-toggle {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 0.25rem;
}

.thinking-content {
  padding: 0 1rem 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.agent-thinking.collapsed .thinking-content {
  display: none;
}

.agent-thinking.streaming .thinking-content::after {
  content: '▋';
  animation: blink 1s infinite;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ==========================================================================
   PLAN EXECUTION BLOCK
   ========================================================================== */
.agent-plan {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
  padding: 0.75rem 1rem;
}

.plan-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.plan-icon {
  font-size: 1rem;
}

.plan-goal {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.plan-progress {
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.plan-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--agent-success), #3b82f6);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.plan-step {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   RICH CARDS
   ========================================================================== */
.agent-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.agent-card {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, rgba(59, 130, 246, 0.1) 100%);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: 0.75rem;
  padding: 1rem;
  transition: all 0.2s ease;
}

.agent-card:hover {
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.15);
}

.card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.card-icon {
  font-size: 1.5rem;
  line-height: 1;
}

.card-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.card-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: 0.75rem;
}

.card-button {
  width: 100%;
  padding: 0.5rem 1rem;
  background: linear-gradient(135deg, var(--candlelight) 0%, #f5c800 100%);
  border: none;
  border-radius: 0.5rem;
  color: var(--deep-space);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.card-button:hover {
  transform: scale(1.02);
  box-shadow: 0 2px 8px rgba(255, 215, 18, 0.3);
}

.card-button:active {
  transform: scale(0.98);
}

/* Single card - full width */
.agent-cards:has(.agent-card:only-child) {
  grid-template-columns: 1fr;
  max-width: 400px;
}

/* Mobile: stack cards */
@media (max-width: 480px) {
  .agent-cards {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   TOOL CALL BLOCK
   ========================================================================== */
.agent-tool {
  background: var(--agent-blue);
  border: 1px solid var(--agent-blue-border);
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
  overflow: hidden;
}

.tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  cursor: pointer;
}

.tool-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-icon {
  font-size: 1rem;
}

.tool-name {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.tool-status {
  font-size: 0.75rem;
  font-weight: 500;
}

.tool-status.success { color: var(--agent-success); }
.tool-status.error { color: var(--agent-error); }
.tool-status.pending { color: var(--text-tertiary); }

.tool-time {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.tool-toggle {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 0.25rem;
}

.tool-content {
  padding: 0 1rem 1rem;
  font-size: 0.875rem;
}

.agent-tool.collapsed .tool-content {
  display: none;
}

.tool-input,
.tool-output {
  background: rgba(0,0,0,0.2);
  padding: 0.75rem;
  border-radius: 0.5rem;
  margin-bottom: 0.5rem;
}

.tool-input strong,
.tool-output strong {
  display: block;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-bottom: 0.25rem;
}

/* ==========================================================================
   METRICS BAR
   ========================================================================== */
.agent-metrics {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.03);
  border-radius: 0.5rem;
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.metric {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.metric.confidence.high { color: var(--agent-success); }
.metric.confidence.medium { color: #f59e0b; }
.metric.confidence.low { color: var(--agent-error); }

/* ==========================================================================
   SOURCES
   ========================================================================== */
.agent-sources {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 0.75rem;
  margin-top: 0.75rem;
}

.sources-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  cursor: pointer;
}

.sources-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.sources-toggle {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
}

.sources-list {
  padding: 0 1rem 1rem;
}

.agent-sources.collapsed .sources-list {
  display: none;
}

.source-item {
  display: block;
  padding: 0.5rem 0;
  color: var(--text-secondary);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.source-item:last-child {
  border-bottom: none;
}

.source-item:hover {
  color: var(--candlelight);
}

.source-num {
  font-size: 0.75rem;
  color: var(--candlelight);
  margin-right: 0.5rem;
}

.source-title {
  font-size: 0.875rem;
}

.source-url {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  display: block;
  margin-top: 0.25rem;
}

/* ==========================================================================
   INPUT AREA - Pinned at bottom
   ========================================================================== */
.input-container {
  flex-shrink: 0;
  padding: 1rem;
  background: rgba(0,0,0,0.2);
  border-top: 1px solid rgba(255,255,255,0.08);
}

.input-wrapper {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
}

.message-input {
  flex: 1;
  padding: 0.875rem 1rem;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 1.5rem;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  line-height: 1.4;
  resize: none;
  min-height: 48px;
  max-height: 150px;
  transition: border-color 0.15s ease;
}

.message-input:focus {
  outline: none;
  border-color: var(--candlelight);
}

.message-input::placeholder {
  color: var(--text-tertiary);
}

.send-btn {
  width: 48px;
  height: 48px;
  background: var(--candlelight);
  color: var(--deep-space);
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(255, 215, 18, 0.4);
}

.send-btn:disabled {
  background: rgba(255,255,255,0.1);
  color: var(--text-tertiary);
  cursor: not-allowed;
}

/* Rate Limit */
.rate-limit {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-top: 0.75rem;
}

.rate-limit.warning {
  color: #f59e0b;
}

.rate-limit.error {
  color: var(--agent-error);
}

/* ==========================================================================
   FULLSCREEN MODE
   ========================================================================== */
.fullscreen-btn {
  display: none;
}

body.agent-fullscreen {
  overflow: hidden;
}

body.agent-fullscreen .header,
body.agent-fullscreen .footer {
  display: none !important;
}

body.agent-fullscreen .agent-page {
  padding-top: 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1000;
}

body.agent-fullscreen .agent-header {
  padding: 0.75rem 1rem;
  margin-bottom: 0;
  background: rgba(0,0,0,0.3);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

body.agent-fullscreen .agent-page > .container {
  padding: 0;
  max-width: 100%;
}

body.agent-fullscreen .agent-layout {
  gap: 0;
}

body.agent-fullscreen .agent-container {
  border-radius: 0;
  border: none;
}

/* Hide exit link in fullscreen, show as part of fullscreen button behavior */
body.agent-fullscreen .exit-btn {
  display: none;
}

/* On mobile fullscreen, make header more compact */
@media (max-width: 768px) {
  body.agent-fullscreen .agent-title {
    gap: 0.5rem;
  }

  body.agent-fullscreen .agent-icon {
    font-size: 1.25rem;
  }
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */

/* Tablet: Stack panel below chat */
@media (max-width: 1024px) {
  .agent-layout {
    flex-direction: column;
  }

  .agent-panel {
    width: 100%;
    max-height: 300px;
  }

  .agent-panel.visible {
    display: flex;
  }
}

@media (max-width: 768px) {
  /* Show fullscreen button on mobile */
  .fullscreen-btn {
    display: inline-flex;
  }

  .agent-page {
    height: 100vh;
    height: 100dvh;
    padding-top: 60px;
  }

  .agent-page > .container {
    padding: 0;
  }

  .agent-header {
    flex-direction: row;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    margin-bottom: 0;
  }

  .agent-title h1 {
    font-size: 1.125rem;
  }

  .agent-actions {
    gap: 0.25rem;
  }

  .btn-sm {
    padding: 0.375rem 0.5rem;
  }

  .btn-sm span {
    display: none;
  }

  .agent-layout {
    gap: 0;
  }

  .agent-container {
    border-radius: 0;
    border-left: none;
    border-right: none;
  }

  /* Panel as fullscreen modal */
  .agent-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    max-height: none;
    border-radius: 0;
    z-index: 200;
    background: var(--deep-space);
  }

  .messages-container {
    padding: 0.75rem;
  }

  .welcome-message {
    flex-direction: column;
    text-align: center;
    padding: 1rem;
  }

  .agent-avatar {
    margin: 0 auto;
  }

  .user-message,
  .agent-message {
    max-width: 95%;
  }

  .message-avatar {
    display: none;
  }

  .input-container {
    padding: 0.5rem 0.75rem;
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
  }

  .message-input {
    font-size: 16px;
    min-height: 44px;
    padding: 0.625rem 1rem;
  }

  .send-btn {
    width: 44px;
    height: 44px;
  }

  .rate-limit {
    margin-top: 0.5rem;
    font-size: 0.75rem;
  }

  /* Fullscreen mode adjustments for mobile */
  body.agent-fullscreen .agent-page {
    padding-top: 0;
  }

  body.agent-fullscreen .agent-header {
    padding: 0.5rem 1rem;
    padding-top: calc(0.5rem + env(safe-area-inset-top));
  }

  body.agent-fullscreen .input-container {
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
  }
}

@media (max-width: 480px) {
  .welcome-content h2 {
    font-size: 1.125rem;
  }

  .welcome-content p,
  .welcome-content li {
    font-size: 0.875rem;
  }

  .welcome-content h2 {
    font-size: 1.125rem;
  }

  .message-content {
    padding: 0.75rem 1rem;
  }
}