/* ================================================================
   Atomontage Chat UI - Design tokens from atomontage.com
   ================================================================ */

:root {
  /* Colors */
  --bg-primary: #121213;
  --bg-secondary: #1a1a1c;
  --bg-tertiary: #202022;
  --bg-elevated: #262628;
  --bg-hover: #2e2e31;
  --bg-input: #202022;

  --accent: #42a2fd;
  --accent-hover: #5bb3ff;
  --accent-dim: rgba(66, 162, 253, 0.15);
  --accent-border: rgba(66, 162, 253, 0.3);

  --text-primary: #fefefe;
  --text-secondary: #9c9c9e;
  --text-tertiary: #737378;
  --text-dim: #555558;

  --border: #2e2e31;
  --border-light: #3a3a3d;

  --danger: #ef4444;
  --danger-hover: #f87171;
  --warning: #f59e0b;
  --success: #22c55e;

  /* Typography */
  --font-body: 'Montserrat', system-ui, -apple-system, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  --text-xs: 0.6875rem;
  --text-sm: 0.8125rem;
  --text-base: 0.875rem;
  --text-lg: 1rem;
  --text-xl: 1.125rem;

  /* Spacing */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;

  /* Layout */
  --header-height: 48px;
  --chat-width: 420px;
  --chat-min-width: 300px;
  --chat-max-width: 700px;
  --resize-handle-width: 5px;

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

/* ================================================================
   Reset & base
   ================================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ================================================================
   Header
   ================================================================ */

#app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--sp-4);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.logo {
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.15em;
  color: var(--text-primary);
}

.montage-name {
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

.header-center {
  display: flex;
  align-items: center;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
}

/* Connection status */
.connection-status {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-dim);
}

.connection-status.connected .status-dot { background: var(--success); }
.connection-status.reconnecting .status-dot {
  background: var(--warning);
  animation: pulse 1.5s infinite;
}
.connection-status.disconnected .status-dot { background: var(--danger); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* Credits display */
.credits-display {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  padding: var(--sp-1) var(--sp-3);
  background: var(--bg-tertiary);
  border-radius: var(--radius-full);
}

.credits-icon {
  color: var(--accent);
  font-size: var(--text-sm);
}

.credits-label {
  color: var(--text-tertiary);
}

/* Connected makers */
.connected-makers {
  display: flex;
  align-items: center;
  gap: -4px;
}

.maker-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 2px solid var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--accent);
  margin-left: -4px;
  cursor: default;
  position: relative;
}

.maker-avatar:first-child { margin-left: 0; }

.maker-avatar[title]:hover::after {
  content: attr(title);
  position: absolute;
  top: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elevated);
  color: var(--text-primary);
  padding: var(--sp-1) var(--sp-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  white-space: nowrap;
  z-index: 200;
  border: 1px solid var(--border);
}

/* ================================================================
   Buttons
   ================================================================ */

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: var(--sp-2) var(--sp-3);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-danger:hover {
  background: var(--danger);
  color: #fff;
}

.btn-danger:disabled, .btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-sm {
  padding: var(--sp-1) var(--sp-3);
  font-size: var(--text-xs);
}

.btn-icon {
  background: none;
  border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--sp-1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

/* ================================================================
   Main layout
   ================================================================ */

#app-main {
  display: flex;
  height: calc(100vh - var(--header-height));
  overflow: hidden;
}

/* ================================================================
   Chat panel
   ================================================================ */

.chat-panel {
  width: var(--chat-width);
  min-width: var(--chat-min-width);
  max-width: var(--chat-max-width);
  display: flex;
  flex-direction: column;
  background: var(--bg-primary);
  border-right: 1px solid var(--border);
  transition: width var(--transition-base);
  overflow: hidden;
}

.chat-panel.collapsed {
  width: 0;
  min-width: 0;
  border-right: none;
}

.chat-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-2) var(--sp-4);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.chat-title {
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ================================================================
   Queue status
   ================================================================ */

.queue-status {
  padding: var(--sp-2) var(--sp-4);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  font-size: var(--text-xs);
  color: var(--text-secondary);
  flex-shrink: 0;
}

.queue-executing {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin-bottom: var(--sp-1);
}

.queue-executing .spinner {
  width: 10px;
  height: 10px;
  border: 2px solid var(--accent-dim);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.queue-depth {
  color: var(--text-tertiary);
}

.queue-position {
  color: var(--accent);
  font-weight: 500;
}

.queue-paused {
  color: var(--warning);
  font-weight: 500;
  padding: var(--sp-1) 0;
}

/* ================================================================
   Owner controls
   ================================================================ */

.owner-controls {
  padding: var(--sp-3) var(--sp-4);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.owner-controls-header {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--sp-2);
}

.owner-controls-row {
  display: flex;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}

.queued-prompts-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  max-height: 120px;
  overflow-y: auto;
}

.queued-prompt-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-1) var(--sp-2);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.queued-prompt-item .prompt-preview {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: var(--sp-2);
}

.queued-prompt-delete {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  padding: 2px 4px;
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.queued-prompt-delete:hover {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
}

/* ================================================================
   Messages
   ================================================================ */

.messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  scroll-behavior: smooth;
}

.messages::-webkit-scrollbar { width: 4px; }
.messages::-webkit-scrollbar-track { background: transparent; }
.messages::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}
.messages::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* User message */
.message {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  max-width: 100%;
}

.message-user {
  align-items: flex-end;
}

.message-user .message-bubble {
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-md) var(--radius-md) var(--radius-sm) var(--radius-md);
  padding: var(--sp-2) var(--sp-3);
  max-width: 85%;
  word-wrap: break-word;
  white-space: pre-wrap;
}

/* Assistant message */
.message-assistant {
  align-items: flex-start;
}

.message-assistant .message-bubble {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border-radius: var(--radius-md) var(--radius-md) var(--radius-md) var(--radius-sm);
  padding: var(--sp-3);
  max-width: 95%;
  word-wrap: break-word;
  white-space: pre-wrap;
  border: 1px solid var(--border);
}

.message-meta {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-xs);
  color: var(--text-dim);
  padding: 0 var(--sp-1);
}

.message-cost {
  display: none;
  color: var(--text-tertiary);
}

.message:hover .message-cost {
  display: inline;
}

/* Undo button */
.undo-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 2px var(--sp-2);
  font-size: var(--text-xs);
  font-family: var(--font-body);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.undo-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
  background: var(--bg-hover);
}

/* Status messages */
.message-status {
  align-items: center;
}

.message-status .message-bubble {
  background: transparent;
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  padding: var(--sp-1) var(--sp-2);
  border: 1px dashed var(--border);
  border-radius: var(--radius-full);
}

.message-status .message-bubble.error {
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.3);
}

/* Streaming indicator */
.streaming-cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 0.8s step-end infinite;
}

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

/* Tool use indicator */
.tool-use-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: 2px var(--sp-2);
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  margin: var(--sp-1) 0;
}

/* ================================================================
   Code blocks (collapsible)
   ================================================================ */

.code-block-wrapper {
  margin: var(--sp-2) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-2) var(--sp-3);
  background: var(--bg-tertiary);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.code-block-header:hover {
  background: var(--bg-hover);
}

.code-block-header .toggle-icon {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  transition: transform var(--transition-base);
}

.code-block-header .toggle-icon.expanded {
  transform: rotate(90deg);
}

.code-block-header .file-name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-secondary);
}

.code-block-content {
  display: none;
  background: var(--bg-primary);
  overflow-x: auto;
}

.code-block-content.expanded {
  display: block;
}

.code-block-content pre {
  margin: 0;
  padding: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre;
}

/* ================================================================
   Chat input
   ================================================================ */

.chat-input-area {
  padding: var(--sp-3) var(--sp-4);
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
  flex-shrink: 0;
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast);
  padding: var(--sp-2);
  gap: var(--sp-2);
}

.input-wrapper:focus-within {
  border-color: var(--accent-border);
}

.prompt-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--text-base);
  resize: none;
  padding: var(--sp-1) var(--sp-2);
  max-height: 120px;
  line-height: 1.5;
}

.prompt-input::placeholder {
  color: var(--text-dim);
}

.send-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.send-btn:hover { background: var(--accent-hover); }
.send-btn:disabled {
  background: var(--bg-elevated);
  color: var(--text-dim);
  cursor: not-allowed;
}

.input-hint {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding-top: var(--sp-1);
  font-size: var(--text-xs);
  color: var(--text-dim);
}

.input-hint .separator { color: var(--border); }

/* ================================================================
   Resize handle
   ================================================================ */

.resize-handle {
  width: var(--resize-handle-width);
  cursor: col-resize;
  background: transparent;
  position: relative;
  flex-shrink: 0;
  z-index: 50;
  transition: background var(--transition-fast);
}

.resize-handle:hover,
.resize-handle.active {
  background: var(--accent);
}

/* ================================================================
   Expand chat button
   ================================================================ */

.expand-chat-btn {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 50;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-left: none;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: var(--sp-3) var(--sp-1);
  display: flex;
  align-items: center;
  transition: all var(--transition-fast);
}

.expand-chat-btn:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}

/* ================================================================
   WASM panel
   ================================================================ */

.wasm-panel {
  flex: 1;
  background: #0a0a0b;
  position: relative;
  overflow: hidden;
}

/* WASM client iframe - fills the entire right panel */
.wasm-iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  display: none;
  z-index: 1;
}

/* ================================================================
   WASM overlays (loading, error, placeholder)
   ================================================================ */

.wasm-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0a0a0b;
  z-index: 10;
  transition: opacity var(--transition-base);
}

.wasm-overlay-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-3);
  text-align: center;
  padding: var(--sp-4);
}

/* --- Loading state --- */

.wasm-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--bg-elevated);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

.wasm-loading-text {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.wasm-loading-sub {
  font-size: var(--text-xs);
  color: var(--text-dim);
}

/* --- Error state --- */

.wasm-error-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(239, 68, 68, 0.12);
  color: var(--danger);
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.wasm-error-text {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--text-primary);
}

.wasm-error-detail {
  font-size: var(--text-xs);
  color: var(--text-dim);
  max-width: 320px;
  word-break: break-word;
}

#wasm-retry-btn {
  margin-top: var(--sp-2);
}

/* --- Placeholder state (no VM connection info) --- */

.wasm-placeholder-overlay .wasm-logo {
  font-weight: 700;
  font-size: 2rem;
  letter-spacing: 0.2em;
  color: var(--text-tertiary);
  opacity: 0.4;
}

.wasm-placeholder-overlay .wasm-subtitle {
  font-size: var(--text-sm);
  color: var(--text-dim);
  letter-spacing: 0.1em;
}

.wasm-placeholder-overlay .wasm-hint {
  font-size: var(--text-xs);
  color: var(--text-dim);
  opacity: 0.5;
  margin-top: var(--sp-4);
}

/* ================================================================
   Kill dialog
   ================================================================ */

.kill-dialog {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 0;
  max-width: 380px;
  width: 90%;
}

.kill-dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
}

.dialog-content {
  padding: var(--sp-6);
}

.dialog-content h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--sp-2);
}

.dialog-content p {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--sp-4);
}

.dialog-option {
  margin-bottom: var(--sp-4);
}

.dialog-option label {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
}

.dialog-option input[type="checkbox"] {
  accent-color: var(--accent);
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--sp-2);
}

/* ================================================================
   Scrollbar for queued prompts list
   ================================================================ */

.queued-prompts-list::-webkit-scrollbar { width: 3px; }
.queued-prompts-list::-webkit-scrollbar-track { background: transparent; }
.queued-prompts-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}