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

:root {
  --bg: #0f0f13;
  --surface: #1a1a22;
  --surface2: #242430;
  --border: #2e2e3a;
  --text: #e8e8ef;
  --text-dim: #8888a0;
  --accent: #7c5cfc;
  --accent-hover: #9478ff;
  --accent-glow: rgba(124, 92, 252, 0.3);
  --danger: #f04060;
  --radius: 10px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 1.5rem 1rem 0.5rem;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  position: relative;
}

/* Settings gear icon */
.settings-btn {
  position: absolute;
  right: 0;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.settings-btn:hover {
  background: var(--surface2);
  color: var(--text);
  transform: rotate(30deg);
}

/* Setup overlay */
.setup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.setup-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  max-width: 440px;
  width: 100%;
  text-align: center;
}

.setup-card h2 {
  font-size: 1.4rem;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #7c5cfc, #ff6baa, #ffb86b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.setup-card p {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.setup-hint {
  margin-bottom: 1.25rem !important;
}

.setup-hint a {
  color: var(--accent);
  text-decoration: none;
}

.setup-hint a:hover {
  text-decoration: underline;
}

.api-key-input {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface2);
  color: var(--text);
  font-size: 0.95rem;
  font-family: monospace;
  outline: none;
  margin-bottom: 1rem;
  transition: border-color 0.15s;
}

.api-key-input:focus {
  border-color: var(--accent);
}

.setup-error {
  color: var(--danger) !important;
  font-size: 0.85rem !important;
  margin-top: 0.5rem !important;
  min-height: 1.2em;
}

.backend-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  color: var(--text-dim);
  font-size: 0.8rem;
  cursor: pointer;
  user-select: none;
}

.backend-toggle input {
  margin: 0;
}

h1 {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, #7c5cfc, #ff6baa, #ffb86b);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

main {
  flex: 1;
  padding: 1rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.canvas-panel, .result-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.tool-group {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.tool-group.actions { margin-left: auto; }

.tool-btn {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-dim);
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

.tool-btn:hover { background: var(--surface2); color: var(--text); }
.tool-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.size-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-dim);
  font-size: 0.8rem;
}

#brush-size {
  width: 80px;
  accent-color: var(--accent);
}

#size-display {
  min-width: 1.5em;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Color bar */
.color-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface2);
}

.color-swatches {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.swatch {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.1s, border-color 0.15s;
}

.swatch:hover { transform: scale(1.15); }
.swatch.active { border-color: #fff; transform: scale(1.15); }

#custom-color {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  background: none;
  padding: 0;
}

#custom-color::-webkit-color-swatch-wrapper { padding: 0; }
#custom-color::-webkit-color-swatch { border: 2px solid var(--border); border-radius: 6px; }

.pattern-picker {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
  padding-left: 8px;
  border-left: 1px solid var(--border);
}

.pattern-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.pattern-btn {
  padding: 2px 8px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.7rem;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.pattern-btn:hover { border-color: var(--accent); color: var(--text); }
.pattern-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Canvas */
.canvas-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  min-height: 400px;
  background: #fff;
  cursor: crosshair;
}

#drawing-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Result panel */
.result-panel {
  position: relative;
  min-height: 400px;
}

.result-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--text-dim);
  padding: 2rem;
  text-align: center;
}

.result-placeholder svg { opacity: 0.3; }

.morph-container {
  position: relative;
  flex: 1;
  overflow: hidden;
  background: #111;
}

#result-image, #result-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

#sketch-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  opacity: 1;
  transition: opacity 3s ease-in-out;
}

#sketch-overlay.dissolving {
  opacity: 0 !important;
}

/* Video status bar */
.video-status {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--surface2);
  color: var(--text-dim);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

.video-status.done {
  color: #44cc88;
}

.video-status.error {
  color: var(--danger);
}

.video-status.done .spinner,
.video-status.error .spinner {
  display: none;
}

.result-actions {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-top: 1px solid var(--border);
}

.action-btn {
  flex: 1;
  padding: 0.5rem;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.action-btn:hover { background: var(--accent-hover); }
.action-btn.secondary { background: transparent; color: var(--accent); }
.action-btn.secondary:hover { background: var(--accent); color: #fff; }

/* Generate section */
.generate-section {
  margin-bottom: 1rem;
}

.prompt-row {
  display: flex;
  gap: 0.75rem;
}

#style-prompt {
  flex: 1;
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}

#style-prompt::placeholder { color: var(--text-dim); }
#style-prompt:focus { border-color: var(--accent); }

.generate-btn {
  padding: 0.75rem 2rem;
  border-radius: var(--radius);
  border: none;
  background: linear-gradient(135deg, #7c5cfc, #a855f7);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  white-space: nowrap;
}

.generate-btn:hover { opacity: 0.9; transform: translateY(-1px); }
.generate-btn:active { transform: translateY(0); }
.generate-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  vertical-align: middle;
  margin-right: 0.4rem;
}

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

.mode-toggle {
  display: flex;
  justify-content: center;
  margin-top: 0.5rem;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.toggle-label input { display: none; }

.toggle-slider {
  width: 36px;
  height: 20px;
  background: var(--accent);
  border-radius: 10px;
  position: relative;
  transition: background 0.2s;
}

.toggle-slider::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  top: 2px;
  left: 2px;
  transition: transform 0.2s;
}

.toggle-label input:checked + .toggle-slider {
  background: var(--text-dim);
}

.toggle-label input:checked + .toggle-slider::after {
  transform: translateX(16px);
}

.toggle-text {
  user-select: none;
}

.suggestions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.5rem;
  flex-wrap: wrap;
}

.suggestions-label {
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.suggestion {
  padding: 0.3rem 0.7rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.suggestion:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.suggestion.wiggle {
  animation: wiggle 0.4s ease;
  border-color: var(--accent);
  color: var(--text);
}

@keyframes wiggle {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-3px); }
  75% { transform: translateX(3px); }
}

#style-prompt.pulse {
  border-color: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.status {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-dim);
  min-height: 1.2em;
}

.status.error { color: var(--danger); }

/* Footer */
footer {
  text-align: center;
  padding: 1rem;
  color: var(--text-dim);
  font-size: 0.8rem;
}

footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* Chat panel */
.chat-panel {
  display: flex;
  flex-direction: column;
}

.chat-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: var(--text-dim);
  padding: 2rem;
  text-align: center;
}

.chat-placeholder svg { opacity: 0.3; }
.chat-placeholder strong { color: var(--accent); }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 0;
}

.chat-bubble {
  max-width: 85%;
  padding: 0.75rem 1rem;
  border-radius: 16px;
  font-size: 0.95rem;
  line-height: 1.5;
  word-wrap: break-word;
  animation: bubblePop 0.25s ease-out;
}

@keyframes bubblePop {
  from { opacity: 0; transform: translateY(8px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.chat-ai {
  align-self: flex-start;
  background: linear-gradient(135deg, #6b3fa0, #8b5cf6);
  color: #fff;
  border-bottom-left-radius: 4px;
}

.chat-user {
  align-self: flex-end;
  background: linear-gradient(135deg, #2563eb, #38bdf8);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-system {
  align-self: center;
  background: transparent;
  color: var(--text-dim);
  font-size: 0.75rem;
  font-family: monospace;
  padding: 0.25rem 0.5rem;
  font-style: italic;
  max-width: 100%;
  opacity: 0.7;
}

.chat-input-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}

.chat-input-row input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
}

.chat-input-row input:focus {
  border-color: var(--accent);
}

.chat-send-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.15s;
}

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

.chat-image {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 0.25rem;
}

.chat-video {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 0.25rem;
}

.chat-caption {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* Typing dots */
.chat-dots span {
  animation: dotBounce 1.2s infinite;
  display: inline-block;
  font-size: 1.4rem;
  font-weight: bold;
}
.chat-dots span:nth-child(2) { animation-delay: 0.2s; }
.chat-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotBounce {
  0%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-6px); }
}

/* Response buttons area */
.chat-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.75rem;
  border-top: 1px solid var(--border);
  background: var(--surface2);
}

.chat-response-btn {
  flex: 1;
  min-width: 100px;
  min-height: 52px;
  padding: 0.6rem 1rem;
  border-radius: 14px;
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
}

.chat-response-btn:hover { transform: scale(1.03); }
.chat-response-btn:active { transform: scale(0.97); }

.btn-green { border-color: #22c55e; background: rgba(34, 197, 94, 0.15); color: #4ade80; }
.btn-green:hover { background: #22c55e; color: #fff; }
.btn-orange { border-color: #f59e0b; background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.btn-orange:hover { background: #f59e0b; color: #fff; }
.btn-blue { border-color: #3b82f6; background: rgba(59, 130, 246, 0.15); color: #60a5fa; }
.btn-blue:hover { background: #3b82f6; color: #fff; }

/* Emoji grid */
.emoji-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.4rem;
  width: 100%;
}

.emoji-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 0.5rem 0.25rem;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  min-height: 56px;
}

.emoji-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: scale(1.05);
}

.emoji-btn:active { transform: scale(0.95); }

.emoji-icon { font-size: 1.5rem; line-height: 1; }
.emoji-label { font-size: 0.65rem; opacity: 0.8; }

/* Text input in chat */
.chat-input-row {
  display: flex;
  gap: 0.5rem;
  width: 100%;
}

.chat-text-input {
  flex: 1;
  padding: 0.6rem 0.75rem;
  border-radius: 12px;
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  outline: none;
}

.chat-text-input:focus { border-color: var(--accent); }

.chat-send-btn {
  padding: 0.6rem 1.2rem;
  border-radius: 12px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}

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

/* Prevent canvas from triggering browser scroll/zoom on touch */
#drawing-canvas {
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

/* Responsive */
@media (max-width: 768px) {
  body { padding: 0; }
  header { padding: 0.75rem 0.5rem 0.25rem; }
  h1 { font-size: 1.4rem; }
  .tagline { font-size: 0.8rem; }
  main { padding: 0.5rem; }

  .workspace {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  .canvas-container { min-height: 280px; }
  .result-panel { min-height: 280px; }

  /* Bigger touch targets */
  .tool-btn, .settings-btn { width: 44px; height: 44px; }
  .swatch { width: 44px; height: 44px; }
  .suggestion { padding: 0.5rem 0.9rem; font-size: 0.9rem; }
  .pattern-btn { padding: 0.4rem 0.8rem; font-size: 0.85rem; min-height: 36px; }
  #brush-size { width: 100px; height: 24px; }

  .prompt-row { flex-direction: column; gap: 0.4rem; }
  #style-prompt { font-size: 1rem; padding: 0.8rem; }
  .generate-btn { padding: 0.9rem 1.2rem; font-size: 1.1rem; width: 100%; }

  .emoji-grid { grid-template-columns: repeat(4, 1fr); }
  .emoji-btn { min-height: 64px; font-size: 2rem; }

  .chat-response-btn { min-height: 56px; font-size: 1.05rem; padding: 0.8rem 1rem; }

  .chat-input-row input { font-size: 1rem; min-height: 44px; }
  .chat-send-btn { min-width: 44px; min-height: 44px; }
}

@media (max-width: 480px) {
  .color-swatches { gap: 6px; }
  .swatch { width: 28px; height: 28px; }
  .toolbar { padding: 0.4rem 0.5rem; gap: 0.4rem; }
}