:root {
  --bg: #1a0a12;
  --bg-panel: #2a1220;
  --bg-elevated: #3a1a2e;
  --border: #c9184a;
  --border-dim: #7a1035;
  --accent: #c9184a;
  --accent2: #ff8fab;
  --text: #ffe5ec;
  --text-dim: #c9a0ae;
  --text-muted: #8a6a7a;
  --success: #4ade80;
  --warning: #fbbf24;
  --danger: #f87171;
  --shadow: 4px 4px 0 #000;
  --shadow-sm: 2px 2px 0 #000;
  --radius: 8px;
  --radius-lg: 12px;
  --font-pixel: 'Press Start 2P', cursive;
  --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --sidebar-w: 280px;
  --topbar-h: 56px;
  --input-h: 56px;
}

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

html, body { height: 100%; overflow: hidden; }

body {
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  display: flex;
  min-height: 100vh;
}

.scanlines {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(0,0,0,0.12) 0px,
    rgba(0,0,0,0.12) 1px,
    transparent 1px,
    transparent 3px
  );
  opacity: 0.6;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-panel);
  border-right: 3px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 100;
  transform: translateX(0);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow);
}

.sidebar-header {
  padding: 16px;
  border-bottom: 2px solid var(--border-dim);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: var(--topbar-h);
}

.logo {
  font-family: var(--font-pixel);
  font-size: 0.7rem;
  color: var(--accent2);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.new-chat-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--accent);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.1s, box-shadow 0.1s;
  white-space: nowrap;
}

.new-chat-btn:hover { background: var(--accent2); color: var(--bg); }
.new-chat-btn:active { transform: translate(2px, 2px); box-shadow: none; }
.new-chat-btn svg { flex-shrink: 0; }

.sidebar-divider { height: 2px; background: var(--border-dim); }

.chat-history { flex: 1; overflow-y: auto; padding: 12px; }

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  text-align: center;
  gap: 8px;
  padding: 24px 12px;
}

.empty-state svg { opacity: 0.4; }
.empty-state p { font-family: var(--font-pixel); font-size: 0.55rem; text-transform: uppercase; letter-spacing: 1px; }
.empty-state span { font-size: 0.65rem; opacity: 0.6; }

.chat-list { list-style: none; display: flex; flex-direction: column; gap: 6px; }

.chat-item {
  padding: 10px 12px;
  background: var(--bg-elevated);
  border: 2px solid var(--border-dim);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  position: relative;
}

.chat-item:hover { border-color: var(--border); background: var(--bg-panel); }
.chat-item.active { border-color: var(--accent); background: var(--bg-panel); }

.chat-item-content { flex: 1; min-width: 0; }
.chat-item-title { font-size: 0.75rem; font-weight: 500; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 4px; }
.chat-item-preview { font-size: 0.65rem; color: var(--text-dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item-time { font-size: 0.55rem; color: var(--text-muted); font-family: var(--font-pixel); margin-top: 4px; }

.chat-item-actions { opacity: 0; transition: opacity 0.15s; display: flex; gap: 4px; }
.chat-item:hover .chat-item-actions { opacity: 1; }
.chat-item-action { padding: 4px; background: transparent; border: none; color: var(--text-dim); cursor: pointer; border-radius: 4px; display: flex; }
.chat-item-action:hover { color: var(--danger); background: rgba(248,113,113,0.1); }

.sidebar-footer { padding: 12px 16px; border-top: 2px solid var(--border-dim); }

.settings-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--bg-elevated);
  color: var(--text);
  border: 2px solid var(--border-dim);
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
}

.settings-btn:hover { border-color: var(--border); background: var(--bg-panel); }

/* Main */
.main {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  height: 100vh;
  min-width: 0;
}

.top-bar {
  height: var(--topbar-h);
  background: var(--bg-panel);
  border-bottom: 2px solid var(--border-dim);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.hamburger { display: none; padding: 8px; background: transparent; border: none; color: var(--text); cursor: pointer; border-radius: var(--radius); }
.hamburger:hover { background: var(--bg-elevated); }

.chat-title { flex: 1; display: flex; align-items: center; gap: 10px; min-width: 0; }
.chat-title h2 { font-size: 1rem; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.model-badge {
  font-family: var(--font-pixel);
  font-size: 0.5rem;
  padding: 2px 8px;
  background: var(--accent);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.top-actions { display: flex; gap: 8px; }
.icon-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  color: var(--text);
  border: 2px solid var(--border-dim);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, color 0.15s;
}
.icon-btn:hover { border-color: var(--border); background: var(--bg-panel); }
.icon-btn:active { transform: translate(1px, 1px); }

/* Chat Area */
.chat-area { flex: 1; overflow-y: auto; padding: 24px; display: flex; flex-direction: column; }

.welcome-screen { flex: 1; display: flex; align-items: center; justify-content: center; animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.welcome-card { text-align: center; max-width: 480px; padding: 32px; }
.welcome-icon { color: var(--accent); margin-bottom: 20px; opacity: 0.8; }
.welcome-card h3 { font-family: var(--font-pixel); font-size: 1.2rem; color: var(--accent2); letter-spacing: 1px; margin-bottom: 12px; text-transform: uppercase; }
.welcome-card > p { color: var(--text-dim); margin-bottom: 24px; font-size: 0.95rem; }

.welcome-examples { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; text-align: left; }
.example-btn {
  padding: 12px 14px;
  background: var(--bg-elevated);
  color: var(--text);
  border: 2px solid var(--border-dim);
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 0.7rem;
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
  white-space: normal;
  line-height: 1.4;
}
.example-btn:hover { border-color: var(--accent); background: var(--bg-panel); }

.messages { display: flex; flex-direction: column; gap: 16px; min-height: 200px; }

.message { display: flex; gap: 12px; animation: slideUp 0.25s ease; }
@keyframes slideUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }

.message-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-pixel);
  font-size: 0.65rem;
  border: 2px solid var(--border);
}

.message.user .message-avatar { background: var(--accent); color: var(--text); border-color: var(--accent); }
.message.assistant .message-avatar { background: var(--bg-elevated); color: var(--accent2); border-color: var(--border-dim); }

.message-content { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 8px; }

.message-text { font-size: 0.9rem; line-height: 1.6; color: var(--text); white-space: pre-wrap; word-wrap: break-word; }

.message-image { position: relative; border-radius: var(--radius-lg); overflow: hidden; border: 3px solid var(--border); box-shadow: var(--shadow); }
.message-image img { display: block; width: 100%; max-width: 512px; height: auto; }
.message-image-actions { position: absolute; top: 10px; right: 10px; display: flex; gap: 6px; opacity: 0; transition: opacity 0.15s; }
.message-image:hover .message-image-actions { opacity: 1; }
.image-action-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.7);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  backdrop-filter: blur(4px);
}
.image-action-btn:hover { background: var(--accent); border-color: var(--accent); }

.message-meta { display: flex; align-items: center; gap: 10px; font-size: 0.65rem; color: var(--text-muted); font-family: var(--font-pixel); text-transform: uppercase; letter-spacing: 0.5px; }
.message-meta .aspect-tag { padding: 2px 8px; background: var(--bg-elevated); border: 1px solid var(--border-dim); border-radius: 4px; }

.message-error { color: var(--danger); font-size: 0.8rem; padding: 10px 12px; background: rgba(248,113,113,0.1); border: 1px solid var(--danger); border-radius: var(--radius); }

/* Input Area */
.input-area { padding: 16px 24px; background: var(--bg-panel); border-top: 2px solid var(--border-dim); }

.input-wrapper { display: flex; gap: 10px; margin-bottom: 10px; }

.aspect-select {
  padding: 0 12px;
  height: var(--input-h);
  background: var(--bg-elevated);
  color: var(--text);
  border: 2px solid var(--border-dim);
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23c9a0ae' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  padding-right: 36px;
  min-width: 140px;
  flex-shrink: 0;
}
.aspect-select:focus { outline: none; border-color: var(--accent); }

.prompt-input {
  flex: 1;
  height: var(--input-h);
  max-height: 160px;
  padding: 12px 16px;
  background: var(--bg-elevated);
  color: var(--text);
  border: 2px solid var(--border-dim);
  border-radius: var(--radius);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  line-height: 1.5;
  resize: none;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.prompt-input::placeholder { color: var(--text-muted); }
.prompt-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(201,24,74,0.2); }

.input-actions { display: flex; justify-content: flex-end; gap: 10px; }

.enhanceBtn { padding: 0 16px; height: 40px; }
.enhanceBtn .icon-btn { height: 40px; width: 40px; }

.send-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--text);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform 0.1s, box-shadow 0.1s, background 0.15s;
  flex-shrink: 0;
}
.send-btn:hover:not(:disabled) { background: var(--accent2); color: var(--bg); }
.send-btn:active:not(:disabled) { transform: translate(2px, 2px); box-shadow: none; }
.send-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Generating Overlay */
.generating-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26,10,18,0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  backdrop-filter: blur(4px);
}
.generating-overlay.active { opacity: 1; visibility: visible; }

.generating-card { text-align: center; padding: 40px; background: var(--bg-panel); border: 3px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow); max-width: 320px; width: 90%; }

.generating-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-dim);
  border-top-color: var(--accent);
  border-radius: 50%;
  margin: 0 auto 20px;
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.generating-text { font-family: var(--font-pixel); font-size: 0.7rem; color: var(--accent2); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 16px; }

.generating-progress { height: 6px; background: var(--bg-elevated); border: 2px solid var(--border-dim); border-radius: 3px; overflow: hidden; }
.progress-bar { height: 100%; width: 0%; background: var(--accent); border-radius: 0; transition: width 0.3s ease; }

/* Modals */
.modal { border: none; background: transparent; padding: 0; max-width: 480px; width: 90%; }
.modal::backdrop { background: rgba(0,0,0,0.8); backdrop-filter: blur(4px); }

.modal-content {
  background: var(--bg-panel);
  border: 3px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.modal-backdrop { position: absolute; inset: 0; }

.modal-header { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; border-bottom: 2px solid var(--border-dim); }
.modal-header h3 { font-family: var(--font-pixel); font-size: 0.7rem; color: var(--accent2); text-transform: uppercase; letter-spacing: 1px; }
.modal-close { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; background: transparent; border: 2px solid var(--border-dim); border-radius: var(--radius); color: var(--text); cursor: pointer; }
.modal-close:hover { border-color: var(--danger); color: var(--danger); }

.modal-body { padding: 20px; }
.setting-group { margin-bottom: 24px; }
.setting-group h4 { font-family: var(--font-pixel); font-size: 0.55rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.setting-item { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.setting-item span { font-size: 0.85rem; color: var(--text); }
.setting-select { padding: 8px 12px; background: var(--bg-elevated); color: var(--text); border: 2px solid var(--border-dim); border-radius: var(--radius); font-family: var(--font-ui); font-size: 0.8rem; cursor: pointer; }
.setting-item input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--accent); cursor: pointer; }

.danger-btn { width: 100%; padding: 10px 16px; background: transparent; color: var(--danger); border: 2px solid var(--danger); border-radius: var(--radius); font-family: var(--font-ui); font-size: 0.8rem; font-weight: 600; cursor: pointer; }
.danger-btn:hover { background: var(--danger); color: var(--bg); }
.setting-note { font-size: 0.7rem; color: var(--text-muted); margin-top: 8px; }
.version { font-family: var(--font-pixel); font-size: 0.55rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }

.confirm-modal .modal-body { text-align: center; }
.confirm-modal .modal-body p { font-size: 0.9rem; color: var(--text); margin-bottom: 8px; }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; padding: 16px 20px; border-top: 2px solid var(--border-dim); }

.btn { padding: 10px 20px; border-radius: var(--radius); font-family: var(--font-ui); font-size: 0.8rem; font-weight: 600; cursor: pointer; border: 2px solid; transition: background 0.15s, color 0.15s; }
.btn-secondary { background: var(--bg-elevated); color: var(--text); border-color: var(--border-dim); }
.btn-secondary:hover { border-color: var(--border); background: var(--bg-panel); }
.btn-danger { background: var(--danger); color: var(--bg); border-color: var(--danger); }
.btn-danger:hover { opacity: 0.9; }

/* Toasts */
.toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 300; display: flex; flex-direction: column; gap: 10px; pointer-events: none; }
.toast { pointer-events: auto; padding: 12px 16px; background: var(--bg-panel); border: 3px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); display: flex; align-items: center; gap: 10px; min-width: 280px; max-width: 400px; animation: slideInRight 0.3s ease; }
@keyframes slideInRight { from { opacity: 0; transform: translateX(100%); } to { opacity: 1; transform: none; } }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.warning { border-color: var(--warning); }
.toast-icon { flex-shrink: 0; }
.toast-message { flex: 1; font-size: 0.8rem; color: var(--text); }
.toast-action { padding: 4px 10px; background: var(--accent); color: var(--text); border: 1px solid var(--border); border-radius: 4px; font-size: 0.65rem; font-family: var(--font-pixel); text-transform: uppercase; cursor: pointer; }
.toast-action:hover { background: var(--accent2); color: var(--bg); }
.toast-close { flex-shrink: 0; padding: 4px; color: var(--text-dim); cursor: pointer; }
.toast-close:hover { color: var(--text); }

/* Image Modal (Fullscreen) */
.image-modal { position: fixed; inset: 0; z-index: 400; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,0.95); opacity: 0; visibility: hidden; transition: opacity 0.2s, visibility 0.2s; }
.image-modal.active { opacity: 1; visibility: visible; }
.image-modal img { max-width: 90vw; max-height: 90vh; object-fit: contain; }
.image-modal-close { position: absolute; top: 24px; right: 24px; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--bg-panel); border: 2px solid var(--border-dim); border-radius: 50%; color: var(--text); cursor: pointer; font-size: 24px; z-index: 10; }
.image-modal-close:hover { border-color: var(--danger); color: var(--danger); }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-dim); border-radius: 4px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--border); }

/* Mobile */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); width: 300px; border-radius: 0 0 var(--radius-lg) 0; }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 99; opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s; }
  .sidebar-backdrop.active { opacity: 1; visibility: visible; }

  .main { margin-left: 0; }
  .hamburger { display: flex; }
  .top-bar { padding: 0 12px; }
  .chat-area { padding: 16px; }
  .input-area { padding: 12px 16px; }
  .welcome-examples { grid-template-columns: 1fr; }
  .message-image img { max-width: 100%; }
  .input-wrapper { flex-direction: column; }
  .aspect-select { width: 100%; min-width: 0; }
  .toast-container { left: 12px; right: 12px; bottom: 12px; }
  .toast { min-width: 0; max-width: none; }
  .chat-title h2 { font-size: 0.9rem; }
}

@media (max-width: 480px) {
  .chat-area { padding: 12px; }
  .input-area { padding: 10px 12px; }
  .prompt-input { font-size: 0.85rem; }
  .welcome-card { padding: 20px; }
  .welcome-card h3 { font-size: 1rem; }
  .example-btn { font-size: 0.65rem; padding: 10px 12px; }
  .modal { width: 95%; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}