/* =============================================
   ASSI CHAT – Premium Dark Theme
   Accent: #e87040 (warm orange)
   ============================================= */

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

:root {
  --bg: #0a0a0a;
  --surface-1: #111111;
  --surface-2: #1a1a1a;
  --surface-3: #222222;
  --border: #2a2a2a;
  --border-subtle: #1e1e1e;
  --accent: #e87040;
  --accent-hover: #f08050;
  --accent-dim: rgba(232, 112, 64, 0.15);
  --accent-glow: rgba(232, 112, 64, 0.08);
  --text-primary: #f0f0f0;
  --text-secondary: #888;
  --text-muted: #555;
  --user-bubble: #1e1e1e;
  --sidebar-width: 260px;
  --topbar-h: 56px;
  --input-area-h: auto;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-xs: 6px;
  --font: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --transition: 0.2s ease;
}

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

/* =============================================
   SCROLLBARS
   ============================================= */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* =============================================
   LAYOUT
   ============================================= */
body {
  display: flex;
  height: 100dvh;
  overflow: hidden;
}

/* =============================================
   SIDEBAR
   ============================================= */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  height: 100dvh;
  background: var(--surface-1);
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition);
  z-index: 200;
  flex-shrink: 0;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 14px;
  border-bottom: 1px solid var(--border-subtle);
  gap: 8px;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow: hidden;
}

.sidebar-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
  flex-shrink: 0;
}

.sidebar-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.new-chat-btn {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-xs);
  background: var(--accent-dim);
  border: 1px solid rgba(232,112,64,0.2);
  color: var(--accent);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}

.new-chat-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: scale(1.05);
  box-shadow: 0 0 16px rgba(232,112,64,0.3);
}

.conversation-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.convo-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition);
  position: relative;
  group: true;
}

.convo-item:hover {
  background: var(--surface-2);
}

.convo-item.active {
  background: var(--accent-dim);
  border: 1px solid rgba(232,112,64,0.2);
}

.convo-item.active .convo-title {
  color: var(--accent);
}

.convo-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--surface-3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 13px;
}

.convo-item.active .convo-icon {
  background: rgba(232,112,64,0.2);
}

.convo-meta {
  flex: 1;
  min-width: 0;
}

.convo-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition);
}

.convo-item:hover .convo-title {
  color: var(--text-primary);
}

.convo-time {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 2px;
}

.convo-delete {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}

.convo-item:hover .convo-delete {
  display: flex;
}

.convo-delete:hover {
  background: rgba(239,68,68,0.2);
  color: #ef4444;
}

.sidebar-footer {
  padding: 12px 14px;
  border-top: 1px solid var(--border-subtle);
}

.sidebar-version {
  font-size: 11px;
  color: var(--text-muted);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 150;
  backdrop-filter: blur(2px);
}

/* =============================================
   MAIN
   ============================================= */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100dvh;
  overflow: hidden;
  min-width: 0;
}

/* =============================================
   TOPBAR
   ============================================= */
.topbar {
  height: var(--topbar-h);
  min-height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--surface-1);
  z-index: 10;
}

.menu-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.menu-btn:hover {
  background: var(--surface-2);
  color: var(--text-primary);
}

.topbar-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.current-model-badge {
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(232,112,64,0.2);
  padding: 3px 8px;
  border-radius: 20px;
  white-space: nowrap;
}

/* =============================================
   CHAT AREA
   ============================================= */
.chat-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  position: relative;
  scroll-behavior: smooth;
}

/* =============================================
   WELCOME SCREEN
   ============================================= */
.welcome-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  padding: 40px 20px;
}

.welcome-content {
  text-align: center;
  max-width: 520px;
  width: 100%;
  animation: fadeUp 0.5s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.welcome-avatar-wrap {
  position: relative;
  display: inline-block;
  margin-bottom: 24px;
}

.welcome-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  box-shadow: 0 0 0 8px var(--accent-glow), 0 0 40px rgba(232,112,64,0.2);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.welcome-heading {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.03em;
}

.welcome-sub {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.5;
}

.suggestion-chips {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  max-width: 440px;
  margin: 0 auto;
}

.chip {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 14px 16px;
  border-radius: 14px;
  font-size: 13px;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
  line-height: 1.4;
}

.chip:hover {
  background: var(--accent-dim);
  border-color: rgba(232,112,64,0.3);
  color: var(--accent);
  transform: translateY(-2px);
  transform: translateY(-1px);
}

/* =============================================
   MESSAGES
   ============================================= */
.messages {
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* --- Messages: clean ChatGPT-style layout --- */
.message-group {
  display: flex;
  gap: 14px;
  padding: 20px 24px;
  max-width: 760px;
  margin: 0 auto;
  transition: background 0.15s;
}

.message-group:hover {
  background: rgba(255,255,255,0.015);
}

.message-group.user {
  flex-direction: row-reverse;
}

/* Avatars */
.msg-avatar {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  flex-shrink: 0;
  margin-top: 2px;
  overflow: hidden;
}

.msg-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.msg-avatar.user-avatar {
  background: linear-gradient(135deg, var(--accent), #f09060);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: #fff;
  font-weight: 600;
  border: none;
}

/* Content */
.msg-content-wrap {
  flex: 1;
  min-width: 0;
  max-width: 85%;
}

.message-group.user .msg-content-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.msg-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}

.message-group.user .msg-header {
  flex-direction: row-reverse;
}

.msg-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
}

.msg-time {
  font-size: 11px;
  color: var(--text-muted);
}

/* Bubbles */
.msg-bubble {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  word-break: break-word;
  overflow-wrap: break-word;
}

/* User: subtle bubble */
.message-group.user .msg-bubble {
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 10px 16px;
  border-radius: 18px 18px 4px 18px;
  font-size: 14px;
  color: var(--text-primary);
}

/* Assistant: no bubble, just text */
.message-group.assistant .msg-bubble {
  background: none;
  border: none;
  padding: 0;
  border-radius: 0;
}

/* Message images */
.msg-images {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.msg-img {
  max-width: 240px;
  max-height: 200px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  border: 1px solid var(--border);
  cursor: zoom-in;
  transition: opacity var(--transition);
}

.msg-img:hover { opacity: 0.9; }

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 4px 0;
}

.typing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: typingBounce 1.2s infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.7); opacity: 0.5; }
  40% { transform: scale(1); opacity: 1; }
}

/* =============================================
   MARKDOWN CONTENT
   ============================================= */
.md-content h1, .md-content h2, .md-content h3,
.md-content h4, .md-content h5, .md-content h6 {
  margin: 16px 0 8px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

.md-content h1 { font-size: 1.5em; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
.md-content h2 { font-size: 1.25em; }
.md-content h3 { font-size: 1.1em; }

.md-content p { margin: 8px 0; }
.md-content p:first-child { margin-top: 0; }
.md-content p:last-child { margin-bottom: 0; }

.md-content ul, .md-content ol {
  padding-left: 20px;
  margin: 8px 0;
}

.md-content li { margin: 4px 0; }

.md-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(232,112,64,0.3);
  transition: border-color var(--transition);
}

.md-content a:hover {
  border-color: var(--accent);
}

.md-content blockquote {
  border-left: 3px solid var(--accent);
  padding: 6px 12px;
  margin: 10px 0;
  color: var(--text-secondary);
  background: var(--accent-glow);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.md-content table {
  border-collapse: collapse;
  width: 100%;
  margin: 10px 0;
  font-size: 13px;
}

.md-content th, .md-content td {
  border: 1px solid var(--border);
  padding: 7px 12px;
  text-align: left;
}

.md-content th {
  background: var(--surface-3);
  font-weight: 600;
}

.md-content tr:hover td { background: rgba(255,255,255,0.02); }

.md-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 16px 0;
}

/* Inline code */
.md-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface-3);
  padding: 1px 5px;
  border-radius: 4px;
  color: #e2b97a;
}

/* Code blocks */
.code-block-wrap {
  position: relative;
  margin: 12px 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border);
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #161b22;
  padding: 6px 14px;
  border-bottom: 1px solid #30363d;
}

.code-lang {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #8b949e;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.copy-btn {
  background: transparent;
  border: 1px solid #30363d;
  color: #8b949e;
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 5px;
}

.copy-btn:hover {
  background: #30363d;
  color: #e6edf3;
  border-color: #8b949e;
}

.copy-btn.copied {
  color: #3fb950;
  border-color: #3fb950;
}

.code-block-wrap pre {
  margin: 0;
  padding: 14px 16px;
  overflow-x: auto;
  background: #0d1117;
}

.code-block-wrap pre code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: transparent;
  padding: 0;
  color: inherit;
  border-radius: 0;
}

/* =============================================
   IMAGE PREVIEW STRIP
   ============================================= */
.image-preview-strip {
  padding: 10px 20px 4px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  background: var(--surface-1);
  border-top: 1px solid var(--border-subtle);
}

.img-preview-item {
  position: relative;
  width: 60px;
  height: 60px;
  border-radius: var(--radius-xs);
  overflow: hidden;
  border: 1px solid var(--border);
  animation: fadeUp 0.2s ease;
}

.img-preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-preview-remove {
  position: absolute;
  top: 2px;
  right: 2px;
  width: 18px;
  height: 18px;
  background: rgba(0,0,0,0.7);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 11px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* =============================================
   INPUT AREA
   ============================================= */
.input-area {
  background: var(--surface-1);
  border-top: 1px solid var(--border-subtle);
  padding: 8px 12px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  flex-shrink: 0;
}

.input-container {
  max-width: 760px;
  margin: 0 auto;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 22px;
  transition: border-color var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.input-container:focus-within {
  border-color: rgba(232,112,64,0.4);
  box-shadow: 0 0 0 3px rgba(232,112,64,0.06);
  background: var(--surface-2);
}

.input-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px 0;
  gap: 8px;
}

.input-toolbar-left, .input-toolbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: var(--radius-xs);
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.tool-btn:hover {
  background: var(--surface-3);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

.search-toggle.active {
  background: var(--accent-dim);
  border-color: rgba(232,112,64,0.4);
  color: var(--accent);
}

.search-label {
  font-size: 12px;
}

.model-select {
  background: var(--surface-3);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font);
  padding: 5px 8px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  outline: none;
  transition: all var(--transition);
  max-width: 160px;
}

.model-select:hover, .model-select:focus {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.model-select option, .model-select optgroup {
  background: var(--surface-2);
  color: var(--text-primary);
}

.input-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  padding: 8px 12px 10px;
  min-height: 52px;
}

#messageInput {
  flex: 1;
  min-width: 0;
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 16px;
  font-family: var(--font);
  resize: none;
  line-height: 1.6;
  min-height: 24px;
  max-height: 200px;
  overflow-y: auto;
  -webkit-appearance: none;
  appearance: none;
}

#messageInput::placeholder {
  color: var(--text-muted);
}

.send-btn {
  width: 38px;
  height: 38px;
  min-width: 38px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}

.send-btn:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: scale(1.05);
  box-shadow: 0 0 16px rgba(232,112,64,0.35);
}

.send-btn:disabled {
  background: var(--surface-3);
  color: var(--text-muted);
  cursor: not-allowed;
}

.input-hint {
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
}

/* =============================================
   EMPTY STATE / LOADING
   ============================================= */
.empty-convos {
  text-align: center;
  padding: 30px 16px;
  color: var(--text-muted);
  font-size: 13px;
}

.loading-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

/* =============================================
   TOAST
   ============================================= */
.toast-container {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  box-shadow: var(--shadow);
  animation: toastIn 0.3s ease both;
  pointer-events: all;
  white-space: nowrap;
}

.toast.error {
  border-color: rgba(239,68,68,0.4);
  color: #ef4444;
  background: rgba(239,68,68,0.05);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* =============================================
   MODAL (image zoom)
   ============================================= */
.img-modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.88);
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  cursor: zoom-out;
  backdrop-filter: blur(4px);
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.img-modal img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius);
  box-shadow: 0 20px 80px rgba(0,0,0,0.6);
  object-fit: contain;
}

/* =============================================
   MOBILE
   ============================================= */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100dvh;
    transform: translateX(-100%);
    box-shadow: var(--shadow);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
  }

  .menu-btn {
    display: flex;
  }

  .welcome-avatar {
    width: 90px;
    height: 90px;
  }

  .welcome-heading {
    font-size: 24px;
  }

  .chip {
    font-size: 12px;
    padding: 7px 12px;
  }

  .msg-content-wrap {
    max-width: 88%;
  }

  .model-select {
    max-width: 120px;
    font-size: 11px;
  }

  .search-label { display: none; }

  .current-model-badge { display: none; }
  
  .input-area {
    padding: 6px 8px;
    padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px));
  }

  .input-toolbar {
    padding: 4px 8px 0;
  }

  .input-row {
    padding: 6px 8px 8px;
  }
}

@media (max-width: 480px) {
  .message-group {
    padding: 12px 14px;
  }
  
  .msg-bubble {
    font-size: 14px;
  }

  .suggestion-chips {
    grid-template-columns: 1fr;
  }
  
  .input-toolbar {
    gap: 4px;
  }
}

/* =============================================
   DRAG & DROP OVERLAY
   ============================================= */
.drop-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 8000;
  background: rgba(232,112,64,0.08);
  border: 3px dashed var(--accent);
  border-radius: var(--radius);
  margin: 16px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  pointer-events: none;
}

.drop-overlay.active {
  display: flex;
}

.drop-overlay-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
}

/* =============================================
   SEARCH BADGE IN MESSAGE
   ============================================= */
.search-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(232,112,64,0.2);
  padding: 2px 8px;
  border-radius: 20px;
  margin-bottom: 8px;
}