/* =====================================================
   SmartAI – Floating AI Assistant Widget Styles
   Design: Modern, premium, dark-mode ready
   ===================================================== */

/* ── CSS Variables ── */
:root {
  --smartai-primary: #2563eb;
  --smartai-primary-light: #3b82f6;
  --smartai-primary-dark: #1d4ed8;
  --smartai-gradient: linear-gradient(135deg, #2563eb, #7c3aed);
  --smartai-shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --smartai-shadow-md: 0 8px 32px rgba(0,0,0,0.12);
  --smartai-shadow-lg: 0 16px 48px rgba(0,0,0,0.18);
  --smartai-radius-sm: 8px;
  --smartai-radius: 12px;
  --smartai-radius-lg: 16px;
  --smartai-radius-xl: 20px;
  --smartai-radius-full: 50%;
  --smartai-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --smartai-bg: #ffffff;
  --smartai-surface: #f8fafc;
  --smartai-surface-hover: #f1f5f9;
  --smartai-border: #e2e8f0;
  --smartai-text: #0f172a;
  --smartai-text-secondary: #64748b;
  --smartai-text-muted: #94a3b8;
  --smartai-user-bubble: #2563eb;
  --smartai-user-text: #ffffff;
  --smartai-bot-bubble: #f1f5f9;
  --smartai-bot-text: #0f172a;
  --smartai-code-bg: #1e293b;
  --smartai-code-text: #e2e8f0;
  --smartai-scrollbar-thumb: #cbd5e1;
  --smartai-scrollbar-track: transparent;
  --smartai-header-bg: linear-gradient(135deg, #2563eb, #7c3aed);
  --smartai-input-bg: #f8fafc;
  --smartai-input-border: #e2e8f0;
  --smartai-input-focus: #2563eb;
}

/* ── Dark Mode ── */
[data-theme="dark"] {
  --smartai-bg: #1e293b;
  --smartai-surface: #0f172a;
  --smartai-surface-hover: #334155;
  --smartai-border: #334155;
  --smartai-text: #f1f5f9;
  --smartai-text-secondary: #94a3b8;
  --smartai-text-muted: #64748b;
  --smartai-user-bubble: #3b82f6;
  --smartai-user-text: #ffffff;
  --smartai-bot-bubble: #334155;
  --smartai-bot-text: #e2e8f0;
  --smartai-code-bg: #0f172a;
  --smartai-code-text: #e2e8f0;
  --smartai-scrollbar-thumb: #475569;
  --smartai-header-bg: linear-gradient(135deg, #1d4ed8, #6d28d9);
  --smartai-input-bg: #0f172a;
  --smartai-input-border: #334155;
  --smartai-input-focus: #3b82f6;
}

/* ── Floating Button ── */
#smartai-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99999;
  width: 60px;
  height: 60px;
  border-radius: var(--smartai-radius-full);
  background: var(--smartai-gradient);
  border: none;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--smartai-transition);
  color: #fff;
  font-size: 26px;
  animation: smartai-fab-enter 0.5s ease-out;
}

#smartai-fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 28px rgba(37, 99, 235, 0.5);
}

#smartai-fab:active {
  transform: scale(0.95);
}

#smartai-fab .smartai-fab-icon {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#smartai-fab.smartai-open .smartai-fab-icon {
  transform: rotate(45deg);
}

@keyframes smartai-fab-enter {
  from {
    opacity: 0;
    transform: scale(0) translateY(20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ── Pulse Ring ── */
#smartai-fab::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: var(--smartai-radius-full);
  background: var(--smartai-gradient);
  opacity: 0.3;
  z-index: -1;
  animation: smartai-pulse 2s ease-in-out infinite;
}

@keyframes smartai-pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.15); opacity: 0.1; }
}

/* ── Chat Widget Container ── */
#smartai-widget {
  position: fixed;
  bottom: 96px;
  right: 24px;
  z-index: 99998;
  width: 380px;
  max-width: calc(100vw - 48px);
  height: 600px;
  max-height: calc(100vh - 120px);
  background: var(--smartai-bg);
  border-radius: var(--smartai-radius-lg);
  box-shadow: var(--smartai-shadow-lg);
  border: 1px solid var(--smartai-border);
  display: none;
  flex-direction: column;
  overflow: hidden;
  animation: smartai-slide-up 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: bottom right;
}

#smartai-widget.smartai-visible {
  display: flex;
}

@keyframes smartai-slide-up {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ── Header ── */
.smartai-header {
  background: var(--smartai-header-bg);
  padding: 16px 20px;
  color: #fff;
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.smartai-header::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,0.05);
  border-radius: var(--smartai-radius-full);
  pointer-events: none;
}

.smartai-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1;
}

.smartai-header-info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.smartai-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--smartai-radius-sm);
  background: rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  backdrop-filter: blur(4px);
}

.smartai-header-text {
  min-width: 0;
}

.smartai-header-text h5 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.smartai-header-text small {
  font-size: 0.7rem;
  opacity: 0.8;
  display: block;
  margin-top: 2px;
}

.smartai-header-actions {
  display: flex;
  gap: 4px;
  position: relative;
  z-index: 1;
}

.smartai-header-actions button {
  background: rgba(255,255,255,0.15);
  border: none;
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: var(--smartai-radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: background var(--smartai-transition);
}

.smartai-header-actions button:hover {
  background: rgba(255,255,255,0.25);
}

/* ── Context Badge ── */
.smartai-context-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 6px 10px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--smartai-radius-sm);
  font-size: 0.7rem;
  color: rgba(255,255,255,0.9);
  position: relative;
  z-index: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.smartai-context-badge i {
  font-size: 12px;
  flex-shrink: 0;
}

/* ── Messages Area ── */
.smartai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--smartai-surface);
}

.smartai-messages::-webkit-scrollbar {
  width: 4px;
}

.smartai-messages::-webkit-scrollbar-track {
  background: var(--smartai-scrollbar-track);
}

.smartai-messages::-webkit-scrollbar-thumb {
  background: var(--smartai-scrollbar-thumb);
  border-radius: 2px;
}

/* ── Welcome Message ── */
.smartai-welcome {
  text-align: center;
  padding: 24px 16px;
}

.smartai-welcome-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--smartai-radius);
  background: var(--smartai-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
  color: #fff;
}

.smartai-welcome h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--smartai-text);
  margin: 0 0 4px;
}

.smartai-welcome p {
  font-size: 0.8rem;
  color: var(--smartai-text-secondary);
  margin: 0 0 16px;
  line-height: 1.5;
}

/* ── Quick Actions ── */
.smartai-quick-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.smartai-quick-btn {
  padding: 8px 10px;
  border: 1px solid var(--smartai-border);
  border-radius: var(--smartai-radius-sm);
  background: var(--smartai-bg);
  cursor: pointer;
  font-size: 0.72rem;
  color: var(--smartai-text);
  transition: all var(--smartai-transition);
  text-align: center;
  line-height: 1.3;
}

.smartai-quick-btn:hover {
  background: var(--smartai-primary);
  color: #fff;
  border-color: var(--smartai-primary);
  transform: translateY(-1px);
}

.smartai-quick-btn i {
  display: block;
  font-size: 16px;
  margin-bottom: 4px;
}

.smartai-quick-btn:hover i {
  color: #fff;
}

/* ── Message Bubbles ── */
.smartai-message {
  display: flex;
  gap: 8px;
  max-width: 88%;
  animation: smartai-msg-in 0.3s ease-out;
}

@keyframes smartai-msg-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.smartai-message.smartai-bot {
  align-self: flex-start;
}

.smartai-message-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--smartai-radius-full);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}

.smartai-user .smartai-message-avatar {
  background: var(--smartai-primary);
  color: #fff;
}

.smartai-bot .smartai-message-avatar {
  background: var(--smartai-border);
  color: var(--smartai-text-secondary);
}

.smartai-message-content {
  padding: 10px 14px;
  border-radius: var(--smartai-radius);
  font-size: 0.82rem;
  line-height: 1.55;
  word-wrap: break-word;
}

.smartai-user .smartai-message-content {
  background: var(--smartai-user-bubble);
  color: var(--smartai-user-text);
  border-bottom-right-radius: 4px;
}

.smartai-bot .smartai-message-content {
  background: var(--smartai-bot-bubble);
  color: var(--smartai-bot-text);
  border-bottom-left-radius: 4px;
}

.smartai-message-time {
  font-size: 0.6rem;
  margin-top: 4px;
  opacity: 0.6;
  text-align: right;
}

.smartai-user .smartai-message-time {
  color: var(--smartai-user-text);
}

.smartai-bot .smartai-message-time {
  color: var(--smartai-text-muted);
}

/* ── Typing Indicator ── */
.smartai-typing {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 10px 14px;
  background: var(--smartai-bot-bubble);
  border-radius: var(--smartai-radius);
  border-bottom-left-radius: 4px;
  align-self: flex-start;
  max-width: 80px;
}

.smartai-typing-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--smartai-radius-full);
  background: var(--smartai-text-muted);
  animation: smartai-bounce 1.4s ease-in-out infinite;
}

.smartai-typing-dot:nth-child(1) { animation-delay: 0s; }
.smartai-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.smartai-typing-dot:nth-child(3) { animation-delay: 0.4s; }

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

/* ── Message Actions ── */
.smartai-msg-actions {
  display: flex;
  gap: 4px;
  margin-top: 4px;
  justify-content: flex-end;
  opacity: 0;
  transition: opacity var(--smartai-transition);
}

.smartai-bot .smartai-message-content:hover + .smartai-msg-actions,
.smartai-msg-actions:hover {
  opacity: 1;
}

.smartai-msg-actions button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--smartai-text-muted);
  transition: all var(--smartai-transition);
}

.smartai-msg-actions button:hover {
  background: var(--smartai-surface-hover);
  color: var(--smartai-text);
}

/* ── Markdown Styling ── */
.smartai-message-content p {
  margin: 0 0 8px;
}

.smartai-message-content p:last-child {
  margin-bottom: 0;
}

.smartai-message-content strong {
  font-weight: 700;
}

.smartai-message-content em {
  font-style: italic;
}

.smartai-message-content ul,
.smartai-message-content ol {
  margin: 6px 0;
  padding-left: 20px;
}

.smartai-message-content li {
  margin-bottom: 4px;
}

.smartai-message-content h1,
.smartai-message-content h2,
.smartai-message-content h3,
.smartai-message-content h4 {
  margin: 12px 0 6px;
  font-weight: 700;
  line-height: 1.3;
}

.smartai-message-content h1 { font-size: 1.1rem; }
.smartai-message-content h2 { font-size: 1rem; }
.smartai-message-content h3 { font-size: 0.92rem; }
.smartai-message-content h4 { font-size: 0.85rem; }

.smartai-message-content a {
  color: var(--smartai-primary);
  text-decoration: underline;
}

.smartai-message-content blockquote {
  border-left: 3px solid var(--smartai-primary);
  padding: 6px 12px;
  margin: 8px 0;
  background: rgba(37,99,235,0.05);
  border-radius: 0 var(--smartai-radius-sm) var(--smartai-radius-sm) 0;
  color: var(--smartai-text-secondary);
}

/* ── Code Blocks ── */
.smartai-message-content code {
  font-family: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.78rem;
}

.smartai-message-content p > code,
.smartai-message-content li > code {
  background: var(--smartai-code-bg);
  color: var(--smartai-code-text);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.75rem;
}

.smartai-message-content pre {
  background: var(--smartai-code-bg);
  color: var(--smartai-code-text);
  padding: 14px 16px;
  border-radius: var(--smartai-radius-sm);
  overflow-x: auto;
  margin: 8px 0;
  position: relative;
}

.smartai-message-content pre code {
  background: none;
  padding: 0;
  color: inherit;
  font-size: 0.78rem;
  line-height: 1.6;
}

/* ── Input Area ── */
.smartai-input-area {
  padding: 12px 16px;
  border-top: 1px solid var(--smartai-border);
  background: var(--smartai-bg);
  flex-shrink: 0;
}

.smartai-input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  background: var(--smartai-input-bg);
  border: 1px solid var(--smartai-input-border);
  border-radius: var(--smartai-radius);
  padding: 4px 4px 4px 14px;
  transition: border-color var(--smartai-transition);
}

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

.smartai-input-wrapper textarea {
  flex: 1;
  border: none;
  background: transparent;
  outline: none;
  resize: none;
  padding: 8px 0;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--smartai-text);
  line-height: 1.4;
  max-height: 120px;
  min-height: 20px;
}

.smartai-input-wrapper textarea::placeholder {
  color: var(--smartai-text-muted);
}

.smartai-send-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--smartai-radius-sm);
  border: none;
  background: var(--smartai-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 18px;
  flex-shrink: 0;
  transition: all var(--smartai-transition);
}

.smartai-send-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 2px 8px rgba(37,99,235,0.3);
}

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

.smartai-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* ── Stop Button ── */
.smartai-stop-btn {
  display: none;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  border: none;
  background: #ef4444;
  color: #fff;
  cursor: pointer;
  font-size: 12px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--smartai-transition);
}

.smartai-stop-btn:hover {
  background: #dc2626;
}

.smartai-input-wrapper.smartai-loading .smartai-stop-btn {
  display: flex;
}

/* ── Footer Note ── */
.smartai-footer-note {
  text-align: center;
  font-size: 0.6rem;
  color: var(--smartai-text-muted);
  padding: 6px 16px 8px;
  background: var(--smartai-bg);
  border-top: 1px solid var(--smartai-border);
  flex-shrink: 0;
}

.smartai-footer-note small {
  opacity: 0.7;
}

/* ── Responsive ── */
@media (max-width: 576px) {
  #smartai-fab {
    bottom: 16px;
    right: 16px;
    width: 52px;
    height: 52px;
    font-size: 22px;
  }

  #smartai-widget {
    bottom: 0;
    right: 0;
    width: 100vw;
    max-width: 100vw;
    height: 100vh;
    max-height: 100vh;
    border-radius: 0;
    border: none;
  }

  .smartai-message {
    max-width: 92%;
  }
}

/* ── Error Toast inside widget ── */
.smartai-error-toast {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  padding: 8px 12px;
  border-radius: var(--smartai-radius-sm);
  font-size: 0.78rem;
  margin: 8px 16px 0;
  text-align: center;
  animation: smartai-msg-in 0.3s ease-out;
  flex-shrink: 0;
}

[data-theme="dark"] .smartai-error-toast {
  background: #451a1a;
  border-color: #7f1d1d;
  color: #fca5a5;
}

/* ── Keyboard shortcut badge ── */
.smartai-shortcut-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.65rem;
  padding: 2px 6px;
  background: rgba(255,255,255,0.15);
  border-radius: 4px;
  margin-left: 8px;
}

.smartai-shortcut-badge kbd {
  font-family: inherit;
  font-weight: 600;
}

/* ── Smooth scroll container ── */
.smartai-messages {
  scroll-behavior: smooth;
}