/* ==========================================================================
   AI Assistant — Redesigned Styles
   Clean, modern chat interface with solid dark surfaces
   ========================================================================== */

/* ── Design Tokens ── */
:root {
  --assistant-primary: #18d26e;
  --assistant-primary-hover: #22e87e;
  --assistant-primary-rgb: 24, 210, 110;

  /* Surfaces */
  --assistant-surface: rgba(12, 12, 14, 0.98);
  --assistant-surface-elevated: rgba(255, 255, 255, 0.08);
  --assistant-surface-hover: rgba(255, 255, 255, 0.11);

  /* Borders */
  --assistant-border-focus: rgba(24, 210, 110, 0.5);

  /* Text */
  --assistant-text-primary: rgba(255, 255, 255, 0.92);
  --assistant-text-secondary: rgba(255, 255, 255, 0.6);
  --assistant-text-muted: rgba(255, 255, 255, 0.38);

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 0.15s;
  --duration-normal: 0.25s;
  --duration-slow: 0.35s;
}

/* ── Main Container ── */
.ai-assistant {
  position: fixed;
  bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px));
  right: calc(1.5rem + env(safe-area-inset-right, 0px));
  z-index: 1000;
  font-family: "Open Sans", sans-serif;
  max-width: 24rem;
  user-select: none;
}

.ai-assistant.hidden {
  display: none;
}

/* ── Chat Widget ── */
.chat-widget {
  background: var(--assistant-surface);
  border-radius: 1rem;
  border: 1px solid rgba(var(--assistant-primary-rgb), 0.18);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5),
              0 0 40px rgba(var(--assistant-primary-rgb), 0.06);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  width: 24rem;
  height: 34rem;
  transform-origin: bottom right;
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
  transform: translateY(0) scale(1);
  opacity: 1;
  touch-action: pan-y;
}

.chat-widget.opening {
  animation: widgetOpen var(--duration-slow) var(--ease-out) forwards;
}

.chat-widget.closing {
  animation: widgetClose var(--duration-normal) var(--ease-default) forwards;
}

.chat-widget.minimized {
  animation: widgetMinimize var(--duration-normal) var(--ease-default) forwards;
}

@keyframes widgetOpen {
  from { opacity: 0; transform: translateY(12px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes widgetClose {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(12px) scale(0.95); }
}

@keyframes widgetMinimize {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(20px) scale(0.9); }
}

/* Swipe indicator for mobile */
.chat-widget.swipe-indicator::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 2.5rem;
  height: 3px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  pointer-events: none;
}

/* ── Chat Header ── */
.chat-header {
  padding: 0.875rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: linear-gradient(135deg, rgba(var(--assistant-primary-rgb), 0.12) 0%, rgba(var(--assistant-primary-rgb), 0.04) 100%);
  border-bottom: 1px solid rgba(var(--assistant-primary-rgb), 0.1);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-default);
  flex-shrink: 0;
}

.chat-header:hover {
  background: linear-gradient(135deg, rgba(var(--assistant-primary-rgb), 0.16) 0%, rgba(var(--assistant-primary-rgb), 0.06) 100%);
}

.assistant-info {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.assistant-avatar {
  width: 2.125rem;
  height: 2.125rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--assistant-primary), #14b85e);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #040404;
  font-size: 0.875rem;
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(var(--assistant-primary-rgb), 0.12);
  transition: box-shadow var(--duration-fast) var(--ease-default);
}

.assistant-details h4 {
  color: var(--assistant-primary);
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.assistant-details span {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--assistant-text-secondary);
  font-size: 0.75rem;
  line-height: 1;
  margin-top: 0.125rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--assistant-primary);
  animation: statusBreathe 3s ease-in-out infinite;
}

@keyframes statusBreathe {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(var(--assistant-primary-rgb), 0.4); }
  50%      { opacity: 0.7; box-shadow: 0 0 6px 2px rgba(var(--assistant-primary-rgb), 0.15); }
}

.chat-controls {
  display: flex;
  gap: 0.25rem;
}

.control-btn {
  width: 1.75rem;
  height: 1.75rem;
  border: none;
  background: transparent;
  border-radius: 0.375rem;
  color: var(--assistant-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background var(--duration-fast) var(--ease-default),
              color var(--duration-fast) var(--ease-default);
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--assistant-text-primary);
}

.control-btn:active {
  transform: scale(0.92);
}

.control-btn:focus-visible {
  outline: 2px solid var(--assistant-primary);
  outline-offset: 1px;
}

/* ── Messages Area ── */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem 1rem;
  scroll-behavior: smooth;
  -webkit-overflow-scrolling: touch;
}

/* Custom scrollbar */
.chat-messages::-webkit-scrollbar {
  width: 4px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ── Message Bubbles ── */
.message {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-bottom: 0.625rem;
  animation: messageIn var(--duration-normal) var(--ease-out);
}

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

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

.message-avatar {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  flex-shrink: 0;
  margin-top: 0.25rem;
}

.message.assistant .message-avatar {
  background: rgba(var(--assistant-primary-rgb), 0.15);
  color: var(--assistant-primary);
}

.message.user .message-avatar {
  background: rgba(255, 255, 255, 0.08);
  color: var(--assistant-text-muted);
}

.message-content {
  max-width: 82%;
  padding: 0.625rem 0.875rem;
  border-radius: 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.55;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* Assistant message */
.message.assistant .message-content {
  background: var(--assistant-surface-elevated);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--assistant-text-primary);
  border-bottom-left-radius: 0.25rem;
}

/* User message */
.message.user .message-content {
  background: var(--assistant-primary);
  color: #040404;
  border-bottom-right-radius: 0.25rem;
  box-shadow: 0 2px 12px rgba(var(--assistant-primary-rgb), 0.18);
}

/* Timestamp */
.message-timestamp,
.message-time {
  text-align: center;
  font-size: 0.6875rem;
  color: var(--assistant-text-muted);
  margin: 0.5rem 0;
}

/* ── Rich Content in Messages ── */
.message.assistant .message-content h4 {
  color: var(--assistant-primary);
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
}

.message.assistant .message-content p {
  margin: 0 0 0.375rem;
  line-height: 1.55;
}

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

.message.assistant .message-content strong {
  color: var(--assistant-primary);
  font-weight: 600;
}

.message.assistant .message-content em {
  color: var(--assistant-text-secondary);
  font-style: italic;
}

.message.assistant .message-content code {
  background: rgba(255, 255, 255, 0.08);
  color: var(--assistant-primary);
  padding: 0.125rem 0.375rem;
  border-radius: 0.25rem;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 0.8125rem;
  border: none;
}

.message.assistant .message-content ul {
  list-style: none;
  padding-left: 1rem;
  margin: 0.25rem 0;
}

.message.assistant .message-content li {
  position: relative;
  margin-bottom: 0.25rem;
  line-height: 1.5;
}

.message.assistant .message-content li::before {
  content: '';
  position: absolute;
  left: -0.75rem;
  top: 0.55em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--assistant-primary);
}

.message.assistant .message-content a {
  color: var(--assistant-primary);
  text-decoration: none;
  transition: opacity var(--duration-fast) var(--ease-default);
}

.message.assistant .message-content a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* User message links */
.message.user .message-content a {
  color: #040404;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ── Typing Indicator ── */
.typing-indicator {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity var(--duration-normal) var(--ease-default),
              transform var(--duration-normal) var(--ease-default);
}

.typing-indicator.active {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.typing-indicator .assistant-avatar {
  width: 1.5rem;
  height: 1.5rem;
  font-size: 0.5rem;
}

.typing-dots {
  display: flex;
  gap: 3px;
  align-items: center;
}

.typing-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--assistant-primary);
  animation: typingBounce 1.4s ease-in-out infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.15s; }
.typing-dot:nth-child(3) { animation-delay: 0.3s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.3; }
  30%            { transform: translateY(-4px); opacity: 1; }
}

/* ── Input Area ── */
.chat-input {
  padding: 0.75rem 1rem;
  border-top: 1px solid rgba(var(--assistant-primary-rgb), 0.06);
  flex-shrink: 0;
}

.input-container {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  background: var(--assistant-surface-elevated);
  border-radius: 0.75rem;
  padding: 0.375rem 0.375rem 0.375rem 0.875rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: border-color var(--duration-fast) var(--ease-default),
              background var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
}

.input-container:focus-within {
  border-color: var(--assistant-border-focus);
  background: var(--assistant-surface-hover);
  box-shadow: 0 0 0 3px rgba(var(--assistant-primary-rgb), 0.1),
              0 0 16px rgba(var(--assistant-primary-rgb), 0.06);
}

.message-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--assistant-text-primary);
  font-family: inherit;
  font-size: 0.8125rem;
  line-height: 1.4;
  padding: 0.25rem 0;
  max-height: 4rem;
  overflow-y: auto;
}

.message-input::placeholder {
  color: var(--assistant-text-muted);
  font-style: normal;
}

.message-input::-webkit-scrollbar {
  width: 3px;
}

.message-input::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
}

.send-btn {
  width: 2rem;
  height: 2rem;
  background: var(--assistant-primary);
  border: none;
  border-radius: 0.5rem;
  color: #040404;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: background var(--duration-fast) var(--ease-default),
              opacity var(--duration-fast) var(--ease-default);
}

.send-btn:hover:not(:disabled) {
  background: var(--assistant-primary-hover);
}

.send-btn:active:not(:disabled) {
  transform: scale(0.95);
}

.send-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.send-btn:focus-visible {
  outline: 2px solid var(--assistant-primary);
  outline-offset: 2px;
}

/* ── Quick Actions ── */
.quick-actions {
  padding: 0.625rem 1rem 0.75rem;
  border-top: 1px solid rgba(var(--assistant-primary-rgb), 0.06);
  flex-shrink: 0;
}

.quick-actions-title {
  color: var(--assistant-text-secondary);
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.quick-actions-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.quick-action {
  background: rgba(var(--assistant-primary-rgb), 0.08);
  border: 1px solid rgba(var(--assistant-primary-rgb), 0.18);
  color: rgba(255, 255, 255, 0.75);
  padding: 0.375rem 0.75rem;
  border-radius: 2rem;
  font-size: 0.75rem;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-default),
              border-color var(--duration-fast) var(--ease-default),
              color var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
  white-space: nowrap;
}

.quick-action:hover {
  background: rgba(var(--assistant-primary-rgb), 0.18);
  border-color: rgba(var(--assistant-primary-rgb), 0.4);
  color: var(--assistant-primary);
  box-shadow: 0 2px 12px rgba(var(--assistant-primary-rgb), 0.1);
}

.quick-action:active {
  transform: scale(0.97);
}

.quick-action:focus-visible {
  outline: 2px solid var(--assistant-primary);
  outline-offset: 1px;
}

/* ── Welcome Message ── */
.welcome-message {
  padding: 1.75rem 1.25rem;
  text-align: center;
  color: var(--assistant-text-secondary);
  background: linear-gradient(135deg, rgba(var(--assistant-primary-rgb), 0.08) 0%, rgba(var(--assistant-primary-rgb), 0.03) 100%);
  border-radius: 0.75rem;
  margin: 0.5rem 0;
  border: 1px solid rgba(var(--assistant-primary-rgb), 0.12);
}

.welcome-message .ai-icon {
  font-size: 2rem;
  color: var(--assistant-primary);
  margin-bottom: 0.75rem;
  display: block;
  animation: gentleFloat 4s ease-in-out infinite;
  filter: drop-shadow(0 0 8px rgba(var(--assistant-primary-rgb), 0.4));
}

@keyframes gentleFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-4px); }
}

.welcome-message h3 {
  color: var(--assistant-primary);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 0.5rem;
  line-height: 1.3;
}

.welcome-message p {
  font-size: 0.8125rem;
  line-height: 1.55;
  opacity: 0.7;
  margin: 0;
}

/* ── FAB (Floating Action Button) ── */
.chat-fab {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 3.75rem;
  height: 3.75rem;
  background: linear-gradient(135deg, #18d26e, #0fbb5e);
  border-radius: 50%;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4),
              0 0 24px rgba(var(--assistant-primary-rgb), 0.25);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #040404;
  font-size: 1.375rem;
  transition: transform var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
  overflow: visible;
}

/* Idle ring pulse */
.chat-fab::before {
  content: '';
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 2px solid rgba(var(--assistant-primary-rgb), 0.3);
  animation: fabRingPulse 3s ease-in-out infinite;
  pointer-events: none;
}

@keyframes fabRingPulse {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50%      { transform: scale(1.25); opacity: 0; }
}

.chat-fab.visible {
  animation: fabAppear var(--duration-slow) var(--ease-out) forwards;
}

.chat-fab.hidden {
  opacity: 0;
  visibility: hidden;
  transform: scale(0.8);
  transition: all var(--duration-normal) var(--ease-default);
}

@keyframes fabAppear {
  from { opacity: 0; visibility: hidden; transform: scale(0.8); }
  to   { opacity: 1; visibility: visible; transform: scale(1); }
}

.chat-fab:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5),
              0 0 32px rgba(var(--assistant-primary-rgb), 0.35);
}

.chat-fab:active {
  transform: translateY(0) scale(0.96);
  transition-duration: var(--duration-fast);
}

.chat-fab:focus-visible {
  outline: 2px solid var(--assistant-primary);
  outline-offset: 3px;
}

/* ── Notification Badge ── */
.notification-badge {
  position: absolute;
  top: -0.25rem;
  right: -0.25rem;
  width: 1.25rem;
  height: 1.25rem;
  background: #ff4757;
  border-radius: 50%;
  border: 2px solid #0a0a0a;
  color: #040404;
  font-size: 0.625rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1001;
  opacity: 0;
  transform: scale(0);
  transition: opacity var(--duration-fast) var(--ease-default),
              transform var(--duration-fast) var(--ease-default);
  box-shadow: 0 2px 8px rgba(var(--assistant-primary-rgb), 0.35);
}

.notification-badge.visible {
  opacity: 1;
  transform: scale(1);
}

.notification-badge.hidden {
  opacity: 0;
  transform: scale(0);
}

/* ── Responsive: Tablet & below ── */
@media (max-width: 1024px) {
  .ai-assistant {
    max-width: 22.5rem;
  }

  .chat-widget {
    width: 22.5rem;
    height: 30rem;
  }
}

/* ── Responsive: Large phones — Near-fullscreen bottom sheet ── */
@media (max-width: 767px) {
  .ai-assistant {
    max-width: none;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  }

  .chat-fab {
    right: auto;
    left: 50%;
    transform: translateX(-50%);
    bottom: 1rem;
  }

  .chat-fab:hover {
    transform: translateX(-50%) translateY(-2px);
  }

  .chat-fab:active {
    transform: translateX(-50%) scale(0.96);
  }

  .chat-fab::before {
    display: none;
  }

  .chat-fab.visible {
    animation: fabAppear var(--duration-slow) var(--ease-out) forwards;
  }

  @keyframes fabAppear {
    from { opacity: 0; transform: translateX(-50%) scale(0.8); }
    to   { opacity: 1; transform: translateX(-50%) scale(1); }
  }

  /* Near-fullscreen bottom sheet */
  .chat-widget {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-width: none;
    height: 75dvh;
    border-radius: 1rem 1rem 0 0;
    transform-origin: bottom center;
    /* Smooth transition when keyboard opens/closes */
    transition: height 0.2s ease-out, top 0.2s ease-out;
  }

  /* Slide-up open animation for mobile */
  .chat-widget.opening {
    animation: widgetSlideUp var(--duration-slow) var(--ease-out) forwards;
    transition: none;
  }

  @keyframes widgetSlideUp {
    from { opacity: 0; transform: translateY(100%); }
    to   { opacity: 1; transform: translateY(0); }
  }

  /* Slide-down close/minimize animation for mobile */
  .chat-widget.closing,
  .chat-widget.minimized {
    animation: widgetSlideDown var(--duration-normal) var(--ease-default) forwards;
    transition: none;
  }

  @keyframes widgetSlideDown {
    from { opacity: 1; transform: translateY(0); }
    to   { opacity: 0; transform: translateY(100%); }
  }

  /* Safe area padding for input on notched iPhones */
  .chat-input {
    padding-bottom: calc(0.75rem + env(safe-area-inset-bottom, 0px));
  }

  .notification-badge {
    width: 1.125rem;
    height: 1.125rem;
    font-size: 0.5625rem;
  }

  /* Body scroll lock when chat is open */
  body.chat-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
  }

  /* Hide chatbot when viewing a section (not landing page) */
  .ai-assistant.section-hidden {
    display: none !important;
  }
}

/* ── Responsive: Small phones ── */
@media (max-width: 480px) {
  .chat-fab {
    width: 3.25rem;
    height: 3.25rem;
    font-size: 1.25rem;
  }

  .assistant-avatar {
    width: 1.875rem;
    height: 1.875rem;
    font-size: 0.75rem;
  }

  .assistant-details h4 {
    font-size: 0.8125rem;
  }

  .message-content {
    font-size: 0.8125rem;
    padding: 0.5rem 0.75rem;
  }

  .message-input {
    font-size: 1rem; /* Prevent iOS zoom */
  }

  .quick-action {
    font-size: 0.6875rem;
    padding: 0.3125rem 0.625rem;
  }
}

/* ── Landscape on phones ── */
@media (max-width: 767px) and (orientation: landscape) {
  .chat-widget {
    max-height: calc(100dvh - 2.5rem);
    min-height: 0;
  }
}

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

/* ── Accessibility: High contrast ── */
@media (prefers-contrast: high) {
  .chat-widget {
    border-width: 2px;
    border-color: rgba(255, 255, 255, 0.3);
  }

  .message.assistant .message-content {
    border: 1px solid rgba(255, 255, 255, 0.25);
  }

  .chat-fab {
    border-width: 2px;
  }
}