@layer blocks {
  /* ==========================================================================
     Chat Widget — floating panel with WebSocket messaging
     ========================================================================== */

  /* ----------------------------------------
     Root container — fixed position anchor
  ---------------------------------------- */
  .chat {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    z-index: var(--z-chat);
  }

  /* ----------------------------------------
     Toggle button — opens the chat panel
  ---------------------------------------- */
  .chat-toggle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    background: var(--color-accent);
    color: var(--color-bg);
    cursor: pointer;
    display: grid;
    place-items: center;
    position: relative;
    box-shadow: 0 4px 12px hsl(198deg 93% 60% / 0.3);
    transition:
      background-color var(--duration-normal) ease,
      box-shadow var(--duration-normal) ease;
  }

  .chat-toggle:hover {
    background: var(--color-accent-hover);
  }

  .chat-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
  }

  /* Hide toggle when panel is open */
  .chat[data-state='open'] .chat-toggle {
    pointer-events: none;
    opacity: 0;
  }

  /* ----------------------------------------
     Glow animation — pulse ring base styles
     (::before positioned outside media query)
  ---------------------------------------- */
  .chat-toggle::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid var(--color-accent);
    pointer-events: none;
    opacity: 0;
  }

  /* Stop animations once user has interacted */
  .chat[data-interacted] .chat-toggle {
    animation: none;
    box-shadow: 0 4px 12px hsl(198deg 93% 60% / 0.3);
  }

  .chat[data-interacted] .chat-toggle::before {
    animation: none;
    opacity: 0;
  }

  @media (prefers-reduced-motion: no-preference) {
    .chat-toggle {
      animation: chat-glow 3s var(--ease-out-expo) infinite;
    }

    .chat-toggle::before {
      animation: chat-pulse-ring 2s ease-out infinite;
    }

    /* Re-affirm: stop on interaction inside motion query too */
    .chat[data-interacted] .chat-toggle {
      animation: none;
    }

    .chat[data-interacted] .chat-toggle::before {
      animation: none;
    }
  }

  @keyframes chat-glow {
    0%,
    100% {
      box-shadow:
        0 4px 12px hsl(198deg 93% 60% / 0.3),
        0 0 20px hsl(198deg 93% 60% / 0.15),
        0 0 40px hsl(198deg 93% 60% / 0.05);
    }

    50% {
      box-shadow:
        0 4px 16px hsl(198deg 93% 60% / 0.5),
        0 0 30px hsl(198deg 93% 60% / 0.3),
        0 0 60px hsl(198deg 93% 60% / 0.1);
    }
  }

  @keyframes chat-pulse-ring {
    0% {
      transform: scale(1);
      opacity: 0.8;
    }

    100% {
      transform: scale(1.5);
      opacity: 0;
    }
  }

  /* ----------------------------------------
     Panel — slides up from toggle origin
     GSAP controls open/close transforms
  ---------------------------------------- */
  .chat-panel {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 380px;
    height: min(520px, 80vh);
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px hsl(0deg 0% 0% / 0.4);
    overflow: hidden;
    transform-origin: bottom right;
    pointer-events: none;
    opacity: 0;
    transform: scale(0);
  }

  .chat[data-state='open'] .chat-panel {
    pointer-events: auto;
  }

  /* ----------------------------------------
     Header — title + close button
  ---------------------------------------- */
  .chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-surface-raised);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
  }

  .chat-status {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
  }

  .chat-status::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent);
    flex-shrink: 0;
  }

  .chat-status[data-online]::before {
    background: var(--color-success);
  }

  .chat-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
  }

  .chat-close,
  .chat-new,
  .chat-history-toggle {
    width: 32px;
    height: 32px;
    display: grid;
    place-items: center;
    background: transparent;
    border: none;
    color: var(--color-text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition:
      color var(--duration-fast) ease,
      background-color var(--duration-fast) ease;
  }

  .chat-close:hover,
  .chat-new:hover,
  .chat-history-toggle:hover {
    color: var(--color-text);
    background: hsl(0deg 0% 100% / 0.05);
  }

  .chat-close:focus-visible,
  .chat-new:focus-visible,
  .chat-history-toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
  }

  /* ----------------------------------------
     Messages area — scrollable feed
  ---------------------------------------- */
  .chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--color-border) transparent;
  }

  .chat-messages::-webkit-scrollbar {
    width: 6px;
  }

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

  .chat-messages::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 3px;
  }

  /* ----------------------------------------
     Message bubbles
  ---------------------------------------- */
  .chat-message {
    max-width: 85%;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    overflow-wrap: break-word;
  }

  .chat-message[data-sender='visitor'] {
    align-self: flex-end;
    background: var(--color-accent);
    color: var(--color-bg);
  }

  .chat-message[data-sender='ai'] {
    align-self: flex-start;
    background: var(--color-surface-raised);
    color: var(--color-text);
    border: 1px solid var(--color-border);
  }

  .chat-message[data-sender='admin'] {
    align-self: flex-start;
    background: var(--color-surface-raised);
    color: var(--color-text);
    border: 1px solid var(--color-success);
  }

  .chat-message-text {
    margin: 0;
  }

  /* Markdown content in AI messages */
  .chat-message[data-sender='ai'] .chat-message-text p {
    margin: 0.4em 0;
  }

  .chat-message[data-sender='ai'] .chat-message-text p:first-child {
    margin-block-start: 0;
  }

  .chat-message[data-sender='ai'] .chat-message-text p:last-child {
    margin-block-end: 0;
  }

  .chat-message[data-sender='ai'] .chat-message-text code {
    font-family: var(--font-mono);
    font-size: 0.88em;
    background: var(--color-accent-subtle);
    padding: 0.15em 0.35em;
    border-radius: var(--radius-sm);
  }

  .chat-message[data-sender='ai'] .chat-message-text pre {
    margin: 0.4em 0;
    overflow: auto;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    padding: var(--space-sm);
    max-height: 12rem;
  }

  .chat-message[data-sender='ai'] .chat-message-text pre code {
    background: none;
    padding: 0;
    font-size: 0.85em;
    line-height: 1.5;
  }

  .chat-message[data-sender='ai'] .chat-message-text ul,
  .chat-message[data-sender='ai'] .chat-message-text ol {
    margin: 0.4em 0;
    padding-inline-start: 1.25em;
  }

  .chat-message[data-sender='ai'] .chat-message-text li {
    margin-block: 0.2em;
  }

  .chat-message[data-sender='ai'] .chat-message-text strong {
    font-weight: 600;
  }

  .chat-message[data-sender='ai'] .chat-message-text a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--duration-fast) ease;
  }

  .chat-message[data-sender='ai'] .chat-message-text a:hover {
    color: var(--color-accent-hover);
  }

  .chat-message[data-sender='ai'] .chat-message-text a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
  }

  .chat-message-time {
    display: block;
    font-size: 0.7rem;
    margin-block-start: var(--space-xs);
    opacity: 0.6;
  }

  .chat-message[data-sender='visitor'] .chat-message-time {
    text-align: right;
  }

  /* ----------------------------------------
     Typing indicator — three bouncing dots
  ---------------------------------------- */
  .chat-typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: var(--space-sm) var(--space-md);
    align-self: flex-start;
  }

  .chat-typing-indicator[hidden] {
    display: none;
  }

  .chat-typing-indicator span {
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-text-muted);
  }

  @media (prefers-reduced-motion: no-preference) {
    .chat-typing-indicator span {
      animation: chat-typing-bounce 1.4s ease-in-out infinite;
    }

    .chat-typing-indicator span:nth-child(2) {
      animation-delay: 0.2s;
    }

    .chat-typing-indicator span:nth-child(3) {
      animation-delay: 0.4s;
    }
  }

  @keyframes chat-typing-bounce {
    0%,
    60%,
    100% {
      transform: translateY(0);
    }

    30% {
      transform: translateY(-8px);
    }
  }

  /* ----------------------------------------
     Input form — textarea + send button
  ---------------------------------------- */
  .chat-input {
    display: flex;
    align-items: flex-end;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-surface-raised);
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
  }

  .chat-textarea {
    flex: 1;
    resize: none;
    border: 1px solid transparent;
    background: var(--color-surface);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    font-family: var(--font-body);
    line-height: 1.5;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    min-height: 40px;
    max-height: 120px;
    field-sizing: content;
    transition:
      border-color var(--duration-fast) ease,
      box-shadow var(--duration-fast) ease;
  }

  .chat-textarea::placeholder {
    color: var(--color-text-muted);
    opacity: 0.6;
  }

  .chat-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px var(--color-accent-subtle);
  }

  .chat-send {
    width: 40px;
    height: 40px;
    display: grid;
    place-items: center;
    background: var(--color-accent);
    color: var(--color-bg);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    flex-shrink: 0;
    transition:
      background-color var(--duration-fast) ease,
      transform var(--duration-fast) ease;
  }

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

  .chat-send:active {
    transform: scale(0.92);
  }

  .chat-send:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
  }

  .chat-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
  }

  /* ----------------------------------------
     History view — list of past sessions
  ---------------------------------------- */
  .chat-history-empty {
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    padding: var(--space-xl) var(--space-md);
    margin: 0;
  }

  .chat-history-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: var(--font-size-sm);
    transition:
      border-color var(--duration-fast) ease,
      background-color var(--duration-fast) ease;
  }

  .chat-history-item:hover {
    border-color: var(--color-accent);
    background: hsl(198deg 93% 60% / 0.05);
  }

  .chat-history-item:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
  }

  .chat-history-preview {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    line-height: 1.4;
  }

  .chat-history-date {
    font-size: 0.7rem;
    color: var(--color-text-muted);
  }

  /* ----------------------------------------
     Mobile — full-screen panel
  ---------------------------------------- */
  @media (width <= 480px) {
    .chat {
      bottom: 0;
      right: 0;
      left: 0;
    }

    .chat-toggle {
      position: fixed;
      bottom: var(--space-md);
      right: var(--space-md);
    }

    .chat-panel {
      position: fixed;
      inset: 0;
      width: 100%;
      height: 100%;
      border-radius: 0;
      box-shadow: none;
    }
  }
}