/* Modal, chat transcript, reasoning, and source styles. */

  /* --- Modal --- */

  .modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 400;
    background: rgba(15, 15, 15, 0.7);
    backdrop-filter: blur(5px);
    align-items: flex-start;
    justify-content: center;
    padding: 80px 24px 80px;
    overflow-y: auto;
  }

  .modal-overlay.open { display: flex; }

  .modal-box {
    width: min(820px, 100%);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 24px 48px rgba(15, 15, 15, 0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex-shrink: 0;
  }

  .modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .modal-header-title {
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--muted-strong);
  }

  .modal-close {
    flex-shrink: 0;
    background: none;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--muted);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    padding: 5px 12px;
    transition: border-color 0.15s, color 0.15s;
  }

  .modal-close:hover {
    border-color: rgba(34, 179, 74, 0.5);
    color: var(--text);
  }

  .modal-body {
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .modal-section-label {
    font-size: 0.69rem;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--muted);
    font-weight: 600;
    margin-bottom: 8px;
  }

  .modal-section-text {
    font-size: 0.93rem;
    color: var(--text);
    line-height: 1.65;
    white-space: pre-wrap;
    word-break: break-word;
  }

  /* Monospace block for persisted error tracebacks (errorHtml). */
  .modal-code-block {
    margin-top: 8px;
    padding: 10px 12px;
    font-family: var(--font-mono);
    font-size: var(--font-control-sm);
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-md);
    overflow-x: auto;
    white-space: pre;
  }

  /* Support-flag conversation transcript */

  .chat-transcript {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .chat-transcript.hide-assistant .chat-bubble-assistant { display: none; }

  .chat-transcript-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--font-control);
    color: var(--text);
    cursor: pointer;
    margin-bottom: 10px;
  }

  .chat-transcript-toggle input { cursor: pointer; }

  .chat-bubble {
    max-width: 80%;
    border: 1px solid var(--panel-border);
    border-radius: 12px;
    padding: 8px 12px;
  }

  .chat-bubble-user {
    align-self: flex-end;
    background: rgba(255, 255, 255, 0.04);
  }

  .chat-bubble-assistant {
    align-self: flex-start;
    background: rgba(37, 99, 235, 0.16);
  }

  .chat-bubble-support {
    align-self: flex-start;
    background: rgba(220, 38, 38, 0.14);
    border-color: rgba(220, 38, 38, 0.4);
  }

  .chat-bubble-meta {
    font-size: 0.69rem;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--muted);
    font-weight: 600;
    margin-bottom: 4px;
  }

  .chat-bubble-body {
    font-size: 0.93rem;
    color: var(--text);
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
  }

  /* Reasoning + Sources modal blocks */

  .reasoning-block {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    background: rgba(255,255,255,0.03);
  }

  .reasoning-block + .reasoning-block { margin-top: 10px; }

  .reasoning-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
    margin-bottom: 8px;
  }

  .reasoning-topic {
    font-family: var(--font-title);
    font-weight: 600;
    color: var(--text);
    font-size: 0.95rem;
  }

  .reasoning-list {
    margin: 6px 0 0 18px;
    color: var(--muted-strong);
    font-size: 0.88rem;
    line-height: 1.55;
  }

  .reasoning-list li + li { margin-top: 3px; }

  .source-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    padding: 8px 0;
    border-bottom: 1px solid var(--divider);
    font-size: 0.88rem;
  }

  .source-row:last-child { border-bottom: none; }

  .source-title {
    color: var(--text);
    font-weight: 600;
  }

  .source-link {
    color: var(--brand-5);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    word-break: break-all;
  }

  .source-link:hover { color: var(--brand-2); text-decoration: underline; }

  .reasoning-section-title {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    color: var(--muted);
    font-weight: 600;
    margin-top: 10px;
    margin-bottom: 4px;
  }