/* chat.html. Colours come from common.css's theme variables only. */
main.chat-main { padding: 24px; }
[hidden] { display: none !important; }
.chat-muted { color: var(--text-muted); font-size: 13px; }
.chat-banner { border: 1px solid var(--border); background: var(--bg-subtle); padding: 10px 14px; margin-bottom: 16px; font-size: 13px; color: var(--text-secondary); }
.chat-new-form h2 { font-size: 16px; color: var(--text); margin-bottom: 10px; }
.chat-code { font-family: var(--mono); font-size: 12px; background: var(--bg-muted); border: 1px solid var(--border); padding: 8px 10px; margin-top: 6px; white-space: pre-wrap; word-break: break-all; color: var(--text); }

.chat-layout { display: grid; grid-template-columns: 280px 1fr; gap: 20px; min-height: 70vh; }
@media (max-width: 760px) { .chat-layout { grid-template-columns: 1fr; } }
.chat-side { display: flex; flex-direction: column; gap: 8px; }
.chat-label { display: block; font-size: 12px; color: var(--text-muted); margin-top: 8px; }
.chat-select, .chat-input { width: 100%; background: var(--bg); color: var(--text); border: 1px solid var(--border); font-family: var(--font); font-size: 14px; padding: 7px 9px; }
.chat-textarea { resize: vertical; font-family: var(--font); }
.chat-device-note { font-size: 12px; color: var(--text-muted); }
.chat-btn { display: inline-block; padding: 6px 12px; background: transparent; border: 1px solid var(--border); color: var(--text-secondary); font-family: var(--font); font-size: 13px; cursor: pointer; text-decoration: none; white-space: nowrap; }
.chat-btn:hover:not(:disabled) { border-color: var(--text); color: var(--text); background: var(--bg-muted); }
.chat-btn:disabled { opacity: 0.5; cursor: not-allowed; }
.chat-primary { border-color: var(--text-secondary); color: var(--text); }
.chat-link { background: none; border: 0; color: var(--text-muted); font-size: 12px; cursor: pointer; font-family: var(--font); }
.chat-link:hover { color: var(--text); }
.chat-new { margin-top: 6px; }
.chat-list-head { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.chat-list { list-style: none; border-top: 1px solid var(--border); }
.chat-list li { border-bottom: 1px solid var(--border); display: flex; align-items: stretch; gap: 4px; }
.chat-list button { width: 100%; text-align: left; background: none; border: 0; padding: 8px 6px; cursor: pointer; color: var(--text-secondary); font-family: var(--font); font-size: 13px; }
.chat-list button:hover, .chat-list li.active button { background: var(--bg-muted); color: var(--text); }
.chat-list .chat-item-title { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-list .chat-item-meta { display: block; font-size: 11px; color: var(--text-muted); }
.chat-list .chat-item-terminal .chat-item-meta { font-family: var(--mono); }
.chat-key-info { margin-top: auto; font-size: 12px; color: var(--text-muted); }
.chat-key-info summary { cursor: pointer; }
.chat-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--border-subtle); margin-right: 6px; }
.chat-dot.on { background: #22c55e; }

.chat-pane { border: 1px solid var(--border); display: flex; flex-direction: column; min-height: 70vh; }
.chat-new-form { padding: 18px; max-width: 640px; }
.chat-new-form fieldset { border: 1px solid var(--border); margin: 14px 0 0; padding: 8px 12px 12px; }
.chat-new-form legend { font-size: 12px; color: var(--text-muted); padding: 0 4px; }
.chat-new-form details { margin-top: 14px; }
.chat-new-form details summary { cursor: pointer; font-size: 13px; color: var(--text-secondary); }
.chat-check { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text); margin-top: 8px; }
.chat-check input { width: auto; }
.chat-list li > button:first-child { flex: 1; min-width: 0; width: auto; }
.chat-end, .chat-terminal { align-self: center; margin-right: 4px; padding: 4px 8px; }
.chat-row-end { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; padding: 6px 4px; font-size: 12px; color: var(--text-secondary); }
.chat-row-end .chat-btn { padding: 4px 8px; }
.chat-actions { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }
.chat-view { display: flex; flex-direction: column; flex: 1; min-height: 0; }
.chat-view-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.chat-view-head .chat-actions { margin-top: 0; }
.chat-title { font-size: 15px; color: var(--text); font-weight: 600; }
.chat-transcript { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 10px; max-height: 65vh; }
.chat-msg { white-space: pre-wrap; word-wrap: break-word; font-size: 14px; line-height: 1.5; padding: 8px 12px; max-width: 92%; }
.chat-msg.user { align-self: flex-end; background: var(--bg-muted); border: 1px solid var(--border); color: var(--text); }
.chat-msg.assistant { align-self: flex-start; color: var(--text); }
.chat-msg.error { align-self: flex-start; border: 1px solid #b91c1c; color: var(--text); }
.chat-msg.note { align-self: center; font-size: 12px; color: var(--text-muted); padding: 2px 8px; }
.chat-screen { align-self: stretch; font-family: var(--mono); font-size: 12px; white-space: pre-wrap; word-break: break-word; background: var(--bg-muted); border: 1px solid var(--border); padding: 8px 10px; max-height: 420px; overflow: auto; color: var(--text-secondary); }
.chat-tool { align-self: flex-start; max-width: 92%; border: 1px solid var(--border); font-size: 13px; }
.chat-tool summary { cursor: pointer; padding: 6px 10px; color: var(--text-secondary); font-family: var(--mono); font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-tool.failed summary { color: #ef4444; }
.chat-tool pre { font-family: var(--mono); font-size: 12px; white-space: pre-wrap; word-break: break-word; padding: 8px 10px; border-top: 1px solid var(--border); max-height: 320px; overflow: auto; color: var(--text-secondary); }
.chat-approval { align-self: flex-start; border: 1px solid var(--text-secondary); padding: 10px 12px; font-size: 13px; max-width: 92%; }
.chat-approval pre { font-family: var(--mono); font-size: 12px; white-space: pre-wrap; word-break: break-word; margin: 6px 0; max-height: 240px; overflow: auto; }
.chat-composer { display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--border); align-items: flex-end; }
.chat-composer textarea { flex: 1; }
.chat-error { margin: 8px 16px; font-size: 13px; color: #ef4444; white-space: pre-wrap; }
.chat-new-form .chat-error { margin: 8px 0; }
.chat-empty { flex: 1; display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 14px; }
.chat-ended { align-self: stretch; font-size: 12px; color: var(--text-muted); border-top: 1px solid var(--border, #333); padding-top: 6px; }
.chat-ended-detail { white-space: pre-wrap; word-break: break-word; font-size: 11px; margin: 4px 0 0; max-height: 14em; overflow: auto; }
.chat-working { align-self: flex-start; font-size: 12px; color: var(--text-muted); }
.chat-confirm { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; padding: 10px 16px; border-bottom: 1px solid var(--border); background: var(--bg-subtle); font-size: 13px; color: var(--text); }
.chat-confirm span { flex: 1; min-width: 200px; }
.chat-danger { border-color: #b91c1c; color: #ef4444; }
.chat-danger:hover:not(:disabled) { border-color: #ef4444; color: #ef4444; }

/* Co-browsing (#158) */
.chat-pane.with-browser { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); }
.chat-pane.with-browser > .cb { grid-column: 1; grid-row: 1 / span 3; border-right: 1px solid var(--border); }
.chat-pane.with-browser > :not(.cb) { grid-column: 2; }
@media (max-width: 1100px) { .chat-pane.with-browser { display: flex; flex-direction: column; } .chat-pane.with-browser > .cb { border-right: 0; border-bottom: 1px solid var(--border); } }
.cb { display: flex; flex-direction: column; gap: 8px; padding: 12px 16px; min-width: 0; }
.cb-head, .cb-bar, .cb-typer { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.cb-grow { flex: 1; }
.cb-url { flex: 1; min-width: 160px; width: auto; }
.cb-tabs { width: auto; max-width: 220px; }
.cb-frame { width: 100%; height: auto; border: 1px solid var(--border); background: var(--bg-muted); cursor: crosshair; outline: none; }
.cb-frame:focus { border-color: var(--text-secondary); }
.cb-typer .chat-input { flex: 1; width: auto; }
.cb-dialog-input { width: 200px; }
.cb-hint { font-size: 12px; }
.cb-control { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; font-size: 13px; color: var(--text); padding: 6px 10px; border: 1px solid var(--border); background: var(--bg-subtle); }
.cb-control.user { border-color: #16a34a; }
.cb-control.agent { border-color: #d97706; }
.cb-control-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted); }
.cb-control.user .cb-control-dot { background: #16a34a; }
.cb-control.agent .cb-control-dot { background: #d97706; }