* { box-sizing: border-box; margin: 0; padding: 0; }

        /* ── Dark theme (default) ───────────────────────────────── */
        :root {
            --bg:           #1a1228;
            --surface:      #221840;
            --border:       #3a2852;
            --user-bg:      #5c1528;
            --user-border:  #7a1f36;
            --inara-bg:     #261d42;
            --inara-border: #3d2a55;
            --accent:       #c4935a;
            --text:         #e8e0f0;
            --muted:        #9080a8;
            --error-bg:     #3b0f0f;
            --error-border: #7f1d1d;
            --error-text:   #fca5a5;
            --shadow:       rgba(0,0,0,0.55);
            --modal-overlay: rgba(0,0,0,0.72);
            --code-bg:      rgba(0,0,0,0.30);
            --pre-bg:       rgba(0,0,0,0.35);
            --success:      #6abf6a;
            --success-dim:  #2a4a2a;
        }

        /* ── Light theme ─────────────────────────────────────────── */
        @media (prefers-color-scheme: light) {
            :root:not([data-theme="dark"]) {
                --bg:           #f2eef9;
                --surface:      #e8e1f4;
                --border:       #c0afd8;
                --user-bg:      #f5dae2;
                --user-border:  #d890aa;
                --inara-bg:     #ede5f8;
                --inara-border: #b8a0d8;
                --accent:       #7a4818;
                --text:         #1c1030;
                --muted:        #60487a;
                --error-bg:     #fde8e8;
                --error-border: #d88888;
                --error-text:   #8b0f0f;
                --shadow:       rgba(0,0,0,0.18);
                --modal-overlay: rgba(0,0,0,0.45);
                --code-bg:      rgba(0,0,0,0.06);
                --pre-bg:       rgba(0,0,0,0.07);
                --success:      #1e6e1e;
                --success-dim:  #5aaa5a;
            }
        }

        /* Manual overrides — take precedence over system preference */
        [data-theme="dark"] {
            --bg:           #1a1228;
            --surface:      #221840;
            --border:       #3a2852;
            --user-bg:      #5c1528;
            --user-border:  #7a1f36;
            --inara-bg:     #261d42;
            --inara-border: #3d2a55;
            --accent:       #c4935a;
            --text:         #e8e0f0;
            --muted:        #9080a8;
            --error-bg:     #3b0f0f;
            --error-border: #7f1d1d;
            --error-text:   #fca5a5;
            --shadow:       rgba(0,0,0,0.55);
            --modal-overlay: rgba(0,0,0,0.72);
            --code-bg:      rgba(0,0,0,0.30);
            --pre-bg:       rgba(0,0,0,0.35);
            --success:      #6abf6a;
            --success-dim:  #2a4a2a;
        }

        [data-theme="light"] {
            --bg:           #f2eef9;
            --surface:      #e8e1f4;
            --border:       #c0afd8;
            --user-bg:      #f5dae2;
            --user-border:  #d890aa;
            --inara-bg:     #ede5f8;
            --inara-border: #b8a0d8;
            --accent:       #7a4818;
            --text:         #1c1030;
            --muted:        #60487a;
            --error-bg:     #fde8e8;
            --error-border: #d88888;
            --error-text:   #8b0f0f;
            --shadow:       rgba(0,0,0,0.18);
            --modal-overlay: rgba(0,0,0,0.45);
            --code-bg:      rgba(0,0,0,0.06);
            --pre-bg:       rgba(0,0,0,0.07);
            --success:      #1e6e1e;
            --success-dim:  #5aaa5a;
        }

        body {
            font-family: system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            height: 100vh;
            display: flex;
            flex-direction: column;
        }

        header {
            padding: 12px 20px;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 12px;
            position: relative;
        }

        .header-emoji {
            font-size: 1.6rem;
            display: inline-block;
        }

        @keyframes shimmer {
            0%   { transform: scale(1)    rotate(0deg);   opacity: 1;   }
            25%  { transform: scale(1.2)  rotate(-12deg); opacity: 0.7; }
            75%  { transform: scale(1.2)  rotate(12deg);  opacity: 0.7; }
            100% { transform: scale(1)    rotate(0deg);   opacity: 1;   }
        }

        .header-emoji.processing { animation: shimmer 0.75s ease-in-out infinite; }

        header .name     { font-size: 1.1rem; font-weight: 600; color: var(--accent); }
        header .subtitle { font-size: 0.78rem; color: var(--muted); }

        .hdr-btn {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 6px;
            color: var(--muted);
            font-size: 0.75rem;
            padding: 5px 10px;
            cursor: pointer;
            transition: border-color 0.15s, color 0.15s;
        }

        .hdr-btn:hover { border-color: var(--muted); color: var(--text); }

        #sessions-btn { margin-left: auto; }

        /* Sessions panel */
        #sessions-panel {
            display: none;
            position: absolute;
            top: calc(100% + 4px);
            right: 12px;
            width: min(300px, calc(100vw - 24px));
            max-height: 340px;
            overflow-y: auto;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 8px;
            z-index: 100;
            box-shadow: 0 8px 24px var(--shadow);
        }

        #sessions-panel.open { display: block; }

        .session-item {
            padding: 10px 14px;
            cursor: pointer;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 8px;
        }

        .session-item:last-child { border-bottom: none; }
        .session-item:hover { background: var(--bg); }
        .session-item.new { color: var(--accent); justify-content: center; }

        .session-delete-btn {
            background: none;
            border: none;
            color: var(--muted);
            font-size: 1.1rem;
            line-height: 1;
            padding: 2px 4px;
            cursor: pointer;
            border-radius: 3px;
            flex-shrink: 0;
            margin-left: 4px;
            opacity: 0;
            transition: opacity 0.15s, color 0.15s;
        }
        .session-item:hover .session-delete-btn { opacity: 1; }
        .session-delete-btn:hover { color: #e06c75; }

        .session-id {
            font-family: monospace;
            font-size: 0.85rem;
            color: var(--text);
        }

        .session-meta {
            font-size: 0.72rem;
            color: var(--muted);
            white-space: nowrap;
            text-align: right;
            flex-shrink: 0;
        }

        /* Messages */
        #messages {
            flex: 1;
            overflow-y: auto;
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .message {
            max-width: 75%;
            padding: 10px 14px;
            border-radius: 12px;
            line-height: 1.55;
            word-wrap: break-word;
            font-size: 0.95rem;
        }

        .message.user { white-space: pre-wrap; }

        .message.user {
            align-self: flex-end;
            background: var(--user-bg);
            border: 1px solid var(--user-border);
            border-bottom-right-radius: 3px;
        }

        .message.assistant {
            align-self: flex-start;
            background: var(--inara-bg);
            border: 1px solid var(--inara-border);
            border-bottom-left-radius: 3px;
        }

        /* Markdown rendering inside assistant messages */
        .message.assistant p            { margin: 0 0 0.6em; }
        .message.assistant p:last-child { margin-bottom: 0; }
        .message.assistant ul,
        .message.assistant ol           { margin: 0.4em 0 0.6em 1.4em; padding: 0; }
        .message.assistant li           { margin-bottom: 0.2em; }
        .message.assistant h1,
        .message.assistant h2,
        .message.assistant h3           { margin: 0.8em 0 0.3em; font-weight: 600;
                                          color: var(--accent); line-height: 1.3; }
        .message.assistant h1           { font-size: 1.1em; }
        .message.assistant h2           { font-size: 1.0em; }
        .message.assistant h3           { font-size: 0.95em; }
        .message.assistant strong       { color: var(--text); font-weight: 600; }
        .message.assistant em           { color: var(--accent); font-style: italic; }
        .message.assistant a            { color: var(--accent); text-decoration: underline; }
        .message.assistant hr           { border: none; border-top: 1px solid var(--border);
                                          margin: 0.8em 0; }
        .message.assistant blockquote   {
            border-left: 3px solid var(--border);
            margin: 0.5em 0;
            padding: 0.2em 0.8em;
            color: var(--muted);
        }
        .message.assistant code {
            font-family: 'Courier New', monospace;
            font-size: 0.88em;
            background: var(--code-bg);
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 0.1em 0.35em;
        }
        .message.assistant pre {
            background: var(--pre-bg);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 10px 12px;
            overflow-x: auto;
            margin: 0.5em 0;
        }
        .message.assistant pre code {
            background: none;
            border: none;
            padding: 0;
            font-size: 0.85em;
        }

        .message.system {
            align-self: center;
            font-size: 0.72rem;
            color: var(--muted);
            background: none;
            padding: 2px 0;
        }

        .message.error {
            align-self: flex-start;
            background: var(--error-bg);
            border: 1px solid var(--error-border);
            color: var(--error-text);
            border-bottom-left-radius: 3px;
        }

        .message.thinking { color: var(--muted); font-style: italic; }

        /* Copy button */
        .message.assistant { position: relative; }

        .copy-btn {
            position: absolute;
            top: 7px;
            right: 8px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 4px;
            color: var(--muted);
            font-size: 0.7rem;
            padding: 2px 7px;
            cursor: pointer;
            opacity: 0;
            transition: opacity 0.15s, color 0.15s, border-color 0.15s;
        }

        .message.assistant:hover .copy-btn { opacity: 1; }
        .copy-btn:hover  { color: var(--text); border-color: var(--muted); }
        .copy-btn.copied { color: var(--success); border-color: var(--success-dim); }

        /* Note messages */
        .message.note-private {
            align-self: flex-end;
            background: rgba(100, 70, 5, 0.15);
            border: 1px dashed rgba(180, 130, 40, 0.45);
            border-bottom-right-radius: 3px;
            font-size: 0.9rem;
            max-width: 70%;
        }

        .message.note-public {
            align-self: flex-end;
            background: rgba(5, 70, 70, 0.15);
            border: 1px dashed rgba(40, 170, 150, 0.45);
            border-bottom-right-radius: 3px;
            font-size: 0.9rem;
            max-width: 70%;
        }

        .note-label {
            display: block;
            font-size: 0.62rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 5px;
            opacity: 0.65;
        }

        .message.note-private .note-label   { color: #c9a84c; }
        .message.note-public  .note-label   { color: #4abfb0; }
        .message.note-private .note-content { color: #c9a84c; white-space: pre-wrap; }
        .message.note-public  .note-content { color: #4abfb0; white-space: pre-wrap; }

        /* ── Input area ────────────────────────────────────────────── */
        #input-area {
            padding: 14px 20px;
            background: var(--surface);
            border-top: 1px solid var(--border);
            display: flex;
            gap: 10px;
            align-items: flex-end;
        }

        #input {
            flex: 1;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text);
            padding: 10px 14px;
            font-size: 0.95rem;
            font-family: inherit;
            resize: none;
            line-height: 1.4;
            overflow-y: auto;
            transition: border-color 0.2s;
        }

        #input:focus { outline: none; border-color: var(--muted); }

        #input.note-mode         { border-color: rgba(180, 130, 40, 0.55); }
        #input.note-mode:focus   { border-color: rgba(180, 130, 40, 0.85); }
        #input.note-mode.public  { border-color: rgba(40, 170, 150, 0.55); }
        #input.note-mode.public:focus { border-color: rgba(40, 170, 150, 0.85); }

        /* Right column — all controls stacked, fixed width */
        #right-col {
            display: flex;
            flex-direction: column;
            align-items: stretch;
            gap: 4px;
            flex-shrink: 0;
            width: 88px;
        }

        /* Semi-hidden controls: height selector row */
        #height-row {
            display: none;       /* shown by JS when content > 3 lines */
            align-items: center;
            gap: 4px;
        }

        #height-row span {
            font-size: 0.65rem;
            color: var(--muted);
            flex-shrink: 0;
        }

        #height-sel {
            flex: 1;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 5px;
            color: var(--muted);
            font-size: 0.65rem;
            padding: 2px 4px;
            cursor: pointer;
            min-width: 0;
        }

        #height-sel:focus { outline: none; border-color: var(--muted); }

        /* Semi-hidden: enter-mode toggle */
        #enter-toggle {
            display: none;       /* shown by JS when content > 3 lines */
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 5px;
            color: var(--muted);
            font-size: 0.68rem;
            padding: 3px 6px;
            cursor: pointer;
            text-align: center;
            transition: border-color 0.15s, color 0.15s;
        }

        #enter-toggle:hover { border-color: var(--muted); color: var(--text); }

        /* Note type toggle — only visible in note mode */
        #note-type-btn {
            display: none;
            background: var(--bg);
            border: 1px solid rgba(180, 130, 40, 0.4);
            border-radius: 5px;
            color: rgba(180, 130, 40, 0.85);
            font-size: 0.68rem;
            padding: 3px 6px;
            cursor: pointer;
            text-align: center;
            transition: opacity 0.15s;
        }

        #note-type-btn.public {
            border-color: rgba(40, 170, 150, 0.4);
            color: rgba(40, 170, 150, 0.85);
        }

        #note-type-btn:hover { opacity: 0.75; }

        /* Note button */
        #note-btn {
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--muted);
            border-radius: 8px;
            padding: 8px 0;
            cursor: pointer;
            font-size: 0.85rem;
            text-align: center;
            transition: border-color 0.15s, color 0.15s;
        }

        #note-btn:hover          { border-color: var(--muted); color: var(--text); }
        #note-btn.active         { border-color: rgba(180, 130, 40, 0.6); color: #c9a84c; }
        #note-btn.active.public  { border-color: rgba(40, 170, 150, 0.6); color: #4abfb0; }

        /* Send button */
        #send {
            background: var(--user-bg);
            border: 1px solid var(--user-border);
            color: var(--text);
            border-radius: 8px;
            padding: 10px 0;
            cursor: pointer;
            font-size: 0.9rem;
            text-align: center;
            transition: background 0.15s;
        }

        #send:hover    { background: var(--user-border); }
        #send:disabled { background: var(--surface); color: var(--muted);
                         border-color: var(--border); cursor: not-allowed; }

        /* Stop button */
        #stop {
            display: none;
            background: var(--error-bg);
            border: 1px solid var(--error-border);
            color: var(--error-text);
            border-radius: 8px;
            padding: 10px 0;
            cursor: pointer;
            font-size: 0.9rem;
            text-align: center;
            transition: background 0.15s;
        }

        #stop:hover { background: #5c1a1a; }

        #session-id {
            font-size: 0.7rem;
            color: var(--border);
            padding: 0 20px 6px;
            background: var(--surface);
        }

        /* ── Message wrappers (edit/delete controls) ──────────────── */
        .msg-wrapper {
            display: flex;
            flex-direction: column;
            max-width: 75%;
        }

        .msg-wrapper.user      { align-self: flex-end; }
        .msg-wrapper.assistant { align-self: flex-start; }

        /* Inner message fills wrapper width */
        .msg-wrapper .message.user,
        .msg-wrapper .message.assistant {
            align-self: stretch;
            max-width: none;
        }

        .msg-actions {
            display: flex;
            gap: 4px;
            opacity: 0;
            transition: opacity 0.15s;
            padding: 2px 2px 0;
        }

        .msg-wrapper.user .msg-actions      { justify-content: flex-end; }
        .msg-wrapper.assistant .msg-actions { justify-content: flex-start; }
        .msg-wrapper:hover .msg-actions     { opacity: 1; }

        .msg-act-btn {
            background: none;
            border: 1px solid var(--border);
            border-radius: 4px;
            color: var(--muted);
            font-size: 0.65rem;
            padding: 1px 6px;
            cursor: pointer;
            transition: color 0.15s, border-color 0.15s;
        }

        .msg-act-btn:hover     { color: var(--text); border-color: var(--muted); }
        .msg-act-btn.del:hover { color: var(--error-text); border-color: var(--error-border); }

        /* Inline edit */
        .edit-textarea {
            width: 100%;
            background: var(--bg);
            border: 1px solid var(--muted);
            border-radius: 6px;
            color: var(--text);
            padding: 6px 10px;
            font-size: 0.9rem;
            font-family: inherit;
            resize: vertical;
            line-height: 1.4;
        }

        .edit-textarea:focus { outline: none; border-color: var(--accent); }

        .edit-btns {
            display: flex;
            gap: 6px;
            margin-top: 6px;
            justify-content: flex-end;
        }

        .edit-save-btn, .edit-cancel-btn {
            background: none;
            border: 1px solid var(--border);
            border-radius: 4px;
            color: var(--muted);
            font-size: 0.75rem;
            padding: 3px 10px;
            cursor: pointer;
            transition: color 0.15s, border-color 0.15s, background 0.15s;
        }

        .edit-save-btn   { border-color: var(--inara-border); color: var(--accent); }
        .edit-save-btn:hover   { background: var(--inara-bg); }
        .edit-cancel-btn:hover { color: var(--text); border-color: var(--muted); }

        /* ── File editor modal ───────────────────────────────────── */
        #file-modal {
            display: none;
            position: fixed;
            inset: 0;
            background: var(--modal-overlay);
            z-index: 200;
            align-items: center;
            justify-content: center;
        }
        #file-modal.open { display: flex; }

        #file-modal-inner {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 10px;
            width: min(860px, 96vw);
            height: min(82vh, 800px);
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        #file-modal-header {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            border-bottom: 1px solid var(--border);
            background: var(--bg);
            flex-shrink: 0;
        }

        #file-modal-header select {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 5px;
            color: var(--text);
            font-size: 0.85rem;
            padding: 4px 8px;
            cursor: pointer;
        }

        #file-modal-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent);
            flex: 1;
        }

        .fm-btn {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 5px;
            color: var(--muted);
            font-size: 0.75rem;
            padding: 4px 10px;
            cursor: pointer;
            transition: color 0.15s, border-color 0.15s;
        }
        .fm-btn:hover { color: var(--text); border-color: var(--muted); }
        .fm-btn.active { color: var(--accent); border-color: var(--accent); }
        .fm-btn.save   { color: var(--accent); border-color: var(--inara-border); }
        .fm-btn.save:hover { background: var(--inara-bg); }
        #file-saved-msg {
            font-size: 0.75rem;
            color: #6abf6a;
            opacity: 0;
            transition: opacity 0.3s;
        }
        #file-saved-msg.show { opacity: 1; }

        #file-modal-body {
            flex: 1;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }

        #file-editor {
            flex: 1;
            width: 100%;
            background: var(--bg);
            color: var(--text);
            border: none;
            outline: none;
            padding: 16px;
            font-family: 'Courier New', monospace;
            font-size: 0.85rem;
            line-height: 1.55;
            resize: none;
            display: block;
        }

        #file-preview {
            flex: 1;
            overflow-y: auto;
            padding: 16px 20px;
            display: none;
            line-height: 1.6;
        }

        #file-preview.active { display: block; }
        #file-editor.hidden  { display: none; }

        /* Talk activity badge on Sessions button */
        #sessions-btn.talk-badge::after {
            content: '●';
            color: #7cb9e8;
            margin-left: 5px;
            font-size: 0.55rem;
            vertical-align: middle;
        }

        /* ── Context panel ───────────────────────────────────────── */
        #ctx-panel {
            display: none;
            position: absolute;
            top: calc(100% + 4px);
            right: 12px;
            width: min(280px, calc(100vw - 24px));
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 8px;
            z-index: 100;
            box-shadow: 0 8px 24px var(--shadow);
            overflow: hidden;
        }
        #ctx-panel.open { display: block; }

        .ctx-section {
            padding: 10px 14px;
            border-bottom: 1px solid var(--border);
        }
        .ctx-section:last-child { border-bottom: none; }

        .ctx-section-title {
            font-size: 0.65rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--muted);
            margin-bottom: 8px;
        }

        .ctx-row {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }

        .ctx-btn {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 4px;
            color: var(--muted);
            font-size: 0.73rem;
            padding: 4px 10px;
            cursor: pointer;
            transition: color 0.15s, border-color 0.15s, background 0.15s;
        }
        .ctx-btn:hover  { color: var(--text); border-color: var(--muted); }
        .ctx-btn.active { color: var(--accent); border-color: var(--accent); }
        .ctx-btn.mem-on { color: var(--success); border-color: var(--success-dim); }

        #ctx-distill-status {
            margin-top: 6px;
            font-size: 0.68rem;
            color: var(--success);
            min-height: 1em;
            opacity: 0;
            transition: opacity 0.3s;
        }
        #ctx-distill-status.show { opacity: 1; }
        #ctx-distill-status.err  { color: var(--error-text); }

        #ctx-schedule {
            margin-top: 6px;
            font-size: 0.66rem;
            color: var(--muted);
            line-height: 1.7;
            font-family: 'Courier New', monospace;
        }

        /* Ctx header button — shows current tier as a dim superscript */
        #ctx-open-btn .tier-badge {
            font-size: 0.6em;
            opacity: 0.7;
            margin-left: 2px;
            vertical-align: super;
        }

        /* ── Help modal ──────────────────────────────────────────── */
        #help-modal {
            display: none;
            position: fixed;
            inset: 0;
            background: var(--modal-overlay);
            z-index: 200;
            align-items: center;
            justify-content: center;
        }
        #help-modal.open { display: flex; }

        #help-modal-inner {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 10px;
            width: min(780px, 96vw);
            height: min(85vh, 860px);
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        #help-modal-header {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            border-bottom: 1px solid var(--border);
            background: var(--bg);
            flex-shrink: 0;
        }

        #help-modal-header h2 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--accent);
            flex: 1;
            margin: 0;
        }

        #help-modal-body {
            flex: 1;
            overflow-y: auto;
            padding: 20px 24px;
            line-height: 1.65;
            font-size: 0.92rem;
        }

        /* Markdown rendering shared by file-preview and help-modal-body */
        #file-preview, #help-modal-body {
            color: var(--text);
        }
        #file-preview p, #help-modal-body p            { margin: 0 0 0.7em; }
        #file-preview p:last-child,
        #help-modal-body p:last-child                  { margin-bottom: 0; }
        #file-preview ul, #file-preview ol,
        #help-modal-body ul, #help-modal-body ol       { margin: 0.4em 0 0.7em 1.5em; }
        #file-preview li, #help-modal-body li          { margin-bottom: 0.25em; }
        #file-preview h1, #file-preview h2, #file-preview h3,
        #help-modal-body h1, #help-modal-body h2,
        #help-modal-body h3 {
            margin: 1em 0 0.4em;
            font-weight: 600;
            color: var(--accent);
            line-height: 1.3;
        }
        #file-preview h1, #help-modal-body h1  { font-size: 1.15em; }
        #file-preview h2, #help-modal-body h2  { font-size: 1.05em; }
        #file-preview h3, #help-modal-body h3  { font-size: 0.95em; }
        #file-preview strong, #help-modal-body strong  { color: var(--text); font-weight: 600; }
        #file-preview em, #help-modal-body em          { color: var(--accent); font-style: italic; }
        #file-preview a, #help-modal-body a            { color: var(--accent); text-decoration: underline; }
        #file-preview hr, #help-modal-body hr          {
            border: none;
            border-top: 1px solid var(--border);
            margin: 0.9em 0;
        }
        #file-preview blockquote, #help-modal-body blockquote {
            border-left: 3px solid var(--border);
            margin: 0.5em 0;
            padding: 0.2em 0.8em;
            color: var(--muted);
        }
        #file-preview code, #help-modal-body code {
            font-family: 'Courier New', monospace;
            font-size: 0.88em;
            background: var(--code-bg);
            border: 1px solid var(--border);
            border-radius: 4px;
            padding: 0.1em 0.35em;
        }
        #file-preview pre, #help-modal-body pre {
            background: var(--pre-bg);
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 10px 12px;
            overflow-x: auto;
            margin: 0.5em 0;
        }
        #file-preview pre code, #help-modal-body pre code {
            background: none;
            border: none;
            padding: 0;
            font-size: 0.85em;
        }
        #file-preview table, #help-modal-body table {
            border-collapse: collapse;
            width: 100%;
            margin: 0.6em 0;
            font-size: 0.9em;
        }
        #file-preview th, #file-preview td,
        #help-modal-body th, #help-modal-body td {
            border: 1px solid var(--border);
            padding: 5px 10px;
            text-align: left;
        }
        #file-preview th, #help-modal-body th {
            background: var(--bg);
            color: var(--accent);
            font-weight: 600;
        }

        /* ── Help modal collapsible sections ────────────────────── */
        #help-modal-body details {
            border-bottom: 1px solid var(--border);
        }
        #help-modal-body details:last-of-type { border-bottom: none; }

        #help-modal-body summary {
            cursor: pointer;
            padding: 10px 4px;
            font-size: 1.0em;
            font-weight: 600;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
            user-select: none;
            list-style: none;
        }
        #help-modal-body summary::-webkit-details-marker { display: none; }

        #help-modal-body summary::before {
            content: '▶';
            font-size: 0.6em;
            opacity: 0.55;
            transition: transform 0.15s;
            flex-shrink: 0;
        }
        #help-modal-body details[open] > summary::before {
            transform: rotate(90deg);
        }
        #help-modal-body summary:hover { color: var(--text); }

        /* Content inside a details block gets a little left indent */
        #help-modal-body details > *:not(summary) {
            padding-left: 12px;
        }

        /* ── Auth warning banner ─────────────────────────────────── */
        #auth-banner {
            display: none;
            align-items: center;
            gap: 10px;
            padding: 8px 20px;
            background: rgba(160, 100, 0, 0.18);
            border-bottom: 1px solid rgba(200, 140, 20, 0.45);
            font-size: 0.82rem;
            color: #c9a84c;
        }

        #auth-banner.show { display: flex; }
        #auth-banner.expired {
            background: rgba(120, 20, 20, 0.25);
            border-color: rgba(200, 60, 60, 0.45);
            color: var(--error-text);
        }

        #auth-banner-text { flex: 1; display: flex; flex-direction: column; gap: 2px; }
        #auth-banner-msg  { font-weight: 500; }
        #auth-banner-hint {
            font-size: 0.76rem;
            opacity: 0.8;
        }
        #auth-banner-hint code {
            font-family: 'Courier New', monospace;
            background: rgba(0,0,0,0.2);
            border-radius: 3px;
            padding: 0 4px;
        }

        #auth-banner-close {
            background: none;
            border: 1px solid currentColor;
            border-radius: 4px;
            color: inherit;
            font-size: 0.7rem;
            padding: 2px 7px;
            cursor: pointer;
            opacity: 0.7;
            flex-shrink: 0;
        }

        #auth-banner-close:hover { opacity: 1; }

        /* ── Mobile responsive ───────────────────────────────────── */
        @media (max-width: 520px) {
            header { padding: 8px 12px; gap: 8px; }
            header .subtitle { display: none; }
            #messages { padding: 12px; }

            /* dvh adjusts as soft keyboard opens/closes */
            body { height: 100dvh; }

            /* Hide session ID — saves vertical space */
            #session-id { display: none; }

            /* Input area: stack textarea above button row */
            #input-area {
                flex-direction: column;
                align-items: stretch;
                padding: 8px 12px;
                gap: 6px;
            }

            /* 16px minimum prevents iOS Safari auto-zoom on focus */
            #input { font-size: 16px; }

            /* Right col goes horizontal, full width */
            #right-col {
                flex-direction: row;
                width: 100%;
                gap: 6px;
            }

            /* Desktop-only controls — hide on mobile */
            #height-row,
            #enter-toggle { display: none !important; }

            /* Larger touch targets */
            #send, #stop { padding: 12px 0; flex: 1; font-size: 1rem; }
            #note-btn    { padding: 12px 14px; }
            #note-type-btn { padding: 6px 10px; }
        }

        /* ── Touch devices — no hover capability ─────────────────── */
        /* Always show message controls; make tap targets finger-sized */
        @media (hover: none) {
            .msg-actions {
                opacity: 1;
                padding: 4px 2px 2px;
            }

            .msg-act-btn {
                font-size: 0.78rem;
                padding: 6px 12px;
                min-height: 36px;
            }

            .session-delete-btn {
                opacity: 1;
                font-size: 1.3rem;
                padding: 4px 8px;
                min-width: 36px;
                min-height: 36px;
            }
        }

        @media (max-width: 380px) {
            header .name { font-size: 1rem; }
            .header-emoji { font-size: 1.3rem; }
            .hdr-btn { padding: 5px 8px; }
        }