:root{--locked: #475569;--locked-soft: #f1f5f9;--locked-line: #cbd5e1;--paper: #ffffff;--paper-ink: #1a1d21;--paper-text: #3c4149;--paper-muted: #8a8f98;--paper-line: #e4e7ec;--paper-soft: #f7f8fa;--paper-accent: #2a2a2a;--paper-accent-ink: #ffffff;--paper-accent-deep: #2a2a2a;--mark: #6b6b00;--mark-soft: #fffbcc;--mark-locked: #475569;--mark-locked-soft: #f1f5f9;--mark-locked-line: #cbd5e1}[data-theme=dark]{--locked: #cbd5e1;--locked-soft: #313b49;--locked-line: #4a5769}.mail-editor *{box-sizing:border-box}.mail-editor svg{pointer-events:none}.mail-editor{display:flex;flex-direction:column;overflow:hidden;background:var(--canvas);color:var(--ink);font:15px/1.5 system-ui,-apple-system,Segoe UI,sans-serif;text-align:left;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.mail-editor button,.mail-editor input,.mail-editor select,.mail-editor textarea{width:auto;margin:0;box-shadow:none}.mail-editor button{font:inherit;cursor:pointer;border:1px solid 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