diff --git a/bcc.py b/bcc.py
index d16ce60..2b9012f 100644
--- a/bcc.py
+++ b/bcc.py
@@ -60,7 +60,10 @@ STATUS_COLORS = {"ok": GOOD, "missing": BAD, "warn": WARN, "remote": "#60a5fa",
 STATUS_GLYPH = {"ok": "●", "missing": "●", "warn": "▲", "remote": "◆", "unknown": "○"}
 
 STYLESHEET = f"""
-* {{ font-family: -apple-system, "Segoe UI", "Inter", "DejaVu Sans", sans-serif; font-size: 13px; color: {TEXT}; }}
+/* No font-family here on purpose: Qt already uses the native system UI font
+   on every platform (San Francisco / Segoe UI / desktop default). Naming
+   web-CSS aliases like -apple-system forces a costly font-alias scan. */
+* {{ font-size: 13px; color: {TEXT}; }}
 QMainWindow, QDialog {{ background: {BG}; }}
 QLabel#h1 {{ font-size: 15px; font-weight: 600; }}
 QLabel#muted {{ color: {MUTED}; }}
@@ -103,7 +106,7 @@ QLabel#sectionDisabled {{ color: {MUTED}; font-weight: 600; font-size: 12px; pad
 QLabel#placeholder {{ color: {MUTED}; padding: 12px; background: {PANEL_2}; border: 1px dashed {BORDER}; border-radius: 8px; }}
 QTableWidget#disabledTable {{ background: #202229; }}
 QTableWidget#disabledTable::item:selected {{ background: {ACCENT}; color: #1a1205; }}
-QPlainTextEdit#diag {{ font-family: "SF Mono", "Cascadia Code", "Consolas", "DejaVu Sans Mono", monospace;
+QPlainTextEdit#diag {{ font-family: "Menlo", "Cascadia Code", "Consolas", "DejaVu Sans Mono", monospace;
     font-size: 12px; background: #16181d; border: 1px solid {BORDER}; border-radius: 8px; }}
 QFrame#diagCard {{ background: transparent; border: none; }}
 QSplitter::handle {{ background: transparent; }}