:root{color-scheme:dark;--hb-bg:#0a0a0b;--hb-bg-elevated:#14141a;--hb-bg-card:#1a1a22;--hb-fg:#f0f0f5;--hb-fg-muted:#9a9aa6;--hb-fg-subtle:#5a5a66;--hb-border:#2a2a36;--hb-border-strong:#3a3a48;--hb-accent:#8b5cf6;--hb-accent-hover:#a378f9;--hb-success:#10b981;--hb-warning:#f59e0b;--hb-danger:#ef4444;--hb-radius-sm:4px;--hb-radius-md:8px;--hb-radius-lg:12px;--hb-font-sans:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--hb-font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,monospace}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--hb-bg);color:var(--hb-fg);font-family:var(--hb-font-sans);font-size:14px;line-height:1.5}a{color:var(--hb-accent);text-decoration:none}a:hover{color:var(--hb-accent-hover)}button{font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;background:var(--hb-bg-card);color:var(--hb-fg);border:1px solid var(--hb-border);border-radius:var(--hb-radius-sm);padding:8px 12px}