:root{--bg: #eef2f6;--surface: #ffffff;--soft: #f5f7fa;--border: #dde3ea;--text: #1b2733;--muted: #627080;--header: #0f3557;--accent: #1f6fb2;--accent-soft: #e2eef8}@media (prefers-color-scheme: dark){:root{--bg: #0d1520;--surface: #141f2c;--soft: #1a2736;--border: #2a394a;--text: #e4ebf2;--muted: #93a3b4;--header: #0b2540;--accent: #4a9be0;--accent-soft: #1d3550}}html,body{margin:0;height:100%;background:var(--bg);color:var(--text);font-family:Segoe UI,system-ui,-apple-system,Roboto,Noto Sans Arabic,Tahoma,sans-serif}*{box-sizing:border-box}