:root{--bg: #0d1117;--bg-card: #161b22;--bg-input: #21262d;--bg-hover: #1f2937;--border: #30363d;--border-soft: #21262d;--text: #e6edf3;--text-muted: #8b949e;--accent: #2f81f7;--accent-soft: #1f6feb22;--green: #3fb950;--orange: #d29922;--red: #f85149;--radius: 8px;--radius-lg: 12px;font-size:15px}html[data-theme=light]{--bg: #ffffff;--bg-card: #f6f8fa;--bg-input: #f0f3f6;--bg-hover: #eaeef2;--border: #d0d7de;--border-soft: #d8dee4;--text: #1f2328;--text-muted: #636c76;--accent: #0969da;--accent-soft: #0969da1a;--green: #1a7f37;--orange: #9a6700;--red: #cf222e}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Helvetica,Arial,sans-serif;line-height:1.6;min-height:100vh}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app{max-width:980px;margin:0 auto;padding:2rem 1.25rem 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