:root{--bg:#0f1117;--surface:#1a1d27;--text:#e4e4e7;--text-muted:#9ca3af;--border:#2a2d3a;--accent-bg:#6366f11a;--accent-border:#6366f14d;--accent-light:#a5b4fc;--radius:6px;--radius-lg:12px}[data-theme=light]{--bg:#fff;--surface:#f8f9fa;--text:#1a1a2e;--text-muted:#6b7280;--border:#e5e7eb;--accent-bg:#6366f114;--accent-border:#6366f140;--accent-light:#6366f1}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5;transition:background .2s,color .2s}a{color:var(--accent-light);text-decoration:none}a:hover{text-decoration:underline}input,select{font-family:inherit}.theme-toggle{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;color:var(--text);padding:.4rem .6rem;font-size:1rem;transition:background .2s}.theme-toggle:hover{background:var(--accent-bg)}@media (width<=768px){header nav{display:none}}