.skip-link{z-index:100;width:1px;height:1px;position:absolute;top:auto;left:-999px;overflow:hidden}.skip-link:focus{color:#000;background:#fff;border-radius:4px;outline:2px solid #005fcc;width:auto;height:auto;padding:8px 16px;top:8px;left:8px;box-shadow:0 2px 4px #0003}.sr-only{clip:rect(0,0,0,0);border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}*,:before,:after{box-sizing:border-box}:root{--color-bg:#fff;--color-text:#333;--color-text-secondary:#666;--color-text-muted:#888;--color-border:#ccc;--color-social-bg:#dcdcdc;--color-social-hover:#bbb;--color-focus:#005fcc}.dark-theme{--color-bg:#1a1a1a;--color-text:#e0e0e0;--color-text-secondary:#b0b0b0;--color-text-muted:#999;--color-border:#444;--color-social-bg:#333;--color-social-hover:#555}@media (prefers-color-scheme:dark){:root:not(.dark-theme):not(.light-theme){--color-bg:#1a1a1a;--color-text:#e0e0e0;--color-text-secondary:#b0b0b0;--color-text-muted:#999;--color-border:#444;--color-social-bg:#333;--color-social-hover:#555}}body{background-color:var(--color-bg);color:var(--color-text);flex-direction:column;min-height:100vh;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex}a:focus,button:focus{outline:2px solid var(--color-focus);outline-offset:2px}.theme-toggle{z-index:10000;background:var(--color-social-bg);color:var(--color-text);cursor:pointer;border:none;border-radius:6px;padding:8px 14px;font-size:1rem;line-height:1;transition:background-color .2s;position:fixed;top:10px;right:10px}.theme-toggle:hover{background:var(--color-social-hover)}footer{border-top:1px solid var(--color-border);text-align:center;width:100%;margin-top:auto;padding:1.5rem 1rem;font-size:.9rem;line-height:1.4}footer ul{flex-wrap:wrap;justify-content:center;gap:1rem;margin:0;padding:0;list-style:none;display:flex}footer a{color:inherit;text-decoration:none}footer a:hover,footer a:focus{text-decoration:underline}footer p{margin-top:.75rem}@media print{.skip-link,.theme-toggle{display:none}}