body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;padding:0;background-color:#f0f2f5;color:#333}header{background-color:#fff;padding:1rem 2rem;box-shadow:0 2px 4px #0000001a;display:flex;justify-content:center;align-items:center;position:relative}.lang-toggle{position:absolute;right:2rem;padding:.3rem .8rem;border:1px solid #007bff;border-radius:4px;background:transparent;color:#007bff;cursor:pointer;font-weight:600;font-size:.85rem}.lang-toggle:hover{background-color:#007bff;color:#fff}.logo-link{display:flex;align-items:center;gap:.6rem;text-decoration:none}.logo{flex-shrink:0}h1{margin:0;color:#007bff}main{padding:2rem}footer{text-align:center;padding:1.5rem;color:#888;font-size:.85rem}footer a{color:#888;text-decoration:none}.footer-sep{color:#ccc;margin:0 .5rem}footer a:hover{color:#007bff;text-decoration:underline}