:root{--bg: #0b1220;--card: #111b2e;--text: #e8eefc;--muted: #a9b7d6;--btn: #1b2a46;--btn2: #22365c}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial;background:var(--bg);color:var(--text)}.topbar{display:flex;justify-content:space-between;align-items:center;padding:16px 20px}.brand{font-weight:700}.container{max-width:900px;margin:40px auto;padding:0 20px}.card{background:var(--card);border-radius:16px;padding:28px}p{color:var(--muted);line-height:1.5}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{display:inline-block;padding:10px 14px;border-radius:10px;background:var(--btn);color:var(--text);text-decoration:none}.btn:hover{background:var(--btn2)}.primary{background:#2b4b8a}.primary:hover{background:#355aa5}.hidden{display:none}.lang-toggle{border:none}.lang-toggle button{background:transparent;color:var(--muted);border:1px solid #2a3b5f;padding:6px 10px;border-radius:10px;cursor:pointer}.lang-toggle button.active{color:var(--text);border-color:#4b6bb3}