.pantalla{min-height:100vh;display:flex;align-items:center;justify-content:center;background:#f4f6f8;padding:16px;box-sizing:border-box}.tarjeta{background:#fff;border-radius:12px;box-shadow:0 2px 10px #00000014;padding:32px;width:100%;max-width:380px;box-sizing:border-box}.tarjeta h1{margin:0 0 8px;font-size:22px;text-align:center}.subtitulo{color:#666;font-size:14px;text-align:center;margin:0 0 20px}label{display:block;font-size:13px;font-weight:600;margin:14px 0 6px;color:#333}input,select{width:100%;padding:10px 12px;border:1px solid #ccc;border-radius:8px;font-size:15px;box-sizing:border-box}input:focus,select:focus{outline:none;border-color:#1565c0}button.principal{width:100%;margin-top:20px;padding:12px;background:#1565c0;color:#fff;border:none;border-radius:8px;font-size:15px;font-weight:600;cursor:pointer}button.principal:disabled{opacity:.6;cursor:default}.mensaje{margin-top:16px;padding:10px 12px;border-radius:8px;font-size:14px;text-align:center}.mensaje.error{background:#fdecea;color:#b3261e}.mensaje.exito{background:#e6f4ea;color:#1e7e34}