:root{font-family:ui-sans-serif,system-ui,sans-serif,Segoe UI,Roboto,Helvetica,Arial;color:#172336;background:#f4f7fb;line-height:1.45}*{box-sizing:border-box}body{margin:0}a{color:#0f5e8f}a:hover{text-decoration:underline}.card{background:#fff;border:1px solid #dfe6f3;border-radius:10px;padding:1.25rem;box-shadow:0 1px 3px #15346d0f}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.55rem 1rem;border-radius:8px;border:none;font-weight:600;cursor:pointer;background:linear-gradient(165deg,#1a729c,#155a82);color:#fff}.btn.secondary{background:#eef2fb;color:#1a4766}.input{width:100%;padding:.55rem .65rem;border-radius:8px;border:1px solid #c9d6ec}.muted{color:#5b6982}.error{color:#b42318}.lk-shell{min-height:100vh;display:grid;grid-template-columns:240px 1fr}@media(max-width:900px){.lk-shell{grid-template-columns:1fr}.lk-nav{position:sticky;top:0;z-index:10;border-bottom:1px solid #dfe6f3}}