:root{--sidebar:#172033;--accent:#2563eb}body{font-family:"Segoe UI",Tahoma,sans-serif}.login-card{width:100%;max-width:420px;border:0}.brand-icon{width:62px;height:62px;border-radius:18px;background:linear-gradient(135deg,#2563eb,#06b6d4);color:#fff;display:grid;place-items:center;font-weight:700;font-size:1.25rem;margin:auto}.sidebar{width:250px;min-height:100vh;background:var(--sidebar);position:fixed;color:#fff}.sidebar .nav-link{color:#cbd5e1;border-radius:.5rem;margin:.15rem .75rem}.sidebar .nav-link:hover,.sidebar .nav-link.active{background:#26334d;color:#fff}.main{margin-left:250px;min-height:100vh}.stat-card{border:0;border-left:4px solid var(--accent)}.table td,.table th{vertical-align:middle}.topic{font-family:Consolas,monospace}@media(max-width:991.98px){.sidebar{position:static;width:100%;min-height:auto}.main{margin-left:0}.app-shell{display:block!important}}