body {
    background: #f5f7fb;
    min-height: 100vh;
}

.app-shell {
    display: flex;
    min-height: calc(100vh - 56px);
}

.sidebar {
    width: 240px;
    background: #ffffff;
    border-right: 1px solid #e5e7eb;
}

.sidebar-link {
    display: block;
    padding: .7rem .8rem;
    margin-bottom: .25rem;
    border-radius: .5rem;
    color: #1f2937;
    text-decoration: none;
}

.sidebar-link:hover {
    background: #f3f4f6;
    color: #111827;
}

.main-content {
    flex: 1;
    padding: 1.5rem;
}

.login-card {
    max-width: 430px;
    margin: 7vh auto;
}

.stat-card {
    border: 0;
    box-shadow: 0 1px 4px rgba(0,0,0,.08);
}