.dashboard-layout {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 240px;
    background-color: #f8f9fa;
    padding: 1rem;
    height: 100vh;
    position: sticky;
    top: 0;
}
.main-content {
    flex: 1;
    padding: 1rem;
    background-color: #ffffff;
}
.card {
    background: #fff;
    border-radius: 0.375rem;
    box-shadow: 0 0.125rem 0.25rem rgba(0,0,0,0.05);
    margin-bottom: 1rem;
}
.card-header {
    background-color: #f1f1f1;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #e9ecef;
}
.card-body {
    padding: 1rem;
}
.table {
    width: 100%;
    border-collapse: collapse;
}
.table th, .table td {
    padding: 1rem;
    vertical-align: middle;
    border-bottom: 1px solid #dee2e6;
}
.table-hover tr:hover {
    background-color: #f5f5f5;
}
.btn {
    display: inline-block;
    font-weight: 400;
    color: #fff;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    border: none;
    border-radius: 0.25rem;
    padding: 0.375rem 0.75rem;
}
.btn-success {
    background-color: #28a745;
}
.btn-success:hover {
    background-color: #218838;
}
.btn-danger {
    background-color: #dc3545;
}
.btn-danger:hover {
    background-color: #c82333;
}
.section {
    margin-top: 2rem;
}
.section-title {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: #343a40;
}
.grid {
    display: grid;
}
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.gap-4 { gap: 1rem; }

/* Responsive */
@media (min-width: 768px) {
    .grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}