:root {
    --primary: #0d6efd;
    --sidebar-width: 0px;
}
body {
    font-size: 0.9rem;
    background-color: #f8f9fa;
    min-height: 100vh;
}
.card { border-radius: 0.5rem; box-shadow: 0 1px 3px rgba(0,0,0,0.05); }
.card-header { background-color: #fff; border-bottom: 1px solid rgba(0,0,0,0.08); font-weight: 600; }
.table th { font-weight: 600; font-size: 0.8rem; text-transform: uppercase; color: #6c757d; background: #f8f9fa; }
.table td { vertical-align: middle; }
.badge { font-weight: 500; }
.btn { border-radius: 0.35rem; }
.form-control, .form-select { border-radius: 0.35rem; font-size: 0.9rem; }
.navbar { box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.navbar-brand { font-weight: 700; }
.modal-header { background: var(--primary); color: white; }
.modal-header .btn-close { filter: brightness(0) invert(1); }
.items-table input.form-control { min-width: 80px; }
.empty-state { padding: 3rem; text-align: center; color: #adb5bd; }
.empty-state i { font-size: 3rem; display: block; margin-bottom: 1rem; }
.clickable { cursor: pointer; }
.clickable:hover { background-color: #f8f9fa; }