/* Layout variations and utilities */

/* Grid system */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: -10px;
}

.col {
    flex: 1;
    min-width: 0;
    padding: 10px;
}

.col-12 { flex: 0 0 100%; }
.col-6 { flex: 0 0 50%; }
.col-4 { flex: 0 0 33.333%; }
.col-3 { flex: 0 0 25%; }

/* Spacing utilities */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mb-5 { margin-bottom: 3rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

/* Text utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-muted { color: #6c757d; }
.text-primary { color: #007bff; }
.text-success { color: #28a745; }
.text-danger { color: #dc3545; }

.text-small { font-size: 0.875rem; }
.text-large { font-size: 1.25rem; }

.font-weight-bold { font-weight: 700; }
.font-weight-normal { font-weight: 400; }
.font-weight-light { font-weight: 300; }

/* Visibility utilities */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Cards */
.card {
    background: white;
    border: 1px solid #e9ecef;
    border-radius: 8px;
    overflow: hidden;
}

.card-header {
    padding: 15px;
    border-bottom: 1px solid #e9ecef;
    background: #f8f9fa;
}

.card-body {
    padding: 15px;
}

.card-footer {
    padding: 15px;
    border-top: 1px solid #e9ecef;
    background: #f8f9fa;
}

/* Alert/Messages */
.alert {
    padding: 12px 15px;
    border-radius: 4px;
    margin-bottom: 15px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* Loading state */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0,0,0,0.1);
    border-radius: 50%;
    border-top-color: #007bff;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}

.badge-primary {
    background: #007bff;
    color: white;
}

.badge-success {
    background: #28a745;
    color: white;
}

.badge-danger {
    background: #dc3545;
    color: white;
}

.badge-warning {
    background: #ffc107;
    color: #333;
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 40px 20px;
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 15px;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 10px;
    font-size: 18px;
}

.empty-state p {
    color: #6c757d;
    margin-bottom: 20px;
}

/* Print styles */
@media print {
    .no-print {
        display: none !important;
    }

    .container {
        max-width: 100%;
    }
}