:root {
    --primary: #4f46e5;
    --primary-light: #818cf8;
    --primary-dark: #3730a3;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #06b6d4;
    --bg-body: #0f172a;
    --bg-surface: #1e293b;
    --bg-card: rgba(30, 41, 59, 0.8);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-bg-hover: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.2);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(255, 255, 255, 0.08);
    --sidebar-width: 260px;
    --header-height: 60px;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
}

.glass-card-sm {
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 20px;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border: none;
    font-weight: 500;
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* Form controls dark theme */
.form-control, .form-select {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: var(--transition);
}
.form-control:focus, .form-select:focus {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-light);
    color: var(--text-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}
.form-control::placeholder { color: var(--text-muted); }
.form-label { color: var(--text-secondary); font-weight: 500; font-size: 0.85rem; }

/* Modal styling */
.modal-content.glass-card {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
}
.modal-header { border-bottom: 1px solid var(--border-color); }
.modal-footer { border-top: 1px solid var(--border-color); }
.modal-title { color: var(--text-primary); }
.btn-close { filter: invert(1) grayscale(100%) brightness(200%); }

/* Badges */
.badge { font-weight: 500; font-size: 0.75rem; padding: 4px 8px; border-radius: 6px; }
.badge-status-active { background: rgba(34, 197, 94, 0.15); color: #4ade80; }
.badge-status-inactive { background: rgba(148, 163, 184, 0.15); color: #94a3b8; }
.badge-status-draft { background: rgba(245, 158, 11, 0.15); color: #fbbf24; }
.badge-status-approved { background: rgba(34, 197, 94, 0.15); color: #4ade80; }
.badge-status-effective { background: rgba(6, 182, 212, 0.15); color: #22d3ee; }
.badge-status-obsolete { background: rgba(148, 163, 184, 0.15); color: #94a3b8; }

/* Page header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}
.page-header h4 {
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

/* KPI Cards */
.kpi-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    transition: var(--transition);
}
.kpi-card:hover {
    background: var(--glass-bg-hover);
    transform: translateY(-2px);
}
.kpi-card .kpi-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 12px;
}
.kpi-card .kpi-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
}
.kpi-card .kpi-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Dropdown */
.dropdown-menu {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    padding: 8px;
}
.dropdown-item {
    color: var(--text-primary);
    border-radius: 8px;
    padding: 8px 12px;
    transition: var(--transition);
}
.dropdown-item:hover { background: var(--glass-bg-hover); color: var(--text-primary); }
.dropdown-divider { border-color: var(--border-color); }

/* Pagination dark theme */
.pagination .page-link {
    background: var(--glass-bg);
    border-color: var(--border-color);
    color: var(--text-secondary);
}
.pagination .page-link:hover {
    background: var(--glass-bg-hover);
    color: var(--text-primary);
}
.pagination .page-item.active .page-link {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}
.pagination .page-item.disabled .page-link {
    background: transparent;
    color: var(--text-muted);
}

/* Operation list (Routing modal) */
.operation-list-container {
    max-height: 300px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 4px 0;
}

.operation-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    transition: var(--transition);
}
.operation-row:hover {
    background: var(--glass-bg-hover);
}

.operation-row-seq {
    width: 26px;
    height: 26px;
    min-width: 26px;
    border-radius: 50%;
    background: rgba(79, 70, 229, 0.2);
    color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.operation-row .op-select {
    flex: 1;
    min-width: 0;
}

.operation-cycle-time {
    min-width: 60px;
    text-align: right;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--info);
    white-space: nowrap;
}

.operation-row .op-remove {
    padding: 2px 6px;
    line-height: 1;
}

.operation-total-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
    padding: 10px 14px;
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid rgba(79, 70, 229, 0.2);
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Time Study edit tables */
.ts-edit-table {
    margin-bottom: 8px;
}
.ts-edit-table thead th {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 600;
    border-bottom-color: var(--border-color);
    padding: 6px 8px;
}
.ts-edit-table tbody td {
    border-bottom-color: var(--border-color);
    padding: 4px 8px;
    vertical-align: middle;
}
.ts-edit-table .form-control,
.ts-edit-table .form-select {
    font-size: 0.85rem;
}

.page-loading {
    display: flex;
    justify-content: center;
    padding: 60px;
}
.page-loading.d-none { display: none !important; }