/* ============================================
   CSS Variables — Light Theme (default)
   ============================================ */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f4f6f8;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --border-color: #dee2e6;
    --border-light: #e9ecef;
    --shadow-color: rgba(0, 0, 0, 0.08);
    --shadow-lg: rgba(0, 0, 0, 0.12);

    --accent-color: #4f46e5;
    --accent-hover: #4338ca;
    --accent-light: rgba(79, 70, 229, 0.12);

    --success-color: #16a34a;
    --success-bg: #f0fdf4;
    --success-border: #bbf7d0;
    --warning-color: #d97706;
    --warning-bg: #fffbeb;
    --warning-border: #fde68a;
    --error-color: #dc2626;
    --danger-color: #dc2626;
    --error-bg: #fef2f2;
    --error-border: #fecaca;
    --info-color: #2563eb;
    --info-bg: #eff6ff;
    --info-border: #bfdbfe;

    --sidebar-bg: #1e293b;
    --sidebar-text: #cbd5e1;
    --sidebar-hover: #334155;
    --sidebar-active: #4f46e5;
    --sidebar-width: 240px;

    --navbar-height: 56px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: 0.2s ease;

    --badge-admin-bg: #4f46e5;
    --badge-admin-text: #ffffff;
    --badge-hr-bg: #0891b2;
    --badge-hr-text: #ffffff;
    --badge-success-bg: #dcfce7;
    --badge-success-text: #166534;
    --badge-danger-bg: #fee2e2;
    --badge-danger-text: #991b1b;
    --badge-warning-bg: #fef3c7;
    --badge-warning-text: #92400e;
    --badge-info-bg: #dbeafe;
    --badge-info-text: #1e40af;
}

/* ============================================
   Dark Theme
   ============================================ */
[data-theme="dark"] {
    --bg-primary: #1a1d23;
    --bg-secondary: #22252b;
    --bg-tertiary: #2a2d33;
    --text-primary: #e4e6eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --border-color: #374151;
    --border-light: #2d3139;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);

    --accent-color: #818cf8;
    --accent-hover: #6366f1;
    --accent-light: rgba(129, 140, 248, 0.15);

    --success-color: #4ade80;
    --success-bg: rgba(74, 222, 128, 0.1);
    --success-border: rgba(74, 222, 128, 0.3);
    --warning-color: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.1);
    --warning-border: rgba(251, 191, 36, 0.3);
    --error-color: #f87171;
    --danger-color: #f87171;
    --error-bg: rgba(248, 113, 113, 0.1);
    --error-border: rgba(248, 113, 113, 0.3);
    --info-color: #60a5fa;
    --info-bg: rgba(96, 165, 250, 0.1);
    --info-border: rgba(96, 165, 250, 0.3);

    --sidebar-bg: #111318;
    --sidebar-text: #9ca3af;
    --sidebar-hover: #1f2937;
    --sidebar-active: #818cf8;

    --badge-admin-bg: #818cf8;
    --badge-admin-text: #1a1d23;
    --badge-hr-bg: #22d3ee;
    --badge-hr-text: #1a1d23;
    --badge-success-bg: rgba(74, 222, 128, 0.15);
    --badge-success-text: #4ade80;
    --badge-danger-bg: rgba(248, 113, 113, 0.15);
    --badge-danger-text: #f87171;
    --badge-warning-bg: rgba(251, 191, 36, 0.15);
    --badge-warning-text: #fbbf24;
    --badge-info-bg: rgba(96, 165, 250, 0.15);
    --badge-info-text: #60a5fa;
}

/* ============================================
   Reset & Base
   ============================================ */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 14px;
    overflow-x: hidden;
}

a {
    color: var(--accent-color);
    text-decoration: none;
}
a:hover {
    color: var(--accent-hover);
}

/* ============================================
   Layout
   ============================================ */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.content-area {
    flex: 1;
    padding: 24px;
    margin-top: var(--navbar-height);
}

/* ============================================
   Footer
   ============================================ */
.app-footer {
    text-align: center;
    padding: 16px 24px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    background: var(--bg-primary);
}

/* ============================================
   Sidebar
   ============================================ */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    z-index: 100;
    overflow-y: auto;
    transition: width var(--transition);
}

.sidebar-header {
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-logo {
    width: 32px;
    height: 32px;
    background: var(--accent-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    flex-shrink: 0;
}

.sidebar-brand {
    font-size: 0.95rem;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.sidebar-section-label {
    padding: 8px 20px 4px;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--sidebar-text);
    font-size: 0.875rem;
    transition: all var(--transition);
    border-left: 3px solid transparent;
}

.sidebar-link:hover {
    background: var(--sidebar-hover);
    color: #fff;
}

.sidebar-link.active {
    background: var(--sidebar-hover);
    color: #fff;
    border-left-color: var(--sidebar-active);
}

.sidebar-link .icon {
    width: 20px;
    text-align: center;
    font-size: 1rem;
    flex-shrink: 0;
}

/* ============================================
   Navbar
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--navbar-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 99;
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.navbar-page-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.navbar-clock {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.navbar-user {
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-user .user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent-light);
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.8rem;
}

.navbar-user .user-info {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.navbar-user .user-name {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}

.navbar-user .user-role {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
    white-space: nowrap;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-color);
    color: #fff;
}
.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-color);
}
.btn-secondary:hover {
    background: var(--border-color);
}

.btn-danger {
    background: var(--error-color);
    color: #fff;
}
.btn-danger:hover {
    background: #b91c1c;
    color: #fff;
}

.btn-success {
    background: var(--success-color);
    color: #fff;
}
.btn-success:hover {
    background: #15803d;
    color: #fff;
}

.btn-warning {
    background: var(--warning-color);
    color: #fff;
}
.btn-warning:hover {
    background: #b45309;
    color: #fff;
}

.btn-dark {
    background: #fff;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-sm {
    padding: 5px 10px;
    font-size: 0.8rem;
}

.btn-theme-sm {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--text-primary);
    transition: all var(--transition);
}
.btn-theme-sm:hover {
    background: var(--border-color);
}

/* ============================================
   Tables
   ============================================ */
.table-container {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--bg-secondary);
}

.data-table th {
    padding: 12px 16px;
    text-align: left;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    border-bottom: 1px solid var(--border-color);
    white-space: nowrap;
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.data-table tbody tr:hover {
    background: var(--bg-secondary);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 40px 16px !important;
}

.actions-cell {
    display: flex;
    gap: 6px;
}

/* ============================================
   Badges
   ============================================ */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    white-space: nowrap;
}

.badge-admin {
    background: var(--badge-admin-bg);
    color: var(--badge-admin-text);
}
.badge-hr {
    background: var(--badge-hr-bg);
    color: var(--badge-hr-text);
}
.badge-success {
    background: var(--badge-success-bg);
    color: var(--badge-success-text);
}
.badge-danger {
    background: var(--badge-danger-bg);
    color: var(--badge-danger-text);
}
.badge-warning {
    background: var(--badge-warning-bg);
    color: var(--badge-warning-text);
}
.badge-info {
    background: var(--badge-info-bg);
    color: var(--badge-info-text);
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: 0 1px 4px var(--shadow-color);
}

.stat-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: box-shadow var(--transition);
}

.stat-card:hover {
    box-shadow: 0 4px 12px var(--shadow-lg);
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.stat-card .stat-icon.blue  { background: var(--info-bg); color: var(--info-color); }
.stat-card .stat-icon.green { background: var(--success-bg); color: var(--success-color); }
.stat-card .stat-icon.red   { background: var(--error-bg); color: var(--error-color); }
.stat-card .stat-icon.amber { background: var(--warning-bg); color: var(--warning-color); }

.stat-card .stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

/* ============================================
   Page Header
   ============================================ */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.page-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ============================================
   Forms
   ============================================ */
.form-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: border-color var(--transition);
    box-sizing: border-box;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-light);
}

select.form-control {
    appearance: auto;
}

.form-check-input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-help {
    display: block;
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 24px;
}

.errorlist {
    list-style: none;
    padding: 0;
    margin: 4px 0 0 0;
}
.errorlist li {
    color: var(--error-color);
    font-size: 0.8rem;
}

/* ============================================
   Alerts
   ============================================ */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.alert-success {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-color);
}

.alert-error {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-color);
}

.alert-warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning-color);
}

.alert-info {
    background: var(--info-bg);
    border: 1px solid var(--info-border);
    color: var(--info-color);
}

/* ============================================
   Text Helpers
   ============================================ */
.text-muted {
    color: var(--text-muted);
}

/* ============================================
   Filter Bar
   ============================================ */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

.filter-bar .form-control {
    width: auto;
    min-width: 160px;
}

.filter-bar .search-input {
    flex: 1;
    min-width: 200px;
}

/* ============================================
   Pagination
   ============================================ */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 16px;
    flex-wrap: wrap;
}
.pagination-info {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-right: 12px;
}
.pagination .page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 34px;
    height: 34px;
    padding: 0 8px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
}
.pagination .page-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-color);
    color: var(--accent-color);
}
.pagination .page-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
    font-weight: 600;
}
.pagination .page-btn.disabled {
    opacity: 0.4;
    pointer-events: none;
    cursor: default;
}
.pagination .page-ellipsis {
    padding: 0 4px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ============================================
   Scrollbar (dark mode friendly)
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ============================================
   Responsive (Tablet)
   ============================================ */
@media (max-width: 1024px) {
    .sidebar {
        width: 60px;
    }
    .sidebar-brand,
    .sidebar-section-label,
    .sidebar-link span:not(.icon) {
        display: none;
    }
    .sidebar-link {
        justify-content: center;
        padding: 12px;
    }
    .main-content {
        margin-left: 60px;
    }
    .navbar {
        left: 60px;
    }
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}