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

:root {
    --sidebar-bg: #1a1a2e;
    --sidebar-hover: #16213e;
    --sidebar-active: #0f3460;
    --sidebar-text: #a0aec0;
    --sidebar-text-active: #e2e8f0;
    --sidebar-width: 220px;
    --header-height: 56px;
    --content-bg: #f0f2f5;
    --card-bg: #ffffff;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #a0aec0;
    --border-color: #e2e8f0;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #eef2ff;
    --success: #10b981;
    --success-light: #d1fae5;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #3b82f6;
    --info-light: #dbeafe;
    --radius: 8px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --transition: all 0.2s ease;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    color: var(--text-primary);
    background: var(--content-bg);
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    text-decoration: underline;
}

/* ===== Login Page ===== */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.login-card {
    width: 400px;
    background: var(--card-bg);
    border-radius: 12px;
    padding: 48px 40px;
    box-shadow: var(--shadow-lg);
}

.login-card .logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-card .logo h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 2px;
}

.login-card .logo p {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 8px;
}

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

.login-card .form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.login-card .form-group input {
    width: 100%;
    height: 42px;
    padding: 0 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
}

.login-card .form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

.login-card .btn-login {
    width: 100%;
    height: 44px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
}

.login-card .btn-login:hover {
    background: var(--primary-hover);
}

.login-card .login-error {
    background: var(--danger-light);
    color: var(--danger);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}

.login-card .login-error.show {
    display: block;
}

/* ===== App Layout ===== */
.app-wrapper {
    display: none;
    height: 100vh;
}

.app-wrapper.active {
    display: flex;
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 20px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 1px;
}

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

.nav-item {
    display: flex;
    align-items: center;
    padding: 11px 20px;
    color: var(--sidebar-text);
    cursor: pointer;
    transition: var(--transition);
    font-size: 14px;
    border-left: 3px solid transparent;
    user-select: none;
}

.nav-item:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-text-active);
}

.nav-item.active {
    background: var(--sidebar-active);
    color: var(--sidebar-text-active);
    border-left-color: var(--primary);
}

.nav-item .nav-icon {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

.nav-item .nav-label {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ===== Main Area ===== */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ===== Hamburger Sidebar Toggle ===== */
.sidebar-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 22px;
    cursor: pointer;
    padding: 4px 8px;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    line-height: 1;
}

.sidebar-toggle:hover {
    background: #f1f5f9;
}

@media (max-width: 768px) {
    .sidebar-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
}

/* ===== Header ===== */
.header {
    height: var(--header-height);
    min-height: var(--header-height);
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

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

.header-left .page-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

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

.header-right .admin-info {
    font-size: 13px;
    color: var(--text-secondary);
}

.header-right .btn-logout {
    padding: 6px 16px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.header-right .btn-logout:hover {
    border-color: var(--danger);
    color: var(--danger);
}

/* ===== Content ===== */
.content {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.page-section {
    display: none;
}

.page-section.active {
    display: block;
}

/* ===== Cards ===== */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    padding: 20px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-header h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    min-height: 0;
}

/* ===== Stat Cards ===== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-card .stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}

.stat-card .stat-icon.blue {
    background: var(--info-light);
    color: var(--info);
}

.stat-card .stat-icon.green {
    background: var(--success-light);
    color: var(--success);
}

.stat-card .stat-icon.orange {
    background: var(--warning-light);
    color: var(--warning);
}

.stat-card .stat-icon.red {
    background: var(--danger-light);
    color: var(--danger);
}

.stat-card .stat-icon.purple {
    background: var(--primary-light);
    color: var(--primary);
}

.stat-card .stat-info .stat-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.stat-card .stat-info .stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ===== Tables ===== */
.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

table thead th {
    background: #f8fafc;
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
}

table tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

table tbody tr:hover {
    background: #f8fafc;
}

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

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    line-height: 1.4;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
}

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

.btn-success:hover {
    background: #059669;
}

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

.btn-warning:hover {
    background: #d97706;
}

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

.btn-danger:hover {
    background: #dc2626;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

input:disabled,
.form-control:disabled,
select.form-control:disabled,
textarea.form-control:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: #f1f5f9;
    color: var(--text-muted);
}

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ===== Tags / Badges ===== */
.tag {
    display: inline-flex;
    align-items: center;
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.tag-draft {
    background: #f1f5f9;
    color: #64748b;
}

.tag-rolling {
    background: var(--info-light);
    color: var(--info);
}

.tag-released {
    background: var(--success-light);
    color: var(--success);
}

.tag-paused {
    background: var(--warning-light);
    color: var(--warning);
}

.tag-rolled-back {
    background: var(--danger-light);
    color: var(--danger);
}

.tag-active {
    background: var(--success-light);
    color: var(--success);
}

.tag-expired {
    background: var(--danger-light);
    color: var(--danger);
}

.tag-inactive {
    background: #f1f5f9;
    color: #64748b;
}

.tag-global {
    background: var(--primary-light);
    color: var(--primary);
}

.tag-group {
    background: var(--info-light);
    color: var(--info);
}

.tag-client {
    background: var(--warning-light);
    color: var(--warning);
}

.tag-pending {
    background: #fef3c7;
    color: #d97706;
}

.tag-error {
    background: var(--danger-light);
    color: var(--danger);
}

.tag-warning {
    background: var(--warning-light);
    color: var(--warning);
}

.tag-info {
    background: var(--info-light);
    color: var(--info);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--danger);
    margin-left: 2px;
}

.form-control {
    width: 100%;
    height: 38px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
    background: #fff;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

textarea.form-control {
    height: auto;
    min-height: 80px;
    padding: 8px 12px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.45);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    width: 560px;
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    animation: modalIn 0.2s ease;
}

.modal.wide {
    width: 720px;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.97);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 16px;
    font-weight: 600;
}

.modal-close {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 18px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.modal-close:hover {
    background: #f1f5f9;
    color: var(--text-primary);
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    padding: 12px 20px;
    border-top: 1px solid var(--border-color);
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    font-size: 13px;
    color: var(--text-muted);
}

.pagination-info {
    color: var(--text-muted);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pagination-controls .page-btn {
    min-width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.pagination-controls .page-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.pagination-controls .page-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.pagination-controls .page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ===== Toolbar ===== */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.search-input {
    width: 240px;
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

.filter-select {
    height: 36px;
    padding: 0 32px 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    outline: none;
    appearance: none;
    background: #fff;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    cursor: pointer;
    transition: var(--transition);
}

.filter-select:focus {
    border-color: var(--primary);
}

/* ===== Chart Container ===== */
.chart-container {
    width: 100%;
    height: 300px;
    min-height: 260px;
}

.chart-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* ===== Alert List ===== */
.alert-list {
    list-style: none;
}

.alert-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.alert-item:last-child {
    border-bottom: none;
}

.alert-item .alert-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 6px;
    flex-shrink: 0;
}

.alert-item .alert-dot.error {
    background: var(--danger);
}

.alert-item .alert-dot.warning {
    background: var(--warning);
}

.alert-item .alert-dot.info {
    background: var(--info);
}

.alert-item .alert-content {
    flex: 1;
    min-width: 0;
}

.alert-item .alert-content .alert-title {
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
}

.alert-item .alert-content .alert-desc {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
    word-break: break-all;
}

.alert-item .alert-time {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
}

.empty-state .empty-icon {
    font-size: 40px;
    margin-bottom: 12px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 14px;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 20px;
}

.tab-item {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
    user-select: none;
}

.tab-item:hover {
    color: var(--text-secondary);
}

.tab-item.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

/* ===== Config Scope Section ===== */
.scope-section {
    margin-bottom: 24px;
}

.scope-section .scope-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ===== Rollout Progress ===== */
.rollout-progress {
    margin: 16px 0;
}

.progress-bar-bg {
    width: 100%;
    height: 8px;
    background: #e2e8f0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.4s ease;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== History Timeline ===== */
.timeline {
    position: relative;
    padding-left: 24px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 4px;
    bottom: 4px;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 16px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -20px;
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid #fff;
    box-shadow: 0 0 0 2px var(--primary);
}

.timeline-item .timeline-time {
    font-size: 12px;
    color: var(--text-muted);
}

.timeline-item .timeline-content {
    font-size: 13px;
    color: var(--text-primary);
    margin-top: 2px;
}

.timeline-item .timeline-detail {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ===== Toast / Notification ===== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 13px;
    box-shadow: var(--shadow-md);
    animation: toastIn 0.3s ease;
    max-width: 360px;
    word-break: break-word;
}

.toast-success {
    background: var(--success);
    color: #fff;
}

.toast-error {
    background: var(--danger);
    color: #fff;
}

.toast-warning {
    background: var(--warning);
    color: #fff;
}

.toast-info {
    background: var(--info);
    color: #fff;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== Loading ===== */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    color: var(--text-muted);
    gap: 10px;
}

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

/* ===== Confirm Dialog ===== */
.confirm-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.45);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1100;
}

.confirm-overlay.active {
    display: flex;
}

.confirm-box {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 24px;
    width: 400px;
    max-width: 90vw;
    box-shadow: var(--shadow-lg);
}

.confirm-box .confirm-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 10px;
}

.confirm-box .confirm-msg {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.confirm-box .confirm-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* ===== Focus Visible (Keyboard Navigation) ===== */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.btn:focus-visible,
.nav-item:focus-visible,
.tab-item:focus-visible,
.page-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 0;
}

.modal-close:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: -2px;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: #c1c9d2;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a0aec0;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -240px;
        top: 0;
        height: 100vh;
        transition: left 0.3s ease;
        z-index: 200;
    }

    .sidebar.open {
        left: 0;
    }

    .stat-grid {
        grid-template-columns: 1fr;
    }

    .chart-row {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar-left, .toolbar-right {
        width: 100%;
    }

    .search-input {
        width: 100%;
    }
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--text-muted); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-primary { color: var(--primary); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.gap-8 { gap: 8px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 200px;
}
.mono {
    font-family: "Cascadia Code", "Fira Code", "Consolas", monospace;
    font-size: 12px;
}

/* ===== Print Styles ===== */
@media print {
    .sidebar,
    .header,
    .modal-overlay,
    .confirm-overlay,
    .toast-container,
    .btn-logout,
    .toolbar {
        display: none !important;
    }

    .app-wrapper {
        display: block !important;
    }

    .main-area {
        overflow: visible;
    }

    .content {
        overflow: visible;
        padding: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
        page-break-inside: avoid;
    }

    .page-section {
        display: block !important;
    }
}