/* ===== CSS Variables ===== */
:root {
    /* Layout */
    --sidebar-width: 220px;
    --topbar-height: 60px;

    /* Colors - base */
    --bg-main: #f0f2f5;
    --bg-card: #ffffff;
    --bg-sidebar: #1a1d28;
    --bg-sidebar-hover: #2a2e3d;
    --bg-sidebar-active: #3b82f6;
    --bg-topbar: #ffffff;
    --bg-input: #f8f9fa;
    --bg-table-hover: #f5f7fa;
    --bg-table-header: #f0f2f5;

    /* Text */
    --text-primary: #1a1d28;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-sidebar: #a0a3b1;
    --text-sidebar-active: #ffffff;

    /* A-share convention: red=up, green=down */
    --color-up: #e74c3c;
    --color-up-light: #fdf0ef;
    --color-down: #27ae60;
    --color-down-light: #eef9f1;
    --color-primary: #3b82f6;
    --color-primary-dark: #2563eb;
    --color-danger: #e74c3c;
    --color-danger-dark: #c0392b;
    --color-warning: #f39c12;
    --color-info: #3498db;
    --color-success: #27ae60;

    /* Border */
    --border-color: #e5e7eb;
    --border-radius: 10px;
    --border-radius-sm: 6px;

    /* Shadow */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition: all 0.2s ease;

    /* Font */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, sans-serif;
}

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

html, body {
    font-family: var(--font-family);
    background: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 1000;
}

.sidebar-header {
    padding: 20px 18px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sidebar-header i {
    font-size: 24px;
    color: var(--color-primary);
}

.sidebar-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 8px;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    color: var(--text-sidebar);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    margin-bottom: 4px;
    font-size: 14px;
}

.nav-item i {
    width: 18px;
    text-align: center;
    font-size: 15px;
}

.nav-item:hover {
    background: var(--bg-sidebar-hover);
    color: #fff;
}

.nav-item.active {
    background: var(--bg-sidebar-active);
    color: var(--text-sidebar-active);
    font-weight: 600;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-sidebar);
    margin-bottom: 10px;
}

.user-info i {
    font-size: 18px;
    color: var(--text-light);
}

.logout-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(231, 76, 60, 0.15);
    color: var(--color-danger);
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    transition: var(--transition);
}

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

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== Topbar ===== */
.topbar {
    height: var(--topbar-height);
    background: var(--bg-topbar);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.page-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

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

.scan-date-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-input);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

.scan-date-badge i {
    color: var(--color-primary);
}

/* ===== Flash Messages ===== */
.flash-container {
    padding: 16px 24px 0;
}

.flash {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    margin-bottom: 8px;
    font-size: 14px;
    animation: slideDown 0.3s ease;
}

.flash-flash-full {
    margin-bottom: 16px;
}

.flash-success {
    background: var(--color-down-light);
    color: var(--color-down);
    border-left: 4px solid var(--color-down);
}

.flash-error {
    background: var(--color-up-light);
    color: var(--color-up);
    border-left: 4px solid var(--color-up);
}

.flash-warning {
    background: #fef9e7;
    color: var(--color-warning);
    border-left: 4px solid var(--color-warning);
}

.flash-info {
    background: #ebf5fb;
    color: var(--color-info);
    border-left: 4px solid var(--color-info);
}

.flash-close {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    opacity: 0.6;
    padding: 4px;
    font-size: 14px;
}

.flash-close:hover {
    opacity: 1;
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== Content ===== */
.content {
    padding: 24px;
    flex: 1;
}

/* ===== Card Grid ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

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

.summary-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
}

.card-buy .card-icon { background: var(--color-up-light); color: var(--color-up); }
.card-sell .card-icon { background: var(--color-down-light); color: var(--color-down); }
.card-holding .card-icon { background: #eef2ff; color: var(--color-primary); }
.card-backtest .card-icon { background: #fef3e7; color: var(--color-warning); }

.card-body {
    flex: 1;
    min-width: 0;
}

.card-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.card-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--color-primary);
    text-decoration: none;
    margin-top: 6px;
    transition: var(--transition);
}

.card-link:hover {
    gap: 8px;
}

/* ===== Info Banner ===== */
.info-banner {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 16px 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.info-item i {
    color: var(--color-primary);
}

.info-item strong {
    color: var(--text-primary);
    font-size: 16px;
}

/* ===== Quick Links ===== */
.quick-links {
    margin-top: 8px;
}

.section-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.quick-link-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.quick-link-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--color-primary);
}

.quick-link-card i {
    font-size: 24px;
    color: var(--color-primary);
}

.quick-link-card span {
    font-weight: 600;
    font-size: 15px;
}

.quick-link-card small {
    color: var(--text-secondary);
    font-size: 12px;
}

/* ===== Page Section ===== */
.page-section {
    max-width: 100%;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.section-info {
    font-size: 14px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.section-info strong {
    color: var(--text-primary);
}

.separator {
    margin: 0 8px;
    color: var(--text-light);
}

/* ===== Search Box ===== */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box i {
    position: absolute;
    left: 12px;
    color: var(--text-light);
    font-size: 14px;
}

.search-box input {
    padding: 8px 12px 8px 34px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 13px;
    width: 220px;
    background: var(--bg-card);
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ===== Tables ===== */
.table-wrapper {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

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

.data-table th {
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    border-bottom: 1px solid var(--border-color);
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

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

.data-table tbody tr {
    transition: var(--transition);
}

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

.data-table-secondary th {
    font-size: 12px;
}

.data-table-secondary td {
    color: var(--text-secondary);
    font-size: 13px;
}

.num-col {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.code-col {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 13px;
    color: var(--color-primary);
    font-weight: 600;
}

.name-col {
    font-weight: 500;
}

/* A-share color convention */
.text-up {
    color: var(--color-up);
    font-weight: 600;
}

.text-down {
    color: var(--color-down);
    font-weight: 600;
}

/* ===== Status Badges ===== */
.status-badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.status-holding {
    background: #eef2ff;
    color: var(--color-primary);
}

.status-buy {
    background: var(--color-up-light);
    color: var(--color-up);
}

.status-sell {
    background: var(--color-down-light);
    color: var(--color-down);
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 22px;
    height: 22px;
    padding: 0 6px;
    border-radius: 11px;
    font-size: 12px;
    font-weight: 700;
    margin-left: 4px;
}

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

.badge-secondary {
    background: var(--bg-table-header);
    color: var(--text-secondary);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    font-family: inherit;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

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

.btn-danger:hover {
    background: var(--color-danger-dark);
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.3);
}

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

.btn-secondary:hover {
    background: var(--bg-table-hover);
}

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

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

.btn-sm {
    padding: 5px 10px;
    font-size: 13px;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

.action-buttons {
    display: flex;
    gap: 6px;
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state i {
    font-size: 48px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.empty-state h3 {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.empty-state-small {
    padding: 32px 20px;
}

.empty-state-small i {
    font-size: 32px;
    margin-bottom: 8px;
}

/* ===== Collapsible Section ===== */
.collapsible-section {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.collapsible-section .section-header {
    padding: 16px 20px;
    margin-bottom: 0;
    border-bottom: 1px solid var(--border-color);
}

.collapsible-content {
    padding: 20px;
}

/* ===== Forms ===== */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    align-items: start;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group-full {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 5px;
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 9px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    background: var(--bg-input);
    transition: var(--transition);
    font-family: inherit;
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ===== Modal ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.2s ease;
}

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

.modal {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.25s ease;
}

.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: 17px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 18px;
    color: var(--text-light);
    cursor: pointer;
    padding: 4px;
    transition: var(--transition);
}

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

.modal-body {
    padding: 20px;
}

.modal-body .form-group {
    margin-bottom: 14px;
}

.modal-info-bar {
    background: var(--bg-input);
    border-radius: var(--border-radius-sm);
    padding: 12px 16px;
    margin-bottom: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

.modal-info-bar strong {
    color: var(--text-primary);
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(-10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ===== Login Page ===== */
.login-page {
    background: linear-gradient(135deg, #1a1d28 0%, #2d3748 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 32px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

.login-logo i {
    font-size: 48px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.login-logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.login-logo p {
    font-size: 14px;
    color: var(--text-secondary);
}

.login-form .form-group {
    margin-bottom: 18px;
}

.login-form .form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.login-form input {
    padding: 11px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 15px;
    width: 100%;
    transition: var(--transition);
    font-family: inherit;
}

.login-form input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ===== Backtest Metrics ===== */
.metric-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    text-align: center;
}

.metric-label {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.metric-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.metrics-row {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 16px 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.mini-metric {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mini-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.mini-metric span:last-child {
    font-weight: 600;
    font-size: 15px;
}

/* ===== Chart Container ===== */
.chart-container {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
}

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

.toggle-group {
    display: flex;
    gap: 6px;
    background: var(--bg-input);
    border-radius: var(--border-radius-sm);
    padding: 3px;
}

.toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border: none;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    background: transparent;
    color: var(--text-secondary);
    transition: var(--transition);
    font-family: inherit;
}

.toggle-btn:hover {
    color: var(--text-primary);
}

.toggle-btn.active {
    background: #fff;
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
    font-weight: 600;
}

.toggle-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--line-color, #999);
}

.chart-wrapper {
    width: 100%;
    overflow-x: auto;
}

.chart-wrapper canvas {
    width: 100% !important;
    max-height: 420px;
}

.equity-curve-img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-sm);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
        overflow: hidden;
    }

    .sidebar-title,
    .sidebar-nav .nav-item span,
    .sidebar-footer .user-info span,
    .logout-btn span {
        display: none;
    }

    .sidebar-header {
        justify-content: center;
    }

    .sidebar-footer .logout-btn {
        padding: 8px;
    }

    .main-content {
        margin-left: 60px;
    }

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

    .search-box input {
        width: 140px;
    }

    .topbar {
        padding: 0 12px;
    }

    .content {
        padding: 12px;
    }

    .page-title {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .card-grid {
        grid-template-columns: 1fr;
    }

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

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: #cbd0d8;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8aeb8;
}

.sidebar ::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
}

.sidebar ::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* ===== Loading Overlay ===== */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.7);
    z-index: 3000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 12px;
}

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

.loading-overlay i {
    font-size: 32px;
    color: var(--color-primary);
    animation: spin 1s linear infinite;
}

.loading-overlay span {
    font-size: 14px;
    color: var(--text-secondary);
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}