/* ============================================================================
   CARMONApp - Sales Intelligence Dashboard
   CSS Import Coordinator
   ============================================================================ */

/* Theme & Token Foundation */
@import url('themes/m3-dark.css');    /* M3 dark theme tokens (default) */
@import url('tokens.css');            /* Legacy variable mappings -> M3 */
@import url('themes/terminal.css');   /* Terminal theme override (via data-theme) */
@import url('reset.css');             /* Base resets */

/* Component imports */
@import url('components/card.css');
@import url('components/chip.css');
@import url('components/button.css');
@import url('components/topbar.css');
@import url('components/table.css');
@import url('components/input.css');
@import url('components/sidebar.css');
@import url('components/drawer.css');
@import url('components/tabs.css');
@import url('components/analytics.css');
@import url('components/forecast.css');
@import url('components/home.css');
@import url('components/products.css');
@import url('components/audit.css');

/* Layout imports */
@import url('layouts/grid.css');
@import url('layouts/page.css');

/* Utility imports */
@import url('utilities/a11y.css');
@import url('utilities/animation.css');
@import url('utilities/mui-layout.css');


/* ============================================================================
   Container
   ============================================================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Legacy header/navbar removed — now using M3 topbar (components/topbar.css) */

/* ============================================================================
   Main Content
   ============================================================================ */

main {
    padding: var(--spacing-2xl) 0;
    min-height: calc(100vh - 200px);
}

.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    font-size: 1rem;
    color: var(--color-text-light);
}

/* ============================================================================
   Cards
   ============================================================================ */

/* Legacy .cards grid removed — now using .m3-nav-cards in page CSS */

.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s, transform 0.3s;
}

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

.card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.card p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* ============================================================================
   Buttons
   ============================================================================ */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background-color: #333333;
    color: #ffffff;
    border: 1px solid #555555;
}

.btn-primary:hover {
    background-color: #444444;
    border-color: #666666;
}

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

.btn-secondary:hover {
    background-color: var(--color-border);
}

/* ============================================================================
   Tables (Compact)
   ============================================================================ */

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

thead {
    background-color: var(--color-bg-dark);
    border-bottom: 2px solid var(--color-border);
}

th {
    padding: 0.25rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-text);
    white-space: nowrap;
    border-right: 1px solid var(--color-border);
}

th:last-child {
    border-right: none;
}

/* Right-align all columns except first (labels) */
th:not(:first-child),
td:not(:first-child) {
    text-align: right;
}

td {
    padding: 0.25rem;
    border-bottom: 1px solid var(--color-border);
    border-right: 1px solid var(--color-border);
    color: var(--color-text-light);
}

td:last-child {
    border-right: none;
}

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

tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Bundle Affinity table - left-align product columns */
#bundleTable td:first-child,
#bundleTable td:nth-child(2),
#bundleTable th:first-child,
#bundleTable th:nth-child(2) {
    text-align: left;
    width: 15%;
}

/* Percentage styling - Conditional colors */
.percentage {
    font-weight: 700;
    font-size: 0.9rem;
}

.percentage.positive {
    color: var(--color-positive, #4ADE80);
}

.percentage.negative {
    color: var(--color-negative, #FF6B9D);
}

/* Sortable table headers */
th.sortable {
    cursor: pointer;
    user-select: none;
}

th.sortable:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* ============================================================================
   Stats Cards
   ============================================================================ */

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.stat-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
}

.stat-change {
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.stat-change.positive {
    color: var(--color-positive, #4ADE80);
}

.stat-change.negative {
    color: var(--color-negative, #FF6B9D);
}

/* ============================================================================
   Product Intelligence Controls
   ============================================================================ */

.controls {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.controls label {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-right: 4px;
}

.controls select {
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text);
    min-width: 180px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.controls input[type="text"],
.controls input[type="number"] {
    padding: 8px 10px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text);
    min-width: 160px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.controls input[type="checkbox"] {
    margin-right: 6px;
}

.ghost-btn {
    margin-top: 12px;
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
    font-size: 0.75rem;
    font-family: var(--font-mono);
}

.ghost-btn:hover {
    background: rgba(255, 255, 255, 0.08);
}

/* Stat Pills (for retention summary) */
.stat-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.stat-pill {
    padding: 12px;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-dark);
}

.stat-pill .label {
    font-size: 12px;
    color: var(--color-text-light);
}

.stat-pill .value {
    font-size: 16px;
    font-weight: 600;
}

.stat-pill .value.emphasis {
    font-size: 24px;
}

.typeahead {
    position: relative;
}

.typeahead-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    z-index: 20;
    max-height: 220px;
    overflow-y: auto;
    display: none;
}

.typeahead-item {
    padding: 8px 10px;
    cursor: pointer;
    font-size: 12px;
    color: var(--color-text);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
}

.typeahead-item:hover,
.typeahead-item.active {
    background: rgba(255, 255, 255, 0.08);
}

.typeahead-item .meta {
    color: var(--color-text-light);
    font-size: 11px;
}

/* Quick Stats Summary */
.stats-summary {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.stat-pill .sublabel {
    font-size: 10px;
    color: var(--color-text-light);
    margin-top: 2px;
}

.stat-pill .value.positive {
    color: var(--color-positive, #4ADE80);
}

.stat-pill .value.negative {
    color: var(--color-negative, #FF6B9D);
}

/* Scrollable data panes */
.scrollable-table-container {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.scrollable-table-container table {
    border: none;
}

/* Sticky table headers */
.scrollable-table-container thead {
    position: sticky;
    top: 0;
    z-index: 10;
    background: var(--color-bg-dark);
}

/* Side-by-side data panels */
.data-panels-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.data-panels-grid .card {
    margin-bottom: 0;
}

/* Responsive: Stack on smaller screens */
@media (max-width: 1024px) {
    .data-panels-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   Action Insights
   ============================================================================ */

.insights-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.insight-panel {
    background: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--spacing-lg);
}

.insight-title {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    font-size: 0.95rem;
}

.insight-explain {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    font-size: 0.78rem;
    line-height: 1.45;
}

.insight-panel table {
    width: 100%;
    font-size: 0.78rem;
}

.cross-sell-row:hover td {
    background: rgba(139, 218, 255, 0.12);
}

@media (max-width: 900px) {
    .insights-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================================
   Loading & Error States
   ============================================================================ */

.loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-light);
}

.error {
    background-color: rgba(255, 0, 0, 0.1);
    border: 1px solid rgba(255, 0, 0, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    color: #ff6b6b;
    margin: var(--spacing-lg) 0;
}

.hidden {
    display: none;
}

/* ============================================================================
   Footer
   ============================================================================ */

footer {
    background-color: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-2xl);
}

footer p {
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.75rem;
}

/* ============================================================================
   Responsive Design
   ============================================================================ */

@media (max-width: 768px) {
    .page-header h2 {
        font-size: 1.5rem;
    }

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

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

    table {
        font-size: 0.65rem;
    }

    th, td {
        padding: 0.2rem;
    }
}

/* ============================================================================
   Tab Controls (Analytics Page)
   ============================================================================ */

.tab-container {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.tab-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: transparent;
    color: var(--color-text-light);
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

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

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

.tab-content {
    display: none;
}

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

/* ============================================================================
   Loading Skeletons & Animations
   ============================================================================ */

.skeleton {
    background: linear-gradient(90deg,
        var(--md-sys-color-surface-container, #1a1a1a) 25%,
        var(--md-sys-color-surface-container-high, #2a2a2a) 50%,
        var(--md-sys-color-surface-container, #1a1a1a) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--spacing-sm);
}

.skeleton-title {
    height: 1.5rem;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-card {
    height: 200px;
    margin-bottom: var(--spacing-lg);
}

.skeleton-table-row {
    height: 2.5rem;
    margin-bottom: var(--spacing-xs);
}

/* Fade-in animation for loaded content */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

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

/* Loading spinner */
.spinner {
    border: 3px solid var(--md-sys-color-surface-container, #1a1a1a);
    border-top: 3px solid var(--color-percent);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ============================================================================
   Enhanced Table Styles (Sortable)
   ============================================================================ */

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

.sortable-table th {
    cursor: pointer;
    user-select: none;
    position: relative;
    padding-right: 1.5rem;
}

.sortable-table th:hover {
    background: var(--md-sys-color-surface-container, #1a1a1a);
}

.sortable-table th.sortable::after {
    content: '\21C5';
    position: absolute;
    right: 0.5rem;
    opacity: 0.3;
    font-size: 0.8rem;
}

.sortable-table th.sort-asc::after {
    content: '\2191';
    opacity: 1;
    color: var(--color-percent);
}

.sortable-table th.sort-desc::after {
    content: '\2193';
    opacity: 1;
    color: var(--color-percent);
}

.sortable-table tr:hover {
    background: rgba(255, 177, 200, 0.05);
}

/* Table search/filter */
.table-search {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--md-sys-color-surface-container, #1a1a1a);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-mono);
    width: 100%;
    max-width: 300px;
}

.table-search:focus {
    outline: none;
    border-color: var(--color-percent);
    box-shadow: 0 0 0 2px rgba(255, 177, 200, 0.1);
}

/* ============================================================================
   Chart Enhancements (Zoom indicators)
   ============================================================================ */

.chart-container {
    position: relative;
}

.chart-zoom-hint {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    font-size: 0.7rem;
    color: var(--color-text-light);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    background: rgba(0, 0, 0, 0.8);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.chart-container:hover .chart-zoom-hint {
    opacity: 1;
}

/* Zoom cursor */
.apexcharts-canvas {
    cursor: crosshair;
}

.apexcharts-canvas.apexcharts-zoomable {
    cursor: zoom-in;
}

/* ============================================================================
   Tooltips & Popovers (Tippy.js integration)
   ============================================================================ */

.tippy-box {
    background-color: var(--md-sys-color-surface-container-lowest, #0a0a0a);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    box-shadow: var(--shadow-lg);
}

.tippy-box[data-theme~='carmon'] {
    background-color: var(--md-sys-color-surface-container-lowest, #0a0a0a);
    border: 1px solid var(--color-percent);
}

.tippy-box[data-theme~='carmon'] .tippy-arrow {
    color: var(--md-sys-color-surface-container-lowest, #0a0a0a);
}

.tippy-content {
    padding: var(--spacing-sm) var(--spacing-md);
}

/* Tooltip helper classes */
.help-icon {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    line-height: 1rem;
    text-align: center;
    background: var(--color-border);
    color: var(--color-text-light);
    border-radius: 50%;
    font-size: 0.7rem;
    cursor: help;
    margin-left: 0.25rem;
}

.help-icon:hover {
    background: var(--color-percent);
    color: #fff;
}

/* ============================================================================
   Enhanced Loading States
   ============================================================================ */

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(28, 27, 31, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    border-radius: var(--radius-md);
}

.loading-text {
    color: var(--color-text-light);
    font-size: 0.875rem;
    margin-top: var(--spacing-md);
}

/* Shimmer effect for loading cards */
.shimmer {
    background: linear-gradient(
        90deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.1) 20%,
        rgba(255, 177, 200, 0.15) 60%,
        rgba(255, 255, 255, 0)
    );
    animation: shimmer 2s infinite;
    background-size: 200% 100%;
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* ============================================================================
   Interactive Enhancements
   ============================================================================ */

/* Smooth transitions for interactive elements */
.btn,
.card,
table tr {
    transition: all 0.2s ease;
}

/* Hover effects */
.card:hover {
    box-shadow: 0 0 0 1px var(--color-percent);
}

/* Focus states for accessibility */
button:focus,
select:focus,
input:focus,
a:focus {
    outline: 2px solid var(--color-percent);
    outline-offset: 2px;
}

/* Data visualization enhancements */
.stat-pill {
    transition: transform 0.2s ease;
}

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

/* ============================================================================
   Quarterly Target Performance Cards
   ============================================================================ */

.quarterly-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

@media (max-width: 1200px) {
    .quarterly-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .quarterly-grid {
        grid-template-columns: 1fr;
    }
}

.quarter-card {
    background: var(--color-bg-dark);
    border: 2px solid var(--color-border);
    border-radius: 10px;
    padding: var(--spacing-lg);
    text-align: center;
    transition: all 0.3s ease;
}

.quarter-card:hover {
    border-color: var(--color-accent, #8AFFE9);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(138, 255, 233, 0.15);
}

.quarter-card.hit {
    border-color: var(--color-positive, #4ADE80);
    background: rgba(74, 222, 128, 0.05);
}

.quarter-card.miss {
    border-color: var(--color-negative, #FF6B9D);
    background: rgba(255, 107, 157, 0.05);
}

.quarter-card.no-data {
    opacity: 0.5;
    border-color: var(--md-sys-color-surface-variant, #3a3a3a);
}

.quarter-label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.quarter-value {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-mono);
}

.quarter-value.positive {
    color: var(--color-positive, #4ADE80);
}

.quarter-value.negative {
    color: var(--color-negative, #FF6B9D);
}

.quarter-value.neutral {
    color: var(--color-text-light);
}

.quarter-target {
    font-size: 0.7rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.quarter-status {
    font-size: 1rem;
    font-weight: bold;
    margin-bottom: var(--spacing-xs);
}

.quarter-customers {
    font-size: 0.65rem;
    color: var(--color-text-light);
}

/* ============================================================================
   Mobile PWA Enhancements
   ============================================================================ */

/* Touch-friendly buttons and links on mobile */
@media (max-width: 768px) {
    /* Minimum 48x48px touch targets (WCAG 2.1 Level AAA) */
    .btn,
    button,
    a.btn,
    .nav-link,
    .card-link,
    .tab-btn {
        min-height: 48px;
        min-width: 48px;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }

    /* Larger tap targets for navigation */
    .nav-link {
        padding: var(--spacing-lg);
        font-size: 1rem;
    }

    /* Improved table scrolling with touch feedback */
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scroll-behavior: smooth;
    }

    /* Reduce table font size for mobile */
    table {
        font-size: 0.7rem;
    }

    table th,
    table td {
        padding: var(--spacing-sm);
    }

    /* Larger input fields on mobile */
    input,
    select,
    textarea {
        min-height: 48px;
        font-size: 16px; /* Prevents iOS zoom on focus */
        padding: var(--spacing-md);
    }

    /* Stack filters on mobile */
    .filters-row {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .filter-group {
        width: 100%;
    }

    /* Improve card spacing on mobile */
    .card {
        margin-bottom: var(--spacing-lg);
    }

    /* Larger chart legends on mobile */
    .chart-container {
        min-height: 300px;
    }

    /* Sticky headers for better scrolling */
    .page-header {
        position: sticky;
        top: 0;
        z-index: 10;
        background: var(--color-bg);
        padding-bottom: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
}

/* Extra small devices (phones in portrait) */
@media (max-width: 480px) {
    /* Smaller font sizes for very small screens */
    body {
        font-size: 0.875rem;
    }

    .page-header h2 {
        font-size: 1.25rem;
    }

    .card-title {
        font-size: 0.9rem;
    }

    /* Single column for all grids */
    .data-panels-grid,
    .insights-grid,
    .quarterly-grid {
        grid-template-columns: 1fr;
    }

    /* Reduce chart height on small phones */
    .chart-container {
        min-height: 250px;
    }
}

/* iOS-specific fixes */
@supports (-webkit-touch-callout: none) {
    /* Prevent elastic scrolling issues */
    body {
        overscroll-behavior-y: none;
    }

    /* Fix iOS input styling */
    input,
    select,
    textarea {
        -webkit-appearance: none;
        border-radius: var(--radius-sm);
    }
}

/* Android-specific fixes */
@media (max-width: 768px) {
    /* Prevent text size adjustment on orientation change */
    html {
        -webkit-text-size-adjust: 100%;
        text-size-adjust: 100%;
    }

    /* Improve scrolling performance on Android */
    * {
        -webkit-tap-highlight-color: rgba(255, 255, 255, 0.1);
    }
}