/* ============================================
   RESPONSIVE CSS - Mobile Optimization
   ============================================ */

/* Tablet (max-width: 1024px) */
@media (max-width: 1024px) {
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .admin-sidebar {
        width: 200px;
    }

    .admin-main {
        margin-left: 200px;
    }
}

/* Mobile (max-width: 768px) */
@media (max-width: 768px) {

    /* Header */
    .header-container {
        padding: 0.75rem 1rem;
    }

    .logo-text {
        display: none;
    }

    .nav {
        gap: 0.5rem;
    }

    .nav-link {
        padding: 0.5rem;
        font-size: 0.85rem;
    }

    /* Hide elements */
    .user-email {
        display: none;
    }

    .lang-selector {
        margin-right: 0.5rem;
    }

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

    .stat-box {
        padding: 1rem;
    }

    .stat-box .value {
        font-size: 1.5rem;
    }

    /* Tables */
    .data-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .data-table th,
    .data-table td {
        padding: 8px 10px;
        font-size: 0.85rem;
    }

    /* Admin Layout */
    .admin-sidebar {
        position: fixed;
        left: -250px;
        width: 250px;
        transition: left 0.3s;
        z-index: 1000;
    }

    .admin-sidebar.active {
        left: 0;
    }

    .admin-main {
        margin-left: 0;
        padding: 1rem;
    }

    /* Mobile menu toggle */
    .mobile-menu-btn {
        display: flex;
    }

    /* Cards */
    .card,
    .table-container,
    .chart-box {
        padding: 1rem;
        border-radius: 8px;
    }

    /* Forms */
    .form-group {
        margin-bottom: 0.75rem;
    }

    input,
    select,
    textarea {
        padding: 10px !important;
        font-size: 16px;
        /* Prevent zoom on iOS */
    }

    /* Buttons */
    .btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }

    .btn-sm {
        padding: 6px 10px;
        font-size: 0.8rem;
    }

    /* Dashboard main */
    .dashboard-main {
        padding: 1rem !important;
    }

    /* Footer */
    .footer-container {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* Small Mobile (max-width: 480px) */
@media (max-width: 480px) {
    .stat-box {
        padding: 0.75rem;
    }

    .stat-box .value {
        font-size: 1.25rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .admin-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    /* Hide less important table columns */
    .data-table th:nth-child(n+4),
    .data-table td:nth-child(n+4) {
        display: none;
    }
}

/* Touch-friendly improvements */
@media (hover: none) and (pointer: coarse) {

    .btn,
    .nav-link,
    .admin-nav a,
    .theme-toggle {
        min-height: 44px;
        min-width: 44px;
    }

    .user-dropdown,
    .lang-dropdown {
        min-width: 200px;
    }

    .dropdown-item {
        padding: 12px 16px;
    }
}

/* Accessibility - Focus visible */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    z-index: 10000;
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #ffffff;
    }

    .btn-primary {
        border: 2px solid white;
    }

    .badge {
        border: 1px solid currentColor;
    }
}