@media (max-width: 767px) {
    :root {
        --spacing-4: 0.75rem;
        --spacing-6: 1rem;
        --spacing-8: 1.5rem;
    }

    html {
        font-size: 14px;
    }

    body {
        -webkit-text-size-adjust: 100%;
    }

    .container {
        padding: 0 var(--spacing-4);
    }

    h1 { font-size: var(--font-size-2xl); }
    h2 { font-size: var(--font-size-xl); }
    h3 { font-size: var(--font-size-lg); }

    .btn {
        padding: var(--spacing-3) var(--spacing-4);
        min-height: 44px;
        min-width: 44px;
    }

    .btn-lg {
        padding: var(--spacing-4) var(--spacing-6);
        min-height: 52px;
    }

    .card {
        border-radius: var(--radius-md);
    }

    .card-body {
        padding: var(--spacing-4);
    }

    .form-input,
    .form-select,
    .form-textarea {
        font-size: 16px;
        min-height: 44px;
    }

    .table-container {
        margin: 0 calc(var(--spacing-4) * -1);
        border-left: none;
        border-right: none;
        border-radius: 0;
    }

    .table th,
    .table td {
        padding: var(--spacing-3) var(--spacing-3);
        font-size: var(--font-size-xs);
    }

    .table th:first-child,
    .table td:first-child {
        padding-left: var(--spacing-4);
    }

    .table th:last-child,
    .table td:last-child {
        padding-right: var(--spacing-4);
    }

    .nav {
        padding: var(--spacing-2);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .nav::-webkit-scrollbar {
        display: none;
    }

    .nav-item {
        padding: var(--spacing-2) var(--spacing-3);
        font-size: var(--font-size-xs);
        white-space: nowrap;
    }

    .modal {
        width: 100%;
        max-width: 100%;
        height: 100%;
        max-height: 100%;
        border-radius: 0;
        top: 0;
        left: 0;
        transform: translate(0, 0);
    }

    .modal-open {
        transform: translate(0, 0);
    }

    .modal-header {
        padding: var(--spacing-4);
    }

    .modal-body {
        padding: var(--spacing-4);
    }

    .modal-footer {
        padding: var(--spacing-4);
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
    }

    .stat-card {
        padding: var(--spacing-4);
    }

    .stat-value {
        font-size: var(--font-size-2xl);
    }

    .grid-cols-1,
    .grid-cols-2,
    .grid-cols-3,
    .grid-cols-4 {
        grid-template-columns: 1fr;
    }

    .dashboard-header {
        padding: var(--spacing-3) var(--spacing-4);
    }

    .dashboard-brand-text {
        font-size: var(--font-size-base);
    }

    .dashboard-main {
        padding: var(--spacing-4);
    }

    .dashboard-page-title {
        font-size: var(--font-size-xl);
    }

    .dashboard-filters {
        flex-direction: column;
        padding: var(--spacing-4);
    }

    .dashboard-search {
        width: 100%;
        max-width: 100%;
    }

    .dashboard-actions {
        width: 100%;
        flex-direction: column;
    }

    .dashboard-actions .btn {
        width: 100%;
    }

    .dashboard-pagination {
        flex-direction: column;
        gap: var(--spacing-3);
        padding: var(--spacing-4);
    }

    .login-container {
        padding: var(--spacing-4);
        align-items: flex-start;
        padding-top: var(--spacing-8);
    }

    .login-card {
        padding: var(--spacing-6);
    }

    .login-logo {
        flex-direction: column;
        gap: var(--spacing-2);
    }

    .login-options {
        flex-direction: column;
        gap: var(--spacing-3);
        align-items: flex-start;
    }

    .login-social {
        flex-direction: column;
    }

    .hidden-mobile {
        display: none !important;
    }

    .visible-mobile {
        display: block !important;
    }

    .touch-target {
        min-width: 44px;
        min-height: 44px;
    }

    .touch-target-pad {
        padding: var(--spacing-3);
    }

    .swipe-back {
        touch-action: pan-right;
    }

    .scrollable-h {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .scrollable-h::-webkit-scrollbar {
        display: none;
    }

    .bottom-sheet {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        max-height: 90vh;
        border-radius: var(--radius-xl) var(--radius-xl) 0 0;
        transform: translateY(100%);
        transition: transform var(--transition-normal);
        z-index: var(--z-modal);
    }

    .bottom-sheet-open {
        transform: translateY(0);
    }

    .bottom-sheet-backdrop {
        position: fixed;
        inset: 0;
        background-color: rgba(0, 0, 0, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-normal), visibility var(--transition-normal);
    }

    .bottom-sheet-backdrop-open {
        opacity: 1;
        visibility: visible;
    }

    .mobile-nav {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background-color: var(--color-surface);
        border-top: 1px solid var(--color-border);
        display: flex;
        justify-content: space-around;
        padding: var(--spacing-2) 0;
        padding-bottom: calc(var(--spacing-2) + env(safe-area-inset-bottom, 0));
        z-index: var(--z-fixed);
    }

    .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-1);
        padding: var(--spacing-2);
        color: var(--color-text-secondary);
        font-size: var(--font-size-xs);
        transition: color var(--transition-fast);
    }

    .mobile-nav-item-active {
        color: var(--color-primary);
    }

    .mobile-nav-item svg {
        width: 24px;
        height: 24px;
    }

    .mobile-header {
        position: sticky;
        top: 0;
        background-color: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: var(--spacing-3) var(--spacing-4);
        display: flex;
        align-items: center;
        justify-content: space-between;
        z-index: var(--z-sticky);
    }

    .mobile-header-title {
        font-size: var(--font-size-lg);
        font-weight: var(--font-weight-semibold);
    }

    .mobile-back {
        display: flex;
        align-items: center;
        gap: var(--spacing-2);
        padding: var(--spacing-2);
        margin-left: calc(var(--spacing-2) * -1);
        color: var(--color-text);
        font-size: var(--font-size-sm);
    }

    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border: none;
        background: transparent;
        color: var(--color-text);
        cursor: pointer;
    }

    .mobile-action-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        position: fixed;
        bottom: calc(60px + var(--spacing-4));
        right: var(--spacing-4);
        width: 56px;
        height: 56px;
        border-radius: var(--radius-full);
        background-color: var(--color-primary);
        color: white;
        box-shadow: var(--shadow-lg);
        border: none;
        cursor: pointer;
        z-index: var(--z-fixed);
        transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    }

    .mobile-action-btn:hover {
        transform: scale(1.05);
        box-shadow: var(--shadow-xl);
    }

    .mobile-action-btn:active {
        transform: scale(0.95);
    }

    .mobile-card-list {
        display: flex;
        flex-direction: column;
        gap: var(--spacing-3);
    }

    .mobile-card-item {
        display: flex;
        align-items: center;
        gap: var(--spacing-3);
        padding: var(--spacing-4);
        background-color: var(--color-surface);
        border-radius: var(--radius-lg);
        border: 1px solid var(--color-border-light);
        cursor: pointer;
        transition: all var(--transition-fast);
    }

    .mobile-card-item:active {
        background-color: var(--color-background);
    }

    .mobile-card-icon {
        width: 44px;
        height: 44px;
        border-radius: var(--radius-md);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }

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

    .mobile-card-title {
        font-size: var(--font-size-sm);
        font-weight: var(--font-weight-medium);
        color: var(--color-text);
    }

    .mobile-card-subtitle {
        font-size: var(--font-size-xs);
        color: var(--color-text-secondary);
        margin-top: var(--spacing-1);
    }

    .mobile-card-arrow {
        color: var(--color-text-muted);
    }

    .toast-mobile {
        position: fixed;
        bottom: calc(80px + var(--spacing-4));
        left: var(--spacing-4);
        right: var(--spacing-4);
        padding: var(--spacing-3) var(--spacing-4);
        background-color: var(--color-text);
        color: white;
        border-radius: var(--radius-md);
        font-size: var(--font-size-sm);
        z-index: var(--z-tooltip);
        animation: slideUp 0.3s ease-out;
    }
}

@media (min-width: 768px) {
    .visible-mobile {
        display: none !important;
    }

    .hidden-desktop-mobile {
        display: none !important;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    :root {
        --spacing-6: 1.25rem;
    }

    .tablet-hidden {
        display: none !important;
    }
}

@media (min-width: 1024px) {
    .desktop-hidden {
        display: none !important;
    }
}

@media (hover: none) and (pointer: coarse) {
    :focus-visible {
        outline: 2px solid var(--color-primary);
        outline-offset: 2px;
    }

    .btn:hover {
        transform: none;
    }

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

    .card:hover {
        transform: none;
        box-shadow: var(--shadow-sm);
    }

    .card:active {
        box-shadow: var(--shadow-md);
    }

    .nav-item:hover {
        background-color: transparent;
    }

    .nav-item:active {
        background-color: var(--color-border-light);
    }

    a:hover {
        color: inherit;
    }

    a:active {
        color: var(--color-primary-dark);
    }

    input[type="checkbox"]:hover,
    input[type="radio"]:hover {
        cursor: pointer;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media (prefers-contrast: more) {
    :root {
        --color-border: #000000;
        --color-text: #000000;
        --color-text-secondary: #333333;
    }

    .btn {
        border: 2px solid currentColor;
    }

    .card {
        border-width: 2px;
    }

    .form-input,
    .form-select {
        border-width: 2px;
    }
}

@supports (padding: max(0px)) {
    .mobile-nav {
        padding-bottom: max(var(--spacing-2), env(safe-area-inset-bottom));
    }

    .login-container {
        padding-bottom: max(var(--spacing-4), env(safe-area-inset-bottom));
    }
}