/* ============================================
   MyPACS V2 - Mobile Responsive Styles
   Mobile-First Design Approach
   ============================================ */

/* ============================================
   CSS Variables for Mobile
   ============================================ */
:root {
    /* Mobile Touch Targets */
    --touch-target-min: 44px;
    --touch-target-comfortable: 48px;
    
    /* Mobile Spacing */
    --mobile-space-xs: 0.25rem;
    --mobile-space-sm: 0.5rem;
    --mobile-space-md: 0.75rem;
    --mobile-space-lg: 1rem;
    --mobile-space-xl: 1.5rem;
    
    /* Mobile Font Sizes */
    --mobile-text-xs: 0.6875rem;  /* 11px */
    --mobile-text-sm: 0.8125rem;  /* 13px */
    --mobile-text-base: 0.9375rem; /* 15px */
    --mobile-text-lg: 1.0625rem;   /* 17px */
    --mobile-text-xl: 1.25rem;     /* 20px */
}

/* ============================================
   Mobile Breakpoints
   ============================================ */

/* Small phones (320px - 375px) */
@media (max-width: 375px) {
    html {
        font-size: 14px;
    }
}

/* Medium phones (376px - 414px) */
@media (min-width: 376px) and (max-width: 414px) {
    html {
        font-size: 15px;
    }
}

/* Large phones (415px - 767px) */
@media (min-width: 415px) and (max-width: 767px) {
    html {
        font-size: 16px;
    }
}

/* ============================================
   Mobile Layout Adjustments
   ============================================ */

@media (max-width: 1023px) {
    /* Hide desktop sidebar, show mobile nav */
    .sidebar.desktop {
        display: none;
    }
    
    /* Mobile navigation bar */
    .mobile-nav {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-color);
        display: flex;
        justify-content: space-around;
        padding: var(--mobile-space-xs) 0;
        z-index: var(--z-fixed);
        padding-bottom: env(safe-area-inset-bottom, 8px);
    }
    
    .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 2px;
        padding: var(--mobile-space-xs) var(--mobile-space-sm);
        color: var(--text-secondary);
        font-size: var(--mobile-text-xs);
        min-width: var(--touch-target-min);
        min-height: var(--touch-target-min);
        justify-content: center;
        border-radius: var(--radius-md);
        transition: all var(--transition-fast);
    }
    
    .mobile-nav-item:active {
        background: var(--bg-tertiary);
    }
    
    .mobile-nav-item.active {
        color: var(--color-primary);
    }
    
    .mobile-nav-item .icon {
        font-size: 1.5rem;
    }
    
    /* Adjust main content for mobile nav */
    .main-content {
        padding-bottom: calc(64px + env(safe-area-inset-bottom, 8px));
    }
    
    /* Mobile header */
    .mobile-header {
        position: sticky;
        top: 0;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border-color);
        padding: var(--mobile-space-md);
        display: flex;
        align-items: center;
        gap: var(--mobile-space-md);
        z-index: var(--z-sticky);
    }
    
    .mobile-header .menu-btn {
        width: var(--touch-target-min);
        height: var(--touch-target-min);
        display: flex;
        align-items: center;
        justify-content: center;
        background: none;
        border: none;
        color: var(--text-primary);
        font-size: 1.5rem;
        border-radius: var(--radius-md);
    }
    
    .mobile-header .menu-btn:active {
        background: var(--bg-tertiary);
    }
    
    .mobile-header h1 {
        font-size: var(--mobile-text-lg);
        flex: 1;
    }
}

/* ============================================
   Mobile Forms
   ============================================ */

@media (max-width: 767px) {
    .form-input,
    .form-select,
    .form-textarea {
        min-height: var(--touch-target-comfortable);
        font-size: var(--mobile-text-base);
        padding: var(--mobile-space-md);
    }
    
    /* Prevent zoom on iOS */
    @supports (-webkit-touch-callout: none) {
        .form-input,
        .form-select,
        .form-textarea {
            font-size: 16px; /* Prevents iOS zoom */
        }
    }
    
    .btn {
        min-height: var(--touch-target-comfortable);
        padding: var(--mobile-space-md) var(--mobile-space-lg);
        font-size: var(--mobile-text-base);
    }
    
    .btn-lg {
        padding: var(--mobile-space-lg);
        font-size: var(--mobile-text-lg);
    }
}

/* ============================================
   Mobile Tables (Convert to Cards)
   ============================================ */

@media (max-width: 767px) {
    .data-table-responsive {
        border: none;
        background: transparent;
    }
    
    .data-table-responsive thead {
        display: none;
    }
    
    .data-table-responsive tbody tr {
        display: block;
        background: var(--bg-secondary);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        margin-bottom: var(--mobile-space-md);
        padding: var(--mobile-space-md);
    }
    
    .data-table-responsive tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: var(--mobile-space-sm) 0;
        border-bottom: 1px solid var(--border-color-light);
    }
    
    .data-table-responsive tbody td:last-child {
        border-bottom: none;
    }
    
    .data-table-responsive tbody td::before {
        content: attr(data-label);
        font-weight: var(--font-semibold);
        color: var(--text-secondary);
        font-size: var(--mobile-text-sm);
    }
}

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

@media (max-width: 767px) {
    .card {
        margin-left: calc(-1 * var(--mobile-space-md));
        margin-right: calc(-1 * var(--mobile-space-md));
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
    
    .card-body {
        padding: var(--mobile-space-md);
    }
    
    .card-header,
    .card-footer {
        padding: var(--mobile-space-md);
    }
}

/* ============================================
   Mobile Modals (Full Screen)
   ============================================ */

@media (max-width: 767px) {
    .modal-backdrop {
        align-items: flex-end;
    }
    
    .modal {
        max-width: 100%;
        width: 100%;
        max-height: 90vh;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        animation: slideUpMobile 0.3s ease;
    }
    
    @keyframes slideUpMobile {
        from {
            transform: translateY(100%);
        }
        to {
            transform: translateY(0);
        }
    }
    
    .modal-header {
        position: sticky;
        top: 0;
        background: var(--bg-secondary);
        z-index: 1;
    }
    
    /* Swipe indicator for mobile modals */
    .modal::before {
        content: '';
        display: block;
        width: 40px;
        height: 4px;
        background: var(--border-color);
        border-radius: 2px;
        margin: 8px auto;
    }
}

/* ============================================
   Mobile Toasts
   ============================================ */

@media (max-width: 767px) {
    .toast-container {
        left: var(--mobile-space-md);
        right: var(--mobile-space-md);
        top: auto;
        bottom: calc(80px + env(safe-area-inset-bottom, 8px));
    }
    
    .toast {
        width: 100%;
    }
}

/* ============================================
   Mobile Filters
   ============================================ */

@media (max-width: 767px) {
    .filters-bar {
        flex-direction: column;
        gap: var(--mobile-space-md);
    }
    
    .search-box {
        min-width: auto;
        width: 100%;
    }
    
    .filter-group {
        width: 100%;
        flex-wrap: wrap;
    }
    
    .filter-group select {
        flex: 1;
        min-width: 100px;
    }
}

/* ============================================
   Mobile Pagination
   ============================================ */

@media (max-width: 767px) {
    .pagination {
        flex-wrap: wrap;
        gap: var(--mobile-space-xs);
    }
    
    .pagination button {
        min-width: 36px;
        height: 36px;
        padding: var(--mobile-space-xs);
    }
}

/* ============================================
   Mobile Touch Optimizations
   ============================================ */

@media (pointer: coarse) {
    /* Larger touch targets for touch devices */
    .nav-item,
    .btn,
    .form-input,
    .form-select,
    .card,
    .study-card {
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }
    
    /* Remove hover effects on touch devices */
    .nav-item:hover,
    .btn:hover,
    .study-card:hover {
        transform: none;
    }
    
    /* Add active states */
    .nav-item:active,
    .btn:active,
    .study-card:active {
        opacity: 0.8;
        transform: scale(0.98);
    }
    
    /* Disable text selection on interactive elements */
    .btn,
    .nav-item,
    .tool-btn,
    .mobile-nav-item {
        user-select: none;
        -webkit-user-select: none;
    }
}

/* ============================================
   Mobile Safe Areas (Notch Support)
   ============================================ */

@supports (padding-top: env(safe-area-inset-top)) {
    .mobile-header {
        padding-top: calc(var(--mobile-space-md) + env(safe-area-inset-top));
    }
    
    .sidebar {
        padding-top: calc(var(--mobile-space-lg) + env(safe-area-inset-top));
    }
}

/* ============================================
   Mobile Landscape
   ============================================ */

@media (max-height: 500px) and (orientation: landscape) {
    .mobile-nav {
        display: none;
    }
    
    .main-content {
        padding-bottom: var(--mobile-space-md);
    }
    
    /* Compact header in landscape */
    .mobile-header {
        padding: var(--mobile-space-sm) var(--mobile-space-md);
    }
}

/* ============================================
   Mobile Pull-to-Refresh Indicator
   ============================================ */

.ptr-indicator {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    transform: translateY(-100%);
    transition: transform 0.2s;
    z-index: var(--z-sticky);
}

.ptr-indicator.visible {
    transform: translateY(0);
}

.ptr-indicator .spinner {
    width: 20px;
    height: 20px;
}

/* ============================================
   Mobile Floating Action Button (FAB)
   ============================================ */

.fab {
    position: fixed;
    bottom: calc(80px + env(safe-area-inset-bottom, 8px));
    right: var(--mobile-space-lg);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    border: none;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: var(--z-fixed);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.fab:active {
    transform: scale(0.95);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Mobile Search Overlay
   ============================================ */

.mobile-search-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.mobile-search-overlay.active {
    transform: translateY(0);
}

.mobile-search-header {
    display: flex;
    align-items: center;
    gap: var(--mobile-space-md);
    padding: var(--mobile-space-md);
    padding-top: calc(var(--mobile-space-md) + env(safe-area-inset-top, 0));
    border-bottom: 1px solid var(--border-color);
}

.mobile-search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: var(--mobile-text-lg);
    color: var(--text-primary);
    outline: none;
}

.mobile-search-results {
    flex: 1;
    overflow-y: auto;
    padding: var(--mobile-space-md);
}

/* ============================================
   Mobile Skeleton Loading
   ============================================ */

@media (max-width: 767px) {
    .skeleton {
        background: linear-gradient(
            90deg,
            var(--bg-tertiary) 25%,
            var(--bg-elevated) 50%,
            var(--bg-tertiary) 75%
        );
        background-size: 200% 100%;
        animation: shimmer 1s infinite;
    }
    
    .skeleton-card {
        height: 200px;
        border-radius: var(--radius-lg);
        margin-bottom: var(--mobile-space-md);
    }
    
    .skeleton-text {
        height: 16px;
        border-radius: var(--radius-sm);
        margin-bottom: var(--mobile-space-sm);
    }
    
    .skeleton-text.short {
        width: 60%;
    }
}

/* ============================================
   Mobile Viewport Height Fix
   ============================================ */

/* Fix for mobile viewport height issues with browser chrome */
@supports (height: 100dvh) {
    .app-layout,
    .viewer-container,
    .login-page {
        height: 100dvh;
    }
}

/* Fallback for older browsers */
@supports not (height: 100dvh) {
    .app-layout,
    .viewer-container,
    .login-page {
        height: 100vh;
        height: calc(var(--vh, 1vh) * 100);
    }
}

/* ============================================
   Mobile Print Styles
   ============================================ */

@media print and (max-width: 767px) {
    .mobile-nav,
    .mobile-header,
    .fab,
    .filters-bar {
        display: none !important;
    }
    
    .main-content {
        padding: 0;
        padding-bottom: 0;
    }
}