/* =====================
   TABLET STYLES 
   ===================== */
@media (max-width: 1024px) {
    .file-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 20px;
    }
    
    .container {
        margin: 15px;
        border-radius: 25px;
    }
    
    .header h1 {
        font-size: 2.5rem;
    }
    
    .content {
        padding: 30px;
    }
    
    .navigation-bar {
        gap: 12px;
    }
    
    .file-item {
        padding: 20px;
    }
}

/* =====================
   MOBILE STYLES 
   ===================== */
@media (max-width: 768px) {
    /* Layout */
    body {
        padding: 10px;
    }
    
    .container {
        margin: 10px;
        border-radius: 20px;
    }
    
    .header {
        padding: 30px 20px;
    }
    
    .header h1 {
        font-size: 2rem;
        margin-bottom: 10px;
    }
    
    .header p {
        font-size: 1rem;
    }
    
    .header .domain-badge {
        font-size: 0.8rem;
        padding: 6px 16px;
        margin-top: 10px;
    }
    
    .content {
        padding: 20px;
    }
    
    /* Navigation */
    .navigation-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 15px;
    }
    
    .breadcrumb-container {
        order: 2;
        padding: 12px 16px;
    }
    
    .breadcrumb {
        font-size: 0.8rem;
    }
    
    .action-buttons {
        order: 1;
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .nav-btn, .upload-btn, .refresh-btn {
        padding: 10px 16px;
        font-size: 0.85rem;
        min-width: 120px;
    }
    
    /* File Grid */
    .file-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .file-item {
        padding: 20px;
        border-radius: 16px;
    }
    
    .file-item:hover {
        transform: translateY(-4px) scale(1.01);
    }
    
    .file-name {
        font-size: 1rem;
        margin-bottom: 12px;
    }
    
    .file-meta {
        font-size: 0.8rem;
        margin-bottom: 15px;
    }
    
    .file-actions {
        gap: 6px;
    }
    
    .btn {
        padding: 6px 12px;
        font-size: 0.75rem;
        border-radius: 16px;
    }
    
    /* Upload */
    .upload-drop-zone {
        padding: 30px 20px;
        border-radius: 16px;
    }
    
    .upload-drop-zone h3 {
        font-size: 1.1rem;
        margin-bottom: 12px;
    }
    
    .upload-drop-zone p {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }
    
    .select-files-btn {
        padding: 10px 20px;
        font-size: 0.85rem;
    }
    
    /* Upload Progress */
    .upload-progress {
        padding: 15px;
        border-radius: 12px;
    }
    
    .upload-file-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 15px 0;
    }
    
    .upload-file-info {
        width: 100%;
        justify-content: space-between;
    }
    
    .upload-progress-bar {
        width: 100%;
        margin: 5px 0;
    }
    
    .upload-status {
        align-self: flex-end;
    }
    
    /* Modals */
    .modal-content {
        margin: 10% auto;
        padding: 25px 20px;
        border-radius: 20px;
        width: 95%;
    }
    
    .modal h3 {
        font-size: 1.2rem;
        margin-bottom: 20px;
    }
    
    .modal input, .modal textarea {
        padding: 12px;
        font-size: 14px;
        margin-bottom: 15px;
    }
    
    .modal-actions {
        flex-direction: column-reverse;
        gap: 10px;
    }
    
    .modal-btn {
        padding: 12px 20px;
        width: 100%;
        justify-content: center;
    }
    
    .code-block {
        padding: 15px;
        font-size: 12px;
        border-radius: 8px;
    }
    
    /* Loading & Error States */
    .loading, .error {
        padding: 60px 20px;
    }
    
    .loading h3, .error h3 {
        font-size: 1.2rem;
    }
    
    .loading p, .error p {
        font-size: 0.9rem;
    }
    
    .loading-spinner {
        width: 40px;
        height: 40px;
        margin: 0 auto 20px;
    }
    
    /* Empty State */
    .empty-state {
        padding: 40px 20px;
    }
    
    .empty-state-icon {
        font-size: 3rem;
        margin-bottom: 15px;
    }
    
    .empty-state h3 {
        font-size: 1.1rem;
        margin-bottom: 8px;
    }
    
    .empty-state p {
        font-size: 0.9rem;
    }
}

/* =====================
   SMALL MOBILE STYLES 
   ===================== */
@media (max-width: 480px) {
    .container {
        margin: 5px;
        border-radius: 16px;
    }
    
    .header {
        padding: 20px 15px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .content {
        padding: 15px;
    }
    
    .breadcrumb-container {
        padding: 10px 12px;
    }
    
    .action-buttons {
        gap: 8px;
    }
    
    .nav-btn, .upload-btn, .refresh-btn {
        padding: 8px 12px;
        min-width: 100px;
        font-size: 0.8rem;
    }
    
    .file-item {
        padding: 15px;
    }
    
    .file-icon-container {
        width: 50px;
        height: 50px;
        margin-bottom: 15px;
    }
    
    .file-icon {
        font-size: 24px;
    }
    
    .upload-drop-zone {
        padding: 20px 15px;
    }
    
    .modal-content {
        padding: 20px 15px;
    }
    
    /* Floating particles - reduce on small screens */
    .particle {
        opacity: 0.5;
    }
    
    .particle:nth-child(3) {
        display: none;
    }
}

/* =====================
   LANDSCAPE ORIENTATION 
   ===================== */
@media (max-width: 768px) and (orientation: landscape) {
    .header {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 1.8rem;
        margin-bottom: 8px;
    }
    
    .header p {
        font-size: 0.9rem;
    }
    
    .content {
        padding: 20px;
    }
    
    .navigation-bar {
        flex-direction: row;
        align-items: center;
    }
    
    .breadcrumb-container {
        order: 1;
        flex: 1;
    }
    
    .action-buttons {
        order: 2;
        flex: none;
    }
}

/* =====================
   HIGH DPI DISPLAYS 
   ===================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .file-icon-container, .loading-spinner {
        transform: translateZ(0);
        backface-visibility: hidden;
    }
}

/* =====================
   TOUCH DEVICE OPTIMIZATIONS 
   ===================== */
@media (hover: none) and (pointer: coarse) {
    .file-item:hover {
        transform: none;
        box-shadow: none;
        border-color: transparent;
    }
    
    .file-item:hover::before {
        opacity: 0;
    }
    
    .file-item:hover .file-icon {
        transform: none;
    }
    
    .file-item:active {
        transform: scale(0.98);
    }
    
    .btn:hover {
        transform: none;
        box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    }
    
    .btn:active {
        transform: scale(0.95);
    }
    
    /* Increase touch targets */
    .breadcrumb-item {
        padding: 8px 12px;
    }
    
    .file-actions .btn {
        padding: 10px 16px;
        font-size: 0.8rem;
    }
}

/* =====================
   REDUCED MOTION 
   ===================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .floating-particles {
        display: none;
    }
    
    .header::before {
        animation: none;
    }
    
    .loading-spinner {
        animation: none;
        border: 4px solid #667eea;
    }
}