/* ============================================
   ProxyHub - Responsive Styles
   ============================================ */

/* ---- Tablet (768px - 1023px) ---- */
@media (max-width: 1023px) {
  .converter-grid.has-output {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---- Mobile (< 768px) ---- */
@media (max-width: 767px) {
  :root {
    --container-padding: 1rem;
  }
  
  .main-container {
    padding-top: 3.5rem;
  }
  
  /* Site Header */
  .site-title {
    font-size: 1.75rem;
  }
  
  .site-subtitle {
    font-size: 0.875rem;
  }
  
  /* Nav Tabs - centered when fits, scrollable when overflow */
  .nav-tabs {
    display: flex;
    justify-content: center;
    gap: 0.375rem;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding: 0 0.25rem 0.5rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    /* When content overflows, switch to left-aligned scroll */
    position: relative;
  }
  
  /* Apply mask only when scrolled */
  .nav-tabs.has-scroll {
    mask-image: linear-gradient(to right, black 85%, transparent 100%);
    -webkit-mask-image: linear-gradient(to right, black 85%, transparent 100%);
  }
  
  .nav-tabs::-webkit-scrollbar {
    display: none;
  }
  
  .nav-tab {
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    white-space: nowrap;
    flex-shrink: 0;
  }
  
  /* Stats - 3x2 grid */
  .stats-bar {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
  }
  
  .stat-card {
    padding: 0.75rem;
  }
  
  .stat-value {
    font-size: 1.25rem;
  }
  
  .stat-label {
    font-size: 0.6875rem;
  }
  
  /* Converter Grid */
  .converter-grid,
  .converter-grid.has-output {
    grid-template-columns: 1fr;
  }
  
  /* Panel */
  .panel-body {
    padding: 1rem;
  }
  
  /* Form Row */
  .form-row {
    grid-template-columns: 1fr;
  }
  
  /* Client Tabs - scrollable */
  .client-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  
  .client-tabs::-webkit-scrollbar {
    display: none;
  }
  
  .client-tab {
    flex-shrink: 0;
    white-space: nowrap;
  }
  
  /* Features - 1 column */
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .feature-card {
    padding: 1.25rem;
  }
  
  /* Steps - 1 column */
  .steps-grid {
    grid-template-columns: 1fr;
  }
  
  .step-card {
    padding: 1.25rem;
  }
  
  /* Latency Row */
  .latency-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  .latency-threshold {
    width: 100%;
  }
  
  /* Action Buttons */
  .action-buttons {
    flex-direction: column;
  }
  
  .action-buttons .btn-primary,
  .action-buttons .btn-secondary {
    width: 100%;
  }
  
  /* Node List */
  .node-list {
    max-height: 200px;
  }
  
  .node-item {
    flex-wrap: wrap;
    gap: 0.375rem;
  }
  
  .node-name {
    order: 3;
    width: 100%;
    min-width: auto;
  }
  
  .node-address {
    order: 2;
    flex: 1;
  }
  
  .node-latency {
    order: 4;
  }
  
  /* Modal */
  .modal-content {
    max-height: 95vh;
    margin: 0.5rem;
  }
  
  .modal-body {
    padding: 1rem;
  }
  
  /* Settings */
  .settings-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  .slider-control {
    width: 100%;
    justify-content: space-between;
  }
  
  .slider {
    flex: 1;
    max-width: none;
  }
  
  .toggle-row {
    flex-direction: row;
    align-items: center;
  }
  
  /* Top Actions */
  .top-actions {
    top: 0.5rem;
    right: 0.5rem;
  }
  
  .top-action-btn {
    width: 2.25rem;
    height: 2.25rem;
  }
  
  /* Footer */
  .footer-links {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  
  /* Upload Zone */
  .upload-zone {
    padding: 1rem;
  }
  
  /* Checkbox Row */
  .checkbox-row {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  /* Textarea - larger height to avoid internal scrollbar */
  .form-textarea {
    min-height: 120px;
    resize: none;
  }
  
  .form-textarea.node-textarea {
    min-height: 160px;
  }
  
  /* Preview Area */
  .preview-area {
    max-height: 200px;
  }
}

/* ---- Small Mobile (< 480px) ---- */
@media (max-width: 479px) {
  .site-title {
    font-size: 1.5rem;
  }
  
  .site-logo {
    width: 2rem;
    height: 2rem;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stat-value {
    font-size: 1.125rem;
  }
  
  .panel-header {
    padding: 0.875rem 1rem;
  }
  
  .panel-body {
    padding: 0.875rem;
  }
  
  .feature-icon-wrap {
    width: 2.75rem;
    height: 2.75rem;
    font-size: 1.25rem;
  }
  
  .modal-footer {
    flex-direction: column;
  }
  
  .modal-footer .btn-primary,
  .modal-footer .btn-secondary {
    width: 100%;
  }
}

/* ---- Large Desktop (>= 1280px) ---- */
@media (min-width: 1280px) {
  .converter-grid.has-output {
    grid-template-columns: 1fr 1fr;
  }
  
  .main-container {
    padding-top: 5rem;
  }
}

/* ---- Touch Device Optimizations ---- */
@media (hover: none) {
  .glass-card:hover {
    transform: none;
    box-shadow: var(--shadow-md);
  }
  
  .top-action-btn:hover {
    transform: none;
  }
  
  .btn-primary:hover,
  .btn-secondary:hover {
    transform: none;
  }
}