/* ================================================================
   responsive.css  --  All @media queries
   Mobile (≤768), medium (769-1024), large (≥1025),
   touch devices, extra-small (≤480), modal breakpoints
   ================================================================ */

/* ========== MOBILE  (max-width: 768px) ========== */

@media (max-width: 768px) {

  /* --- Layout --- */

  .wrap {
    padding: 16px;
  }

  header {
    flex-wrap: wrap;
    gap: 8px;
  }

  h1 {
    font-size: 18px;
  }

  .btn, .iconbtn {
    min-height: 44px;
    padding: 10px 14px;
  }

  .crumbs {
    font-size: 12px;
  }

  .crumbs .crumb {
    padding: 6px 10px;
  }

  /* --- Folder grid --- */

  .folders {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .folder {
    grid-template-rows: 100px auto;
  }

  .folder .thumb img {
    width: 50%;
    max-height: 80px;
  }

  .folder .meta {
    padding: 8px 10px;
    font-size: 11px;
  }

  .folder .name {
    font-size: 12px;
  }

  .folder .count {
    font-size: 10px;
  }

  .folder .metadata-info {
    display: none;
  }

  .folder.row-view .thumb {
    width: 40px;
    height: 32px;
  }

  .folder.row-view .name {
    font-size: 11px;
  }

  .folder.row-view .count {
    font-size: 9px;
    min-width: 60px;
  }

  .folder-metadata-panel {
    margin: 16px 0 24px 0;
    max-height: 300px;
    overflow-y: auto;
  }

  .metadata-grid {
    padding: 12px;
    gap: 10px;
  }

  .metadata-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .metadata-label {
    font-size: 12px;
    color: #9ca3af;
  }

  .metadata-value {
    font-size: 12px;
    margin-left: 12px;
  }

  /* --- Image gallery --- */

  .gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .caption {
    font-size: 11px;
    padding: 8px 10px;
  }

  .card.row-view button {
    width: 40px;
    height: 32px;
  }

  .card.row-view .filename {
    font-size: 11px;
  }

  .card.row-view .dimensions,
  .card.row-view .file-size,
  .card.row-view .last-modified {
    font-size: 9px;
  }

  .view-switcher {
    font-size: 10px;
    padding: 6px 10px;
  }

  /* --- Lightbox --- */

  .lightbox {
    flex-direction: column;
    overflow: auto;
  }

  .lb-top {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 8px 10px;
    height: auto;
    max-height: 80px;
    flex-wrap: wrap;
    gap: 6px;
    z-index: 9995;
    overflow: hidden;
  }

  .lb-top-content {
    gap: 6px;
    width: 100%;
    display: flex;
    flex-direction: column;
  }

  .lb-buttons-row {
    flex-wrap: wrap;
    gap: 6px;
    width: 100%;
  }

  .lb-title {
    font-size: 12px;
    flex: 1 1 auto;
    margin-bottom: 0;
  }

  .lb-buttons-left {
    flex-wrap: wrap;
    gap: 6px;
    width: 100%;
  }

  .lb-controls {
    gap: 6px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
  }

  .iconbtn {
    font-size: 11px;
    padding: 4px 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
  }

  .linkbtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
  }

  .swap-folder-btn {
    font-size: 10px !important;
    padding: 4px 6px !important;
    min-width: auto !important;
    max-width: none !important;
    height: auto !important;
    white-space: nowrap !important;
  }

  /* --- Channel controls (mobile) --- */

  .channel-controls {
    display: flex !important;
    flex-wrap: nowrap;
    gap: 6px;
    padding: 6px 8px;
    order: 2;
    width: auto;
    overflow-x: auto;
    flex-shrink: 1;
    min-width: 0;
  }

  .channel-slider {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    min-width: 0;
  }

  .channel-slider label {
    font-size: 9px;
    min-width: auto;
    white-space: nowrap;
  }

  .slider {
    width: 30px;
    height: 2px;
    min-width: 30px;
  }

  .slider::-webkit-slider-thumb {
    width: 8px;
    height: 8px;
  }

  .channel-slider span {
    font-size: 9px;
    min-width: auto;
    white-space: nowrap;
  }

  .reset-btn {
    font-size: 9px !important;
    padding: 4px 6px !important;
    white-space: nowrap;
  }

  .grayscale-btn {
    font-size: 9px !important;
    padding: 4px 6px !important;
    white-space: nowrap;
  }

  .slider-group {
    display: none !important;
  }

  .rgb-toggle-group {
    display: flex !important;
    gap: 4px;
  }

  /* --- Panel toggle buttons (mobile) --- */

  .metadata-toggle,
  .atlas-toggle,
  .legend-toggle {
    font-size: 10px;
    padding: 4px 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
  }

  /* --- Navigation (bottom) --- */

  .lb-bottom-controls {
    position: fixed;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9994;
    gap: 12px;
    padding: 0 8px;
    max-width: calc(100vw - 32px);
  }

  .zoom-display {
    position: fixed;
    bottom: calc(8px + 32px + 12px);
    left: 50%;
    transform: translateX(-50%);
    z-index: 9994;
  }

  .lb-prev, .lb-next {
    position: relative;
    padding: 8px 12px;
    font-size: 16px;
    background: var(--chrome-bg);
    -webkit-backdrop-filter: blur(var(--chrome-blur));
    backdrop-filter: blur(var(--chrome-blur));
    border: 1px solid #2a2f3a;
    border-radius: 999px;
    min-height: 32px;
    min-width: 32px;
  }

  .lb-counter {
    position: relative;
    font-size: 11px;
    padding: 4px 8px;
  }

  /* --- Brain template drawer (mobile) --- */

  .brain-template-panel {
    position: fixed;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    top: auto;
    width: 90vw;
    max-width: 400px;
    height: auto;
    max-height: 35vh;
    border-radius: 8px 8px 0 0;
    border-left: 1px solid #2a2f3a;
    border-right: 1px solid #2a2f3a;
    border-top: 1px solid #2a2f3a;
    z-index: 9995;
    transition: transform 0.3s ease;
    opacity: 0;
    pointer-events: none;
  }

  .brain-template-panel.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .brain-template-content {
    padding: 8px;
    gap: 8px;
  }

  .brain-template-info h4 {
    font-size: 11px;
    margin-bottom: 4px;
  }

  .brain-position-display {
    font-size: 9px;
  }

  .brain-template-image {
    max-height: 120px;
  }

  .lb-top {
    max-height: 45vh;
  }

  /* --- Stage (mobile) --- */

  .lb-stage {
    position: relative;
    margin-top: 0;
    padding-top: 50px;
    padding-bottom: 100px;
    height: auto;
    min-height: calc(100vh - 100px);
    overflow-y: auto;
  }

  .lb-img {
    max-width: calc(100vw - 16px);
    max-height: calc(100vh - 180px);
  }

  .lb-img.zoomed {
    max-width: calc(100vw - 16px);
    max-height: calc(100vh - 180px);
  }

  /* --- Metadata panel drawer (mobile) --- */

  .metadata-panel {
    position: fixed;
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-height: 60vh;
    overflow-y: auto;
    border-radius: 16px 16px 0 0;
    border: 1px solid #2a2f3a;
    border-bottom: none;
    padding: 12px 16px 20px 16px;
    min-width: auto;
    transform: translateY(100%);
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    z-index: 9998;
  }

  .metadata-panel.visible {
    transform: translateY(0);
    opacity: 1;
  }

  .metadata-panel::before {
    content: "";
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
  }

  .metadata-panel h4 {
    font-size: 11px;
    margin-top: 8px;
  }

  .metadata-row {
    font-size: 10px;
    flex-direction: column;
    gap: 2px;
    margin-bottom: 6px;
  }

  .metadata-label {
    font-size: 9px;
    min-width: auto;
  }

  .metadata-value {
    font-size: 10px;
  }

  #biologicalMetadata {
    display: none !important;
  }

  /* --- Gesture hint --- */

  .gesture-hint {
    display: block;
  }
}

/* ========== MEDIUM SCREENS  (769-1024px) ========== */

@media (min-width: 769px) and (max-width: 1024px) {

  .lb-top {
    padding: 8px 12px;
    max-height: none;
  }

  .lb-buttons-row {
    gap: 6px;
    flex-wrap: wrap;
  }

  .lb-buttons-row:first-child {
    justify-content: flex-start;
  }

  .lb-controls {
    flex-shrink: 0;
    min-width: fit-content;
  }

  .channel-controls {
    flex-wrap: wrap;
  }

  .channel-slider {
    gap: 2px;
  }

  .slider {
    width: 35px;
  }

  .swap-folder-btn {
    min-width: 120px !important;
    max-width: 140px !important;
    font-size: 11px !important;
  }

  .metadata-panel {
    right: 10px;
    left: auto;
    width: calc(100vw - 40px);
    max-width: 250px;
    bottom: auto;
    top: 150px;
    max-height: calc(100vh - 170px);
  }

  .metadata-panel.visible {
    opacity: 1;
    pointer-events: auto;
  }

  .brain-template-panel {
    position: fixed;
    left: 0;
    top: 140px;
    transform: translateX(-100%);
    bottom: auto;
    width: 200px;
    height: auto;
    max-height: calc(100vh - 200px);
    border-left: none;
    border-radius: 0 8px 8px 0;
  }

  .brain-template-panel.visible {
    transform: translateX(0);
  }

  .lb-img {
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 160px);
  }

  .lb-img.zoomed {
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 160px);
  }

  .lb-stage {
    height: auto;
    min-height: calc(100vh - 140px);
    padding: 12px;
    padding-bottom: 60px;
  }
}

/* ========== LARGE SCREENS  (≥1025px) ========== */

@media (min-width: 1025px) {

  .lb-top {
    padding: 12px 20px;
  }

  .brain-template-panel {
    position: fixed;
    left: 0;
    top: 140px;
    transform: translateX(-100%);
    width: 250px;
    height: auto;
    max-height: calc(100vh - 200px);
    border-left: none;
    border-radius: 0 8px 8px 0;
  }

  .brain-template-panel.visible {
    transform: translateX(0);
  }

  .metadata-panel {
    right: 20px;
    left: auto;
    top: 120px;
    max-height: calc(100vh - 140px);
    width: auto;
  }

  .lb-img {
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 150px);
  }

  .lb-img.zoomed {
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 150px);
  }
}

/* ========== TOUCH DEVICES ========== */

@media (hover: none) and (pointer: coarse) {

  .btn, .iconbtn, .metadata-toggle {
    min-height: 44px;
    min-width: 44px;
  }

  .lb-prev, .lb-next {
    min-width: 44px;
    min-height: 44px;
  }

  .lightbox, .lb-img, .lb-top, .metadata-panel {
    -webkit-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
  }

  .card:hover img {
    transform: none;
  }

  .folder:hover {
    transform: none;
  }
}

/* ========== EXTRA-SMALL DEVICES  (≤480px) ========== */

@media (max-width: 480px) {

  .folders:not(.row-view) {
    grid-template-columns: 1fr;
  }

  .gallery:not(.row-view) {
    grid-template-columns: 1fr;
  }

  .channel-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .channel-slider {
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
  }

  .slider {
    flex: 1;
    width: auto;
    margin: 0 10px;
  }

  .metadata-panel .metadata-row:nth-child(n+4) {
    display: none;
  }

  .lb-prev, .lb-next {
    padding: 10px 12px;
    font-size: 16px;
  }

  .gesture-hint {
    font-size: 10px;
    padding: 6px 12px;
  }
}

/* ========== MODAL RESPONSIVE ========== */

@media (max-width: 768px) {

  .readme-modal {
    padding: 10px;
  }

  .readme-modal-content {
    max-height: 95vh;
  }

  .readme-modal-header {
    padding: 16px;
  }

  .readme-modal-header h2 {
    font-size: 18px;
  }

  .readme-modal-body {
    padding: 16px;
  }

  .readme-section {
    margin-bottom: 16px;
  }

  .readme-section h3 {
    font-size: 14px;
  }

  .readme-section li {
    font-size: 13px;
  }

  .video-modal {
    padding: 10px;
  }

  .video-modal-content {
    max-height: 95vh;
  }

  .video-modal-header {
    padding: 12px 16px;
  }

  .video-modal-header h2 {
    font-size: 16px;
  }
}