*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  .dropdown-item {
    text-decoration: none;
    color: inherit;
  }
  :root {
    --bg: #f5f4f0;
    --text: #1a1a1a;
    --muted: #888;
    --subtle: #bbb;
    --border: #e0dedd;
    --active: #e8e6e1;
  }

  body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-size: 14px;
    line-height: 1.6;
  }

  nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 32px;
    position: relative;
  }

  .site-title {
    font-size: 12px;
    font-weight: 400;
    letter-spacing: .08em;
    color: var(--muted);
    text-transform: uppercase;
  }

  .settings-wrap {
    position: relative;
  }

  #settings-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 12px;
    color: var(--muted);
    letter-spacing: .06em;
    text-transform: uppercase;
    padding: 6px 10px;
    transition: color .2s;
  }

  #settings-btn:hover {
    color: var(--text);
  }

  .dropdown {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 4px);
    background: var(--bg);
    border: 1px solid var(--border);
    min-width: 230px;
    z-index: 100;
    padding: 6px 0;
  }

  .dropdown.open {
    display: block;
  }

  .dropdown-section {
    padding: 4px 0;
    border-bottom: 1px solid var(--border);
  }

  .dropdown-section:last-child {
    border-bottom: none;
  }

  .dropdown-label {
    font-size: 10px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--subtle);
    padding: 6px 16px 4px;
  }

  .dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    background: none;
    border: none;
    font-family: inherit;
    font-size: 13px;
    color: var(--text);
    padding: 8px 16px;
    cursor: pointer;
    text-align: left;
    transition: background .15s;
  }

  .dropdown-item:hover {
    background: var(--active);
  }

  .dropdown-item.active {
    background: var(--active);
  }

  .check {
    width: 14px;
    height: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    opacity: 0;
    flex-shrink: 0;
  }

  .dropdown-item.active .check {
    opacity: 1;
  }

  main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 32px 60px;
  }

  .artwork-container {
    width: 100%;
    max-width: 860px;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .stage {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: opacity .35s ease;
  }

  .stage.fading {
    opacity: 0;
    pointer-events: none;
  }

  .load-panel {
    width: 100%;
    min-height: 420px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    position: relative;
  }

  .load-panel.hidden {
    display: none;
  }

  .progress-track {
    width: 220px;
    height: 1px;
    background: var(--border);
    position: relative;
    overflow: hidden;
  }

  .progress-bar {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 0%;
    background: var(--muted);
    transition: width .3s ease;
  }

  .load-status {
    font-size: 11px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--subtle);
    min-height: 16px;
    text-align: center;
  }

  @keyframes scan {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(500%); }
  }

  .scan-line {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 20%;
    background: linear-gradient(90deg, transparent, var(--muted), transparent);
    animation: scan 1.4s ease-in-out infinite;
    opacity: 0;
    transition: opacity .3s;
  }

  .progress-track.scanning .scan-line {
    opacity: 1;
  }

  .progress-track.scanning .progress-bar {
    transition: none;
  }

  .img-wrap {
    width: 100%;
    display: flex;
    justify-content: center;
    position: relative;
  }

  #artwork-img {
    max-height: 76vh;
    max-width: 100%;
    object-fit: contain;
    display: block;
    opacity: 0;
    transition: opacity .5s ease;
    filter: blur(12px);
  }

  #artwork-img.decoding {
    opacity: 1;
    filter: blur(12px);
  }

  #artwork-img.visible {
    opacity: 1;
    filter: blur(0);
    transition: opacity .5s ease, filter .6s ease;
  }

  .credit {
    margin-top: 14px;
    font-size: 11px;
    color: var(--subtle);
    letter-spacing: .04em;
  }

  #read-more-btn {
    background: none;
    border: none;
    font-family: inherit;
    font-size: 12px;
    color: var(--muted);
    cursor: pointer;
    margin-top: 16px;
    padding: 4px 0;
    opacity: .55;
    transition: opacity .2s;
    letter-spacing: .04em;
  }

  #read-more-btn:hover {
    opacity: 1;
  }

  #metadata {
    display: none;
    margin-top: 28px;
    width: 100%;
    max-width: 480px;
    text-align: center;
  }

  #metadata.visible {
    display: block;
  }

  .meta-title {
    font-size: 19px;
    font-weight: 400;
    color: var(--text);
    margin-bottom: 10px;
    line-height: 1.4;
  }

  .meta-artist {
    font-size: 13px;
    font-weight: 300;
    color: var(--muted);
    margin-bottom: 4px;
  }

  .meta-date {
    font-size: 12px;
    color: var(--subtle);
    margin-bottom: 4px;
  }

  .meta-dept {
    font-size: 11px;
    color: var(--subtle);
    letter-spacing: .06em;
    text-transform: uppercase;
    margin-bottom: 20px;
  }

  .meta-link {
    font-size: 11px;
    color: var(--muted);
    text-decoration: none;
    letter-spacing: .06em;
    text-transform: uppercase;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1px;
    transition: color .2s;
  }

  .meta-link:hover {
    color: var(--text);
  }

  /* ── Autoplay countdown bar ── */
  .autoplay-bar-wrap {
    width: 100%;
    max-width: 260px;
    margin-top: 18px;
    height: 2px;
    background: var(--border);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transition: opacity .4s;
  }

  .autoplay-bar-wrap.active {
    opacity: 1;
  }

  .autoplay-bar-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: var(--muted);
    transform-origin: left center;
    transform: scaleX(1);
  }

  .autoplay-bar-fill.running {
    transition: transform linear;
  }

  .controls {
    margin-top: 36px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .btn-row {
    display: flex;
    gap: 12px;
    align-items: center;
  }

  .ctrl-btn {
    background: none;
    border: 1px solid var(--border);
    font-family: inherit;
    font-size: 11px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 10px 28px;
    cursor: pointer;
    transition: border-color .2s, color .2s;
  }

  .ctrl-btn:hover {
    border-color: #bbb;
    color: var(--text);
  }

  .ctrl-btn:disabled {
    opacity: .4;
    cursor: default;
  }

  .hint-wrap {
    min-height: 24px;
    overflow: visible;
    position: relative;
    width: 100%;
    max-width: 500px;
    text-align: center;
  }

  .hint {
    position: relative;
    width: 100%;
    text-align: center;
    font-size: 11px;
    color: var(--subtle);
    letter-spacing: .04em;
    opacity: 0;
    transition: opacity .5s ease, transform .5s ease;
    transform: translateY(6px);
  }

  .hint.active {
    opacity: 1;
    transform: translateY(0);
  }

  .hint.exit {
    opacity: 0;
    transform: translateY(-6px);
  }

  .explore-more {
    margin-top: 32px;
    text-align: center;
    opacity: 0.8;
    transition: opacity 0.3s ease;
  }

  .explore-more:hover {
    opacity: 1;
  }

  .explore-more p {
    font-size: 12px;
    color: var(--subtle);
    margin-bottom: 12px;
    letter-spacing: 0.04em;
  }

  .explore-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    max-width: 400px;
    margin: 0 auto;
  }

  .explore-btn {
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 11px;
    color: var(--subtle);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    white-space: nowrap;
  }

  .explore-btn:hover {
    border-color: var(--text);
    color: var(--text);
    transform: translateY(-1px);
  }

  .explore-btn:disabled {
    opacity: 0.4;
    cursor: default;
    transform: none;
  }

  @media (max-width: 600px) {
    .explore-buttons {
      max-width: 300px;
    }
    
    .explore-btn {
      font-size: 10px;
      padding: 5px 10px;
    }
  }

  #error-msg {
    display: none;
    color: var(--subtle);
    font-size: 12px;
    margin-top: 24px;
    text-align: center;
  }

  @media (max-width: 600px) {
    nav  { padding: 16px 20px; }
    main { padding: 24px 20px 48px; }
    .btn-row { flex-direction: column; }
  }