/* ---------- পেছনের 3D দৃশ্য ---------- */
    #mtScene {
      position: fixed;
      inset: 0;
      z-index: 0;
      pointer-events: none;
      overflow: hidden;
      display: none;
    }

    html[data-mm-theme] #mtScene {
      display: block;
    }

    html[data-mm-theme] .container,
    html[data-mm-theme] .page-footer {
      position: relative;
      z-index: 1;
    }

    #mtScene .mt-obj {
      position: absolute;
      transform-origin: center;
      will-change: transform;
    }

    #mtScene .mt-obj svg {
      width: 100%;
      height: auto;
      display: block;
      overflow: visible;
    }

    #mtScene .mt-blob {
      position: absolute;
      border-radius: 50% !important;
      filter: blur(60px);
    }

    #mtScene .mt-float {
      animation: mtFloat 14s ease-in-out infinite;
    }

    #mtScene .mt-float.slow {
      animation-duration: 20s;
      animation-delay: -6s;
    }

    @keyframes mtFloat {

      0%,
      100% {
        translate: 0 0;
      }

      50% {
        translate: 0 -14px;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      #mtScene .mt-float {
        animation: none;
      }
    }

    @media (max-width: 760px) {
      #mtScene .mt-obj.hide-sm {
        display: none;
      }
    }

    @media print {
      #mtScene {
        display: none !important;
      }
    }

    /* ---------- Theme Studio ---------- */
    .mt-studio-top {
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
      gap: 18px;
      margin-bottom: 18px;
    }

    .mt-panel {
      padding: 20px 22px;
      background: var(--surface);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
    }

    .mt-panel h2 {
      font-family: var(--mt-display, 'Hind Siliguri'), 'Hind Siliguri', sans-serif;
      font-size: 21px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.25;
    }

    .mt-panel>p,
    .mt-sub {
      margin-top: 4px;
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 14.5px;
      line-height: 1.5;
      color: var(--text2);
      max-width: 62ch;
    }

    .mt-live {
      margin-top: 14px;
      border: 1px solid var(--border);
      overflow: hidden;
      box-shadow: 0 18px 40px -20px rgba(0, 0, 0, .35);
    }

    .mt-live>svg {
      display: block;
      width: 100%;
      height: auto;
    }

    .mt-live-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 12px;
    }

    .mt-opts {
      display: grid;
      gap: 14px;
      margin-top: 14px;
    }

    .mt-opt label {
      display: block;
      margin-bottom: 6px;
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 14px;
      font-weight: 700;
      color: var(--text);
    }

    .mt-seg {
      display: inline-flex;
      flex-wrap: wrap;
      gap: 4px;
      padding: 4px;
      background: var(--surface2);
      border: 1px solid var(--border);
    }

    .mt-seg button {
      padding: 7px 13px;
      border: 0;
      background: transparent;
      color: var(--text2);
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 13.5px;
      font-weight: 600;
      cursor: pointer;
    }

    .mt-seg button.on {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 12px -4px color-mix(in srgb, var(--accent) 70%, transparent);
    }

    .mt-seg button:disabled {
      cursor: not-allowed;
      opacity: .55;
    }

    .mt-seg button:focus-visible,
    .mt-act:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    .mt-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
      gap: 16px;
      margin-top: 16px;
    }

    .mt-tile {
      position: relative;
      display: flex;
      flex-direction: column;
      background: var(--surface2);
      border: 2px solid var(--border);
      overflow: hidden;
      color: var(--text);
      transition: border-color .2s, transform .2s, box-shadow .2s;
    }

    .mt-tile:hover {
      border-color: color-mix(in srgb, var(--accent) 55%, transparent);
      transform: translateY(-3px);
      box-shadow: 0 16px 34px -16px rgba(0, 0, 0, .3);
    }

    .mt-tile.is-current {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
    }

    .mt-tile .mt-prev {
      display: block;
      aspect-ratio: 200 / 118;
    }

    .mt-tile .mt-prev>svg {
      display: block;
      width: 100%;
      height: 100%;
    }

    .mt-tile-body {
      display: flex;
      flex-direction: column;
      gap: 3px;
      flex: 1;
      padding: 12px 14px 14px;
    }

    .mt-tile-body strong {
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 17px;
      font-weight: 700;
    }

    .mt-tile-body>span {
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 13.5px;
      line-height: 1.45;
      color: var(--text2);
    }

    .mt-tile-body .mt-swatches {
      display: flex;
      gap: 5px;
      margin: 8px 0 12px;
    }

    .mt-swatches i {
      display: block;
      flex: none;
      width: 18px;
      height: 18px;
      border-radius: 50% !important;
      border: 2px solid rgba(255, 255, 255, .85);
      box-shadow: 0 1px 3px rgba(0, 0, 0, .25);
    }

    .mt-actions {
      display: flex;
      gap: 8px;
      margin-top: auto;
    }

    .mt-act {
      flex: 1;
      padding: 8px 10px;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--text);
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 13.5px;
      font-weight: 700;
      cursor: pointer;
      white-space: nowrap;
    }

    .mt-act:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    .mt-act.primary {
      background: var(--accent);
      border-color: var(--accent);
      color: #fff;
    }

    .mt-act.primary:hover {
      color: #fff;
      filter: brightness(1.07);
    }

    .mt-act.gold {
      background: linear-gradient(135deg, #F7C948, #E4572E);
      border-color: transparent;
      color: #fff;
    }

    .mt-act:disabled {
      opacity: .55;
      cursor: not-allowed;
    }

    .mt-badge {
      position: absolute;
      top: 10px;
      right: 10px;
      padding: 3px 9px;
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 12px;
      font-weight: 700;
      color: #fff;
      background: rgba(20, 20, 30, .72);
      backdrop-filter: blur(6px);
    }

    .mt-badge.on {
      background: var(--accent);
    }

    .mt-badge.pro {
      background: linear-gradient(135deg, #F2B632, #E4572E);
    }

    .mt-badge.new {
      left: 10px;
      right: auto;
      background: #0FB5AE;
    }

    .mt-note {
      margin-top: 14px;
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 13.5px;
      color: var(--text2);
    }

    .mt-link {
      color: var(--accent);
      font-weight: 700;
      background: none;
      border: 0;
      cursor: pointer;
      font: inherit;
      padding: 0;
      text-decoration: underline;
    }

    /* Settings-এ ছোট লিংক কার্ড */
    .mt-settings-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      flex-wrap: wrap;
      margin: 0 0 18px;
      padding: 16px 20px;
      background: var(--surface);
      border: 1px solid var(--border);
    }

    .mt-settings-link strong {
      display: block;
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 17px;
      color: var(--text);
    }

    .mt-settings-link span {
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 14px;
      color: var(--text2);
    }

    /* ---------- ডেমো বার ---------- */
    #mtDemoBar {
      position: fixed;
      left: 50%;
      bottom: 22px;
      z-index: 1200;
      transform: translateX(-50%);
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: center;
      max-width: calc(100vw - 24px);
      padding: 10px 12px 10px 16px;
      background: rgba(17, 17, 28, .9);
      color: #fff;
      backdrop-filter: blur(12px);
      box-shadow: 0 18px 40px rgba(0, 0, 0, .35);
      font-family: 'Hind Siliguri', sans-serif;
      font-size: 14.5px;
    }

    #mtDemoBar b {
      color: #FFD27A;
    }

    #mtDemoBar .mt-act {
      flex: none;
      background: rgba(255, 255, 255, .12);
      border-color: rgba(255, 255, 255, .2);
      color: #fff;
    }

    #mtDemoBar .mt-act.gold {
      background: linear-gradient(135deg, #F7C948, #E4572E);
    }

    #mtDemoBar .mt-timer {
      font-variant-numeric: tabular-nums;
      min-width: 3.2ch;
      text-align: right;
      opacity: .8;
    }

    @media (max-width: 760px) {
      #mtDemoBar {
        bottom: 76px;
      }

      .mt-studio-top {
        grid-template-columns: 1fr;
      }
    }

    /* ---------- Pro লক / ডেমো ব্যানার (ফিচার পেজে) ---------- */
    .mt-probar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      flex-wrap: wrap;
      margin: 0 0 18px;
      padding: 14px 18px;
      background: linear-gradient(120deg, color-mix(in srgb, #F7C948 22%, var(--surface)), color-mix(in srgb, #E4572E 16%, var(--surface)));
      border: 1px solid color-mix(in srgb, #E4572E 35%, transparent);
      font-family: 'Hind Siliguri', sans-serif;
      color: var(--text);
    }

    .mt-probar strong {
      font-size: 16px;
    }

    .mt-probar span {
      display: block;
      font-size: 14px;
      color: var(--text2);
    }

    .mt-probar .mt-act {
      flex: none;
    }

    .mt-sidebar-crown {
      margin-left: auto;
      font-size: 11px;
      line-height: 1;
      padding: 3px 6px;
      background: linear-gradient(135deg, #F7C948, #E4572E);
      color: #fff;
      font-weight: 700;
    }

    body.plan-pro .mt-sidebar-crown,
    body.plan-plus .mt-sidebar-crown {
      display: none;
    }

    .mt-header-btn {
      display: none;
    }

    body.moderator-mode .mt-header-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .mt-header-btn svg {
      width: 20px;
      height: 20px;
    }