/* ── Presentation preview card ── */
    .pres-card {
      position: relative;
      margin: 2.5rem 0;
      border: 1px solid rgba(255,255,255,0.12);
      background: #0a0a0a;
      overflow: hidden;
      cursor: pointer;
      transition: border-color 0.3s;
    }
    .pres-card:hover { border-color: rgba(255,255,255,0.35); }

    /* iframe preview — non-interactive, scaled down */
    .pres-card-iframe-wrap {
      position: relative;
      width: 100%;
      /* 16:9 aspect at reduced scale */
      padding-bottom: 56.25%;
      overflow: hidden;
      pointer-events: none;
    }
    .pres-card-iframe-wrap iframe {
      position: absolute;
      top: 0; left: 0;
      width: 200%; height: 200%;
      transform: scale(0.5);
      transform-origin: top left;
      border: none;
      pointer-events: none;
    }

    /* Click-to-launch overlay */
    .pres-card-overlay {
      position: absolute;
      inset: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 0.75rem;
      background: rgba(0,0,0,0.52);
      backdrop-filter: blur(2px);
      transition: background 0.3s;
      z-index: 10;
    }
    .pres-card:hover .pres-card-overlay { background: rgba(0,0,0,0.3); }
    .pres-card-label {
      font-size: 0.6rem;
      font-weight: 600;
      letter-spacing: 0.28em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.5);
    }
    .pres-card-btn {
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: #fff;
      border: 1px solid rgba(255,255,255,0.4);
      padding: 0.6rem 1.5rem;
      background: none;
      cursor: pointer;
      font-family: inherit;
      transition: background 0.25s, border-color 0.25s;
    }
    .pres-card-btn:hover { background: rgba(255,255,255,0.08); border-color: #fff; }

    /* ── Full-screen presentation modal ── */
    .pres-modal {
      position: fixed;
      inset: 0;
      z-index: 19999;
      background: #000;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.35s ease;
      display: flex;
      flex-direction: column;
    }
    .pres-modal.open { opacity: 1; pointer-events: auto; }

    .pres-modal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0.75rem 1.5rem;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      flex-shrink: 0;
    }
    .pres-modal-title {
      font-size: 0.62rem;
      font-weight: 600;
      letter-spacing: 0.25em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.4);
    }
    .pres-modal-close {
      font-size: 0.62rem;
      font-weight: 600;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: rgba(255,255,255,0.5);
      background: none;
      border: 1px solid rgba(255,255,255,0.15);
      padding: 0.35rem 0.9rem;
      cursor: pointer;
      font-family: inherit;
      transition: color 0.2s, border-color 0.2s;
    }
    .pres-modal-close:hover { color: #fff; border-color: rgba(255,255,255,0.5); }

    .pres-modal iframe {
      flex: 1;
      width: 100%;
      border: none;
    }