/* NEW: App selector */
    .app-chooser{
      display:grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
      margin-top: 14px;
    }
    @media (max-width: 520px){
      .app-chooser{ grid-template-columns: 1fr; }
    }
    .app-tile{
      border-radius: 20px;
      padding: 18px;
      border: 1px solid rgba(255,255,255,.22);
      background: linear-gradient(180deg, rgba(255,255,255,.18), rgba(255,255,255,.10));
      backdrop-filter: blur(10px);
      box-shadow:
        0 20px 50px rgba(2,6,23,.18),
        inset 0 1px 0 rgba(255,255,255,.25);
      cursor:pointer;
      user-select:none;
      transform: translateY(0);
      transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
      position: relative;
      overflow:hidden;
      min-height: 150px;
      display:flex;
      align-items:center;
      justify-content:center;
      text-align:center;
    }
    .app-tile:hover{
      transform: translateY(-3px);
      box-shadow:
        0 26px 70px rgba(2,6,23,.22),
        inset 0 1px 0 rgba(255,255,255,.25);
      filter: saturate(1.05);
    }
    .app-tile:active{ transform: translateY(-1px) scale(.99); }

    .app-tile .glow{
      position:absolute;
      inset:-40px -60px auto auto;
      width:220px;height:220px;border-radius:999px;
      opacity:.55;
      filter: blur(18px);
      pointer-events:none;
    }
    .app-tile.meeting .glow{ background: radial-gradient(circle at 30% 30%, rgba(13,110,253,.95), transparent 60%); }
    .app-tile.car .glow{ background: radial-gradient(circle at 30% 30%, rgba(25,135,84,.95), transparent 60%); }

    /* NEW: icon image inside app-icon */
  .app-icon{
    width: 72px;height:72px;border-radius: 18px;
    display:flex;align-items:center;justify-content:center;
    margin: 0 auto 10px;
    box-shadow: 0 14px 34px rgba(2,6,23,.20), inset 0 1px 0 rgba(255,255,255,.22);
    border: 1px solid rgba(255,255,255,.20);
    background: rgba(255,255,255,.16);
    font-size: 34px;
    position: relative;
    overflow: hidden;
  }

  .app-icon img{
    width: 82%;
  height: 82%;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 10px 18px rgba(2,6,23,.18));
  }

  /* NEW: class để ẩn ảnh khi lỗi và hiện fallback */
  .app-icon.is-fallback img{ display:none; }
    .app-title{ font-weight: 900; letter-spacing:.2px; font-size: 1.05rem; margin: 0; }
    .app-desc{ margin: 6px 0 0; color: rgba(15,23,42,.72); font-size: .92rem; }
/* NEW: mặc định chỉ hiện ảnh, ẩn fallback */
.app-icon .fallback{
  display: none;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

/* NEW: khi ảnh lỗi -> class is-fallback: ẩn img, hiện fallback */
.app-icon.is-fallback img{ display:none; }
.app-icon.is-fallback .fallback{
  display: flex;
  font-size: 34px; /* đúng với icon size cũ */
  line-height: 1;
}

    /* NEW: Login header badge */
    .app-badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding: 8px 12px;
      border-radius: 999px;
      border:1px solid rgba(15,23,42,.10);
      background: rgba(255,255,255,.55);
      box-shadow: 0 10px 26px rgba(2,6,23,.10);
      font-weight: 800;
      font-size: .9rem;
    }
    .app-badge .dot{
      width:10px;height:10px;border-radius:50%;
      background:#0d6efd;
    }
    .app-badge.car .dot{ background:#198754; }

    /* NEW: hide/show steps */
    .step{ display:none; }
    .step.show{ display:block; }

    /* NEW: back button */
    .btn-back{
      border-radius: 999px;
      padding: .45rem .8rem;
    }