*, *::before, *::after { box-sizing: border-box; }
    html, body { margin: 0; padding: 0; font-family: system-ui, "Segoe UI", Roboto, Arial; }

    .popup-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0,0,0,0.55);
      display: none;
      align-items: center;
      justify-content: center;
      padding: 18px;
      z-index: 9999;
    }

    .popup-box {
      width: clamp(320px, 95vw, 600px);
      background: #fff;
      border-radius: 14px;
      padding: 22px;
      box-shadow: 0 12px 30px rgba(0,0,0,0.25);
      text-align: center;
      position: relative;
      z-index: 10000;
    }

    .popup-box h2 { margin: 0 0 10px; color: #e65100; font-size: 1.4rem; }
    .popup-box p { margin: 0 0 14px; color: #333; font-size: 1rem; line-height: 1.4; }
    .popup-box button {
      padding: 10px 18px;
      border-radius: 10px;
      border: none;
      background: linear-gradient(90deg,#ff9800,#e65100);
      color: #fff;
      font-weight: 600;
      cursor: pointer;
    }

    #confetti-canvas {
      position: fixed;
      inset: 0;
      width: 100%;
      height: 100%;
      z-index: 10001;
      pointer-events: none;
    }