.hearts-container {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;
        z-index: -1; /* This is the key: it places the container behind everything else */
        background-color: #fde2e4; /* This creates the new pink background */
    }

    .heart {
        position: absolute;
        top: -10vh;
        font-size: 20px;
        opacity: 0;
        animation: fall 10s infinite linear;
    }

    @keyframes fall {
        0% { top: -10vh; opacity: 1; transform: rotate(0deg); }
        100% { top: 110vh; opacity: 1; transform: rotate(720deg); }
    }
    /* --- End of new styles --- */


    /* --- Your original, working styles (UNCHANGED) --- */
    body {
      margin: 0;
      font-family: 'Open Sans', sans-serif;
      /* The gradient background will be covered by the hearts-container, which is okay. */
      background: linear-gradient(to bottom, #ffe6f0, #fff);
      color: #d6336c;
      padding-bottom: 100px; 
    }
    header {
      background-color: #ffccd5;
      text-align: center;
      padding: 3rem 1rem;
    }
    header h1 {
      font-family: 'Great Vibes', cursive;
      font-size: 3rem;
      color: #d6336c;
    }
    section {
      padding: 2rem;
      max-width: 800px;
      margin: auto;
    }
    .gallery {
      overflow-x: auto;
      display: flex;
      gap: 1rem;
      padding: 1rem 0;
      scroll-behavior: smooth;
    }
    .gallery img {
      flex: 0 0 auto;
      width: 200px;
      height: 200px;
      object-fit: cover;
      border-radius: 1rem;
      box-shadow: 0 4px 6px rgba(0,0,0,0.1);
      transition: transform 0.3s ease;
    }
    .gallery img:hover {
      transform: scale(1.05);
    }
    .timeline {
      border-left: 3px solid #d6336c;
      padding-left: 1rem;
    }
    .timeline-entry {
      margin: 1rem 0;
    }
    .love-letter {
      font-style: italic;
      background: #fff0f5;
      padding: 1rem;
      border-radius: 1rem;
      box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    }
    .quiz {
      margin-top: 2rem;
      background: #ffeef8;
      padding: 1rem;
      border-radius: 1rem;
    }
    button {
      background-color: #ff99ac;
      border: none;
      padding: 0.5rem 1rem;
      color: white;
      font-weight: bold;
      border-radius: 0.5rem;
      cursor: pointer;
    }
    .result {
      margin-top: 1rem;
      font-weight: bold;
    }
    .back-link-container {
      position: fixed;
      bottom: 30px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 1000;
    }
    .back-link {
        display: inline-block;
        padding: 12px 25px;
        background: linear-gradient(135deg, #fcb6c7, #f88da6);
        color: white;
        text-decoration: none;
        font-weight: bold;
        border-radius: 50px;
        transition: transform 0.2s, background 0.3s;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    }
    .back-link:hover {
        transform: scale(1.05);
        background: linear-gradient(135deg, #f88da6, #fcb6c7);
    }