*{
    margin: 0;
    padding: 0;
}

:root{
    --primary: #fff;
    --bg-envelope-color: #f5edd1;
    --envelope-tab: #ecdeb8;
    --envelope-cover: #e6cfa7;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --txt-color: #444;
    --heart-color: rgb(252, 8, 231);
  }
  .one{
    background-color: #cccccc;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
  }

  .background{
    height: 100vh;
    width: 100%;
    position: relative;
  }
  .one{
    width: 100%;
    height: 100%;
  }
  .background img{
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  
  .container {
    height: 100%;
    width: 100%;
    top: 1.5rem;
    display: grid;
    position: absolute;
    place-items: center;
  }
  .container > .envelope-wrapper {
    background: var(--bg-envelope-color);
    box-shadow: 0 0 40px var(--shadow-color);
  }
  .envelope-wrapper > .envelope {
    position: relative;
    width: 500px;
    height: 240px;
  }
  .envelope-wrapper > .envelope::before {
    content: "";
    position: absolute;
    top: 0;
    z-index: 2;
    border-top: 150px solid var(--envelope-tab);
    border-right: 250px solid transparent;
    border-left: 250px solid transparent;
    transform-origin: top;
    transition: all 0.5s ease-in-out 0.7s;
  }
  .envelope-wrapper > .envelope::after {
    content: "";
    position: absolute;
    z-index: 2;
    width: 0px;
    height: 0px;
    border-top: 150px solid transparent;
    border-right: 250px solid var(--envelope-cover);
    border-bottom: 100px solid var(--envelope-cover);
    border-left: 250px solid var(--envelope-cover);
  }
  .envelope > .letter {
    position: absolute;
    right: 20%;
    bottom: 0;
    width: 60%;
    height: 98%;
    background: var(--primary);
    text-align: center;
    transition: all 1s ease-in-out;
    box-shadow: 0 0 5px var(--shadow-color);
    padding: 15px 15px 50px 15px;
  }
  
  .envelope > .letter > .text {
    font-family: 'Comic Neue';
    color: var(--txt-color);
    text-align: left;
    font-size: 12px;
  }
  .heart {
    position: absolute;
    top: 51%;
    left: 50%;
    width: 30px;
    height: 30px;
    background: rgb(255, 131, 151);
    z-index: 4;
    transform: translate(-50%, -20%) rotate(45deg);
    transition: transform 0.5s ease-in-out 1s;
    box-shadow: 0 1px 6px var(--shadow-color);
    cursor: pointer;
  }
  .heart:before, 
  .heart:after {
    content: "";
    position: absolute;
    width: 30px;
    height: 30px;
    background-color: rgb(255, 131, 151);
    border-radius: 50%;
  }
  .heart:before {
    top: -15.5px;
  }
  .heart:after {
    right: 15.5px;
  }
  .flap > .envelope:before {
    transform: rotateX(180deg);
    z-index: 0;
  }
  .flap > .envelope > .letter {
    bottom: 200px;
    transform: scale(1.5);
    transition-delay: 1s;
  }
  .flap > .heart {
    transform: rotate(90deg);
    transition-delay: 0.4s;
  }
  .love{
    text-align: center;
    font-weight: bold;
  }
  .pana{
    width: 100%;
    margin-top: .3rem;
  }
  .pana img{
    width: 1.5rem;
    margin: auto;
  }

  #window #gif img{
    opacity: 0;
    transition: opacity .3s, width .3s;
    width: 5rem;
  }
  #gif{
    pointer-events: none;
  }

  #window:hover #gif img{
    opacity: 1;
    width: 11rem;
  }

  .music-container{
    position: absolute;
    bottom: 0;
    left: 0;
    width: 500px;
    z-index: 1;
    transition: all 0.75s cubic-bezier(0.075, 0.82, 0.165, 1);
  }

  .player{
    display: flex;
    justify-content: end;
    align-items: center;
    width: 100%;
    height: 70px;
  }

  .track-info{
    position: absolute;
    top: 0;
    left: -.3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    width: 100%;
    transition: all .25s ease;
  }

  .trackname{
    font-size: 1.5rem;
    font-weight: bold;
    pointer-events: none;
  }
  .trackartist{
    font-size: .8rem;
    pointer-events: none;
  }
  .track-nav{
    gap: .2rem;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    transition: all .25s ease;
  }

  .music-container.hide {
    width: 140px;
  }

  .music-container.hide .track-info,
  .music-container.hide .track-nav {
    transition: all 0s ease;
    opacity: 0;
  }

  .toggle-player{
    position: absolute;
    right: -1rem;
    top: -1rem;
    width: 2rem;
    z-index: 2;
    border-radius: 100%;
    cursor: pointer;
  }

  .sound-bars-lottie{
    position: absolute;
    top: 1.1rem;
    left: 4.5rem;
  }
  .sound-bars{
    width: 100%;
    width: 60px;
    height: 60px;
  }
  .prev-track, .playpause-track, .next-track{
    cursor: pointer;
    z-index: 100;
    border-radius: 100%;
    padding: .3rem;
  }

  .prev-track:hover, .playpause-track:hover, .next-track:hover{
    background-color: rgb(190, 190, 190);
    transition-duration: .5s;
  }