body {
    font-family: "Avenir", "Helvetica Neue", Helvetica, Arial, sans-serif;
    background: #000;
    color: #666;
    font-size: 16px;
    line-height: 1.5em;
    margin: 0;
    padding: 0;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
  }

  .background-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    object-fit: cover;
    z-index: 0;
  }

  .background-audio {
    position: fixed;
    top: -9999px;
    left: -9999px;
    opacity: 0;
    z-index: 1;
  }

  .canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2;
    background: transparent;
    pointer-events: none;
  }

  .images-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: transparent;
    z-index: 3;
    pointer-events: none;
    opacity: 0;
    transition: opacity 1s ease-in-out;
  }

  .center-image {
    position: absolute;
    width: 600px;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
    animation: gentleShake 2s ease-in-out infinite;
    left: 31%;
    top: 15%;
    transform: translate(-50%, -50%);
    z-index: 10;
  }

  .vietnamese-text {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, calc(-50% + 280px));
    text-align: center;
    font-family: 'Dancing Script', cursive;
    font-size: 25px;
    font-weight: 600;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
    max-width: 600px;
    line-height: 1.4;
  }

  .vietnamese-text p {
    margin: 10px 0;
  }

  .side-image {
    position: absolute;
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    animation: gentleShake 2s ease-in-out infinite;
  }

  .left-side {
    left: 10%;
  }

  .right-side {
    left: 70%;
  }

  .start-button-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    transition: opacity 0.5s ease-out;
  }

  .start-button {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    border: none;
    border-radius: 20px;
    padding: 30px 60px;
    cursor: pointer;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    text-align: center;
    min-width: 200px;
  }

  .start-button:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
    background: linear-gradient(135deg, #ff5252, #d63031);
  }

  .start-button:active {
    transform: translateY(-2px);
  }

  .start-text {
    display: block;
    font-family: 'Dancing Script', cursive;
    font-size: 36px;
    font-weight: 700;
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: 10px;
  }

  .start-subtitle {
    display: block;
    font-family: 'Arial', sans-serif;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
  }

  .start-button-container.hidden {
    opacity: 0;
    pointer-events: none;
  }

  @keyframes gentleShake {
    0%, 100% {
      transform: translateX(0) translateY(0) rotate(0deg);
    }
    25% {
      transform: translateX(-2px) translateY(-1px) rotate(-1deg);
    }
    50% {
      transform: translateX(2px) translateY(1px) rotate(1deg);
    }
    75% {
      transform: translateX(-1px) translateY(2px) rotate(-0.5deg);
    }
  }
  
  h1 {
    color: #111;
    margin: 0 0 12px 0;
    font-size: 24px;
    line-height: 1.5em;
  }
  
  p {
    margin: 0 0 10x 0;
  }
  
  a {
    color: #888;
    text-decoration: none;
    border-bottom: 1px solid #ccc;
  }
  
  a:hover {
    border-bottom-color: #888;
  }
  
  body,
  .overlay {
    -webkit-perspective: 1000;
    -webkit-perspective-origin-y: 25%;
  }
  
  .body--ready {
    /* Video background replaces gradient */
    background: transparent;
  }
  
  .body--ready .overlay {
    -webkit-transition: -webkit-transform 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -moz-transition: -moz-transform 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -ms-transition: -ms-transform 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -o-transition: -o-transform 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1);
    transition: transform 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1);
  }
  
  
  .ui {
    position: absolute;
    left: 50%;
    bottom: 5%;
    width: 300px;
    margin-left: -150px;
    display: none; /* Hide UI for Vietnamese Women's Day display */
  }
  
  .ui-input {
    width: 100%;
    height: 50px;
    background: none;
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    text-align: center;
    border: none;
    border-bottom: 2px solid white;
  }
  
  .ui-input:focus {
    outline: none;
    border: none;
    border-bottom: 2px solid white;
  }
  
  .ui-return {
    display: none;
    position: absolute;
    top: 20px;
    right: 0;
    padding: 3px 2px 0 2px;
    font-size: 10px;
    line-height: 10px;
    color: #fff;
    border: 1px solid #fff;
  }
  
  .ui--enter .ui-return {
    display: block;
  }
  
  .ui--wide {
    width: 76%;
    margin-left: 12%;
    left: 0;
  }
  
  .ui--wide .ui-return {
    right: -20px;
  }
  
  .help {
    position: absolute;
    top: 40px;
    right: 40px;
    width: 25px;
    height: 25px;
    text-align: center;
    font-size: 13px;
    line-height: 27px;
    font-weight: bold;
    cursor: pointer;
    background: #fff;
    color: #79a8ae;
    opacity: .9;
    display: none; /* Hide help button for Vietnamese Women's Day display */
  
    -webkit-transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -moz-transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -ms-transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -o-transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
  }
  
  .help:hover {
    opacity: 1;
  }
  
  .overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 550px;
    height: 490px;
    margin: -260px 0 0 -275px;
    opacity: 0;
    display: none; /* Hide overlay for Vietnamese Women's Day display */
  
    -webkit-transform: rotateY(90deg);
    -moz-transform: rotateY(90deg);
    -ms-transform: rotateY(90deg);
    -o-transform: rotateY(90deg);
    transform: rotateY(90deg);
  }
  
  .overlay--visible {
    opacity: 1;
  
    -webkit-transform: rotateY(0);
    -moz-transform: rotateY(0);
    -ms-transform: rotateY(0);
    -o-transform: rotateY(0);
    transform: rotateY(0);
  }
  
  .ui-share,
  .ui-details {
    opacity: .9;
    background: #fff;
    z-index: 2;
  }
  
  .ui-details-content,
  .ui-share-content {
    padding: 100px 50px;
  }
  
  .commands {
    margin: 0;
    padding: 0;
    list-style: none;
    cursor: pointer;
  }
  
  .commands-item {
    font-size: 12px;
    line-height: 22px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 20px;
    background: #fff;
    margin-top: 1px;
    color: #333;
    opacity: .9;
  
    -webkit-transition: -webkit-transform 0.7s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -moz-transition: -moz-transform 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -ms-transition: -ms-transform 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -o-transition: -o-transform 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    transition: transform 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1),
                        opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
  }
  
  .commands-item--gap {
    margin-top: 9px;
  }
  
  .commands-item:hover {
    opacity: 1;
  }
  
  .commands-item:hover .commands-item-action {
    background: #333;
  }
  
  .commands-item a {
    display: inline-block;
  }
  
  .commands-item-mode {
    display: inline-block;
    margin-left: 3px;
    font-style: italic;
    color: #ccc;
  }
  
  .commands-item-title {
    display: inline-block;
    width: 150px;
  }
  
  .commands-item-info {
    display: inline-block;
    width: 300px;
    font-size: 14px;
    text-transform: none;
    letter-spacing: 0;
    font-weight: normal;
    color: #aaa;
  }
  
  .commands-item-action {
    display: inline-block;
    float: right;
    margin-top: 3px;
    text-transform: uppercase;
    font-size: 10px;
    line-height: 10px;
    color: #fff;
    background: #90c9d1;
    padding: 5px 10px 4px 10px;
    border-radius: 3px;
  }
  
  .commands-item:first-child {
    margin-top: 0;
  }
  
  .twitter-share {
    position: absolute;
    top: 4px;
    right: 20px;
  }
  
  
  .tabs-labels {
    margin-bottom: 9px;
  }
  
  .tabs-label {
    display: inline-block;
    background: #fff;
    padding: 10px 20px;
    font-size: 12px;
    line-height: 22px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #333;
    opacity: .5;
    cursor: pointer;
    margin-right: 2px;
  
    -webkit-transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -moz-transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -ms-transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    -o-transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
    transition: opacity 0.1s cubic-bezier(0.694, 0.0482, 0.335, 1);
  }
  
  .tabs-label:hover {
    opacity: .9;
  }
  
  .tabs-label--active {
    opacity: .9;
  }
  
  .tabs-panel {
    display: none;
  }
  
  .tabs-panel--active {
    display: block;
  }
  
  .tab-panel {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
  }
  
  .touch .ui-input {
    display: none;
  }