:root {
  --wine-red: #C7375F;
  --bright-red: #D42D2F;
  --dark-green: #344D2F;
  --light-green: #77A047;
  --gold: #FAC57D;
  --snow: #F0F4F7;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
    color: var(--dark-green);
    background-color: rgba(0,0,0,0.7);
    background-image: url("https://cdn.pixabay.com/photo/2017/12/05/16/39/christmas-tree-2999722_960_720.jpg");
    background-blend-mode: overlay;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

h1 {
    color: white;
    text-shadow: 2px 2px 2px rgba(255,0,0,0.9), -2px -2px 2px rgba(0,0,0,.9);
}

.container {
    display: flex;
    flex-direction: column;
    background: var(--wine-red);
    color: var(--snow);
    padding: 1em 2em;
    border-radius: 5px;
    box-shadow: rgba(0, 0, 0, 0.1) 0px 4px 6px -1px, rgba(0, 0, 0, 0.06) 0px 2px 4px -1px;
    background: rgba(0,0,0,0.8);
    border: 4px dotted white;
}

meter {
    height: 50px;
    width: 200px;
    background: rgba(0,0,0,0.5)
}

meter::-webkit-meter-bar {
  
  animation: animate-stripes 5s linear infinite;
  background-image:
    linear-gradient(
      135deg,
      transparent,
      transparent 33%,
      rgba(255,0, 0, .1) 33%,
      rgba(255, 0, 0, 1) 66%,
      transparent 66%
    );
  background-size: 50px 25px;
}

@keyframes animate-stripes {
  to { background-position: -50px 0; }
}