  /* Your Custom CSS (Design System) */
  :root {
    --font-fira-mono: sans-serif;
    --c-white: #fff;
    --c-foreground: #fff;
    --c-black: hsl(0, 0%, 10%);
    --c-bg: #e6eef9;
    --c-primary: #4970FF;
    --c-secondary: #6989FF;
  }
  
  @media (prefers-color-scheme: dark) {
    :root {
      --c-white: #121212;
      --c-black: #f0f0f0;
      --c-bg: #090a18;
      --c-foreground: #292b40;
      --c-primary: #92ABFF;
      --c-secondary: #7194FF;
    }
  }
  
  *,
  *:before,
  *:after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    height: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='hsl(0, 0%25, 20%25)' opacity='0.1' width='20' height='20' viewBox='-5 -5 10 10'%3E%3Ccircle id='dot' r='1' /%3E%3Cuse href='%23dot' x='5' y='5' /%3E%3Cuse href='%23dot' x='-5' y='5' /%3E%3Cuse href='%23dot' x='5' y='-5' /%3E%3Cuse href='%23dot' x='-5' y='-5' /%3E%3C/svg%3E"), var(--c-bg);
    font-family: var(--font-fira-mono);
    background-size: 10px;
  }
  
  a {
    text-decoration: none;
    color: var(--c-black);
  }
  
  ::selection {
    color: var(--c-white);
    background: var(--c-secondary);
  }
  
  @keyframes shake {
    
    from,
    to {
      transform: scale(1, 1);
    }
    
    25% {
      transform: scale(0.9, 1.1);
    }
    
    50% {
      transform: scale(1.1, 0.9);
    }
    
    75% {
      transform: scale(0.95, 1.05);
    }
  }
  
  header {
    background: linear-gradient(0deg, rgba(0, 60, 60, 0) 0%, var(--c-bg) 60%);
    color: var(--c-primary);
    width: 100%;
    height: 3.7rem;
    z-index: 1;
    padding: 0 .6rem;
    font-weight: 700;
    font-size: 1.7rem;
    display: flex;
    align-items: center;
    text-align: center;
    justify-content: center;
  }
  
  #player {
    background-color:var(--c-black) ;
    border-radius: 0.5rem;
    width: 95%;
    max-width: 95%;
    min-height: calc(100vw * 9 / 16);
    aspect-ratio: 16 / 9;
    margin: auto;
    display: block;
    transition: all .3s ease;
  }
  
  form {
    padding: 1.5rem 2rem;
    background: var(--c-foreground);
    color: hsl(0, 0%, 10%);
    max-width: 85%;
    width: 100vw;
    position: absolute;
    bottom: 3rem;
    box-shadow: 0 1px 10px -8px currentColor;
    border-radius: 0.5rem;
    z-index: 999;
    animation: slideUp 0.5s ease forwards;
  }
  
  form>*+* {
    margin-top: 0.5rem;
  }
  
  form label {
    display: block;
    font-weight: 700;
    font-size: 1rem;
    color: var(--c-black);
  }
  
  #youtubeInput {
    padding: 0.5rem;
    background: transparent;
    font-size: .9rem;
    font-family: inherit;
    color: var(--c-black);
    letter-spacing: .9px;
    outline: none;
    border-radius: 0.5rem;
    resize: none;
    width: 100%;
    border: 0.125rem solid #C5CDD8;
    transition: border-color 0.2s ease;
  }
  
  #youtubeInput:focus {
    border-color: var(--c-black);
  }
  
  form button {
    user-select: none;
    background: var(--c-secondary);
    width: 100%;
    border: none;
    border-radius: 0.5rem;
    color: hsl(0, 0%, 100%);
    font-size: 0.9rem;
    cursor: pointer;
    text-transform: uppercase;
    font-family: inherit;
    padding: 0.5rem 1rem;
  }
  
  form button:hover {
    animation: shake 0.3s ease;
    background-color: var(--c-primary);
  }
  
  .contact {
    text-align: center;
    width: 100%;
    padding: 0.8rem 0;
    position: fixed;
    bottom: 0;
    font-size: .9rem;
    color: var(--c-black);
  }
  
  @keyframes slideUp {
    from {
      transform: translateY(100%);
      opacity: 0;
    }
    
    to {
      transform: translateY(0);
      opacity: 1;
    }
  }