@font-face {
    font-family: "comfy";
    src: url("Comfy Feeling.otf");
  }

  @font-face {
    font-family: "unicorn";
    src: url("Super Unicorn.ttf");
  }

  @font-face {
    font-family: "coolvetica";
    src: url("Coolvetica.otf");
  }
  
  .backbtn {
    position: fixed;
    z-index: 9999;
    top: 0.5rem;
    left: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: #fff;
    color: #333;
    border: 1px solid #333;
    border-radius: 0.25rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s ease;
    transition: color 0.3s ease;
    font-family: sans-serif;
    height: 35px;
    line-height: 20px;
  }
  
  body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f5;
    color: #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
  }
  
  .timer {
    margin: 0 0 1rem 0;
    line-height: 1.2;
    background-color: #ff474c;
    border-radius: 10px;
    margin: 20px 0;
    padding: 1%;
    text-align: center;
    transition: background-color 0.3s ease, transform 0.3s ease;
  }

  #count {
    font-size: 5rem;
    font-family: 'unicorn', cursive;
  }

  #phase {
    font-size: 2rem;
    font-family: 'comfy', cursive;
  }

  input {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    padding: 0.5rem;
    border: none;
    border-radius: 0.25rem;
    background-color: #fff;
    box-shadow: 0 0 0 1px #333;
    margin: 0 0.5rem 0.5rem 0.5rem;
    width: 10%;
    transition: box-shadow 0.3s ease;
  }

  input:focus {
    box-shadow: 0 0 0 2px #ff474c;
  }


  #settings {
    font-size: 1rem;
    text-align: center;
    background-color: #d5d1d1;
    border-radius: 10px;
    transition: transform 0.5s ease;
  }

  #settings:hover {
    transform: scale(1.02);
  }

  .settingsTip {
    font-size: 1.5rem;
    font-family: 'coolvetica', sans-serif;
    cursor: pointer;
    margin: 1%;
  }

  .controls {
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #4d4a4a;
    border-radius: 10px;
    width: auto;
    margin: 10px auto 10px auto;
  }

  .playback {
    margin: 0.5rem;
    padding: 0.6rem 1.2rem;
    color: #fff;
    background-color: #00000000;
    border: 1px solid #fff;
    border-radius: 0.25rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease, height 0.3s ease;
  }

  .playback:hover {
    transform: translateY(-2px);
    background-color: #00000070;
  }

  .playback:active {
    transform: translateY(0);
    background-color: #000000f0;
  }

  .invisible {
    display: none;
  }
  
  .content {
    width: 90%;
    max-width: 600px;
    padding: 20px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    margin: 20px 0;
  }
  
  h1 {
    font-size: 3rem;
    margin: 0 0 1rem 0;
    line-height: 1.2;
  }
  
  p {
    margin: 0 0 1.5rem 0;
  }
  
  .backbtn:hover {
    background-color: #11d84d;
    color: #fff;
  }