body {
    margin: 0;
  }
  
  h1,
  h2,
  h3,
  h4,
  h5 {
    margin: 0;
    padding: 0;
  }
  
  /* стили кнопки */
  
  .fixed-btn {
    border: transparent;
    padding: 0;
    position: fixed;
    top: 25%;
    right: -10px;
    z-index: 1000;
    width: 65px;
    height: 50px;
    border-top-left-radius: 25px;
    border-bottom-left-radius: 25px;
    box-shadow: -1px 2px 7px rgb(0 0 0 / 30%);
    transition: all 0.5s;
    background: url("../img/phone-icon.png"), #c00;
    background-size: 40px;
    background-repeat: no-repeat;
    background-position: 30%;
    transition: transform 0.2s;
    cursor: pointer;
  }
  
  .fixed-btn:hover {
    transform: translate(-5px, 0);
  }
  
  @media screen and (min-width: 768px) {
    .fixed-btn {
      right: -15px;
      width: 95px;
      height: 70px;
      border-top-left-radius: 35px;
      border-bottom-left-radius: 35px;
      box-shadow: -2px 3px 11px rgb(0 0 0 / 30%);
      background-size: 50px;
    }
  
    .fixed-btn:hover {
      transform: translate(-15px, 0);
    }
  }
  
  /* Бэкдроп с формой */
  
  .backdrop {
    position: fixed;
    z-index: 1002;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(1, 31, 74, 0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
    transition: opacity 0.2s, visibility 0.2s;
  }
  
  .is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }
  
  .btn-close-popup-btn {
    width: 10px;
    height: 10px;
    position: absolute;
    top: 15px;
    right: 15px;
    background: url("./close-icon.svg"), #c00;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    color: white;
    border: none;
    cursor: pointer;
    padding: 5px;
  }
  
  @media screen and (min-width: 768px) {
    .btn-close-popup-btn {
      background-size: 85%;
      width: 15px;
      height: 15px;
      top: 20px;
      right: 20px;
    }
  }
  
  .btn-popup {
    position: relative;
    min-width: 250px;
    min-height: 250px;
    background-color: white;
    border-radius: 30px;
    color: black;
    border: 10px solid #c00;
    overflow-y: auto;
    padding: 20px 20px;
  }
  
  @media screen and (min-width: 768px) {
    .btn-popup {
      min-width: 350px;
      max-height: 450px;
      border-radius: 5%;
      padding: 30px 15px;
    }
  }
  
  .btn-popup-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px 15px;
  }
  
  .btn-popup-title {
    font-size: 30px;
    font-weight: 500;
    margin-bottom: 8px;
  }
  
  @media screen and (min-width: 768px) {
    .btn-popup-title {
      font-size: 40px;
      font-weight: 700;
      margin-bottom: 10px;
    }
  }
  
  .form {
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  
  .form-field {
    width: 100%;
    max-width: 310px;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }
  
  @media screen and (min-width: 768px) {
    .form-field {
      margin-bottom: 14px;
    }
  }
  
  .popup-input {
    padding: 8px 14px;
    width: 100%;
    border: 2px solid grey;
    border-radius: 32px;
    background-color: rgba(0, 0, 0, 0);
    color: #000;
  }
  .popup-label {
    margin-left: 5px;
    margin-bottom: 10px;
  }
  
  .form-btn {
    color: white;
    display: block;
    padding: 8px 16px;
    margin-bottom: 8px;
    background-color: #c00;
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.2s;
  }
  
  .form-btn:hover {
    background-color: white;
    border: 2px solid #c00;
    color: black;
  }