*, *::after, *::before {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
  }
   
   
  body {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    background-color: #ecf0f3;
    /* background-color: #dff5f0; */
    /* background-color: #ECF14D ; */
    color: #a0a5a8;
  }
   
   
  .main {
    position: relative;
    width: 1000px;
    min-width: 1000px;
    min-height: 600px;
    height: 600px;
    padding: 25px;
    background-color: #ecf0f3;
    box-shadow: 10px 10px 10px #d1d9e6, -10px -10px 10px #f9f9f9;
    border-radius: 12px;
    overflow: hidden;
  }
   
  .container {
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    width: 600px;
    height: 100%;
    padding: 25px;
    background-color: #ecf0f3;
    transition: 1.25s;
  }
   
  .form {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    width: 100%;
    height: 100%;
  }
  .form__icon {
    object-fit: contain;
    width: 30px;
    margin: 0 5px;
    opacity: .5;
    transition: .15s;
  }
  .form__icon:hover {
    opacity: 1;
    transition: .15s;
    cursor: pointer;
  }
  .form__input {
  
    width: 350px;
    height: 40px;
    margin: 4px 0;
    padding-left: 25px;
    font-size: 13px;
    font-weight: bold;
    letter-spacing: .15px;
    border: none;
    outline: none;
    font-family: 'Montserrat', sans-serif;
    background-color: #ecf0f3;
    transition: .25s ease;
    border-radius: 8px;
    box-shadow: inset 2px 2px 4px #d1d9e6, inset -2px -2px 4px #f9f9f9;
  }
  .form__input:focus {
    box-shadow: inset 4px 4px 4px #d1d9e6, inset -4px -4px 4px #181818;
  
  }
  .form__span {
    margin-top: 30px;
    margin-bottom: 12px;
  }
  .form__link {
    color: #181818;
    font-size: 15px;
    margin-top: 25px;
    border-bottom: 1px solid #a0a5a8;
    line-height: 2;
  }
   
  .title {
    font-size: 34px;
    font-weight: 700;
    line-height: 3;
    color: #181818;
  }
   
  .description {
    font-size: 14px;
    letter-spacing: .25px;
    text-align: center;
    line-height: 1.6;
  }
   
  .button {
    width: 180px;
    height: 50px;
    border-radius: 25px;
    margin-top: 50px;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 1.15px;
    background-color: #ff0000;
    color: #f9f9f9;
    box-shadow: 8px 8px 16px #d1d9e6, -8px -8px 16px #f9f9f9;
    border: none;
    outline: none;
  }
   
  .a-container {
    z-index: 100;
    left: calc(100% - 600px );
  }
   
  .b-container {
    left: calc(100% - 600px );
    z-index: 0;
  }
   
  .switch {
    display: flex;
    justify-content: center;
    align-items: center;
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 400px;
    padding: 50px;
    z-index: 200;
    transition: 1.25s;
    background-color: #ecf0f3;
    overflow: hidden;
    box-shadow: 4px 4px 10px #d1d9e6, -4px -4px 10px #f9f9f9;
  }
  .switch__circle {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background-color: #ecf0f3;
    box-shadow: inset 8px 8px 12px #d1d9e6, inset -8px -8px 12px #f9f9f9;
    bottom: -60%;
    left: -60%;
    transition: 1.25s;
  }
  .switch__circle--t {
    top: -30%;
    left: 60%;
    width: 300px;
    height: 300px;
  }
  .switch__container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    position: absolute;
    width: 400px;
    padding: 50px 55px;
    transition: 1.25s;
  }
  .switch__button {
    cursor: pointer;
  }
  .switch__button:hover {
    box-shadow: 6px 6px 10px #d1d9e6, -6px -6px 10px #f9f9f9;
    transform: scale(0.985);
    transition: .25s;
  }
  .switch__button:active, .switch__button:focus {
    box-shadow: 2px 2px 6px #d1d9e6, -2px -2px 6px #f9f9f9;
    transform: scale(0.97);
    transition: .25s;
  }
   
  .is-txr {
    left: calc(100% - 400px );
    transition: 1.25s;
    transform-origin: left;
  }
   
  .is-txl {
    left: 0;
    transition: 1.25s;
    transform-origin: right;
  }
   
  .is-z200 {
    z-index: 200;
    transition: 1.25s;
  }
   
  .is-hidden {
    visibility: hidden;
    opacity: 0;
    position: absolute;
    transition: 1.25s;
  }
   
  .is-gx {
    animation: is-gx 1.25s;
  }
   
  @keyframes is-gx {
    0%, 10%, 100% {
      width: 400px;
    }
    30%, 50% {
      width: 500px;
    }
  }