:root {
    --tear-rotation: 5deg; /* Initial value */
    --tear-rotation-25: 7deg;
    --tear-out-rotation-25: 7deg;
    --side: 1;
  }

p {
    margin: 0 0 3px;
    line-height: 1;
    letter-spacing: 1px;
    pointer-events: none;
}

.calendar {
    position: relative;
    width: 152px;
    cursor: default;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}
.calendar::before, .calendar::after {
    content: "";
    position: absolute;
    top: -28px;
    left: 40px;
    width: 10px;
    height: 10px;
    border-radius: 5px;
    background: #ddd;
    z-index: 3;
}
.calendar::after {
    left: initial;
    right: 40px;
}

.page {
    position: relative;
    background: white;
    height: 520px;
}

.page::before {
    background: linear-gradient(-45deg, #ffffff 14px, #dddddd 15px, #bbbbbb 16px, transparent 20px, transparent 0), linear-gradient(45deg, #ffffff 16px, #dddddd 15px, #bbbbbb 14px, transparent 14px);
    background-repeat: repeat-x;
    background-size: 32px 32px;
    content: " ";
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    transform: translateY(-24px);
    width: 100%;
    height: 24px;
}


.tear {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    /* transform-origin: top left; */
    box-shadow: 0 0 10px -1px rgba(0, 0, 0, 0.5);
    /* pointer-events: none; */
}

@keyframes tear-animation {
    0% {
        transform: rotate(0deg);
        top: 0;
        opacity: 1;
    }
    25% {
        transform: rotate(9deg);
        top: 0;
        opacity: 1;
    }
    100% {
        opacity: 0;
        top: 6000px;
    }
}

/* @keyframes tear-right-animation {
    0% {
        transform: rotate(0deg);
        top: 0;
        opacity: 1;
    }
    25% {
        transform: rotate(3deg);
        top: 0;
        opacity: 1;
    }
    100% {
        transform: rotate(5deg);
        opacity: 1;
        top: 0;
    }
} */

@keyframes tear-right-animation {
    0% {
      transform: rotate(0deg);
      top: 0;
      opacity: 1;
    }
    /* 25% {
      transform: rotate(calc(var(--tear-rotation) - 2deg));
      top: 0;
      opacity: 1;
    } */
    100% {
      transform: rotate(var(--tear-rotation));
      opacity: 1;
      top: 0;
    }
  }

  @keyframes tear-out-right {
    0% {
        transform: rotate(var(--tear-rotation));
        top: 0;
        opacity: 1;
    }
    /* 25% {
        transform: rotate(calc(var(--tear-rotation) + 2deg));
        top: 0;
        opacity: 1;
    } */
    100% {
        opacity: 1;
        top: 0;
        top: 6000px;
    }
}

/* @keyframes tear-out-right {
    0% {
        transform: rotate(5deg);
        top: 0;
        opacity: 1;
    }
    25% {
        transform: rotate(9deg);
        top: 0;
        opacity: 1;
    }
    100% {
        opacity: 1;
        top: 0;
        top: 6000px;
    }
} */