.main-wrapper {
    font-size: 7vmin;
    background-color: #ffffff;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.signboard-wrapper {
    width: 75vmin;
    height: 55vmin;
    margin: 20px;
    position: relative;
    flex-shrink: 0;
    transform-origin: center 2.5vmin;
    animation: 1000ms init forwards, 1000ms init-sign-move ease-out 1000ms, 3000ms sign-move 2000ms infinite;
}
.signboard-wrapper .signboard {
    color: #ffffff;
    font-family: "Open Sans", sans-serif;
    font-weight: bold;
    background-color: green;
    width: 100%;
    height: 35vmin;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    bottom: 0;
    border-radius: 4vmin;
    text-shadow: 0 -0.015em #be2b00;
    box-shadow: 0 2vmin 4vmin 1vmin rgba(107, 107, 107, 0.8);
}
.signboard-wrapper .string {
    width: 31vmin;
    height: 31vmin;
    border: solid 0.9vmin #001800;
    border-bottom: none;
    border-right: none;
    position: absolute;
    left: 50%;
    transform-origin: top left;
    transform: rotate(45deg);
}
.signboard-wrapper .pin {
    width: 5vmin;
    height: 5vmin;
    position: absolute;
    border-radius: 50%;
}
.signboard-wrapper .pin.pin1 {
    background-color: #9f9f9f;
    top: 0;
    left: calc(50% - 2.5vmin);
}
.signboard-wrapper .pin.pin2, .signboard-wrapper .pin.pin3 {
    background-color: #003e00;
    top: 21.5vmin;
}
.signboard-wrapper .pin.pin2 {
    left: 13vmin;
}
.signboard-wrapper .pin.pin3 {
    right: 13vmin;
}

@keyframes init {
    0% {
        transform: scale(0);
    }
    40% {
        transform: scale(1.1);
    }
    60% {
        transform: scale(0.9);
    }
    80% {
        transform: scale(1.05);
    }
    100% {
        transform: scale(1);
    }
}
@keyframes init-sign-move {
    100% {
        transform: rotate(3deg);
    }
}
@keyframes sign-move {
    0% {
        transform: rotate(3deg);
    }
    50% {
        transform: rotate(-3deg);
    }
    100% {
        transform: rotate(3deg);
    }
}