div.main-wrapper
  div.signboard-wrapper
    div.signboard CLOSED
    div.string
    div.pin.pin1
    div.pin.pin2
    div.pin.pin3

$pin-size: 5vmin;

$main-wrapper-font-size: 15vmin;
$main-wrapper-background-color: #ffffff;

$signboard-wrapper-width: 75vmin;
$signboard-wrapper-height: 55vmin;
$signboard-margin: 20px;
$signboard-wrapper-transform-origin: center #{$pin-size / 2};
$signboard-wrapper-init-time: 1000ms;
$signboard-wrapper-init-sign-move-time: 1000ms;
$signboard-wrapper-sign-move-time: 3000ms;
$signboard-wrapper-sign-move-delay-time: $signboard-wrapper-init-time + $signboard-wrapper-init-sign-move-time;
$signboard-wrapper-rotation-degree: 3deg;
$signboard-wrapper-border-radius: 4vmin;

$signboard-color: #ffffff;
$signboard-background-color: #ff5625;
$signboard-height: 35vmin;
$signboard-text-shadow-color: darken($signboard-background-color, 20%);
$signboard-box-shadow: 0 2vmin 4vmin 1vmin rgba(#6b6b6b, 0.8);

$string-width: 30vmin;
$string-height: 30vmin;
$string-border-width: 0.9vmin;
$string-border-color: #893d00;

$pin-width: $pin-size;
$pin-height: $pin-size;
$pin-pin1-background-color: #9f9f9f;
$pin-pin2-3-background-color: darken($signboard-background-color, 15%);
$pin-pin2-3-x: 13vmin;
$pin-pin2-3-y: 21.5vmin;

@import url("https://fonts.googleapis.com/css?family=Open+Sans:400,400i,700");

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

.signboard-wrapper {
  width: $signboard-wrapper-width;
  height: $signboard-wrapper-height;
  margin: $signboard-margin;
  position: relative;
  flex-shrink: 0;
  transform-origin: $signboard-wrapper-transform-origin;
  animation:
    $signboard-wrapper-init-time init forwards,
    $signboard-wrapper-init-sign-move-time init-sign-move ease-out $signboard-wrapper-init-time,
    $signboard-wrapper-sign-move-time sign-move $signboard-wrapper-sign-move-delay-time infinite;
  .signboard {
    color: $signboard-color;
    font-family: "Open Sans", sans-serif;
    font-weight: bold;
    background-color: $signboard-background-color;
    width: 100%;
    height: $signboard-height;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    bottom: 0;
    border-radius: $signboard-wrapper-border-radius;
    text-shadow: 0 -0.015em $signboard-text-shadow-color;
    box-shadow: $signboard-box-shadow;
  }
  .string {
    width: $string-width;
    height: $string-height;
    border: solid $string-border-width $string-border-color;
    border-bottom: none;
    border-right: none;
    position: absolute;
    left: 50%;
    transform-origin: top left;
    transform: rotate(45deg);
  }
  .pin {
    width: $pin-width;
    height: $pin-height;
    position: absolute;
    border-radius: 50%;
    &.pin1 {
      background-color: $pin-pin1-background-color;
      top: 0;
      left: calc(50% - #{$pin-width / 2});
    }
    &.pin2, &.pin3 {
      background-color: $pin-pin2-3-background-color;
      top: $pin-pin2-3-y;
    }
    &.pin2 {
      left: $pin-pin2-3-x;
    }
    &.pin3 {
      right: $pin-pin2-3-x;
    }
  }
}

@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($signboard-wrapper-rotation-degree); }
}

@keyframes sign-move {
  0%   { transform: rotate($signboard-wrapper-rotation-degree); }
  50%  { transform: rotate(-$signboard-wrapper-rotation-degree); }
  100% { transform: rotate($signboard-wrapper-rotation-degree); }
}