/* ------------------------------------------
 * IT书包
 * 网址：www.itshubao.com
 * 整理：yinq<3331653644@qq.com> 
 -------------------------------------------- */

* {
  position: relative;
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

html {
  background-color: #000;
}

body {
  overflow: hidden;
  color: rgba(255, 255, 255, 0.5);
  font-family: "Microsoft YaHei", arial, sans-serif;
  line-height: 1.25;
  letter-spacing: 0.06em;
}

.hide {
  opacity: 0;
  visibility: hidden;
}

.remove {
  display: none;
}

.blur {
  -webkit-filter: blur(12px);
          filter: blur(12px);
}

.container {
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}

#loading-init {
  width: 100%;
  -ms-flex-item-align: center;
      -ms-grid-row-align: center;
      align-self: center;
  text-align: center;
  font-size: 2em;
}

#stage-container {
  overflow: hidden;
  box-sizing: initial;
  border: 1px solid #222;
  margin: -1px;
}

#canvas-container {
  width: 100%;
  height: 100%;
  -webkit-transition: -webkit-filter 0.3s;
  transition: -webkit-filter 0.3s;
  transition: filter 0.3s;
  transition: filter 0.3s, -webkit-filter 0.3s;
}
#canvas-container canvas {
  position: absolute;
  mix-blend-mode: lighten;
}

#controls {
  position: absolute;
  top: 0;
  width: 100%;
  padding-bottom: 50px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-transition: opacity 0.3s, visibility 0.3s;
  transition: opacity 0.3s, visibility 0.3s;
}
@media (min-width: 800px) {
  #controls {
    visibility: visible;
  }
  #controls.hide:hover {
    opacity: 1;
  }
}

#menu {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  position: absolute;
  top: 0;
  bottom: 0;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.42);
  -webkit-transition: opacity 0.3s, visibility 0.3s;
  transition: opacity 0.3s, visibility 0.3s;
}
#menu__header {
  padding: 20px 0 44px;
  font-size: 2em;
  text-transform: uppercase;
}
#menu form {
  width: 240px;
  padding: 0 20px;
  overflow: auto;
}
#menu .form-option {
  margin: 20px 0;
}
#menu .form-option label {
  text-transform: uppercase;
}
#menu .form-option--select label {
  display: block;
  margin-bottom: 6px;
}
#menu .form-option--select select {
  display: block;
  width: 100%;
  height: 30px;
  font-size: 1rem;
  font-family: "Russo One", arial, sans-serif;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.06em;
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.5);
}
#menu .form-option--select select option {
  background-color: black;
}
#menu .form-option--checkbox label {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-transition: opacity 0.3s;
  transition: opacity 0.3s;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}
#menu .form-option--checkbox input {
  display: block;
  width: 20px;
  height: 20px;
  margin-right: 8px;
  opacity: 0.5;
}
@media (max-width: 800px) {
  #menu .form-option select, #menu .form-option input {
    outline: none;
  }
}

#close-menu-btn {
  position: absolute;
  top: 0;
  right: 0;
}

.btn {
  opacity: 0.16;
  width: 44px;
  height: 44px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
  cursor: default;
  -webkit-transition: opacity 0.3s;
  transition: opacity 0.3s;
}
.btn--bright {
  opacity: 0.5;
}
@media (min-width: 800px) {
  .btn:hover {
    opacity: 0.32;
  }
  .btn--bright:hover {
    opacity: 0.75;
  }
}
.btn svg {
  display: block;
  margin: auto;
}