* {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: cursive, serif;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100vh;
}

.footer {
  position: absolute;
  bottom: 15px;
  display: flex;
  justify-content: space-between;
  padding-right: 70px;
  /* left: 35px; */
  width: 100%;
  font-size: 2rem;
  font-weight: bold;
  box-sizing: border-box;
}

.footer .footer_goal,
.footer .footer_level {
  color: #fff;
}

.canvas_wrap {
  position: relative;
  padding: 15px 35px 85px 35px;
  border-radius: 45px;
  background-color: #8ead8e;
  box-shadow: 0px 0px 0px 20px #383737;
}

/* 菜单难度选择 */
.menu_wrap {
  display: block;
}

.menu_level {
  position: absolute;
  z-index: 1;
  left: 0;
  top: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 15px 35px 85px 35px;
  width: 100%;
  height: 100%;
  border-radius: 45px;
  font-size: 2rem;
  font-weight: bold;
  color: #fff;
  background-color: #8ead8e;
  box-shadow: 0px 0px 0px 20px #383737;
  box-sizing: border-box;
}

.menu_level .menu_level_header {
  margin-bottom: 2rem;
  font-size: 3rem;
  text-shadow: 0 0 4px #4c4c4c;
}

.menu_level #menu_level_select {
  padding: 1rem 2rem;
  width: 200px;
  font-size: 2rem;
  border: 1px solid #ccc;
  cursor: pointer;
  outline: none;
  border-radius: 5px;
  transition: all 0.3s ease-in-out;
  box-shadow: 0 0 3px 1px #b9b9b9;
}

.menu_level #menu_level_select:hover {
  transform: scale(1.05);
}

.menu_level .submit_btn {
  margin-top: 2rem;
  padding: 1rem 2rem;
  font-size: 2rem;
  border: 1px solid #ccc;
  cursor: pointer;
  outline: none;
  border-radius: 5px;
  box-shadow: 0 0 4px 1px #cacaca;
  transition: all 0.5s ease-in-out;
}

.menu_level .submit_btn:hover {
  box-shadow: inset 0px 0 20px 2px #ccc;
  transform: scale(1.1);
}

.menu_level .music {
  margin-top: 1rem;
  padding: 1rem 2rem;
  cursor: pointer;
  text-shadow: 0 0 4px #4c4c4c;
}

.tip {
  padding-bottom: 10px;
  text-align: center;
  font-size: 1.2rem;
  color: #3c3c3c;
}

.tip .highlight {
  font-weight: bold;
  font-size: 1.3rem;
}

.canvas_wrap #canvas {
  border: 3px solid #000;
}

/* 结果得分 */
.goal {
  position: absolute;
  left: 0;
  top: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  font-size: 2rem;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.5);
}

/* 重新开始 和 返回菜单*/
.goal .reloadBtn,
.goal .returnMenu {
  margin: 50px 30px;
  padding: 8px 12px;
  font-size: 1.5rem;
  outline: none;
  background-color: #505050;
  color: #fff;
  border: 1px solid #ccc;
  cursor: pointer;
  border-radius: 5px;
}
.goal .reloadBtn:hover,
.goal .returnMenu:hover {
  background-color: #000;
}

/* 暂停游戏界面 */
.pause {
  position: absolute;
  left: 0;
  top: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
  font-size: 2rem;
  color: #fff;
  background-color: rgba(0, 0, 0, 0.5);
}