:root {
  color-scheme: light;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
}

/* 过渡过程中禁止滚动，防止晃动 */
body.zooming {
  overflow: hidden;
  cursor: default;
}

.show-page {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 整个“圆盘”容器 */
.main {
  display: flex;
  flex-direction: column;
  gap: 0.75em;
  opacity: 0;
  transform: scale(0.75);
  transform-origin: center center;
  animation: circle-enter 1.5s ease-out forwards;
}

/* 上下两行，各放两个卡片 */
.up,
.down {
  display: flex;
  flex-direction: row;
  gap: 0.75em;
}

/* 单个扇形卡片 */
.card {
  --size: min(22vh, 140px);

  width: var(--size);
  height: var(--size);
  background: #ffffff;
  border-radius: 5px;
  border: 3px solid #2d2d2d;
  box-shadow: 6px 6px 0px #2d2d2d;

  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;

  transform-origin: center center;

  transition:
    transform 1.2s cubic-bezier(0.7, 0, 0.3, 1),
    box-shadow 0.6s ease-out,
    opacity 0.4s ease-out,
    background-color 0.9s ease-out,
    border-color 0.9s ease-out,
    filter 0.9s ease-out;
}

/* 四分之一圆 */
.card1 {
  border-radius: 999px 5px 5px 5px;
  padding-top: 12px;
  padding-left: 12px;
}
.card2 {
  border-radius: 5px 999px 5px 5px;
  padding-top: 12px;
  padding-right: 12px;
}
.card3 {
  border-radius: 5px 5px 5px 999px;
  padding-bottom: 10px;
  padding-left: 12px;
}
.card4 {
  border-radius: 5px 5px 999px 5px;
  padding-bottom: 12px;
  padding-right: 12px;
}

/* 图标基础样式 */
.icon {
  transition: fill 0.9s ease-out, transform 0.9s ease-out;
}

/* 默认图标颜色 */
.icon-music {
  fill: #e1306c;
}
.icon-game {
  fill: #1da1f2;
}
.icon-camera {
  fill: #333333;
}
.icon-social {
  fill: #00a849;
}

/* 悬停效果（非 zoom 状态下才有意义） */
.card:hover {
  cursor: pointer;
  transform: translate(-6px, -6px);
  box-shadow: 12px 12px 0px #2d2d2d;
}
.card1:hover {
  background-color: #fd1d1d;
}
.card2:hover {
  background-color: #24a0ed;
}
.card3:hover {
  background-color: #f7b733;
}
.card4:hover {
  background-color: #4cd137;
}
.card:hover svg {
  fill: #ffffff;
}

/* 入场动画：从小+虚到略微放大再回到 1 */
@keyframes circle-enter {
  0% {
    opacity: 0;
    transform: scale(0.75);
    filter: blur(6px);
  }
  70% {
    opacity: 1;
    transform: scale(1.03);
    filter: blur(0);
  }
  100% {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
  }
}

/* 小屏适配 */
@media (max-width: 480px) {
  .card {
    --size: 100px;
    box-shadow: 4px 4px 0px #2d2d2d;
  }
}

/* ====== 点击后的放大 & 洗成白色 ====== */

/* zooming 状态：不允许再次 hover / 点击打断动画 */
body.zooming .card {
  pointer-events: none;
}

/* 被点击的那一块 */
body.zooming .card--zoom {
  box-shadow: 0 0 0 rgba(0, 0, 0, 0);
  border-color: #ffffff;
  background-color: #ffffff;
  filter: blur(0.5px);
  z-index: 10;
}

/* 被点击的那一块里的图标：逐渐变白，略微放大一点 */
body.zooming .card--zoom .icon {
  fill: #ffffff;
  transform: scale(1.2);
}

/* 其他三个：快速淡出并略缩小 */
body.zooming .card:not(.card--zoom) {
  opacity: 0;
  transform: scale(0.8);
  filter: blur(4px);
}