@charset "utf-8";

/* 整个页面的设置 */
.blog-page {
  min-width: 320px;
  min-height: 100dvh;
  overflow: hidden;
  background:
    radial-gradient(
      circle at 50% 38%,
      #f8fffc 0 18%,
      #ffffff 58%,
      #ffffff 100%
    );
}

.exit-button {
  position: absolute;
  align-items: center;
  justify-content: center;
  display: flex;
  font-size: 20px;
  width: 50px;
  height: 50px;
  z-index: 4;
  right: 5%;
  bottom: 5%;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.04);
  /* border: 1px solid rgba(30, 40, 34, 0.3); */
}

.exit-button:hover {
  color:#ff0000;
  /* background-color: #ff0000; */
  /* border: 1px solid rgba(30, 40, 34, 0.5); */
}

/* 用来装所有文件夹们的位置,设置相机，焦距等等 */
.blog-main {
  position: relative;
  width: 100%;
  height: 100dvh;
  overflow-x: auto;
  overflow-y: hidden;

  perspective: 2500px;
  perspective-origin:50% 48%;

  transform-style: preserve-3d;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling:touch;

  scrollbar-width: thin;
  scrollbar-color:
    rgba(40, 65, 57, 0.45)
    rgba(225, 239, 233, 0.4);
}

.blog-main::-webkit-scrollbar {
  height: 8px;
}

.blog-main::-webkit-scrollbar-track {
  background:
    rgba(225, 239, 233, 0.4);
}

.blog-main::-webkit-scrollbar-thumb {
  background:
    rgba(40, 65, 57, 0.45);
}

/* 设置文件夹轨道，根据文件夹数量横向自动变长 */
.blog-track {
  position: relative;
  
  display: flex;
  align-items: center;
  width: max-content;
  /* min-width: 100%; */
  height: 100%;

  padding:0 24vw;
  transform-style: preserve-3d;
}

/* 单个档案文件夹的总设置,这是一个a要素 */
.blog-folder {
  /* outline: 1px solid red; */
  --folder-size:128px;/*设置文件夹的大小尺幅*/
  position: relative;
  z-index: 2;
  
  flex:0 0 var(--folder-size); /*??????*/
  margin-right: -50px; /* 控制两个文件夹之间的间距*/
  
  display: block;
  width: var(--folder-size);
  color: #18201d;
  text-decoration: none;
  transform-style: preserve-3d;
  transform: 
    translate3d(
      var(--folder-x, 0px),
      var(--folder-y, 0px),
      var(--folder-z, 0px)
    )
    
    ;
}

/* 包含在a要素中，控制文字，文件夹素材图片前后两张，中间纸张 */
.blog-folder-stage {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 6 / 5;

  transform-style: preserve-3d;
  transform-origin: left center;
  transform: 
    rotateX(var(--folder-rotate-x,0deg))
    rotateY(var(--folder-rotate-y,72deg));
    
  transition:
    transform 500ms cubic-bezier(0.22, 0.7, 0.2, 1),
    filter 400ms ease;
    /* 这里在设置什么我没理解 */
}

.blog-folder-back,
.blog-folder-front,
.blog-folder-paper {
  position: absolute;
  image-rendering: pixelated;
}

.blog-folder-back {
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  image-rendering: pixelated;

}

.blog-folder-paper {
  z-index: 2;

  top: 20%;
  left: 3%;
  width: 80%;
  height: 60%;

  box-sizing: border-box;
  padding: 10px;

  color: #16201c;
  background-color: #e9eee7;
  background-size: 100% 17px;
  border: 1px solid rgba(29, 48, 41, 0.35);

  display: flex;
  flex-direction: column;
  gap: 5px;

  transform: translateZ(2px);

  transition:
    /* transform 350ms steps(5,end); */
    transform 500ms cubic-bezier(0.22, 0.7, 0.2, 1);
    
  /* image-rendering: pixelated; */
}

.blog-folder-paper-title {
  font-family:
    SimSun,
    "Songti SC",
    serif;

  font-size: 13px;
  font-weight: normal;
}

.blog-folder-paper-number,
.blog-folder-paper-date {
  font-family:
    "Courier New",
    monospace;

  font-size: 8px;
  letter-spacing: 0.08em;
}

.blog-folder-name {
  /* outline: auto; */
  position: absolute;

  left: 0;
  top: calc(100% + 20px);

  display: block;
  
  text-align: left;
  transform-style: preserve-3d;
  transform-origin: left top;
  transform: 
  rotateY(0deg)
  rotateX(60deg);
  writing-mode: vertical-lr;
  text-orientation: upright;
  white-space: nowrap;
}

.blog-folder-front {
  z-index: 3;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;

  pointer-events: none;
  image-rendering: pixelated;

  transform-origin: center bottom;
  transform: translateZ(4px);

  transition:
    /* transform 650ms cubic-bezier(0.22, 0.7, 0.2, 1); */
    transform 350ms steps(5, end);
}

.blog-folder:hover .blog-folder-paper,
.blog-folder:focus-visible .blog-folder-paper {
  transform: translateY(-50px)
  translateZ(6px)
  /* translateX(-90px) */
  rotateY(0deg);
  
  
}

.blog-folder:hover .blog-folder-front,
.blog-folder:focus-visible .blog-folder-front {
  transform: 
    translateZ(7px)
    rotateX(-5deg);
}

.blog-folder.is-opening .blog-folder-paper {
  transform:
    translateY(-60px)
    translateZ(10px)
    scale(1.12);

  filter:
    brightness(1.2)
    drop-shadow(
      0 0 24px
      rgba(235, 255, 248, 0.9)
    );
}

.blog-folder.is-opening .blog-folder-front {
  transform:
    translateZ(12px)
    rotateX(-7deg)
    translateY(8px);
}