.video-background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -3;
  opacity: 1;
  transition: opacity 0.5s ease;
}

.video-background video {
  width: 100%;
  height: 100%;
  position: absolute;
  object-fit: cover;
}

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: #7cc6ffcc;
}

::-webkit-scrollbar-thumb {
  background: #7cc6ffcc;
}

::-webkit-scrollbar-thumb:hover {
  background: #7db8ff;
}

body ::selection {
  background: #91ceff;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
  
body {
  font-family: 'ZHFont', sans-serif;
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: calc(100 * var(--vh, 1vh));
  overflow-x: hidden;
}
 

.compass-container {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 150px;
  height: 150px;
  z-index: 10;
  perspective: 500px;
}

.center-img {
  position: absolute;
  width: 100%;
  height: 100%;
  animation: slowSpin 60s linear infinite;
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.5));
}

.compass-img {
  position: absolute;
  width: 80%;
  height: 80%;
  top: 10%;
  left: 10%;
  transform-origin: center;
  transition: transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.7));
}

@keyframes slowSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.constellations-wrapper {
  position: absolute;
  top: 150px;
  left: 0;
  width: 100%;
  height: calc(100% - 150px);
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.constellation-container {
  position: relative;
  width: 30%;
  height: 70%;
  transition: all 0.7s cubic-bezier(0.34, 1.56, 0.64, 1);
  perspective: 1000px;
  transform-style: preserve-3d;
}

.constellation {
  position: absolute;
  width: 100%;
  height: 100%;
  transition: all 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
  transform-origin: center;
  opacity: 0.6;
  transform: scale(0.9);
  will-change: transform, opacity;
}

.constellation.active {
  opacity: 1;
  transform: scale(1.1) translateZ(50px);
  z-index: 2;
}

.constellation.inactive {
  opacity: 0.3;
  transform: scale(0.85) translateZ(-50px);
  z-index: 1;
}

.star {
  position: absolute;
  width: 30px;
  height: auto;
  margin-left: -15px;
  margin-top: -15px;
  filter: drop-shadow(0 0 10px rgba(255, 255, 255, 0.8));
  animation: twinkle 3s infinite alternate;
  z-index: 1;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  will-change: transform, filter;
}

.star:hover {
  transform: scale(1.3);
  filter: drop-shadow(0 0 15px rgba(255, 255, 255, 1));
}

.star.bright {
  width: 32px;
  height: 32px;
  margin-left: -16px;
  margin-top: -16px;
  filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.9));
}

.star.selected {
  transform: scale(1.5);
  filter: drop-shadow(0 0 20px rgba(255, 255, 255, 1));
  z-index: 10;
}

.line {
  position: absolute;
  background: linear-gradient(to right, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.3));
  height: 3px;
  transform-origin: 0 0;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.9);
  z-index: 0;
  animation: pulseLine 4s infinite alternate;
  will-change: opacity;
}

@keyframes pulseLine {
  0% { opacity: 0.5; box-shadow: 0 0 8px rgba(255, 255, 255, 0.7); }
  50% { opacity: 0.8; box-shadow: 0 0 15px rgba(255, 255, 255, 0.9); }
  100% { opacity: 0.5; box-shadow: 0 0 8px rgba(255, 255, 255, 0.7); }
}

@keyframes twinkle {
  0% { opacity: 0.7; filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.7)); }
  50% { opacity: 1; filter: drop-shadow(0 0 15px rgba(255, 255, 255, 1)); }
  100% { opacity: 0.7; filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.7)); }
}

.constellation-label {
  position: absolute;
  color: rgba(255, 255, 255, 0.9);
  font-size: 24px;
  text-shadow: 0 0 10px rgba(255, 255, 255, 1);
  white-space: nowrap;
  font-weight: bold;
  z-index: 5;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.page-label {
  position: absolute;
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.8);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  pointer-events: none;
  z-index: 2;
  transform: translateY(0);
}

.star:hover + .page-label {
  opacity: 1;
  transform: translateY(-8px);
}

.category-buttons {
  position: absolute;
  top: 100px;
  left: 20px;
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.category-button {
  padding: 12px 20px;
  background: rgba(255, 255, 255, 0.179);
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: white;
  backdrop-filter: blur(5px);
  border-radius: 5px;
  cursor: pointer;
  font-family: 'ZHFont', sans-serif;
  margin-bottom: 15px;
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.8);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
  transition: all 0.3s ease;
  font-size: 16px;
}

.category-button:hover {
  background: rgba(255, 255, 255, 0.266);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
  transform: translateX(5px);
}

.category-button.active {
  background: rgba(255, 255, 255, 0.304);
  border: 1px solid rgba(255, 255, 255, 1);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.7);
  transform: translateX(10px);
}

.title-container {
  position: absolute;
  top: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  text-align: center;
}

.title-img {
  max-width: 800px;
  height: auto;
  filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.8));
}

.legend {
  position: absolute;
  bottom: 20px;
  left: 20px;
  z-index: 100;
}

.legend-img {
  max-width: 280px;
  height: auto;
  filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.6));
}

.you-are-here {
  color: #87cefa;
  text-shadow: 0 0 5px rgba(135, 206, 250, 0.8);
}

.view-controls {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  bottom: 20px;
  right: 800px;
  z-index: 100;
}

.current-location {
  background: rgba(255, 255, 255, 0.184);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 5px;
  padding: 10px;
  font-size: 14px;
  backdrop-filter: blur(10px);
  color: white;
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.8);
}

.tree-view-button {
  background: rgba(255, 255, 255, 0.184);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 5px;
  padding: 10px 15px;
  font-size: 14px;
  backdrop-filter: blur(10px);
  color: white;
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.8);
  cursor: pointer;
  transition: all 0.3s ease;
  font-family: 'ZHFont', sans-serif;
}

.tree-view-button:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.tree-view-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.085);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s cubic-bezier(0.19, 1, 0.22, 1);
}

.tree-view-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.tree-view-panel {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 10px;
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
  width: 80%;
  max-width: 800px;
  max-height: calc(80 * var(--vh, 1vh));
  padding: 25px;
  overflow-y: auto;
  transform: translateY(50px);
  transition: transform 0.5s cubic-bezier(0.19, 1, 0.22, 1);
  position: relative;
  color: white;
}

.tree-view-overlay.active .tree-view-panel {
  transform: translateY(0);
}

.tree-view-panel h3 {
  margin-top: 0;
  margin-bottom: 20px;
  font-size: 24px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding-bottom: 10px;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.file-tree {
  font-family: 'ZHFont', monospace;
  font-size: 14px;
  line-height: 1.6;
  white-space: pre;
  margin-left: 20px;
}

.tree-view-panel .close-button {
  position: absolute;
  top: 15px;
  right: 15px;
  background: none;
  border: none;
  font-size: 24px;
  color: white;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.tree-view-panel .close-button:hover {
  transform: scale(1.2);
  text-shadow: 0 0 10px rgba(255, 255, 255, 1);
}

.info-panel {
  position: absolute;
  top: 20px;
  left: 20px;
  width: 250px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  padding: 15px;
  color: white;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.4);
  z-index: 200;
  transform: translateY(-300px);
  opacity: 0;
  transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.5s ease;
}

.info-panel.active {
  transform: translateY(0);
  opacity: 1;
}

.info-panel h3 {
  margin-top: 0;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 1);
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.8);
}

.info-panel p {
  margin: 5px 0;
  font-size: 14px;
}

.info-panel .close-button {
  position: absolute;
  top: 10px;
  right: 10px;
  background: none;
  border: none;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.info-panel .close-button:hover {
  transform: scale(1.2);
}

.background-stars {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.bg-star {
  position: absolute;
  width: 2px;
  height: 2px;
  background-color: white;
  border-radius: 50%;
  opacity: 0.3;
  animation: bgTwinkle 4s infinite alternate;
  will-change: opacity;
}

@keyframes bgTwinkle {
  0% { opacity: 0.2; }
  100% { opacity: 0.5; }
}

.blur-layer {
  position: fixed;
  top: 0;
  left: 0;
  width: calc(100 * var(--vw, 1vw));
  height: calc(100 * var(--vh, 1vh));
  backdrop-filter: blur(5px);
  background-color: #00000041;
  -webkit-backdrop-filter: blur(10px); 
  z-index: -1; 
}

@media (max-width: 768px) {
  .title-container {
    top: 20px;
    width: 100%;
    padding: 0 56px;
  }

  .title-img {
    max-width: 100%;
  }

  .compass-container {
    top: auto;
    right: 16px;
    bottom: 96px;
    width: 72px;
    height: 72px;
  }

  .category-buttons {
    top: 150px;
    left: 50%;
    flex-direction: row;
    gap: 8px;
    transform: translateX(-50%);
  }

  .category-button {
    margin-bottom: 0;
    padding: 8px 10px;
    font-size: 13px;
    white-space: nowrap;
  }

  .category-button:hover,
  .category-button.active {
    transform: none;
  }

  .constellations-wrapper {
    top: 210px;
    height: calc(100% - 330px);
  }

  .constellation-label {
    font-size: 14px;
  }

  .legend {
    display: none;
  }

  .view-controls {
    right: auto;
    bottom: 96px;
    left: 16px;
  }
}