#loading {
  z-index:10000;
}
.loading-preview-ui {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-content {
  text-align: center;
  color: white;
  padding: 40px;
  max-width: 400px;
}

.loading-spinner {
  position: relative;
  width: 80px;
  height: 80px;
  margin: 0 auto 30px auto;
}

.spinner-ring {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 3px solid transparent;
  border-top: 3px solid #4C4CEF;
  border-radius: 50%;
  animation: spin 1.5s linear infinite;
}

.spinner-ring:nth-child(2) {
  width: 60px;
  height: 60px;
  top: 10px;
  left: 10px;
  border-top-color: #BB55FF;
  animation-duration: 1.2s;
  animation-direction: reverse;
}

.spinner-ring:nth-child(3) {
  width: 40px;
  height: 40px;
  top: 20px;
  left: 20px;
  border-top-color: #7C7CFF;
  animation-duration: 0.9s;
}

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

.loading-title {
  margin: 0 0 12px 0;
  font-size: 24px;
  font-weight: 600;
  color: #FFFFFF;
  letter-spacing: 0.5px;
}

.loading-subtitle {
  margin: 0 0 30px 0;
  font-size: 14px;
  color: #BCBCBC;
  line-height: 1.4;
  opacity: 0.8;
}

.loading-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
}

.dot {
  width: 8px;
  height: 8px;
  background: #4C4CEF;
  border-radius: 50%;
  animation: dotPulse 1.4s ease-in-out infinite both;
}

.dot:nth-child(1) { animation-delay: -0.32s; }
.dot:nth-child(2) { animation-delay: -0.16s; }
.dot:nth-child(3) { animation-delay: 0s; }

@keyframes dotPulse {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1.2);
    opacity: 1;
  }
}

:root {
  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: rgba(255, 255, 255, 0.87);
  background-color: #242424;

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  font-weight: 500;
  color: #646cff;
  text-decoration: inherit;
}
a:hover {
  color: #535bf2;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
  background-color: #212121;
}

/* 全局去掉焦点边框 */
*:focus {
  outline: none;
}

*:focus-visible {
  outline: none;
}

h1 {
  font-size: 3.2em;
  line-height: 1.1;
}

button {
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0.6em 1.2em;
  font-size: 1em;
  font-weight: 500;
  font-family: inherit;
  background-color: #1a1a1a;
  cursor: pointer;
  transition: border-color 0.25s;
}
button:hover {
  border-color: #646cff;
}
button:focus,
button:focus-visible {
  outline: none;
}

.card {
  padding: 2em;
}

#app {
  width: 100vw;
  height: 100vh;
  height: 100dvh;
}

@media (prefers-color-scheme: light) {
  :root {
    color: #213547;
    background-color: #ffffff;
  }
  a:hover {
    color: #747bff;
  }
  button {
    background-color: #f9f9f9;
  }
}