:root {
  --background: #fff;
  --text: #000;
  --text-secondary: #666;
  --spinner-border: #000;
  --spinner-border-top: transparent;
  --dot-color: #000;
  --grid-color: rgba(0,0,0,0.05);
  --gradient-color: rgba(0,0,0,0.03);
}

@media (prefers-color-scheme: dark) {
  :root {
      --background: #000;
      --text: #fff;
      --text-secondary: #888;
      --spinner-border: #fff;
      --spinner-border-top: transparent;
      --dot-color: #fff;
      --grid-color: rgba(255,255,255,0.05);
      --gradient-color: rgba(255,255,255,0.03);
  }
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--background);
  color: var(--text);
  padding: 20px;
  line-height: 1.5;
  transition: background-color 0.3s ease, color 0.3s ease;
}
.container {
  text-align: center;
  max-width: 600px;
}
h1.title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}
p.description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}
.spinner {
  width: 40px;
  height: 40px;
  margin: 2rem auto;
  position: relative;
}
.spinner::before {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border: 2px solid var(--spinner-border);
  border-top-color: var(--spinner-border-top);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
.dots {
  display: flex;
  justify-content: center;
  gap: 4px;
  margin-top: 2rem;
}
.dot {
  width: 4px;
  height: 4px;
  background: var(--dot-color);
  border-radius: 50%;
  animation: fade 1.4s infinite ease-in-out;
}
.dot:nth-child(1) { animation-delay: -0.32s; }
.dot:nth-child(2) { animation-delay: -0.16s; }
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes fade {
  0%, 80%, 100% { opacity: 0; }
  40% { opacity: 1; }
}
.grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image: 
      linear-gradient(to right, var(--grid-color) 1px, transparent 1px),
      linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
  background-size: 24px 24px;
  transition: background-image 0.3s ease;
}
.gradient {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background: radial-gradient(circle at center, var(--gradient-color) 0%, transparent 50%);
  transition: background 0.3s ease;
}

.footer {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-link {
  color: var(--text);
  text-decoration: none;
  font-weight: bold;
}