* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #0a0a0a;
  color: #ffffff;
  font-family: 'SF Mono', 'Monaco', 'Cascadia Code', monospace;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 4rem 2rem;
}

.container {
  max-width: 680px;
  width: 100%;
  margin: 0 auto;
}

h1 {
  font-size: 32px;
  margin-bottom: 3rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  text-align: center;
}

.grid {
  display: grid;
  grid-template-columns: repeat(10, 48px);
  gap: 12px;
  justify-content: center;
}

/* Tablet */
@media (max-width: 768px) {
  body {
    padding: 2rem 1.5rem;
  }

  h1 {
    font-size: 24px;
    margin-bottom: 2rem;
  }

  .grid {
    grid-template-columns: repeat(5, 48px);
    gap: 10px;
  }
}

/* Mobile */
@media (max-width: 480px) {
  body {
    padding: 1.5rem 1rem;
  }

  h1 {
    font-size: 20px;
    margin-bottom: 1.5rem;
  }

  .grid {
    grid-template-columns: repeat(4, 40px);
    gap: 8px;
  }

  .loader-cell {
    width: 40px;
    height: 40px;
  }

  .loader-cell canvas {
    width: 20px;
    height: 20px;
  }

  .group-title {
    font-size: 12px;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
  }

  .hover-info {
    bottom: 1rem;
    left: 1rem;
    font-size: 11px;
    padding: 0.75rem;
  }
}

.group-title {
  grid-column: 1 / -1;
  font-size: 14px;
  font-weight: 500;
  color: #666;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}

.group-title:first-child {
  margin-top: 0;
}

.loader-cell {
  position: relative;
  width: 48px;
  height: 48px;
  border: 1px solid #222;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s;
  cursor: pointer;
}

.loader-cell:hover {
  border-color: #666;
}

.loader-cell canvas {
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: 24px;
  height: 24px;
}

.hover-info {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  padding: 1rem;
  background: #111;
  border: 1px solid #333;
  border-radius: 4px;
  font-size: 12px;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}

.hover-info.visible {
  opacity: 1;
}

.hover-info .group {
  color: #888;
  margin-bottom: 0.25rem;
}

.hover-info .index {
  color: #666;
}