:root {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-surface-hover: #f0f1f3;
  --color-border: #e1e4e8;
  --color-text: #24292e;
  --color-text-dim: #6a737d;
  --color-accent: #7c5cdb;
  --color-accent-dim: #9678e5;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  width: 100%;
}

header {
  text-align: center;
  margin-bottom: 4rem;
  padding-top: 2rem;
}

h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  background: linear-gradient(135deg, #7c5cdb, #9678e5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 1.25rem;
  color: var(--color-text-dim);
  margin-bottom: 1.5rem;
}

.links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.links a {
  color: var(--color-accent);
  text-decoration: none;
  padding: 0.5rem 1.5rem;
  border: 1px solid var(--color-accent);
  border-radius: 6px;
  transition: all 0.2s;
}

.links a:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

main {
  flex: 1;
}

/* CDN Section */
.cdn-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2.5rem;
  margin-bottom: 3rem;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.cdn-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-dim));
}

.cdn-section h2 {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.cdn-description {
  color: var(--color-text-dim);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.cdn-container {
  margin-bottom: 1.5rem;
}

.version-selector-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.version-selector-container label {
  font-weight: 400;
  color: var(--color-text-dim);
  font-size: 0.875rem;
}

.version-select {
  background: transparent url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 12 12" width="12" height="12"><path d="M6 8.825c-.2 0-.4-.1-.5-.2l-3.3-3.3c-.3-.3-.3-.8 0-1.1.3-.3.8-.3 1.1 0l2.7 2.7 2.7-2.7c.3-.3.8-.3 1.1 0 .3.3.3.8 0 1.1l-3.2 3.2c-.2.2-.4.3-.6.3Z"/></svg>') no-repeat right 0.5rem center;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  padding: 0.4rem 2rem 0.4rem 0.6rem;
  border-radius: 6px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s;
  font-family: 'Courier New', monospace;
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.version-select:hover {
  border-color: var(--color-accent);
}

.version-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(124, 92, 219, 0.1);
}

.cdn-code-block {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--color-bg);
  border: 2px solid var(--color-accent);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
}

.cdn-code-block code {
  flex: 1;
  font-family: 'Courier New', monospace;
  font-size: 1rem;
  color: var(--color-accent);
  word-break: break-all;
  line-height: 1.5;
  font-weight: 500;
}

.copy-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.copy-btn:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.copy-btn:active {
  transform: scale(0.98);
}

.copy-btn.copied {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

.copy-btn svg {
  flex-shrink: 0;
}

.cdn-info {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  padding-top: 0.5rem;
}

.cdn-info-item {
  font-size: 0.85rem;
  color: var(--color-text-dim);
}

.cdn-info-item strong {
  color: var(--color-text-dim);
  font-weight: 500;
  margin-right: 0.25rem;
}

.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.example-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem;
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.example-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-dim));
  opacity: 0;
  transition: opacity 0.3s;
}

.example-card:hover {
  background: var(--color-surface-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(124, 92, 219, 0.15);
}

.example-card:hover::before {
  opacity: 1;
}

.example-number {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 1rem;
  font-family: 'Courier New', monospace;
}

.example-card h2 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.example-card p {
  color: var(--color-text-dim);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tag {
  background: rgba(124, 92, 219, 0.1);
  color: var(--color-accent);
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid rgba(124, 92, 219, 0.25);
}

footer {
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-dim);
  font-size: 0.9rem;
}

footer a {
  color: var(--color-accent);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  .tagline {
    font-size: 1rem;
  }

  .cdn-section {
    padding: 1.5rem;
  }

  .cdn-section h2 {
    font-size: 1.5rem;
  }

  .cdn-container {
    padding: 1rem;
  }

  .cdn-code-block {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
  }

  .cdn-code-block code {
    font-size: 0.8rem;
  }

  .copy-btn {
    width: 100%;
    justify-content: center;
  }

  .cdn-info {
    flex-direction: column;
    gap: 0.75rem;
  }

  .examples-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .container {
    padding: 1rem;
  }
}