:root {
  --bg-color: #0d1117;
  --text-main: #c9d1d9;
  --text-headers: #ffffff;
  --accent-color: #58a6ff;
  --accent-glow: rgba(88, 166, 255, 0.2);
  --card-bg: #161b22;
  --border-color: #30363d;
  --code-bg: #000000;
  --code-text: #7ee787;
  --success: #238636;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', Courier, monospace;
}

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding: 2rem;
}

/* Header */
header {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 800px;
  width: 100%;
}

h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--text-headers);
  margin-bottom: 0.5rem;
  background: linear-gradient(90deg, #58a6ff, #a371f7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 30px var(--accent-glow);
}

.subtitle {
  font-size: 1.1rem;
  color: #8b949e;
}

/* Main Container */
main {
  width: 100%;
  max-width: 800px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

section {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

section:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  border-color: #58a6ff;
}

h2 {
  font-size: 1.5rem;
  color: var(--text-headers);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

/* Requirements List */
.req-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.req-item {
  background: rgba(48, 54, 61, 0.5);
  padding: 1rem;
  border-radius: 8px;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
}

.req-item svg {
  color: var(--accent-color);
  flex-shrink: 0;
  margin-top: 3px;
}

/* Command Blocks */
.command-group {
  margin-bottom: 1.5rem;
}
.command-group:last-child {
  margin-bottom: 0;
}

.command-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-headers);
}

.code-block {
  background-color: var(--code-bg);
  border-radius: 8px;
  padding: 1rem;
  position: relative;
  border: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
}

.code-block code {
  color: var(--code-text);
  font-size: 0.9rem;
  overflow-x: auto;
  white-space: nowrap;
  padding-right: 1rem;
  scrollbar-width: thin;
}

.copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.copy-btn:hover {
  background: var(--border-color);
  color: var(--text-headers);
}

.copy-btn.copied {
  border-color: var(--success);
  color: var(--success);
}

/* Footer */
footer {
  margin-top: 3rem;
  color: #8b949e;
  font-size: 0.9rem;
  text-align: center;
}

/* Responsive */
@media (max-width: 600px) {
  h1 { font-size: 2rem; }
  main { padding: 0; }
  section { padding: 1.5rem; }
  .code-block {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }
  .copy-btn {
    width: 100%;
    justify-content: center;
  }
}