:root {
  --bg: #0b1120;
  --bg-elevated: #111a2e;
  --surface: #151e32;
  --surface-hover: #1e2942;
  --border: #263456;
  --border-subtle: #1b2744;
  --text: #e8edf8;
  --text-muted: #8b9ab8;
  --accent: #00d4ff;
  --accent-soft: rgba(0, 212, 255, 0.12);
  --accent-dim: #0891b2;
  --secondary: #a78bfa;
  --success: #34d399;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --radius: 14px;
  --radius-sm: 8px;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Fira Code", Consolas, "Liberation Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: -1;
  mask-image: radial-gradient(ellipse at top, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at top, black 0%, transparent 70%);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--secondary);
  text-decoration: underline;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.header {
  position: relative;
  padding: 4rem 0 2.5rem;
  overflow: hidden;
}

.header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.header-content {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.prompt-line {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.prompt-line .prompt {
  color: var(--accent);
}

.prompt-line .cursor {
  display: inline-block;
  width: 8px;
  height: 1.1em;
  background: var(--accent);
  border-radius: 1px;
  animation: blink 1.2s step-end infinite;
  vertical-align: text-bottom;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.header h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.subtitle {
  margin: 0 0 2rem;
  color: var(--text-muted);
  font-size: 1.125rem;
  line-height: 1.6;
}

.search-bar {
  max-width: 520px;
  margin: 0 auto;
  position: relative;
}

.search-bar::before {
  content: "⌘";
  position: absolute;
  left: 1.125rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  pointer-events: none;
}

.search-bar input {
  width: 100%;
  padding: 1rem 1.25rem 1rem 2.75rem;
  font-size: 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

.search-bar input:focus {
  border-color: var(--accent);
  background: var(--bg-elevated);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 2rem 0 2.5rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}

.filter-btn:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: var(--border);
}

.filter-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}

.cheatsheet {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
  padding-bottom: 4rem;
}

.category {
  background: var(--surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.category:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border);
}

.category h2 {
  margin: 0 0 1.25rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.command-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.command {
  position: relative;
  padding: 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s, background 0.2s;
}

.command:hover {
  border-color: var(--accent-dim);
  background: rgba(17, 26, 46, 0.8);
}

.command code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text);
  word-break: break-word;
  padding-right: 3.5rem;
}

.command p {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  padding: 0.35rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
}

.command:hover .copy-btn,
.copy-btn:focus {
  opacity: 1;
}

.copy-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.copy-btn.copied {
  background: rgba(52, 211, 153, 0.15);
  border-color: var(--success);
  color: var(--success);
  opacity: 1;
}

.empty-state {
  text-align: center;
  padding: 5rem 1rem;
  color: var(--text-muted);
  font-size: 1.125rem;
}

.footer {
  padding: 2.5rem 0;
  text-align: center;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.copy-toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 0.625rem 1.25rem;
  background: var(--success);
  color: #062c1f;
  border: none;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s;
}

.copy-toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

@media (max-width: 640px) {
  .container {
    padding: 0 1rem;
  }

  .header {
    padding: 2.5rem 0 1.5rem;
  }

  .prompt-line {
    font-size: 0.75rem;
    padding: 0.4rem 0.85rem;
  }

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

  .category {
    padding: 1.25rem;
  }

  .copy-btn {
    opacity: 1;
  }

  .command code {
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f8fafc;
    --bg-elevated: #ffffff;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    --border: #e2e8f0;
    --border-subtle: #f1f5f9;
    --text: #0f172a;
    --text-muted: #64748b;
    --accent: #0284c7;
    --accent-soft: rgba(2, 132, 199, 0.1);
    --accent-dim: #0369a1;
    --secondary: #7c3aed;
    --success: #059669;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  }

  body::before {
    background-image:
      linear-gradient(rgba(2, 132, 199, 0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(2, 132, 199, 0.04) 1px, transparent 1px);
  }

  .command {
    background: #f8fafc;
  }

  .command:hover {
    background: #f1f5f9;
  }

  .header h1 {
    background: linear-gradient(135deg, #0f172a 0%, #0284c7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .copy-toast {
    color: #fff;
  }
}