@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&display=swap');

:root {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-terminal: #000000;
  --bg-card: #1c2128;
  --border-color: #30363d;
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --accent-green: #00ff41;
  --accent-cyan: #00d4ff;
  --accent-dim: #00cc3380;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-mono);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  padding: 0.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  color: var(--accent-green);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--accent-green);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6rem 2rem 4rem;
}

.hero-ascii {
  color: var(--accent-green);
  font-size: clamp(0.5rem, 1.5vw, 0.9rem);
  line-height: 1.2;
  white-space: pre;
  margin-bottom: 1.5rem;
  text-shadow: 0 0 10px var(--accent-dim);
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "calt" 0;
}

.hero-kaomoji {
  font-size: 2rem;
  margin-bottom: 1rem;
  min-height: 2.5rem;
}

.hero-tagline {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 600px;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--accent-green);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: #33ff66;
  box-shadow: 0 0 20px var(--accent-dim);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

/* Sections */
.section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  color: var(--accent-green);
}

.section-subtitle {
  color: var(--text-secondary);
  margin-bottom: 3rem;
  font-size: 0.9rem;
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  transition: border-color 0.2s;
}

.feature-card:hover {
  border-color: var(--accent-green);
}

.feature-card h3 {
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.feature-card .feature-example {
  margin-top: 1rem;
  padding: 0.75rem;
  background: var(--bg-terminal);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--text-primary);
  white-space: pre;
  overflow-x: auto;
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "calt" 0;
}

/* Examples Section */
.examples-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.example-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
}

.example-cmd, .example-output {
  padding: 1.25rem;
  font-size: 0.8rem;
}

.example-cmd {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
}

.example-cmd .prompt {
  color: var(--accent-green);
}

.example-output {
  background: var(--bg-terminal);
  white-space: pre;
  overflow-x: auto;
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "calt" 0;
}

/* Install Section */
.install-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.install-tab {
  padding: 0.75rem 1.25rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.install-tab.active {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}

.install-tab:hover {
  color: var(--text-primary);
}

.install-content {
  display: none;
  background: var(--bg-terminal);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 1.25rem;
  position: relative;
}

.install-content.active {
  display: block;
}

.install-content code {
  color: var(--text-primary);
  font-size: 0.85rem;
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

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

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

/* Playground */
.playground-section {
  padding: 5rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.playground-tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0;
  overflow-x: auto;
}

.playground-tab {
  padding: 0.75rem 1.25rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: all 0.2s;
}

.playground-tab.active {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}

.playground-tab:hover {
  color: var(--text-primary);
}

.playground-container {
  display: grid;
  grid-template-columns: 300px 1fr;
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 8px 8px;
  overflow: hidden;
  min-height: 400px;
}

.playground-input {
  background: var(--bg-secondary);
  padding: 1.5rem;
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.playground-input label {
  color: var(--text-secondary);
  font-size: 0.8rem;
  display: block;
  margin-bottom: 0.25rem;
}

.playground-input input,
.playground-input select,
.playground-input textarea {
  width: 100%;
  background: var(--bg-terminal);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.5rem;
  border-radius: 4px;
}

.playground-input textarea {
  resize: vertical;
  min-height: 80px;
}

.playground-input input[type="checkbox"] {
  width: auto;
  margin-right: 0.5rem;
  accent-color: var(--accent-green);
}

.playground-input input[type="number"] {
  width: 100px;
}

.playground-input input:focus,
.playground-input select:focus,
.playground-input textarea:focus {
  outline: none;
  border-color: var(--accent-green);
}

.playground-output-wrap {
  background: var(--bg-terminal);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.playground-output {
  flex: 1;
  white-space: pre;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.4;
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0, "calt" 0;
  -webkit-font-feature-settings: "liga" 0, "calt" 0;
  min-height: 300px;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px 4px 0 0;
}

.playground-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.playground-actions button {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  padding: 0.5rem 1rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.playground-actions button:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.playground-cli {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--bg-secondary);
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--accent-cyan);
  display: none;
}

.playground-cli.visible {
  display: block;
}

/* Loading skeleton */
.playground-skeleton {
  padding: 2rem;
}

.skeleton-line {
  height: 12px;
  margin-bottom: 10px;
  background: linear-gradient(90deg, var(--border-color) 25%, var(--bg-secondary) 50%, var(--border-color) 75%);
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s ease-in-out infinite;
  border-radius: 3px;
}

.skeleton-text {
  color: var(--text-secondary);
  font-size: 0.75rem;
  margin-top: 1.5rem;
  text-align: center;
  opacity: 0.7;
}

@keyframes skeletonShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Toolbar */
.playground-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.4rem 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-top: none;
  border-radius: 0 0 4px 4px;
  margin-top: -1px;
}

.playground-dims {
  font-size: 0.7rem;
  color: var(--text-secondary);
  background: var(--bg-terminal);
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  border: 1px solid var(--border-color);
  font-variant-numeric: tabular-nums;
}

.playground-toolbar-controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.toolbar-control {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.7rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.toolbar-control input[type="checkbox"] {
  width: auto;
  margin: 0;
  accent-color: var(--accent-green);
  cursor: pointer;
}

.toolbar-control input[type="range"] {
  width: 60px;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--border-color);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.toolbar-control input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-green);
  cursor: pointer;
}

.toolbar-control input[type="range"]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-green);
  border: none;
  cursor: pointer;
}

.playground-output.wrap {
  white-space: pre-wrap;
  word-break: break-all;
}

.playground-panel {
  display: none;
}

.playground-panel.active {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ANSI blink animation */
@keyframes ansiBlink {
  50% { opacity: 0; }
}

.ansi-blink {
  animation: ansiBlink 1s step-end infinite;
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 2rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.8rem;
}

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

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

/* Responsive */
@media (max-width: 768px) {
  .nav {
    padding: 0.75rem 1rem;
  }

  .nav-links {
    display: none;
  }

  .hero {
    padding: 5rem 1rem 3rem;
  }

  .hero-ascii {
    font-size: clamp(0.35rem, 2.5vw, 0.7rem);
  }

  .section {
    padding: 3rem 1rem;
  }

  .example-item {
    grid-template-columns: 1fr;
  }

  .example-cmd {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .playground-container {
    grid-template-columns: 1fr;
  }

  .playground-input {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .playground-toolbar {
    flex-wrap: wrap;
    gap: 0.4rem;
  }

  .playground-toolbar-controls {
    gap: 0.5rem;
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Selection */
::selection {
  background: var(--accent-green);
  color: var(--bg-primary);
}