:root {
  /* Colors - Developer Dark Theme */
  --bg-primary: #0f1117;
  --bg-secondary: #161b22;
  --bg-tertiary: #21262d;
  
  --text-primary: #c9d1d9;
  --text-secondary: #8b949e;
  --text-muted: #484f58;
  
  --accent-primary: #58a6ff;
  --accent-hover: #3182ce;
  --accent-glow: rgba(88, 166, 255, 0.15);
  
  --border-color: #30363d;
  
  /* Syntax Highlighting */
  --syn-keyword: #ff7b72;
  --syn-string: #a5d6ff;
  --syn-comment: #8b949e;
  --syn-func: #d2a8ff;
  
  --warn-color: #d29922;
  --error-color: #f85149;
  --success-color: #2ea043;

  /* Layout */
  --container-width: 1100px;
  --nav-height: 70px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  
  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'Fira Code', ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace;
}

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

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

h1, h2, h3, h4, h5, h6 {
  color: #ffffff;
  font-weight: 600;
  line-height: 1.2;
}

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

a:hover {
  color: var(--accent-hover);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.navbar {
  position: sticky;
  top: 0;
  height: var(--nav-height);
  background-color: rgba(15, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  display: flex;
  align-items: center;
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.25rem;
  color: #fff;
}

.logo-text {
  letter-spacing: -0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links a:not(.btn-outline) {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:not(.btn-outline):hover {
  color: var(--text-primary);
}

/* --- Buttons --- */
.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  background: var(--bg-tertiary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s;
  cursor: pointer;
}

.btn-outline:hover {
  border-color: var(--text-muted);
  background: #2d333b;
  color: #fff;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background-color: var(--success-color);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.2s;
}

.btn-primary:hover {
  background-color: #238636;
  color: #fff;
  box-shadow: 0 0 15px rgba(46, 160, 67, 0.3);
}

/* --- Hero Section --- */
.hero {
  padding: 120px 0 100px;
  text-align: center;
  background: radial-gradient(circle at 50% 0%, var(--bg-tertiary) 0%, var(--bg-primary) 70%);
  border-bottom: 1px solid var(--border-color);
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  padding: 4px 12px;
  background-color: var(--accent-glow);
  color: var(--accent-primary);
  border: 1px solid rgba(88, 166, 255, 0.3);
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.hero-title {
  font-size: 3.5rem;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
  background: linear-gradient(180deg, #fff 0%, #c9d1d9 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 48px;
  max-width: 650px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.code-snippet-box {
  display: flex;
  align-items: center;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.install-cmd {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #fff;
  padding: 10px 16px;
}

.copy-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all 0.2s;
}

.copy-btn:hover {
  background: var(--bg-tertiary);
  color: #fff;
}

/* --- Features Section --- */
.section-bg {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.features-section {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  font-size: 2.25rem;
  margin-bottom: 64px;
  letter-spacing: -0.5px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 32px;
}

.feature-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
  border-color: var(--text-muted);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- How it Works Section --- */
.how-it-works-section {
  padding: 100px 0;
}

.steps-container {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.step-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}

.step-content.reverse {
  grid-template-columns: 1.2fr 1fr;
}

.step-content.reverse .step-text {
  order: 2;
}

.step-content.reverse .code-window {
  order: 1;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-glow);
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 16px;
  border: 1px solid rgba(88, 166, 255, 0.2);
}

.step-text h3 {
  font-size: 1.75rem;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.step-text p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* --- Code Windows --- */
.code-window {
  background: #0d1117;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.window-header {
  background: var(--bg-secondary);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27c93f; }

.window-title {
  margin-left: auto;
  margin-right: auto;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  padding-right: 48px; /* Offset for dots */
}

.code-window pre {
  margin: 0;
  padding: 24px;
  overflow-x: auto;
}

.code-window code {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: #e6edf3;
  line-height: 1.5;
}

/* Syntax Highlighting overrides */
.text-warn { color: var(--warn-color); }
.text-error { color: var(--error-color); }
.prompt { color: var(--success-color); }

/* --- Footer --- */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 64px 0 32px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 48px;
}

.footer-left p {
  color: var(--text-secondary);
  margin-top: 12px;
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  gap: 32px;
}

.footer-links a {
  color: var(--text-secondary);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding-top: 32px;
  border-top: 1px solid var(--border-color);
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .step-content, .step-content.reverse {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .step-content.reverse .step-text {
    order: 1;
  }
  
  .step-content.reverse .code-window {
    order: 2;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
}

@media (max-width: 600px) {
  .nav-links a:not(.btn-outline) {
    display: none;
  }
  
  .hero {
    padding: 80px 0 60px;
  }
  
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .code-snippet-box {
    width: 100%;
    justify-content: space-between;
  }
  
  .btn-primary {
    width: 100%;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 32px;
  }
}