:root {
  --color-primary: #6366f1;
  --color-primary-dark: #4f46e5;
  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-border: #e2e8f0;
  --color-code-bg: #f1f5f9;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Monaco', 'Menlo', monospace;
}

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

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  line-height: 1.6;
  background: var(--color-bg);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

header .header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo:hover {
  color: var(--color-primary);
}

.logo-group {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-byline {
  font-size: 11px;
  color: var(--color-text-light);
}

.logo-byline a {
  color: var(--color-text-light);
  font-weight: 500;
  transition: color 0.2s;
}

.logo-byline a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Hamburger toggle (hidden on desktop) */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

nav a {
  color: var(--color-text-light);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}

nav a:hover,
nav a.active {
  color: var(--color-primary);
  background: var(--color-bg-secondary);
  border-color: var(--color-border);
}

/* Main content */
main {
  padding: 48px 0 80px;
  min-height: calc(100vh - 180px);
}

/* Typography */
h1 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.2;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
}

p {
  margin-bottom: 16px;
}

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

a:hover {
  text-decoration: underline;
}

/* Code blocks */
pre {
  background: #1e293b;
  color: #e2e8f0;
  padding: 20px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0 24px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
}

:not(pre) > code {
  background: var(--color-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-primary-dark);
}

/* Prism.js syntax highlighting */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata {
  color: #636f88;
  font-style: italic;
}

.token.punctuation {
  color: #a0aec0;
}

.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol,
.token.deleted {
  color: #f59e0b;
}

.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin,
.token.inserted {
  color: #34d399;
}

.token.operator,
.token.entity,
.token.url,
.language-css .token.string {
  color: #67e8f9;
}

.token.atrule,
.token.attr-value,
.token.keyword {
  color: #a78bfa;
}

.token.function,
.token.class-name {
  color: #60a5fa;
}

.token.regex,
.token.important,
.token.variable {
  color: #fbbf24;
}

.token.important,
.token.bold {
  font-weight: bold;
}

.token.italic {
  font-style: italic;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
}

th, td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background: var(--color-bg-secondary);
  font-weight: 600;
}

/* Lists */
ul, ol {
  margin: 16px 0;
  padding-left: 24px;
}

li {
  margin-bottom: 8px;
}

/* Hero section */
.hero {
  text-align: center;
  padding: 60px 0;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 16px;
}

.hero p {
  font-size: 1.25rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto 32px;
}

/* Feature grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 40px 0;
}

.feature {
  background: var(--color-bg-secondary);
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.feature h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.feature p {
  color: var(--color-text-light);
  margin-bottom: 0;
  font-size: 0.9375rem;
}

/* Steps (numbered progression) */
.steps {
  margin: 40px 0;
}

.step {
  display: flex;
  gap: 20px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  min-width: 36px;
  min-height: 36px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  line-height: 1;
}

.step-content h3 {
  margin-top: 0;
  margin-bottom: 4px;
}

.step-content p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

.step-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-primary);
  background: #eef2ff;
  padding: 2px 8px;
  border-radius: 4px;
  vertical-align: middle;
}

/* Architecture diagram */
.arch-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin: 40px 0;
  flex-wrap: wrap;
}

.arch-box {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 20px 28px;
  text-align: center;
  min-width: 160px;
}

.arch-box h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.arch-box p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

.arch-box.primary {
  border-color: var(--color-primary);
  border-width: 2px;
}

.arch-arrow {
  font-size: 1.5rem;
  color: var(--color-text-light);
}

/* Footer */
footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: 24px 0;
  text-align: center;
  color: var(--color-text-light);
  font-size: 14px;
}

footer a {
  color: var(--color-text-light);
}

/* Blockquote */
blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: 16px;
  margin: 16px 0;
  color: var(--color-text-light);
}

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  header nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: 12px 24px;
    gap: 4px;
  }

  header nav.open {
    display: flex;
  }

  header nav a {
    padding: 10px 12px;
    border-radius: 6px;
    font-size: 15px;
  }

  h1 {
    font-size: 1.75rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .arch-diagram {
    flex-direction: column;
  }

  .arch-arrow {
    transform: rotate(90deg);
  }

  pre {
    padding: 12px;
    font-size: 13px;
    max-height: 60vh;
    border-radius: 6px;
  }

  :not(pre) > code {
    font-size: 0.8em;
  }
}

/* Phone breakpoint */
@media (max-width: 480px) {
  pre {
    padding: 10px;
    font-size: 12px;
    max-height: 50vh;
    margin-left: -24px;
    margin-right: -24px;
    border-radius: 0;
  }
}