:root {
  --orange: #FF5200;
  --orange-light: rgba(255, 82, 0, 0.08);
  --black: #1a1a1a;
  --grey: #666;
  --light-grey: #e8e8e8;
  --bg: #fafafa;
  --white: #fff;
  --code-bg: #f5f5f5;
  --max-width: 720px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  color: var(--black);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
header {
  padding: 3rem 0 1rem;
  border-bottom: 1px solid var(--light-grey);
  margin-bottom: 3rem;
}

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

.site-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--black);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-title span {
  color: var(--orange);
}

.site-title:hover {
  text-decoration: none;
}

header nav {
  display: flex;
  gap: 1.5rem;
}

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

header nav a:hover {
  color: var(--orange);
}

/* Hero */
.hero {
  padding: 2rem 0 3rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

.hero h1 span {
  color: var(--orange);
}

.hero .subtitle {
  font-size: 1.15rem;
  color: var(--grey);
  max-width: 540px;
  margin: 0 auto 2rem;
  line-height: 1.6;
}

.hero .tagline {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--orange);
  background: var(--orange-light);
  padding: 0.4rem 1rem;
  border-radius: 100px;
  letter-spacing: 0.01em;
}

/* Sections */
section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--light-grey);
}

section h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}

section h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

section p {
  margin-bottom: 1rem;
  color: var(--black);
}

section p + p {
  margin-top: 0;
}

/* Spec table */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.spec-table th,
.spec-table td {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--light-grey);
}

.spec-table th {
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--grey);
}

.spec-table td:first-child {
  font-weight: 500;
  white-space: nowrap;
}

.spec-table code {
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.85em;
}

.spec-table tr:last-child td {
  border-bottom: none;
}

/* Code blocks */
pre {
  background: var(--code-bg);
  border: 1px solid var(--light-grey);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.65;
  margin: 1.5rem 0;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  white-space: pre-wrap;
  word-wrap: break-word;
}

code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.88em;
}

p code {
  background: var(--code-bg);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
}

/* Example block */
.example-block {
  position: relative;
  margin: 1.5rem 0;
}

.example-block .label {
  position: absolute;
  top: -0.6rem;
  left: 1rem;
  background: var(--bg);
  padding: 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--orange);
}

.example-block pre {
  border-color: var(--orange);
  border-width: 1px;
}

/* Lists */
section ul, section ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

section li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

section li strong {
  font-weight: 600;
}

/* Terms grid */
.terms-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.term-card {
  background: var(--white);
  border: 1px solid var(--light-grey);
  border-radius: 8px;
  padding: 1.25rem;
}

.term-card .term-name {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--orange);
}

.term-card .term-desc {
  font-size: 0.88rem;
  color: var(--grey);
  line-height: 1.5;
}

/* CTA section */
.cta {
  text-align: center;
  padding: 3rem 0;
}

.cta h2 {
  margin-bottom: 0.75rem;
}

.cta p {
  color: var(--grey);
  margin-bottom: 1.5rem;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background: var(--orange);
  color: white;
}

.btn-primary:hover {
  background: #e64a00;
}

.btn-outline {
  background: transparent;
  color: var(--black);
  border: 1px solid var(--light-grey);
}

.btn-outline:hover {
  border-color: var(--orange);
  color: var(--orange);
}

/* Footer */
footer {
  padding: 2rem 0;
  border-top: 1px solid var(--light-grey);
  margin-top: 2rem;
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--grey);
}

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

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

/* Blockquote */
blockquote {
  border-left: 3px solid var(--orange);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  color: var(--grey);
  font-style: italic;
}

/* Inline link style */
a {
  color: var(--orange);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.cta-link {
  text-decoration: none;
}

.cta-link:hover {
  text-decoration: none;
  color: #e64a00;
}

/* Why section quote */
.pull-quote {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--black);
  border-left: 3px solid var(--orange);
  padding: 0.5rem 1.25rem;
  margin: 1.5rem 0;
  font-style: normal;
  line-height: 1.6;
}

/* Responsive */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero .subtitle {
    font-size: 1rem;
  }

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

  header .container {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  footer .container {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  pre {
    font-size: 0.78rem;
    padding: 1rem;
  }

  .container {
    padding: 0 1.25rem;
  }
}