:root {
  --fg: #111;
  --bg: #fff;
  --muted: #888;
  --border: #e0e0e0;
  --accent: #000;
  --green: #2a7d4f;
  --yellow: #9a7b20;
  --error: #c00;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* --- Layout --- */

.docs-layout {
  display: flex;
  min-height: 100vh;
}

/* --- Nav Sidebar --- */

.docs-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 220px;
  height: 100vh;
  overflow-y: auto;
  padding: 1.5rem 1rem;
  border-right: 1px solid var(--border);
  background: var(--bg);
  z-index: 10;
}

.nav-title {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg);
  text-decoration: none;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.nav-title:hover {
  color: var(--muted);
}

.nav-section {
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

.nav-link {
  display: block;
  font-size: 0.8rem;
  color: var(--fg);
  text-decoration: none;
  padding: 0.3rem 0 0.3rem 0.75rem;
  border-left: 2px solid transparent;
  transition: border-color 0.15s, color 0.15s;
}

.nav-link:hover {
  color: var(--accent);
  border-left-color: var(--border);
}

.nav-link.active {
  font-weight: 600;
  color: var(--accent);
  border-left-color: var(--accent);
}

/* --- Content Area --- */

.docs-content {
  margin-left: 220px;
  flex: 1;
  padding: 2.5rem 2rem;
}

.docs-content-inner {
  max-width: 720px;
  margin: 0 auto;
}

/* --- Typography --- */

h1 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.page-subtitle {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

h2 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

p {
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

ul, ol {
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 1rem;
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.3rem;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

/* --- Code --- */

code {
  font-family: var(--mono);
  font-size: 0.8rem;
  background: #f5f5f5;
  padding: 0.15rem 0.35rem;
  border-radius: 3px;
  border: 1px solid var(--border);
}

pre {
  position: relative;
  background: #f5f5f5;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  margin-bottom: 1.25rem;
}

.copy-wrap {
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.25rem 0.4rem;
  cursor: pointer;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1;
  transition: color 0.15s, border-color 0.15s;
}

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

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

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.78rem;
  line-height: 1.6;
}

/* --- Tables --- */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  margin-bottom: 1.25rem;
}

th {
  text-align: left;
  font-weight: 600;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 0.5rem 0.75rem;
  border-bottom: 2px solid var(--border);
}

td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

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

/* --- Callouts --- */

.callout {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  font-size: 0.825rem;
}

.callout.info {
  border-left-color: var(--accent);
  background: #fafafa;
}

.callout.warning {
  border-left-color: var(--yellow);
  background: #fffdf5;
}

.callout.success {
  border-left-color: var(--green);
  background: #f5fdf8;
}

.callout p {
  margin-bottom: 0;
}

/* --- Steps --- */

.step {
  margin-bottom: 1.5rem;
}

.step-number {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  line-height: 1.5rem;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 0.7rem;
  font-weight: 600;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.step-title {
  font-size: 0.9rem;
  font-weight: 600;
  display: inline;
}

/* --- Problem/Solution (Troubleshooting) --- */

.problem {
  margin-bottom: 1.75rem;
}

.problem-title {
  font-family: var(--mono);
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--error);
}

.problem-solution {
  font-size: 0.85rem;
  line-height: 1.7;
}

/* --- Footer --- */

.docs-footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
}

/* --- Mobile hamburger --- */

.nav-toggle {
  display: none;
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 20;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg);
  cursor: pointer;
  font-size: 1rem;
  line-height: 2rem;
  text-align: center;
  color: var(--fg);
}

/* --- Responsive --- */

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .docs-nav {
    transform: translateX(-100%);
    transition: transform 0.2s ease;
    box-shadow: none;
  }

  .docs-nav.open {
    transform: translateX(0);
    box-shadow: 2px 0 8px rgba(0,0,0,0.08);
  }

  .docs-content {
    margin-left: 0;
    padding: 3.5rem 1.25rem 2rem;
  }
}