.docs-topbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: 56px; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px;
  background: rgba(9, 9, 11, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.docs-brand {
  display: flex; align-items: center; gap: 10px;
  color: var(--text); font-weight: 600; font-size: 0.92rem;
  text-decoration: none;
}

.docs-brand:hover { color: var(--text); }
.docs-brand svg { color: var(--accent); }
.docs-brand img { image-rendering: pixelated; }

.docs-topnav {
  display: flex; gap: 24px;
}

.docs-topnav a {
  font-size: 0.85rem; font-weight: 500;
  color: var(--text-3);
  transition: color var(--dur) var(--ease);
}

.docs-topnav a:hover { color: var(--text); }
.docs-topnav a.active { color: var(--accent); }

.docs-menu-toggle {
  display: none;
  background: none; border: none;
  color: var(--text-2); cursor: pointer;
  padding: 4px;
}

.docs-layout {
  display: flex;
  padding-top: 56px;
  min-height: 100vh;
}

.docs-sidebar {
  position: fixed; top: 56px; left: 0; bottom: 0;
  width: 240px;
  background: var(--bg-sub);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 24px 0; 
  z-index: 10;
}

.docs-nav {
  display: flex; flex-direction: column; gap: 24px;
  padding: 0 16px;
}

.docs-nav-group {
  display: flex; flex-direction: column; gap: 2px;
}

.docs-nav-heading {
  font-size: 0.7rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-3);
  padding: 0 12px 8px;
}

.docs-nav-link {
  display: block;
  padding: 7px 12px;
  font-size: 0.85rem; font-weight: 450;
  color: var(--text-2);
  border-radius: 6px;
  transition: all var(--dur) var(--ease);
  text-decoration: none;
}

.docs-nav-link:hover {
  color: var(--text);
  background: var(--surface);
}

.docs-nav-link.active {
  color: var(--accent);
  background: var(--accent-glow);
}

.docs-content {
  margin-left: 240px;
  flex: 1;
  max-width: 780px;
  padding: 48px 56px 80px;
}

.docs-section {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.docs-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
}

.docs-section h1 {
  font-size: 1.6rem; font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.docs-lead {
  color: var(--text-2); font-size: 0.95rem;
  margin-bottom: 28px; line-height: 1.6;
}

.docs-steps {
  display: flex; flex-direction: column;
  gap: 0;
}

.docs-step {
  display: flex; gap: 16px;
  padding: 16px 0;
  position: relative;
}

.docs-step:not(:last-child)::before {
  content: '';
  position: absolute;
  left: 15px; top: 44px; bottom: 0;
  width: 1px;
  background: var(--border);
}

.docs-step-num {
  width: 32px; height: 32px; flex-shrink: 0;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--accent); font-weight: 700; font-size: 0.82rem;
  display: grid; place-items: center;
}

.docs-step h4 {
  font-size: 0.95rem; font-weight: 600;
  margin-bottom: 4px; color: var(--text);
}

.docs-step p {
  color: var(--text-2); font-size: 0.88rem;
  line-height: 1.6; margin: 0;
}

.docs-callout {
  display: flex; gap: 12px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-top: 24px;
}

.docs-callout svg {
  flex-shrink: 0; margin-top: 2px;
  color: var(--accent);
}

.docs-callout strong {
  display: block; font-size: 0.88rem;
  margin-bottom: 4px;
}

.docs-callout p {
  font-size: 0.85rem; color: var(--text-2);
  margin: 0 0 8px;
  line-height: 1.5;
}

.docs-callout p:last-child { margin-bottom: 0; }

.docs-callout .code-block {
  margin-top: 8px;
  margin-bottom: 0;
}

.docs-parts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.docs-part {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  transition: border-color var(--dur) var(--ease);
}

.docs-part:hover { border-color: var(--border-h); }

.docs-part h4 {
  font-size: 0.92rem; font-weight: 600;
  margin-bottom: 6px; color: var(--text);
}

.docs-part p {
  font-size: 0.84rem; color: var(--text-2);
  line-height: 1.55; margin-bottom: 8px;
}

.docs-part-link {
  font-size: 0.8rem; font-weight: 500;
}

.docs-footer {
  padding-top: 40px;
  text-align: left;
  color: var(--text-3);
  font-size: 0.84rem;
}

.docs-footer p { margin-bottom: 6px; }

.docs-sidebar::-webkit-scrollbar { width: 4px; }
.docs-sidebar::-webkit-scrollbar-track { background: transparent; }
.docs-sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

@media (max-width: 900px) {
  .docs-topnav { display: none; }
  .docs-menu-toggle { display: block; }

  .docs-sidebar {
    transform: translateX(-100%);
    transition: transform 0.25s var(--ease);
    box-shadow: none;
  }

  .docs-sidebar.open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.4);
  }

  .docs-content {
    margin-left: 0;
    padding: 36px 24px 60px;
  }

  .docs-parts-grid {
    grid-template-columns: 1fr;
  }
}