/* TensorLib Documentation — Extends FrontTerrain Design System */

/* ─── Architecture Overview Diagram ─── */
.arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  padding: 2rem 0;
}

.arch-node {
  background: var(--hr-surface-card);
  border: 1px solid var(--hr-line);
  padding: 1.1rem 1.6rem;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.33, 1, 0.68, 1);
  min-width: 140px;
}

.arch-node:hover {
  border-color: var(--hr-cyan);
  transform: translateY(-2px);
  box-shadow: 0 4px 24px rgba(56, 189, 248, 0.08);
}

.arch-node-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: 0.35rem;
}

.arch-node-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--hr-ink-strong);
}

.arch-arrow {
  color: var(--hr-ink-subtle);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  padding: 0 0.6rem;
  user-select: none;
  flex-shrink: 0;
}

/* ─── Docs Section Navigation (Sticky Sidebar) ─── */
.docs-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: 5.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.docs-sidebar a {
  display: block;
  padding: 0.55rem 0.9rem;
  color: var(--hr-ink-muted);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-left: 2px solid transparent;
  transition: all 0.2s ease;
}

.docs-sidebar a:hover,
.docs-sidebar a.active {
  color: var(--hr-ink-strong);
  border-left-color: var(--hr-rust);
  background: rgba(255, 255, 255, 0.03);
}

.docs-sidebar-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--hr-rust);
  padding: 0.55rem 0.9rem;
  margin-top: 0.75rem;
}

.docs-sidebar-title:first-child {
  margin-top: 0;
}

/* ─── API Reference Cards ─── */
.api-card {
  background: var(--hr-surface-card);
  border: 1px solid var(--hr-line);
  padding: 1.75rem 2rem;
  margin-bottom: 1rem;
  transition: all 0.25s ease;
}

.api-card:hover {
  border-color: var(--hr-line-strong);
}

.api-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.api-class-name {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--hr-cyan);
}

.api-module-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--hr-line-strong);
  color: var(--hr-ink-muted);
  letter-spacing: 0.05em;
}

.api-params {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.65rem;
}

.api-param {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.2rem 0.55rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--hr-line);
  color: var(--hr-violet);
}

/* ─── Inline Code & Code Blocks ─── */
.docs-content code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: rgba(255, 255, 255, 0.06);
  padding: 0.15rem 0.45rem;
  color: var(--hr-cyan);
  border: 1px solid var(--hr-line);
}

.code-block {
  background: #07080a;
  border: 1px solid var(--hr-line-strong);
  overflow: hidden;
  margin: 1.25rem 0;
}

.code-block-header {
  background: rgba(255, 255, 255, 0.03);
  padding: 0.6rem 1.2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--hr-line);
}

.code-block-lang {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--hr-ink-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.code-block-copy {
  background: transparent;
  border: 1px solid var(--hr-line-strong);
  color: var(--hr-ink-muted);
  padding: 0.25rem 0.65rem;
  font-size: 0.7rem;
  font-weight: 600;
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: all 0.2s ease;
}

.code-block-copy:hover {
  color: var(--hr-ink-strong);
  border-color: var(--hr-ink-strong);
}

.code-block pre {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.75;
  color: #e2e8f0;
  overflow-x: auto;
  margin: 0;
  background: transparent;
  border: none;
}

.code-block pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Syntax Highlighting (Manual) */
.syn-kw { color: var(--hr-violet); }
.syn-fn { color: var(--hr-cyan); }
.syn-str { color: var(--hr-emerald); }
.syn-num { color: #fbbf24; }
.syn-cm { color: var(--hr-ink-subtle); font-style: italic; }
.syn-op { color: var(--hr-rust); }
.syn-cls { color: #38bdf8; }

/* ─── Feature Grid (for key features section) ─── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: var(--hr-surface-card);
  border: 1px solid var(--hr-line);
  padding: 1.75rem;
  transition: all 0.3s cubic-bezier(0.33, 1, 0.68, 1);
}

.feature-card:hover {
  background: var(--hr-surface-hover);
  border-color: var(--hr-line-strong);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.6rem;
  margin-bottom: 0.85rem;
  display: block;
}

.feature-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ─── Stat Counters ─── */
.stat-row {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  padding: 2rem 0;
}

.stat-item {
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--hr-ink-strong);
  line-height: 1.1;
}

.stat-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--hr-ink-subtle);
  margin-top: 0.35rem;
}

/* ─── Module Table ─── */
.module-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.module-table th {
  text-align: left;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--hr-ink-subtle);
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--hr-line-strong);
}

.module-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--hr-line);
  color: var(--hr-ink-muted);
  vertical-align: top;
}

.module-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.module-table td:first-child {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--hr-cyan);
  font-size: 0.85rem;
  white-space: nowrap;
}

/* ─── Docs Content Typography ─── */
.docs-content h2 {
  font-size: 1.6rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
  padding-top: 1rem;
}

.docs-content h3 {
  font-size: 1.15rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--hr-ink-strong);
}

.docs-content > p {
  margin-bottom: 1rem;
}

.docs-content ul {
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

.docs-content li {
  color: var(--hr-ink-muted);
  margin-bottom: 0.35rem;
  font-size: 0.95rem;
}

/* ─── Method Signature Block ─── */
.method-sig {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--hr-line);
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
  overflow-x: auto;
  color: #e2e8f0;
}

/* ─── Scroll Margin for Anchors ─── */
[id] {
  scroll-margin-top: 5.5rem;
}

/* ─── Responsive ─── */
@media (max-width: 992px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }
  .docs-sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--hr-line);
    margin-bottom: 1.5rem;
  }
  .docs-sidebar a {
    border-left: none;
    border-bottom: 2px solid transparent;
    padding: 0.4rem 0.7rem;
    font-size: 0.75rem;
  }
  .docs-sidebar a:hover,
  .docs-sidebar a.active {
    border-left-color: transparent;
    border-bottom-color: var(--hr-rust);
  }
  .docs-sidebar-title {
    width: 100%;
    padding: 0.4rem 0.7rem;
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .arch-flow {
    flex-direction: column;
    gap: 0;
  }
  .arch-arrow {
    transform: rotate(90deg);
    padding: 0.3rem 0;
  }
}

@media (max-width: 768px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .stat-row {
    gap: 2rem;
    justify-content: center;
  }
  .api-card {
    padding: 1.25rem;
  }
  .code-block pre {
    padding: 1rem;
    font-size: 0.78rem;
  }
}