/* ═══════════════════════════════════════════════
   SECTION: TECHNICAL DOCUMENTATION (COMPACT HUB)
   ═══════════════════════════════════════════════ */

.sec-docs {
  width: 100%;
  padding: 80px 0;
  box-sizing: border-box;
  color: var(--fg-main, #e2e8f0);
}

.docs-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.docs-header {
  margin-bottom: 36px;
}

.sys-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.25);
  border-radius: 4px;
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: #60a5fa;
  margin-bottom: 16px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #3b82f6;
  box-shadow: 0 0 8px #3b82f6;
}

.docs-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 12px 0;
}

.text-accent {
  color: #3b82f6;
}

.docs-subtitle {
  font-size: 1rem;
  color: #94a3b8;
  max-width: 620px;
  margin: 0;
  line-height: 1.6;
}

/* Documentation Hub Layout */
.docs-hub-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.docs-card {
  display: flex;
  text-decoration: none;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 24px;
  transition: all 0.2s ease-in-out;
  color: inherit;
}

.docs-card:hover {
  background: rgba(15, 23, 42, 0.7);
  border-color: rgba(59, 130, 246, 0.4);
  transform: translateY(-2px);
}

/* Primary Card Design */
.primary-card {
  align-items: center;
  gap: 20px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.6) 0%, rgba(30, 41, 59, 0.4) 100%);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.primary-card:hover {
  border-color: #3b82f6;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.15);
}

.card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 8px;
  color: #60a5fa;
  flex-shrink: 0;
}

.card-content {
  flex: 1;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.card-meta h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0;
  color: #f8fafc;
}

.ext-tag {
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  color: #60a5fa;
  background: rgba(59, 130, 246, 0.12);
  padding: 2px 8px;
  border-radius: 4px;
}

.card-content p {
  margin: 0;
  font-size: 0.9rem;
  color: #94a3b8;
  line-height: 1.5;
}

/* Sub Cards Grid */
.docs-sub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.docs-sub-grid .docs-card {
  flex-direction: column;
  padding: 20px;
}

.card-header-mini {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.card-tag {
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  color: #64748b;
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 6px;
  border-radius: 3px;
}

.ext-arrow {
  color: #64748b;
  font-size: 0.9rem;
  transition: transform 0.2s ease, color 0.2s ease;
}

.docs-card:hover .ext-arrow {
  color: #60a5fa;
  transform: translate(2px, -2px);
}

.docs-sub-grid h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 6px 0;
  color: #f1f5f9;
}

.docs-sub-grid p {
  font-size: 0.85rem;
  color: #94a3b8;
  margin: 0;
  line-height: 1.4;
}

/* Responsive Breakpoint */
@media (max-width: 640px) {
  .primary-card {
    flex-direction: column;
    align-items: flex-start;
  }

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