/* ── Shape Hub Hero ──────────────────────────────────────────────────── */
.shape-hub-page .hero {
  background: var(--bg-hero);
  padding: var(--space-3xl) var(--space-md) var(--space-2xl);
  text-align: center;
  position: relative;
  overflow: hidden;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
}

.shape-hub-page .hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to top, var(--bg-primary), transparent);
  pointer-events: none;
}

.shape-hub-page .hero-content-wrap {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.shape-hub-page .hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--space-sm);
  letter-spacing: -0.03em;
}

.shape-hub-page .hero p {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255, 255, 255, 0.86);
  max-width: 640px;
  margin: 0 auto;
}

/* ── Shape Hub Page ─────────────────────────────────────────────────── */
.shape-hub-page .cs .cs-inner > p,
.shape-hub-page .cs .cs-inner > ol,
.shape-hub-page .cs .cs-inner > ul {
  font-size: .93rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: .85rem;
}

.shape-hub-page .cs .cs-inner a {
  color: var(--primary-500, #3b82f6);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.shape-hub-page .cs .cs-inner h3:not(.faq-q h3) {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 1.5rem 0 .75rem;
  color: var(--text-primary);
}

.shape-hub-page .cs .cs-inner table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: .86rem;
}

.shape-hub-page .cs .cs-inner th,
.shape-hub-page .cs .cs-inner td {
  padding: .55rem .75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color, #e2e8f0);
}

.shape-hub-page .cs .cs-inner th {
  font-weight: 700;
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--text-tertiary);
  background: var(--bg-tertiary, #f8fafc);
  position: sticky;
  top: 0;
}

.shape-hub-page .cs .cs-inner td {
  color: var(--text-secondary);
}

.shape-hub-page .cs .cs-inner td:nth-child(2) {
  font-family: monospace;
  font-size: .84rem;
  color: var(--primary-500, #3b82f6);
  font-weight: 600;
}

[data-theme='dark'] .shape-hub-page .cs .cs-inner td:nth-child(2) {
  color: var(--primary-300, #93c5fd);
}

/* ── Section SVG Diagrams ───────────────────────────────────────────── */
.shape-hub-svg {
  width: 100%;
  max-width: 680px;
  height: auto;
  margin: 1rem auto 1.5rem;
  display: block;
}

/* ── Shape Card Grid ────────────────────────────────────────────────── */
.shape-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.15rem;
  margin: 1.5rem 0;
}

.shape-card {
  background: var(--bg-card, #fff);
  border: 1px solid var(--border-color, #e2e8f0);
  border-radius: 14px;
  padding: 1.15rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  gap: .35rem;
  transition: all .2s ease;
  box-shadow: var(--shadow-card, 0 1px 3px rgba(0,0,0,.06));
  position: relative;
  overflow: hidden;
}

.shape-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500, #3b82f6), var(--teal-400, #2dd4bf));
  opacity: 0;
  transition: opacity .2s ease;
}

.shape-card:hover {
  border-color: var(--primary-500, #3b82f6);
  box-shadow: 0 4px 16px rgba(59, 130, 246, .12);
  transform: translateY(-2px);
  text-decoration: none;
}

.shape-card:hover::before {
  opacity: 1;
}

.shape-card-icon {
  width: 64px;
  height: 64px;
  margin-bottom: .25rem;
}

.shape-card-icon svg {
  width: 100%;
  height: 100%;
}

.shape-card h3 {
  font-size: .98rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}

.shape-card-desc {
  font-size: .82rem;
  line-height: 1.55;
  color: var(--text-secondary);
  margin: 0;
  flex: 1;
}

.shape-card-formula {
  font-family: monospace;
  font-size: .82rem;
  font-weight: 600;
  color: var(--primary-500, #3b82f6);
  background: var(--bg-tertiary, #f8fafc);
  padding: .3rem .65rem;
  border-radius: 6px;
  margin-top: .35rem;
  display: inline-block;
  align-self: flex-start;
}

[data-theme='dark'] .shape-card-formula {
  color: var(--primary-300, #93c5fd);
  background: hsl(210, 30%, 14%);
}

.shape-card-link {
  font-size: .82rem;
  font-weight: 600;
  color: var(--primary-500, #3b82f6);
  margin-top: .35rem;
  display: inline-block;
  transition: color .15s;
}

.shape-card:hover .shape-card-link {
  color: var(--primary-600, #2563eb);
}

/* ── Responsive ─────────────────────────────────────────────────────── */
@media (max-width: 880px) {
  .shape-cards {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  }
}

@media (max-width: 580px) {
  .shape-cards {
    grid-template-columns: 1fr;
  }

  .shape-hub-svg {
    max-width: 100%;
  }
}

/* ── Table responsive scroll ────────────────────────────────────────── */
@media (max-width: 680px) {
  .shape-hub-page .cs .cs-inner table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
}