/* ============================================
   BLEND BAR — Knowledge Library Page Styles
   ============================================ */

/* ---------- Knowledge Hero ---------- */
.knowledge-hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: var(--nav-height) var(--space-lg) var(--space-3xl);
}

.knowledge-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: rgba(8, 8, 8, 0.82);
  overflow: hidden;
}

.knowledge-hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 60%, rgba(61,43,31,0.25) 0%, transparent 65%);
  z-index: 1;
}

.knowledge-hero-smoke {
  position: absolute;
  inset: -20%;
  z-index: 2;
}

.knowledge-hero-smoke .smoke-layer:nth-child(1) {
  position: absolute;
  width: 550px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(201,169,110,0.06), transparent 70%);
  left: 14%;
  top: 22%;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  animation: smokeFloat 23s ease-in-out infinite;
}

.knowledge-hero-smoke .smoke-layer:nth-child(2) {
  position: absolute;
  width: 480px;
  height: 380px;
  background: radial-gradient(ellipse, rgba(201,169,110,0.05), transparent 70%);
  right: 10%;
  top: 28%;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  animation: smokeFloat 27s ease-in-out infinite;
  animation-delay: -7s;
}

.knowledge-hero-smoke .smoke-layer:nth-child(3) {
  position: absolute;
  width: 680px;
  height: 480px;
  background: radial-gradient(ellipse, rgba(245,240,232,0.03), transparent 70%);
  left: 25%;
  bottom: 14%;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  animation: smokeFloat 30s ease-in-out infinite;
  animation-delay: -13s;
}

.knowledge-hero-smoke .smoke-layer:nth-child(4) {
  position: absolute;
  width: 420px;
  height: 580px;
  background: radial-gradient(ellipse, rgba(61,43,31,0.08), transparent 70%);
  right: 18%;
  bottom: 20%;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0;
  animation: smokeFloat 25s ease-in-out infinite;
  animation-delay: -17s;
}

.knowledge-hero-vignette {
  position: absolute;
  inset: 0;
  z-index: 4;
  background: radial-gradient(ellipse at center, transparent 25%, var(--color-black) 100%);
}

.knowledge-hero-content {
  position: relative;
  z-index: 10;
  margin: 0 auto;
  text-align: center;
  max-width: 780px;
}

.knowledge-hero-content h1 {
  font-size: var(--fs-hero);
  font-weight: var(--fw-regular);
  margin-bottom: var(--space-lg);
  letter-spacing: var(--ls-tight);
}

.knowledge-hero-content .subtext {
  margin: 0 auto var(--space-md);
  font-size: var(--fs-base);
  max-width: 640px;
}

.knowledge-hero-content .subtext-detail {
  margin: 0 auto;
  font-size: var(--fs-sm);
  max-width: 660px;
  color: var(--color-gray);
  line-height: var(--lh-relaxed);
}

/* ---------- Knowledge Layout ---------- */
.knowledge-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-3xl);
  max-width: 1100px;
  margin: 0 auto;
}

/* ---------- Table of Contents (Sidebar) ---------- */
.knowledge-toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-xl));
  align-self: start;
  max-height: calc(100vh - var(--nav-height) - var(--space-3xl));
  overflow-y: auto;
  padding-right: var(--space-md);
}

.knowledge-toc::-webkit-scrollbar {
  width: 3px;
}

.knowledge-toc::-webkit-scrollbar-track {
  background: transparent;
}

.knowledge-toc::-webkit-scrollbar-thumb {
  background: rgba(201,169,110,0.15);
  border-radius: 3px;
}

.toc-title {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-lg);
}

.toc-group {
  margin-bottom: var(--space-xl);
}

.toc-group-label {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--color-cream);
  margin-bottom: var(--space-sm);
}

.toc-group a {
  display: block;
  font-size: var(--fs-sm);
  color: var(--color-gray);
  padding: var(--space-xs) 0;
  padding-left: var(--space-md);
  border-left: 1px solid rgba(201,169,110,0.1);
  transition: all var(--transition-fast);
  line-height: var(--lh-snug);
}

.toc-group a:hover {
  color: var(--color-cream);
  border-left-color: var(--color-gold);
}

/* Mobile TOC toggle */
.toc-mobile-toggle {
  display: none;
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: rgba(26,26,26,0.6);
  backdrop-filter: blur(var(--blur-md));
  -webkit-backdrop-filter: blur(var(--blur-md));
  border: 1px solid rgba(201,169,110,0.1);
  border-radius: var(--radius-md);
  color: var(--color-gold);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  text-align: left;
  cursor: pointer;
  margin-bottom: var(--space-xl);
  transition: all var(--transition-base);
}

.toc-mobile-toggle:hover {
  border-color: rgba(201,169,110,0.3);
}

.toc-mobile-toggle::after {
  content: '▾';
  float: right;
  transition: transform var(--transition-base);
}

.toc-mobile-toggle.open::after {
  transform: rotate(180deg);
}

/* ---------- Knowledge Content Area ---------- */
.knowledge-content {
  min-width: 0;
}

.knowledge-article {
  margin-bottom: var(--space-4xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid rgba(201,169,110,0.08);
}

.knowledge-article:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.knowledge-article h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin-bottom: var(--space-2xl);
  color: var(--color-cream);
}

.knowledge-article h2::before {
  content: '';
  display: block;
  width: 50px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), transparent);
  margin-bottom: var(--space-lg);
}

.knowledge-topic {
  margin-bottom: var(--space-3xl);
}

.knowledge-topic:last-child {
  margin-bottom: 0;
}

.knowledge-topic h3 {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--color-cream);
  margin-bottom: var(--space-lg);
  font-weight: var(--fw-medium);
}

.knowledge-topic p {
  font-size: var(--fs-base);
  color: var(--color-gray-light);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-lg);
  max-width: 720px;
}

.knowledge-topic p:last-child {
  margin-bottom: 0;
}

.knowledge-topic .inline-link {
  color: var(--color-gold);
  border-bottom: 1px solid rgba(201,169,110,0.3);
  transition: all var(--transition-fast);
}

.knowledge-topic .inline-link:hover {
  color: var(--color-gold-bright);
  border-bottom-color: var(--color-gold-bright);
}

/* ---------- Bottom CTA ---------- */
.knowledge-cta {
  text-align: center;
  overflow: hidden;
}

.knowledge-cta-content {
  max-width: 640px;
  margin: 0 auto;
}

.knowledge-cta h2 {
  margin-bottom: var(--space-md);
}

.knowledge-cta p {
  font-size: var(--fs-md);
  color: var(--color-gray-light);
  line-height: var(--lh-relaxed);
  margin-bottom: var(--space-2xl);
}

.knowledge-cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .knowledge-layout {
    grid-template-columns: 220px 1fr;
    gap: var(--space-2xl);
  }
}

@media (max-width: 768px) {
  .knowledge-hero {
    min-height: 90vh;
  }

  .knowledge-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .knowledge-toc {
    position: static;
    max-height: none;
    padding-right: 0;
    display: none;
  }

  .knowledge-toc.open {
    display: block;
    margin-bottom: var(--space-2xl);
  }

  .toc-mobile-toggle {
    display: block;
  }

  .knowledge-article h2::before {
    width: 40px;
  }
}