/* ==========================================================================
   HOME.CSS — Homepage-only sections (hero, showcase, TrisGraph, carousel)
   Shared chrome (nav, footer, search, chips) lives in css/system/
   ========================================================================== */

/* --------------------------------------------------------------------------
   HERO SECTION
   Two-column grid: content left, visual placeholder right
   -------------------------------------------------------------------------- */
.hero-section {
  padding: var(--space-xl) var(--space-md) var(--space-lg);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--space-xl);
  max-width: var(--max-width);
  margin: 0 auto;
}

/* --- Left column: typography + search + chips --- */

.hero-content {
  text-align: left;
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

.hero-description {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 32rem;
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.hero-content .search-bar {
  margin-bottom: var(--space-md);
}

.category-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

/* --- Right column: animation placeholder box --- */

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-visual-box {
  width: 100%;
  min-height: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background-color: rgba(13, 13, 13, 0.04);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-lg);
  text-align: center;
}

.hero-visual-label {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.hero-visual-hint {
  font-size: 0.875rem;
  color: var(--text-secondary);
  max-width: 16rem;
}


/* ==========================================================================
   2. SHOWCASE SECTION (dark background)
   Full-width band for featured / animated content later
   ========================================================================== */

.showcase-section {
  width: 100%;
  background-color: var(--bg-dark);
  padding: var(--space-xl) var(--space-md);
}

.showcase-content {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  color: var(--bg-light);
}

.showcase-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-sm);
  color: var(--bg-light);
}

.showcase-subtitle {
  font-size: 1rem;
  color: #a8a8a8;
  max-width: 36rem;
  margin: 0 auto var(--space-lg);
  line-height: 1.6;
}

/* Grid of placeholder “icons” — staggered sizes for visual interest */
.floating-icons-area {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  border: 1px solid rgba(217, 217, 217, 0.2);
  border-radius: var(--radius-lg);
  background-color: rgba(247, 247, 245, 0.03);
}

.icon-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  padding: var(--space-sm);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--bg-light);
  background-color: rgba(247, 247, 245, 0.08);
  border: 1px solid rgba(217, 217, 217, 0.25);
  border-radius: var(--radius-md);
  transition: background-color var(--transition), border-color var(--transition);
}

.icon-placeholder:hover {
  background-color: rgba(247, 247, 245, 0.12);
  border-color: rgba(217, 217, 217, 0.45);
}

/* Slight size variation on alternating items (static “float” feel, no animation) */
.floating-icons-area .icon-placeholder:nth-child(odd) {
  min-height: 80px;
}

.floating-icons-area .icon-placeholder:nth-child(3n) {
  min-height: 64px;
}


/* --------------------------------------------------------------------------
    LOGO CAROUSEL — True seamless infinite marquee loop
    Premium infinite scrolling with no visible resets
    -------------------------------------------------------------------------- */

.logo-carousel-container {
  justify-content: center;
  align-items: center;
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  perspective: 1000px;
  width: 100%;
  overflow: hidden;
}

.logo-carousel {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  justify-content: flex-start;
  position: relative;
  height: 120px;
  /* Will-change for smooth animation */
  will-change: transform;
  animation: marquee-scroll 80s linear infinite;
}

.logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  background-color: rgba(247, 247, 245, 0.06);
  border: 1px solid rgba(217, 217, 217, 0.2);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  cursor: default;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.logo-item:hover {
  background-color: rgba(247, 247, 245, 0.12);
  border-color: rgba(217, 217, 217, 0.4);
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
}

.logo-item img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

/* ==========================================================================
   TRISGRAPH SECTION — Interactive Visual Knowledge System
   ========================================================================== */
.trisgraph-section {
  background-color: #ffffff; /* Contrast white for premium redesign */
  border-top: 1px solid var(--border-color);
  padding: 8rem 1.5rem;
}

.trisgraph-inner {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 4rem;
  max-width: var(--max-width);
  margin: 0 auto;
  align-items: center;
}

.trisgraph-content {
  text-align: left;
}

.trisgraph-title {
  font-size: clamp(2rem, 4.5vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.trisgraph-subtitle {
  font-size: 1.125rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--text-primary);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.trisgraph-description {
  font-size: 0.975rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 32rem;
}

.trisgraph-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.trisgraph-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  text-align: left;
  cursor: pointer;
  width: 100%;
  max-width: 480px;
  font-family: inherit;
  transition: border-color var(--transition), background-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.trisgraph-card:hover {
  border-color: var(--text-primary);
  background-color: rgba(17, 17, 17, 0.01);
  transform: translateY(-1px);
}

.trisgraph-card.active {
  border-color: var(--text-primary);
  background-color: rgba(17, 17, 17, 0.02);
  box-shadow: 0 4px 12px rgba(17, 17, 17, 0.02);
}

.trisgraph-card .card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background: rgba(17, 17, 17, 0.03);
  color: var(--text-primary);
  flex-shrink: 0;
  transition: background-color var(--transition);
}

.trisgraph-card .card-icon svg.custom-card-icon {
  width: 20px;
  height: 20px;
}

.trisgraph-card.active .card-icon {
  background: var(--text-primary);
  color: #ffffff;
}

.trisgraph-card.active .card-icon img {
  filter: brightness(0) invert(1);
}

.trisgraph-card.active .card-icon svg {
  color: #ffffff;
}

.card-text h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

.card-text p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.trisgraph-visual-container {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  width: 100%;
}

.trisgraph-visual-card {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 16px;
  padding: 2.5rem;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.02);
  width: 100%;
  position: relative;
  overflow: visible;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.trisgraph-visual-card:hover {
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.03);
}

.trisgraph-svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

/* Base lines and node styling */
.trisgraph-line {
  stroke: #eaeaea;
  stroke-width: 1.5;
  stroke-linecap: round;
  transition: stroke 0.4s ease, stroke-width 0.4s ease, opacity 0.4s ease;
}

.trisgraph-node-circle {
  fill: #ffffff;
  stroke: #d9d9d9;
  stroke-width: 2px;
  r: 5;
  cursor: pointer;
  transition: fill 0.4s cubic-bezier(0.16, 1, 0.3, 1), stroke 0.4s cubic-bezier(0.16, 1, 0.3, 1), stroke-width 0.4s cubic-bezier(0.16, 1, 0.3, 1), r 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease;
}

/* Center node exception */
.node-infotris .trisgraph-node-circle {
  r: 9;
}

.trisgraph-node-text {
  font-family: 'Inter', sans-serif;
  font-size: 10px;
  font-weight: 500;
  fill: #888888;
  letter-spacing: -0.01em;
  pointer-events: none;
  transition: fill 0.4s ease, font-weight 0.4s ease, opacity 0.4s ease;
}

.node-infotris .trisgraph-node-text {
  font-size: 11px;
}

/* Active path highlighting */
[data-active-path] .trisgraph-line {
  stroke: #eaeaea;
  stroke-width: 1.5;
  opacity: 0.35;
}

[data-active-path] .trisgraph-node-group .trisgraph-node-circle {
  fill: #ffffff;
  stroke: #eaeaea;
  opacity: 0.5;
}

[data-active-path] .trisgraph-node-group .trisgraph-node-text {
  fill: #c0c0c0;
  font-weight: 500;
  opacity: 0.5;
}

/* Active path rules */
[data-active-path="python"] .path-python {
  stroke: #111111;
  stroke-width: 2.2px;
  opacity: 1;
}
[data-active-path="python"] .node-python .trisgraph-node-circle {
  fill: #ffffff;
  stroke: #111111;
  stroke-width: 2.5px;
  opacity: 1;
}
[data-active-path="python"] .node-python .trisgraph-node-text {
  fill: #111111;
  font-weight: 600;
  opacity: 1;
}

[data-active-path="ai"] .path-ai {
  stroke: #111111;
  stroke-width: 2.2px;
  opacity: 1;
}
[data-active-path="ai"] .node-ai .trisgraph-node-circle {
  fill: #ffffff;
  stroke: #111111;
  stroke-width: 2.5px;
  opacity: 1;
}
[data-active-path="ai"] .node-ai .trisgraph-node-text {
  fill: #111111;
  font-weight: 600;
  opacity: 1;
}

[data-active-path="webdev"] .path-webdev {
  stroke: #111111;
  stroke-width: 2.2px;
  opacity: 1;
}
[data-active-path="webdev"] .node-webdev .trisgraph-node-circle {
  fill: #ffffff;
  stroke: #111111;
  stroke-width: 2.5px;
  opacity: 1;
}
[data-active-path="webdev"] .node-webdev .trisgraph-node-text {
  fill: #111111;
  font-weight: 600;
  opacity: 1;
}

[data-active-path="datascience"] .path-datascience {
  stroke: #111111;
  stroke-width: 2.2px;
  opacity: 1;
}
[data-active-path="datascience"] .node-datascience .trisgraph-node-circle {
  fill: #ffffff;
  stroke: #111111;
  stroke-width: 2.5px;
  opacity: 1;
}
[data-active-path="datascience"] .node-datascience .trisgraph-node-text {
  fill: #111111;
  font-weight: 600;
  opacity: 1;
}

/* Force center node to always be active and bold */
[data-active-path] .node-infotris .trisgraph-node-circle {
  fill: #111111;
  stroke: #111111;
  opacity: 1;
}
[data-active-path] .node-infotris .trisgraph-node-text {
  fill: #111111;
  font-weight: 700;
  opacity: 1;
}

/* Hover-specific interaction styling overrides */
.trisgraph-node-group.active-hover-node .trisgraph-node-circle {
  fill: #111111 !important;
  stroke: #111111 !important;
  r: 8 !important;
  opacity: 1 !important;
}

.trisgraph-node-group.active-hover-node .trisgraph-node-text {
  fill: #111111 !important;
  font-weight: 700 !important;
  opacity: 1 !important;
}

.trisgraph-node-group.active-hover-neighbor .trisgraph-node-circle {
  stroke: #111111 !important;
  opacity: 1 !important;
}

.trisgraph-node-group.active-hover-neighbor .trisgraph-node-text {
  fill: #111111 !important;
  opacity: 1 !important;
}

.trisgraph-line.active-hover-line {
  stroke: #111111 !important;
  stroke-width: 2.5px !important;
  opacity: 1 !important;
}

.trisgraph-node-group.inactive-hover-node .trisgraph-node-circle {
  opacity: 0.15 !important;
}

.trisgraph-node-group.inactive-hover-node .trisgraph-node-text {
  opacity: 0.15 !important;
}

/* Tooltip info panel */
.trisgraph-tooltip {
  position: absolute;
  bottom: 2rem;
  left: 2rem;
  right: 2rem;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.04);
  pointer-events: none;
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  transition: opacity var(--transition), transform var(--transition);
}

.tooltip-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.tooltip-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   RESPONSIVE DESIGN — Media queries for tablets and phones
   Breakpoints: 992px (tablet), 768px (mobile nav), 480px (small phone)
   ========================================================================== */

@media (max-width: 992px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .trisgraph-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .trisgraph-card {
    max-width: 100%;
  }

  .hero-visual-box {
    min-height: 240px;
  }

  .floating-icons-area {
    grid-template-columns: repeat(2, 1fr);
  }

  .logo-carousel {
    max-width: 100%;
    height: 100px;
    animation: marquee-scroll 65s linear infinite;
  }

  .logo-item {
    width: 80px;
    height: 80px;
  }

  .logo-item img {
    width: 48px;
    height: 48px;
  }
}

@media (max-width: 768px) {
  .hero-section {
    padding-top: var(--space-lg);
  }

  .trisgraph-section {
    padding: 5rem 1.5rem;
  }

  .trisgraph-visual-card {
    padding: 1.5rem;
  }

  .trisgraph-tooltip {
    bottom: 1rem;
    left: 1rem;
    right: 1rem;
    padding: 1rem;
  }

  .logo-carousel {
    max-width: 100%;
    height: 80px;
    animation: marquee-scroll 40s linear infinite;
  }

  .logo-item {
    width: 70px;
    height: 70px;
  }

  .logo-item img {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 1.75rem;
  }

  .floating-icons-area {
    grid-template-columns: 1fr;
    padding: var(--space-md);
  }

  .logo-carousel {
    max-width: 100%;
    height: 70px;
    gap: 8px;
    animation: marquee-scroll 35s linear infinite;
  }

  .logo-item {
    width: 60px;
    height: 60px;
  }

  .logo-item img {
    width: 36px;
    height: 36px;
  }

  .category-chips {
    justify-content: flex-start;
  }
}