/* ============================================
   ClickShift AI Showcase — Styles
   ============================================ */

/* --- Reset (Josh Comeau) --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
body { min-height: 100svh; line-height: 1.5; -webkit-font-smoothing: antialiased; }
img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
p, h1, h2, h3, h4, h5, h6 { overflow-wrap: break-word; }

/* --- Custom Properties --- */
:root {
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Space Grotesk', var(--font-body);
  
  --bg: #050510;
  --bg-subtle: #0a0a1f;
  --bg-card: #0f0f2a;
  --bg-card-hover: #151540;
  
  --text: #e8e8f0;
  --text-muted: #b8b8d4;
  --text-dim: #9292b2;
  
  --accent: #6c5ce7;
  --accent-light: #a29bfe;
  --accent-2: #00cec9;
  --accent-3: #fd79a8;
  
  --gradient-1: linear-gradient(135deg, #6c5ce7, #a29bfe, #00cec9);
  --gradient-2: linear-gradient(135deg, #6c5ce7, #fd79a8);
  
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  --space-5xl: 128px;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

/* --- Base --- */
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

::selection {
  background: var(--accent);
  color: white;
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  top: -60px;
  left: var(--space-md);
  background: var(--accent);
  color: white;
  padding: var(--space-sm) var(--space-lg);
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  z-index: 1000;
  transition: top 0.2s;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(108, 92, 231, 0.5);
  outline: 2px solid white;
  outline-offset: 2px;
}
.skip-link:focus {
  top: 0;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-md) var(--space-lg);
  padding-top: max(var(--space-md), env(safe-area-inset-top));
  padding-left: max(var(--space-lg), env(safe-area-inset-left));
  padding-right: max(var(--space-lg), env(safe-area-inset-right));
  transition: background 0.4s, padding 0.4s, backdrop-filter 0.4s;
}
.nav.scrolled {
  background: rgba(5, 5, 16, 0.85);
  backdrop-filter: blur(20px);
  padding: var(--space-sm) var(--space-lg);
  border-bottom: 1px solid rgba(108, 92, 231, 0.1);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
}
.logo-icon {
  color: var(--accent);
  font-size: 1.5rem;
}
.logo-accent {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
  padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  position: relative;
  padding: var(--space-sm) var(--space-xs);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-1);
  transform: scaleX(0);
  transition: transform 0.3s var(--ease-out);
}
.nav-links a:hover, .nav-links a:focus-visible {
  color: var(--text);
}
.nav-links a:hover::after, .nav-links a:focus-visible::after {
  transform: scaleX(1);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  z-index: 101;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s, opacity 0.3s;
}

/* --- Hero --- */
.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: 100%;
  max-height: 100%;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
}
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--bg);
}
#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
  mix-blend-mode: screen;
  z-index: 1;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(5,5,16,0.15) 0%, rgba(5,5,16,0.45) 60%, rgba(5,5,16,0.7) 100%);
  pointer-events: none;
  z-index: 2;
}
.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 800px;
  padding: var(--space-3xl) var(--space-lg);
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: rgba(108, 92, 231, 0.15);
  border: 1px solid rgba(108, 92, 231, 0.3);
  padding: var(--space-xs) var(--space-md);
  border-radius: 100px;
  font-size: 0.85rem;
  color: var(--accent-light);
  margin-bottom: var(--space-xl);
}
.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-2);
  animation: pulse 2s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.5rem, 6vw + 0.5rem, 5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}
.gradient-text {
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto var(--space-xl);
  line-height: 1.7;
  text-shadow: 0 1px 8px rgba(0,0,0,0.8), 0 0 20px rgba(10,10,26,0.9);
}
.hero-cta {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-3xl);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.3s var(--ease-out);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: linear-gradient(135deg, #6c5ce7, #6e66be, #007a76);
  color: white;
  box-shadow: 0 4px 24px rgba(108, 92, 231, 0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(108, 92, 231, 0.6);
}
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid rgba(136, 136, 170, 0.2);
}
.btn-ghost:hover {
  color: var(--text);
  border-color: rgba(136, 136, 170, 0.4);
  background: rgba(255, 255, 255, 0.03);
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
}
.stat {
  text-align: center;
}
.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--text);
}
.stat-suffix {
  font-family: var(--font-heading);
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 700;
  color: var(--accent-light);
}
.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: var(--space-xs);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-dim);
  font-size: 0.75rem;
  animation: fade-bounce 3s ease infinite;
}
.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-dim);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}
.scroll-dot {
  width: 4px;
  height: 8px;
  background: var(--accent-light);
  border-radius: 2px;
  animation: scroll-dot 2s ease infinite;
}
@keyframes scroll-dot {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(10px); opacity: 0; }
}
@keyframes fade-bounce {
  0%, 100% { opacity: 0.6; transform: translateX(-50%) translateY(0); }
  50% { opacity: 1; transform: translateX(-50%) translateY(-4px); }
}

/* --- Sections --- */
.section {
  padding: var(--space-5xl) var(--space-lg);
  max-width: 1200px;
  margin: 0 auto;
}
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.section-tag {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--accent-light);
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}
.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw + 0.5rem, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-md);
}
.section-description {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --- Gallery --- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.gallery-item-large {
  grid-row: span 2;
}
.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s var(--ease-out);
}
.gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(108, 92, 231, 0.15);
}
.gallery-img-wrap {
  position: relative;
  aspect-ratio: 1;
  overflow: hidden;
}
.gallery-item-large .gallery-img-wrap {
  aspect-ratio: auto;
  height: 100%;
}
.gallery-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}
.gallery-item:hover .gallery-img-wrap img {
  transform: scale(1.05);
}

/* Gallery placeholder (shown when image fails to load) */
.gallery-placeholder {
  position: absolute;
  inset: 0;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hover));
  gap: var(--space-md);
}
.gallery-img-wrap.placeholder .gallery-placeholder {
  display: flex;
}
.gallery-img-wrap.placeholder img {
  display: none;
}
.placeholder-icon {
  font-size: 3rem;
  opacity: 0.6;
}
.placeholder-text {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-weight: 500;
}

.gallery-info {
  padding: var(--space-md) var(--space-lg);
}
.gallery-category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-light);
}
.gallery-info h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin: var(--space-xs) 0;
}
.gallery-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- 3D Visualization --- */
.viz-demos {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.viz-demo {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
  transition: transform 0.5s var(--ease-out);
}
.viz-demo:hover {
  transform: translateY(-4px);
}
.viz-canvas-wrap {
  aspect-ratio: 4/3;
  background: var(--bg-subtle);
  position: relative;
}
.viz-canvas-wrap canvas {
  width: 100%;
  height: 100%;
}
.viz-info {
  padding: var(--space-md) var(--space-lg);
}
.viz-info h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}
.viz-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Style Transfer --- */
.transfer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--space-xl);
}
.transfer-pair {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
}
.transfer-slider {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  cursor: ew-resize;
  user-select: none;
}
.transfer-before, .transfer-after {
  position: absolute;
  inset: 0;
}
.transfer-before img, .transfer-after img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.transfer-before {
  z-index: 2;
  clip-path: inset(0 50% 0 0);
}
.transfer-label {
  position: absolute;
  bottom: var(--space-md);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  z-index: 5;
}
.transfer-before .transfer-label { left: var(--space-md); }
.transfer-after .transfer-label { right: var(--space-md); }
.transfer-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 48px;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: ew-resize;
}
.transfer-handle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
}
.transfer-handle-line {
  width: 2px;
  flex: 1;
  background: white;
  box-shadow: 0 0 8px rgba(0,0,0,0.5);
}
.transfer-handle-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(0,0,0,0.4);
  flex-shrink: 0;
  color: #333;
}

/* Transfer placeholder */
.transfer-placeholder {
  position: absolute;
  inset: 0;
  display: none;
  z-index: 3;
}
.transfer-slider.placeholder .transfer-placeholder {
  display: flex;
}
.transfer-slider.placeholder .transfer-before img,
.transfer-slider.placeholder .transfer-after img,
.transfer-slider.placeholder .transfer-handle {
  display: none;
}
.placeholder-split {
  display: flex;
  width: 100%;
  height: 100%;
}
.placeholder-half {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 500;
}
.placeholder-half.before {
  background: linear-gradient(135deg, #1a1a3a, #252550);
  color: var(--text-muted);
}
.placeholder-half.after {
  background: linear-gradient(135deg, #252550, #1a1a3a);
  color: var(--accent-light);
}
.transfer-info {
  padding: var(--space-md) var(--space-lg);
}
.transfer-info h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}
.transfer-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- Motion --- */
.motion-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}
.motion-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--bg-card);
}
.motion-item-wide {
  grid-column: span 2;
}
.motion-item canvas {
  width: 100%;
  aspect-ratio: 16/9;
}
.motion-item-wide canvas {
  aspect-ratio: 21/9;
}
.motion-info {
  padding: var(--space-md) var(--space-lg);
}
.motion-info h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}
.motion-info p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* --- About --- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
  margin-bottom: var(--space-3xl);
}
.about-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform 0.4s var(--ease-out), background 0.4s;
  border: 1px solid rgba(108, 92, 231, 0.05);
}
.about-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: rgba(108, 92, 231, 0.15);
}
.about-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}
.about-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
}
.about-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.about-cta {
  text-align: center;
}
.about-cta p {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

/* --- Footer --- */
.footer {
  border-top: 1px solid rgba(108, 92, 231, 0.1);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-weight: 700;
}
.footer-brand .logo-accent {
  font-size: 1.2rem;
}
.footer-text {
  font-size: 0.85rem;
  color: var(--text-dim);
}

/* --- Animations --- */
.animate-in {
  opacity: 0;
  transform: translateY(30px);
  animation: slide-up 0.8s var(--ease-out) forwards;
}
.animate-in:nth-child(1) { animation-delay: 0.1s; }
.animate-in:nth-child(2) { animation-delay: 0.25s; }
.animate-in:nth-child(3) { animation-delay: 0.4s; }
.animate-in:nth-child(4) { animation-delay: 0.55s; }
.animate-in:nth-child(5) { animation-delay: 0.7s; }

@keyframes slide-up {
  to { opacity: 1; transform: translateY(0); }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Mobile Responsive --- */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-item-large { grid-row: span 1; }
  .viz-demos { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(5, 5, 16, 0.98);
    backdrop-filter: blur(20px);
    gap: var(--space-xl);
    transform: translateX(100%);
    transition: transform 0.4s var(--ease-out);
    z-index: 100;
  }
  .nav-links.open {
    transform: translateX(0);
  }
  .nav-links a {
    font-size: 1.25rem;
  }
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  /* Hide forced line breaks — let text wrap naturally on mobile */
  .hero-title br,
  .section-title br {
    display: none;
  }

  .section {
    padding: var(--space-3xl) var(--space-md);
  }

  /* Tighten hero spacing for mobile — ensure content fits in viewport */
  .hero-content {
    padding: var(--space-xl) var(--space-md);
  }
  .hero-badge {
    margin-bottom: var(--space-sm);
  }
  .hero-title {
    margin-bottom: var(--space-md);
  }
  .hero-subtitle {
    margin-bottom: var(--space-md);
  }
  .hero-cta {
    margin-bottom: var(--space-xl);
  }

  .hero-stats {
    gap: var(--space-xl);
  }
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  /* Restore visual hierarchy for the featured gallery item on mobile */
  .gallery-item-large .gallery-img-wrap {
    aspect-ratio: 3/4;
    height: auto;
  }

  .transfer-grid {
    grid-template-columns: 1fr;
  }

  /* Prevent touch gesture conflicts on comparison sliders */
  .transfer-slider {
    touch-action: pan-y;
  }

  .motion-grid {
    grid-template-columns: 1fr;
  }
  .motion-item-wide {
    grid-column: span 1;
  }

  /* Fix ultrawide canvas being too short on mobile single-column */
  .motion-item-wide canvas {
    aspect-ratio: 16/9;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    gap: var(--space-md);
  }
}

@media (max-width: 480px) {
  .hero-stats {
    flex-direction: column;
    gap: var(--space-md);
  }
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
}

/* Smooth scrolling for non-motion-sensitive users */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .animate-in,
  .animate-on-scroll {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }
  .scroll-dot, .badge-dot, .scroll-indicator {
    animation: none;
  }
}