/* ============================================
   Purpleship Common Styles - 2026 Edition
   Shared across all 5 pages
   Premium Black Design Trend
   ============================================ */

/* --- Reset & Root Variables --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { overflow-x: clip; }

:root {
  /* Brand - Enhanced Vivid Purple */
  --brand-purple: #7C3AED;
  --brand-purple-light: #A78BFA;
  --brand-purple-dark: #5B21B6;

  /* Backgrounds - Deeper Black Palette with Blue Tint */
  --bg-primary: #060610;
  --bg-secondary: #0a0a14;
  --bg-tertiary: #0f0f18;
  --bg-quaternary: #14141c;

  /* Text - Warm Off-White */
  --text-primary: #F0F0F0;
  --text-secondary: #9898A0;
  --text-muted: #6B6B70;

  /* Product accents - Enhanced */
  --movit-accent: #10B981;
  --stampit-accent: #F59E0B;
  --worldcanvas-accent: #3B82F6;
  --pricing-accent: #F59E0B;

  /* Page accent (overridden per page) */
  --page-accent: var(--brand-purple-light);

  /* Glass surfaces - Purple Tinted */
  --surface-glass: rgba(139, 92, 246, 0.03);
  --surface-glass-hover: rgba(139, 92, 246, 0.06);
  --surface-glass-border: rgba(139, 92, 246, 0.08);
  --surface-glass-border-hover: rgba(167, 139, 250, 0.14);

  /* Glow effects - More subtle */
  --glow-purple: 0 0 20px rgba(167, 139, 250, 0.2), 0 0 40px rgba(167, 139, 250, 0.08);
  --glow-purple-strong: 0 0 28px rgba(167, 139, 250, 0.3), 0 0 56px rgba(167, 139, 250, 0.15);

  /* Legacy compat */
  --accent-gold: #F59E0B;
  --accent-blue: var(--page-accent);

  /* Transitions - Enhanced Curves (Linear-style faster) */
  --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-micro: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows - Deeper */
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 80px rgba(0, 0, 0, 0.6);

  /* Radii - Linear-style (less rounded) */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Spacing - More Generous */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 28px;
  --space-xl: 40px;
  --space-2xl: 56px;
  --space-3xl: 96px;

  /* Scroll-Driven Animation Tokens */
  --anim-ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --anim-duration-enter: 0.9s;
  --anim-stagger: 0.12s;
}

/* --- Base Typography --- */
html {
  scroll-behavior: smooth;
  font-size: 18px;
  line-height: 1.7;
}

body {
  font-family: 'Inter', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-weight: 400;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  overflow-y: auto;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  word-break: keep-all;
  overflow-wrap: break-word;
}

/* Dot Grid Pattern Overlay (Linear-style) */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.03;
  background-image: radial-gradient(circle, rgba(255,255,255,0.5) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* Aurora Ambient Effect */
body::after {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.06;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(167, 139, 250, 0.25) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(59, 130, 246, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.15) 0%, transparent 60%);
  animation: aurora 20s ease-in-out infinite;
}

@keyframes aurora {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  25% { transform: translate(5%, 5%) rotate(2deg); }
  50% { transform: translate(-5%, 3%) rotate(-2deg); }
  75% { transform: translate(3%, -5%) rotate(1deg); }
}

/* === Scroll-Driven Animation Keyframes === */
@keyframes sda-fade-up {
  from { opacity: 0; transform: translateY(60px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes sda-fade-left {
  from { opacity: 0; transform: translateX(-80px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes sda-fade-right {
  from { opacity: 0; transform: translateX(80px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes sda-scale-reveal {
  from { opacity: 0; transform: scale(0.85); filter: blur(8px); }
  to { opacity: 1; transform: scale(1); filter: blur(0px); }
}

@keyframes sda-text-reveal {
  from { opacity: 0; transform: translateY(100%); filter: blur(4px); }
  to { opacity: 1; transform: translateY(0); filter: blur(0px); }
}

@keyframes sda-card-enter {
  from { opacity: 0; transform: translateY(40px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes sda-parallax-up {
  from { transform: translateY(40px); }
  to { transform: translateY(-40px); }
}

/* Text Selection */
::selection {
  background: rgba(167, 139, 250, 0.3);
  color: var(--text-primary);
}

::-moz-selection {
  background: rgba(167, 139, 250, 0.3);
  color: var(--text-primary);
}

/* --- WebGL Canvas --- */
#bgCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  opacity: 0.7;
  transition: opacity 0.8s ease;
}

/* --- Navigation --- */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-bottom: 1px solid var(--surface-glass-border);
  transition: var(--transition-smooth);
  height: 64px;
}

.main-nav.scrolled {
  background: rgba(5, 5, 5, 0.75);
  border-bottom-color: var(--surface-glass-border-hover);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.125rem;
  text-decoration: none;
  transition: var(--transition-smooth);
}

.nav-brand:hover { opacity: 0.8; }

.brand-icon {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 0 12px rgba(167, 139, 250, 0.4));
  animation: iconBreathing 4s ease-in-out infinite;
}

.brand-icon-emoji {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(167, 139, 250, 0.08);
  border: 1px solid var(--surface-glass-border);
  font-size: 18px;
}

.brand-text {
  color: var(--text-primary);
  font-weight: 700;
  letter-spacing: -0.04em;
}

@keyframes iconBreathing {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 0 8px rgba(167, 139, 250, 0.3));
  }
  50% {
    transform: scale(1.05);
    filter: drop-shadow(0 0 16px rgba(167, 139, 250, 0.5));
  }
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-menu a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: var(--transition-smooth);
  position: relative;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--page-accent);
  transition: var(--transition-smooth);
  transform: translateX(-50%);
  border-radius: 1px;
}

.nav-menu a:hover {
  color: var(--text-primary);
}

.nav-menu a:hover::after {
  width: 60%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* Hamburger */
.nav-burger {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 20px;
  color: var(--text-primary);
  background: transparent;
  border: none;
  cursor: pointer;
  margin-left: 8px;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 64px;
  right: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border-bottom: 1px solid var(--surface-glass-border);
  display: grid;
  gap: 4px;
  padding: 12px 16px;
  z-index: 999;
}
.mobile-menu a {
  color: var(--text-primary);
  text-decoration: none;
  padding: 12px 12px;
  border-radius: var(--radius-sm);
  font-weight: 500;
  transition: var(--transition-smooth);
}
.mobile-menu a:hover {
  background: rgba(167, 139, 250, 0.08);
  color: var(--brand-purple-light);
}
.mobile-menu[hidden] { display: none !important; }

/* --- Language Selector --- */
.language-selector { position: relative; }

.lang-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  height: 32px;
  font-size: 12px;
  color: var(--text-secondary);
  background: rgba(167, 139, 250, 0.05);
  border: 1px solid var(--surface-glass-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-smooth);
}

.lang-button:hover {
  color: var(--text-primary);
  border-color: var(--surface-glass-border-hover);
  background: rgba(167, 139, 250, 0.12);
  box-shadow: 0 0 16px rgba(167, 139, 250, 0.15);
}

.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  background: rgba(5, 5, 5, 0.95);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  border: 1px solid var(--surface-glass-border-hover);
  border-radius: var(--radius-md);
  padding: 6px;
  display: grid;
  gap: 2px;
  min-width: 150px;
  z-index: 1001;
  box-shadow: var(--shadow-md), var(--glow-purple);
}

.lang-menu[hidden] { display: none !important; }

.lang-menu button {
  text-align: left;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  cursor: pointer;
  transition: var(--transition-smooth);
  white-space: nowrap;
}

.lang-menu button:hover {
  background: rgba(167, 139, 250, 0.08);
  color: var(--text-primary);
}

/* --- Section Layout --- */
.section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 2;
  padding: var(--space-3xl) var(--space-lg);
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.section.active {
  opacity: 1;
  transform: translateY(0);
}

.section-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

/* Enhanced Heading Styles */
h1, h2, h3, h4, h5, h6 {
  letter-spacing: -0.06em;
  line-height: 1.2;
  font-weight: 700;
}

p {
  line-height: 1.8;
}

/* --- Glass Card --- */
.glass-card, .feature-card, .card {
  background: var(--surface-glass);
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
  will-change: transform;
}

/* Gradient Border Effect */
.glass-card::before, .feature-card::before, .card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, var(--surface-glass-border), transparent 50%, var(--surface-glass-border));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.glass-card:hover, .feature-card:hover, .card:hover {
  background: var(--surface-glass-hover);
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-md), var(--glow-purple);
}

.glass-card:hover::before, .feature-card:hover::before, .card:hover::before {
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.4), rgba(167, 139, 250, 0.1) 50%, rgba(167, 139, 250, 0.4));
}

/* --- Feature Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-xl) 0;
  width: 100%;
}

.feature-card {
  text-align: left;
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

/* Sequential entrance for cards */
.feature-card:nth-child(1) { transition-delay: 0.1s; }
.feature-card:nth-child(2) { transition-delay: 0.2s; }
.feature-card:nth-child(3) { transition-delay: 0.3s; }
.feature-card:nth-child(4) { transition-delay: 0.4s; }
.feature-card:nth-child(5) { transition-delay: 0.5s; }
.feature-card:nth-child(6) { transition-delay: 0.6s; }

.feature-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: rgba(167, 139, 250, 0.1);
  border: 1px solid rgba(167, 139, 250, 0.2);
  transition: var(--transition-smooth);
}

.feature-card:hover .feature-icon {
  transform: scale(1.05);
  box-shadow: 0 0 24px rgba(167, 139, 250, 0.3);
  background: rgba(167, 139, 250, 0.15);
}

.feature-title, .feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  letter-spacing: -0.06em;
  white-space: nowrap;
}

.feature-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0;
}

/* --- Download Buttons --- */
.download-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-2xl);
  flex-wrap: wrap;
}

.download-btn, .cta {
  padding: 18px 40px;
  border-radius: var(--radius-xl);
  background: var(--page-accent);
  color: white;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition-spring);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3), 0 0 0 rgba(167, 139, 250, 0);
  position: relative;
  overflow: hidden;
  min-width: 200px;
  text-align: center;
  border: none;
  cursor: pointer;
  font-family: inherit;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.download-btn::before, .cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.6s ease;
}

.download-btn:hover:not(.coming-soon):not(:disabled),
.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4), var(--glow-purple-strong);
  filter: brightness(1.15);
}

.download-btn:hover:not(.coming-soon):not(:disabled)::before,
.cta:hover::before {
  left: 100%;
}

.download-btn:active:not(.coming-soon):not(:disabled),
.cta:active {
  transform: translateY(-1px) scale(1.01);
}

.download-btn.coming-soon,
.download-btn:disabled {
  background: var(--bg-tertiary);
  color: var(--text-muted);
  cursor: not-allowed;
  box-shadow: none;
}

/* --- Footer --- */
footer {
  width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: var(--space-3xl) var(--space-lg);
  position: relative;
  z-index: 2;
  margin-top: var(--space-3xl);
}

footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(60%, 500px);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(167, 139, 250, 0.5), transparent);
  box-shadow: 0 0 20px rgba(167, 139, 250, 0.3);
}

footer p {
  font-size: 0.85rem;
  line-height: 1.8;
  margin-bottom: 0.5rem;
  text-align: center;
  color: var(--text-muted);
  text-shadow: none;
  max-width: none;
}

footer a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
}

footer a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--page-accent);
  transition: width 0.3s ease;
}

footer a:hover {
  color: var(--brand-purple-light);
}

footer a:hover::after {
  width: 100%;
  box-shadow: 0 0 8px var(--page-accent);
}

/* --- Scrollbar (thinner) --- */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(167, 139, 250, 0.4), rgba(139, 92, 246, 0.4));
  border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(167, 139, 250, 0.6), rgba(139, 92, 246, 0.6));
  box-shadow: 0 0 8px rgba(167, 139, 250, 0.4);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --space-3xl: 64px;
  }

  .nav-container {
    padding: 0 1rem;
  }

  .nav-menu { display: none; }
  .nav-burger { display: inline-flex; }

  a.nav-brand::before {
    content: '‹';
    font-size: 1.3em;
    font-weight: 300;
    opacity: 0.4;
    margin-right: 2px;
    transition: opacity 0.2s ease;
  }

  a.nav-brand:active::before {
    opacity: 0.8;
  }

  .section {
    padding: 100px 1.25rem 2rem;
    min-height: auto;
  }

  .features-grid {
    grid-template-columns: 1fr;
    padding: var(--space-md) 0;
    gap: var(--space-md);
  }

  .feature-card {
    padding: var(--space-xl);
  }

  .download-buttons {
    flex-direction: column;
    align-items: center;
  }

  footer {
    padding: var(--space-2xl) var(--space-md);
  }

  body::after {
    opacity: 0.04;
  }
}

@media (max-width: 480px) {
  .nav-actions { gap: var(--space-sm); }
  .lang-button { padding: 4px 8px; height: 28px; font-size: 11px; }

  .download-btn, .cta {
    padding: 16px 24px;
    min-width: auto;
  }
}

/* ============================================
   Scroll-Driven Animation System
   - Native CSS SDA with IntersectionObserver fallback
   - GPU-accelerated (transform, opacity, filter only)
   ============================================ */

/* --- SDA Path: Native CSS Scroll-Driven Animations --- */
@supports (animation-timeline: view()) {
  .section {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .sda-fade-up,
  .sda-fade-left,
  .sda-fade-right,
  .sda-scale-reveal,
  .sda-text-reveal,
  .sda-card-enter,
  .sda-parallax-up {
    animation-fill-mode: backwards;
    animation-timing-function: var(--anim-ease-out-expo);
    animation-duration: var(--anim-duration-enter);
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }

  .sda-fade-up { animation-name: sda-fade-up; }
  .sda-fade-left { animation-name: sda-fade-left; }
  .sda-fade-right { animation-name: sda-fade-right; }
  .sda-scale-reveal { animation-name: sda-scale-reveal; }
  .sda-text-reveal { animation-name: sda-text-reveal; }
  .sda-card-enter { animation-name: sda-card-enter; }
  .sda-parallax-up {
    animation-name: sda-parallax-up;
    animation-range: entry 0% exit 100%;
  }

  .sda-delay-1 { animation-range: entry 5% entry 100%; }
  .sda-delay-2 { animation-range: entry 10% entry 100%; }
  .sda-delay-3 { animation-range: entry 15% entry 100%; }
  .sda-delay-4 { animation-range: entry 20% entry 100%; }
  .sda-delay-5 { animation-range: entry 25% entry 100%; }
  .sda-delay-6 { animation-range: entry 30% entry 100%; }

  .feature-card:nth-child(n) { transition-delay: 0s; }
}

/* --- Fallback: IntersectionObserver-based animations --- */
@supports not (animation-timeline: view()) {
  .sda-fade-up,
  .sda-fade-left,
  .sda-fade-right,
  .sda-scale-reveal,
  .sda-text-reveal,
  .sda-card-enter {
    opacity: 0;
    transition: opacity var(--anim-duration-enter) var(--anim-ease-out-expo),
                transform var(--anim-duration-enter) var(--anim-ease-out-expo),
                filter var(--anim-duration-enter) var(--anim-ease-out-expo);
  }

  .sda-fade-up { transform: translateY(60px); }
  .sda-fade-left { transform: translateX(-80px); }
  .sda-fade-right { transform: translateX(80px); }
  .sda-scale-reveal { transform: scale(0.85); filter: blur(8px); }
  .sda-text-reveal { transform: translateY(100%); filter: blur(4px); }
  .sda-card-enter { transform: translateY(40px) scale(0.95); }

  .section.active .sda-fade-up,
  .section.active .sda-fade-left,
  .section.active .sda-fade-right,
  .section.active .sda-scale-reveal,
  .section.active .sda-text-reveal,
  .section.active .sda-card-enter,
  .sda-fade-up.in-view,
  .sda-fade-left.in-view,
  .sda-fade-right.in-view,
  .sda-scale-reveal.in-view,
  .sda-text-reveal.in-view,
  .sda-card-enter.in-view {
    opacity: 1;
    transform: none;
    filter: blur(0);
  }

  .sda-delay-1 { transition-delay: calc(var(--anim-stagger) * 1); }
  .sda-delay-2 { transition-delay: calc(var(--anim-stagger) * 2); }
  .sda-delay-3 { transition-delay: calc(var(--anim-stagger) * 3); }
  .sda-delay-4 { transition-delay: calc(var(--anim-stagger) * 4); }
  .sda-delay-5 { transition-delay: calc(var(--anim-stagger) * 5); }
  .sda-delay-6 { transition-delay: calc(var(--anim-stagger) * 6); }
}

/* --- Mobile: simplify directional animations --- */
@media (max-width: 768px) {
  @supports (animation-timeline: view()) {
    .sda-fade-left,
    .sda-fade-right {
      animation-name: sda-fade-up;
    }
    .sda-parallax-up {
      animation: none;
    }
  }

  @supports not (animation-timeline: view()) {
    .sda-fade-left,
    .sda-fade-right {
      transform: translateY(60px);
    }
  }
}

/* --- Accessibility: respect reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  .sda-fade-up,
  .sda-fade-left,
  .sda-fade-right,
  .sda-scale-reveal,
  .sda-text-reveal,
  .sda-card-enter,
  .sda-parallax-up {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
  }
}