/* ============================================
   D-CENTRAL ANIMATIONS
   Advanced motion & micro-interactions
   ============================================ */

/* ── Staggered Fade-In for Grid Items ── */
.dc-stagger-grid > .dc-animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.dc-stagger-grid > .dc-animate-on-scroll.dc-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Delays set via JS, but provide CSS fallbacks for up to 12 items */
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(1) { transition-delay: 0ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(2) { transition-delay: 80ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(3) { transition-delay: 160ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(4) { transition-delay: 240ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(5) { transition-delay: 320ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(6) { transition-delay: 400ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(7) { transition-delay: 480ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(8) { transition-delay: 560ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(9) { transition-delay: 640ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(10) { transition-delay: 720ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(11) { transition-delay: 800ms; }
.dc-stagger-grid > .dc-animate-on-scroll:nth-child(12) { transition-delay: 880ms; }


/* ── Parallax-Ready Classes ── */
.dc-parallax {
  will-change: transform;
  transition: transform 0.1s linear;
}

.dc-parallax--slow {
  --dc-parallax-speed: 0.03;
}

.dc-parallax--medium {
  --dc-parallax-speed: 0.06;
}

.dc-parallax--fast {
  --dc-parallax-speed: 0.1;
}


/* ── Card Hover Micro-Interactions ── */
.dc-card--hover-tilt {
  transition: transform var(--dc-transition-base), box-shadow var(--dc-transition-base);
}

.dc-card--hover-tilt:hover {
  transform: perspective(800px) rotateY(-2deg) rotateX(1deg) translateY(-4px);
  box-shadow: var(--dc-shadow-lg), var(--dc-accent-glow-sm);
}

.dc-card--hover-lift {
  transition: transform var(--dc-transition-base), box-shadow var(--dc-transition-base);
}

.dc-card--hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: var(--dc-shadow-xl), var(--dc-accent-glow-md);
}

.dc-card--hover-glow {
  transition: box-shadow var(--dc-transition-base), border-color var(--dc-transition-base);
}

.dc-card--hover-glow:hover {
  box-shadow: var(--dc-accent-glow-lg);
  border-color: var(--dc-accent);
}


/* ── Button Ripple Effect ── */
.dc-btn--ripple {
  position: relative;
  overflow: hidden;
}

.dc-btn--ripple .dc-ripple {
  position: absolute;
  border-radius: var(--dc-radius-full);
  background-color: rgba(255, 110, 0, 0.4);
  transform: scale(0);
  animation: dc-ripple-expand 0.6s ease-out forwards;
  pointer-events: none;
}

.dc-btn--primary.dc-btn--ripple .dc-ripple {
  background-color: rgba(255, 255, 255, 0.3);
}

@keyframes dc-ripple-expand {
  to {
    transform: scale(4);
    opacity: 0;
  }
}


/* ── Image Reveal Animation ── */
.dc-reveal {
  position: relative;
  overflow: hidden;
}

.dc-reveal > img,
.dc-reveal > picture,
.dc-reveal__inner {
  clip-path: inset(0 100% 0 0);
  transition: clip-path 0.8s cubic-bezier(0.77, 0, 0.175, 1);
}

.dc-reveal.dc-visible > img,
.dc-reveal.dc-visible > picture,
.dc-reveal.dc-visible .dc-reveal__inner {
  clip-path: inset(0 0 0 0);
}

/* Variant: reveal from bottom */
.dc-reveal--up > img,
.dc-reveal--up > picture,
.dc-reveal--up .dc-reveal__inner {
  clip-path: inset(100% 0 0 0);
}

.dc-reveal--up.dc-visible > img,
.dc-reveal--up.dc-visible > picture,
.dc-reveal--up.dc-visible .dc-reveal__inner {
  clip-path: inset(0 0 0 0);
}


/* ── Number Ticker Refinement ── */
.dc-ticker {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
}

.dc-ticker__digit {
  display: inline-block;
  transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes dc-tick-in {
  from {
    transform: translateY(100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.dc-ticker__digit--animate {
  animation: dc-tick-in 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}


/* ── Pulsing Glow for Live/Active Indicators ── */
@keyframes dc-pulse-glow {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(255, 110, 0, 0.5);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(255, 110, 0, 0);
  }
}

@keyframes dc-pulse-glow-success {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
  }
}

.dc-pulse {
  animation: dc-pulse-glow 2s ease-in-out infinite;
}

.dc-pulse--success {
  animation: dc-pulse-glow-success 2s ease-in-out infinite;
}

.dc-live-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--dc-radius-full);
  background-color: var(--dc-accent);
  animation: dc-pulse-glow 2s ease-in-out infinite;
}

.dc-live-dot--success {
  background-color: var(--dc-success);
  animation: dc-pulse-glow-success 2s ease-in-out infinite;
}


/* ── Smooth Accordion Open/Close ── */
.dc-accordion__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.dc-accordion__item--open .dc-accordion__content {
  /* max-height set by JS to scrollHeight */
}

.dc-accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--dc-space-md) var(--dc-space-lg);
  background: none;
  border: none;
  color: var(--dc-text-primary);
  font-family: var(--dc-font-heading);
  font-size: var(--dc-text-base);
  font-weight: var(--dc-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
  text-align: left;
  transition: color var(--dc-transition-fast);
}

.dc-accordion__trigger:hover {
  color: var(--dc-accent);
}

.dc-accordion__icon {
  width: 20px;
  height: 20px;
  transition: transform var(--dc-transition-base);
  flex-shrink: 0;
  color: var(--dc-text-muted);
}

.dc-accordion__item--open .dc-accordion__icon {
  transform: rotate(180deg);
  color: var(--dc-accent);
}


/* ── Page Transition Fade ── */
@keyframes dc-page-enter {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes dc-page-exit {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-8px);
  }
}

.dc-page-transition {
  animation: dc-page-enter 0.3s ease forwards;
}

.dc-page-transition--exit {
  animation: dc-page-exit 0.3s ease forwards;
}


/* ── Slide-In Variants ── */
@keyframes dc-slide-in-left {
  from { transform: translateX(-30px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes dc-slide-in-right {
  from { transform: translateX(30px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes dc-slide-in-up {
  from { transform: translateY(30px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

.dc-animate-slide-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.dc-animate-slide-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.dc-animate-slide-left.dc-visible,
.dc-animate-slide-right.dc-visible {
  opacity: 1;
  transform: translateX(0);
}


/* ── Scale-In ── */
.dc-animate-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.dc-animate-scale.dc-visible {
  opacity: 1;
  transform: scale(1);
}


/* ── Back-to-Top Button ── */
.dc-back-to-top {
  position: fixed;
  bottom: var(--dc-space-xl);
  right: var(--dc-space-xl);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--dc-bg-elevated);
  border: 1px solid var(--dc-border);
  border-radius: var(--dc-radius-full);
  color: var(--dc-accent);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--dc-transition-base),
              visibility var(--dc-transition-base),
              transform var(--dc-transition-base),
              background-color var(--dc-transition-fast);
  z-index: 50;
  box-shadow: var(--dc-shadow-md);
}

.dc-back-to-top--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dc-back-to-top:hover {
  background-color: var(--dc-accent);
  color: var(--dc-text-inverse);
  border-color: var(--dc-accent);
  box-shadow: var(--dc-accent-glow-md);
}

.dc-back-to-top svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}


/* ── Reading Progress Bar ── */
.dc-reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background-color: var(--dc-accent);
  box-shadow: var(--dc-accent-glow-sm);
  z-index: 1010;
  transition: width 50ms linear;
}