/* Motion layer shared by the portfolio and case-study pages. */
:root {
  --motion-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-fast: 260ms;
  --motion-base: 720ms;
  --hero-pointer-x: 70%;
  --hero-pointer-y: 36%;
}

.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 999;
  width: 100%;
  height: 3px;
  pointer-events: none;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, #60a5fa, #2563eb);
  box-shadow: 0 0 14px rgba(96, 165, 250, 0.7);
}

.nav {
  transition: box-shadow var(--motion-fast) ease,
              background-color var(--motion-fast) ease;
}

.nav.is-scrolled {
  box-shadow: 0 10px 30px rgba(15, 31, 61, 0.18);
}

.hero::after,
.cs-hero::after {
  content: '';
  position: absolute;
  inset: -25%;
  pointer-events: none;
  opacity: 0.72;
  background: radial-gradient(
    circle at var(--hero-pointer-x) var(--hero-pointer-y),
    rgba(96, 165, 250, 0.22),
    transparent 28%
  );
  transition: opacity 500ms ease;
}

.cs-hero {
  position: relative;
  overflow: hidden;
}

.hero__inner,
.cs-hero__inner {
  position: relative;
  z-index: 1;
}

.js .hero-intro-item {
  opacity: 0;
  transform: translateY(22px);
}

.js.is-entered .hero-intro-item {
  animation: hero-enter 820ms var(--motion-ease) forwards;
  animation-delay: var(--hero-delay, 0ms);
}

@keyframes hero-enter {
  to { opacity: 1; transform: translateY(0); }
}

.js .reveal-item {
  opacity: 0;
  transform: translate3d(0, 30px, 0);
  transition:
    opacity var(--motion-base) var(--motion-ease),
    transform var(--motion-base) var(--motion-ease);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.js .reveal-item[data-reveal='left'] { transform: translate3d(-34px, 0, 0); }
.js .reveal-item[data-reveal='right'] { transform: translate3d(34px, 0, 0); }
.js .reveal-item[data-reveal='scale'] { transform: translate3d(0, 20px, 0) scale(0.97); }

.js .reveal-item.is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
  will-change: auto;
}

.section-header .section-label,
.cs-section h2 {
  position: relative;
}

.section-header .section-label::after,
.cs-section h2::after {
  content: '';
  display: inline-block;
  width: 22px;
  height: 2px;
  margin-left: 9px;
  vertical-align: middle;
  border-radius: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 650ms var(--motion-ease) 180ms;
}

.section-header.is-visible .section-label::after,
.cs-section.is-visible h2::after {
  transform: scaleX(1);
}

.case-card,
.proj-card,
.cap-card,
.meta-item,
.cs-outcome {
  transform-style: preserve-3d;
}

.tilt-card {
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --lift: 0px;
  transform: perspective(900px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) translateY(var(--lift));
  transition: transform 180ms ease, box-shadow 220ms ease;
}

.tilt-card:hover {
  --lift: -4px;
}

.btn {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: -2px;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(110deg, transparent 25%, rgba(255,255,255,0.25) 48%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 560ms var(--motion-ease);
}

.btn:hover::after { transform: translateX(120%); }

.tool-tag,
.pathway-pill,
.case-tag,
.cs-tag {
  transition: transform var(--motion-fast) var(--motion-ease),
              background-color var(--motion-fast) ease,
              border-color var(--motion-fast) ease,
              color var(--motion-fast) ease;
}

.tool-tag:hover,
.pathway-pill:hover { transform: translateY(-2px); }

.cred-item__number.is-counting {
  font-variant-numeric: tabular-nums;
}

.tl-item::before {
  content: '';
  position: absolute;
  left: -13px;
  top: 36px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #2563eb;
  box-shadow: 0 0 0 5px rgba(37, 99, 235, 0.1);
  transform: scale(0);
  transition: transform 420ms var(--motion-ease) 250ms;
}

.tl-item.is-visible::before { transform: scale(1); }

@media (max-width: 700px) {
  .hero::after,
  .cs-hero::after { opacity: 0.45; }

  .tl-item::before { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-progress { display: none; }

  .js .hero-intro-item,
  .js.is-entered .hero-intro-item,
  .js .reveal-item,
  .js .reveal-item[data-reveal] {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }

  .tilt-card,
  .tilt-card:hover { transform: none; transition: none; }

  .section-header .section-label::after,
  .cs-section h2::after { transform: scaleX(1); transition: none; }
}