/* ═══════════════════════════════════════════════════════════════
   CasperGuard Motion Layer
   Spring-driven reveals · smart header · parallax · nav physics
   Preserves existing theme tokens — transform/opacity only
   ═══════════════════════════════════════════════════════════════ */

/* ── Smart header ─────────────────────────────────────────────── */
.topbar {
  --header-translate: 0%;
  --header-blur: 0;
  --topbar-pad-y: 1rem;
  position: sticky;
  top: 0;
  z-index: 150;
  padding: 0;
  border-bottom: none;
  background: transparent;
  transform: translate3d(0, var(--header-translate), 0);
  will-change: transform;
  transition: none;
}

.topbar-surface {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg-shell) calc(72% + var(--header-blur) * 28%), transparent);
  backdrop-filter: blur(calc(var(--header-blur) * 18px));
  -webkit-backdrop-filter: blur(calc(var(--header-blur) * 18px));
  border-bottom: 1px solid color-mix(in srgb, var(--border) calc(40% + var(--header-blur) * 60%), transparent);
  opacity: calc(0.55 + var(--header-blur) * 0.45);
  pointer-events: none;
}

.topbar-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: var(--topbar-pad-y) 1.75rem;
  transition: padding 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.topbar.is-compact .topbar-inner {
  --topbar-pad-y: 0.65rem;
}

.topbar.is-scrolled .topbar-surface {
  box-shadow: 0 12px 40px rgba(0, 0, 0, calc(var(--header-blur) * 0.25));
}

/* ── Scroll reveal (spring-driven via --reveal-progress) ──────── */
[data-reveal] {
  --reveal-progress: 0;
  --reveal-y: 32px;
  --reveal-scale: 0.965;
  opacity: calc(0.25 + var(--reveal-progress) * 0.75);
  transform:
    translate3d(0, calc((1 - var(--reveal-progress)) * var(--reveal-y)), 0)
    scale(calc(var(--reveal-scale) + (1 - var(--reveal-scale)) * var(--reveal-progress)));
  transform-origin: center top;
  contain: layout style;
}

[data-reveal="block"] {
  --reveal-y: 40px;
}

[data-reveal].is-settled {
  will-change: auto;
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .topbar { transform: none; }
}

/* ── Narrative sections & organic transitions ─────────────────── */
.page-canvas {
  position: relative;
  isolation: isolate;
}

.narrative-block {
  position: relative;
  z-index: 1;
  padding-bottom: 0.25rem;
}

.narrative-block--overlap {
  margin-top: -1.25rem;
  z-index: 2;
}

.section-wave {
  display: block;
  width: 100%;
  height: 48px;
  margin: 0.5rem 0 0.25rem;
  color: var(--bg);
  pointer-events: none;
  position: relative;
  z-index: 1;
  transform: translateZ(0);
}

.section-wave path {
  fill: currentColor;
  opacity: 0.35;
}

[data-theme="charcoal"] .section-wave { color: var(--bg-card-solid); }
[data-theme="chalk"] .section-wave { color: var(--bg-card); }

.section-wave--flip {
  transform: scaleY(-1) translateZ(0);
  margin-top: -0.5rem;
  margin-bottom: 0.75rem;
}

.narrative-block--angled {
  clip-path: polygon(0 2%, 100% 0, 100% 100%, 0 100%);
  padding-top: 1.5rem;
}

.narrative-block .section-head {
  border: none;
  margin-top: 0;
}

.narrative-block + .narrative-block .section-head {
  margin-top: 0.75rem;
}

/* ── Parallax depth field ─────────────────────────────────────── */
.parallax-field {
  position: absolute;
  inset: -10% 0 40%;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.parallax-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.45;
  will-change: transform;
  transform: translate3d(0, 0, 0);
}

.parallax-orb--1 {
  width: 420px; height: 420px;
  top: -8%; right: -5%;
  background: radial-gradient(circle, var(--purple-glow), transparent 70%);
}

.parallax-orb--2 {
  width: 320px; height: 320px;
  top: 35%; left: -8%;
  background: radial-gradient(circle, rgba(96, 165, 250, 0.25), transparent 70%);
  opacity: 0.35;
}

.parallax-orb--3 {
  width: 240px; height: 240px;
  bottom: 10%; right: 20%;
  background: radial-gradient(circle, rgba(74, 222, 128, 0.2), transparent 70%);
  opacity: 0.3;
}

.hero-art .hero-orb {
  will-change: transform;
}

/* ── Nav micro-interactions ───────────────────────────────────── */
.nav-interactive {
  position: relative;
  overflow: hidden;
  --nav-mx: 0.5;
  --nav-my: 0.5;
  --nav-glow: 0;
}

.nav-interactive::before {
  content: "";
  position: absolute;
  width: 120px; height: 120px;
  left: calc(var(--nav-mx) * 100%);
  top: calc(var(--nav-my) * 100%);
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, var(--purple-glow) 0%, transparent 70%);
  opacity: calc(var(--nav-glow) * 0.55);
  pointer-events: none;
}

.nav-underline {
  position: absolute;
  left: 0.75rem;
  right: 0.75rem;
  bottom: 0.35rem;
  height: 2px;
  border-radius: 999px;
  background: var(--purple-bright);
  transform: scaleX(0);
  transform-origin: calc(var(--nav-mx) * 100%) 50%;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
}

.nav-interactive:hover .nav-underline,
.nav-interactive.active .nav-underline {
  transform: scaleX(1);
}

.nav-sub-link.nav-interactive .nav-underline {
  left: 0.65rem;
  right: 0.65rem;
  bottom: 0.2rem;
}

.nav-link.nav-interactive:hover,
.nav-sub-link.nav-interactive:hover {
  transform: translate3d(
    calc((var(--nav-mx) - 0.5) * 4px),
    calc((var(--nav-my) - 0.5) * 3px),
    0
  );
}

.nav-link.nav-interactive,
.nav-sub-link.nav-interactive {
  transition: transform 0.08s linear;
}

.link-btn {
  position: relative;
  display: inline-flex;
}

.link-btn::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1.5px;
  background: var(--purple-bright);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.38s cubic-bezier(0.22, 1, 0.36, 1);
}

.link-btn:hover::after { transform: scaleX(1); }

.stat-card,
.asset-card,
.profile-card,
.analytics-card,
.agent-card,
.contract-card {
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.45s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.25s ease;
}

.stat-card:hover,
.asset-card:hover,
.agent-card:hover,
.contract-card:hover {
  transform: translate3d(0, -3px, 0);
}

.timeline-item[data-reveal] {
  --reveal-y: 20px;
}

.right-rail [data-reveal] {
  --reveal-y: 24px;
}

.page {
  display: none;
}

.page.active {
  display: block;
  animation: pageEnter 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes pageEnter {
  from {
    opacity: 0;
    transform: translate3d(0, 12px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page.active { animation: none; }
}

[data-reveal].is-revealed .progress-fill,
[data-reveal].is-revealed .bar-fill {
  transition: width 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}