/* ═══════════════════════════════════════════════════════════════════
   PREMIUM MOTION DESIGN — Task #1144157
   Reading progress bar, category pill bounce, settlement stat cascade,
   filter fade, smooth TOC, pricing glow, hero parallax setup.
   GPU-only (transform + opacity). Respects prefers-reduced-motion.
   ═══════════════════════════════════════════════════════════════════ */

/* ── Custom timing/easing tokens (matches task spec) ─────────────── */
:root {
  --pm-ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --pm-ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --pm-duration-fast: 300ms;
  --pm-duration-normal: 400ms;
  --pm-duration-slow: 600ms;
}

/* ── Reading Progress Bar ─────────────────────────────────────────── */
#pm-read-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #2563eb 0%, #60a5fa 60%, #93c5fd 100%);
  z-index: 10000;
  pointer-events: none;
  box-shadow: 0 0 8px rgba(37, 99, 235, 0.5);
  /* No transition — updated via JS on rAF so it tracks scroll exactly */
}

@media (prefers-reduced-motion: reduce) {
  #pm-read-progress {
    display: none;
  }
}

/* ── Settlement Category Pills — Bounce on hover ─────────────────── */
@keyframes pmPillBounce {
  0%   { transform: scale(1); }
  35%  { transform: scale(1.14) translateY(-2px); }
  65%  { transform: scale(0.96); }
  100% { transform: scale(1); }
}

@media (hover: hover) {
  .sr-category-badge:hover,
  .settlement-category-badge:hover,
  [class*="category-pill"]:hover,
  [class*="sr-cat-badge"]:hover,
  [class*="-category-tag"]:hover,
  .sp-category-tag:hover,
  .category-tag:hover {
    animation: pmPillBounce 0.38s var(--pm-ease-bounce) forwards;
    cursor: pointer;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sr-category-badge:hover,
  .settlement-category-badge:hover,
  [class*="category-pill"]:hover,
  [class*="sr-cat-badge"]:hover,
  [class*="-category-tag"]:hover,
  .sp-category-tag:hover,
  .category-tag:hover {
    animation: none;
  }
}

/* ── Settlement Detail: Key stat cards cascade in from left ─────── */
.pm-cascade-left {
  opacity: 0;
  transform: translateX(-18px);
  transition: opacity 0.38s var(--pm-ease-out), transform 0.38s var(--pm-ease-out);
  will-change: transform, opacity;
}

.pm-cascade-left.pm-visible {
  opacity: 1;
  transform: translateX(0);
}

@media (prefers-reduced-motion: reduce) {
  .pm-cascade-left {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ── Filter transitions — no content jump on /settlements ────────── */
.pm-filter-fade {
  transition: opacity 0.22s ease;
}

.pm-filter-fade.pm-fading {
  opacity: 0.35;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .pm-filter-fade {
    transition: none;
  }
  .pm-filter-fade.pm-fading {
    opacity: 1;
  }
}

/* ── Pricing: popular plan pulsing border glow ───────────────────── */
@keyframes pmPricingGlow {
  0%, 100% {
    box-shadow:
      0 0 0 0 rgba(37, 99, 235, 0.35),
      0 8px 32px rgba(37, 99, 235, 0.18);
  }
  50% {
    box-shadow:
      0 0 0 6px rgba(37, 99, 235, 0.0),
      0 12px 48px rgba(37, 99, 235, 0.32);
  }
}

.pm-pricing-popular {
  animation: pmPricingGlow 2.8s ease-in-out infinite !important;
}

@media (prefers-reduced-motion: reduce) {
  .pm-pricing-popular {
    animation: none !important;
  }
}

/* ── Smooth anchor scroll for guide TOC links ───────────────────── */
/* scroll-behavior on parent; JS handles offset for fixed nav */
.guide-toc,
.seo-guide-toc,
[class*="toc-nav"],
[class*="guide-sidebar-toc"] {
  scroll-behavior: smooth;
}

/* ── Hero background parallax wrapper ────────────────────────────── */
/* JS sets transform based on scrollY; CSS just sets up GPU layer */
.pm-parallax-bg {
  will-change: transform;
  transition: none;
}

/* ── Button hover micro-interaction enhancements ─────────────────── */
/* Enhance existing hover states with consistent shadow growth */
@media (hover: hover) {
  .rs-btn-primary:hover,
  .sp-btn--primary:hover,
  .cta-btn:hover,
  [class*="btn-primary"]:hover {
    transform: translateY(-2px) scale(1.02);
    transition: transform 0.22s var(--pm-ease-out), box-shadow 0.22s ease;
  }

  .rs-btn-primary:active,
  .sp-btn--primary:active,
  .cta-btn:active {
    transform: translateY(0) scale(0.99);
  }
}

@media (prefers-reduced-motion: reduce) {
  .rs-btn-primary:hover,
  .sp-btn--primary:hover,
  .cta-btn:hover,
  [class*="btn-primary"]:hover {
    transform: none;
  }
}

/* ── Navigation link hover: underline slides from left ───────────── */
@media (hover: hover) {
  .nav-flat-link {
    position: relative;
  }

  .nav-flat-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0%;
    height: 2px;
    background: #2563eb;
    transition: width 0.22s var(--pm-ease-out);
    border-radius: 2px;
  }

  .nav-flat-link:hover::after {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-flat-link::after {
    display: none;
  }
}

/* ── Settlement card grid stagger (applied by JS via data attrs) ──── */
[data-stagger-item] {
  /* Stagger handled by page-animations.js — CSS just provides base state */
}

/* ── Payout/activity ticker: smooth slide-in for new items ────────── */
.pm-ticker-in {
  animation: pmTickerIn 0.45s var(--pm-ease-out) both;
}

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

@media (prefers-reduced-motion: reduce) {
  .pm-ticker-in {
    animation: none;
  }
}