/* ============================================================================
   ICONIC Human Design Education, PMA — Premium Animations & Micro-interactions
   GPU-accelerated only (transform + opacity). No layout thrashing.
   Respects prefers-reduced-motion.
   ============================================================================ */

/* ── Animation Tokens ────────────────────────────────────────────────────── */
:root {
  --ease-out-expo:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart:  cubic-bezier(0.25, 1, 0.5, 1);
  --ease-spring:     cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth:     cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast:        150ms;
  --dur-base:        250ms;
  --dur-slow:        400ms;
  --dur-xslow:       600ms;
}

/* ── Reduced-motion kill switch ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .scroll-reveal,
  .scroll-reveal-up,
  .scroll-reveal-left,
  .scroll-reveal-right,
  .scroll-reveal-scale {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ============================================================================
   1. SCROLL REVEAL — fade-up, left, right, scale
   Elements start invisible; JS adds .is-visible when in viewport
   ============================================================================ */

.scroll-reveal,
.scroll-reveal-up {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  will-change: opacity, transform;
}
.scroll-reveal-left {
  opacity: 0;
  transform: translateX(-28px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  will-change: opacity, transform;
}
.scroll-reveal-right {
  opacity: 0;
  transform: translateX(28px);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-out-expo);
  will-change: opacity, transform;
}
.scroll-reveal-scale {
  opacity: 0;
  transform: scale(0.94);
  transition:
    opacity var(--dur-slow) var(--ease-out-expo),
    transform var(--dur-slow) var(--ease-spring);
  will-change: opacity, transform;
}

/* Staggered children — add delay-1 … delay-6 to child elements */
.stagger-children > *,
[class*="scroll-reveal"].delay-1  { transition-delay: 60ms;  }
[class*="scroll-reveal"].delay-2  { transition-delay: 120ms; }
[class*="scroll-reveal"].delay-3  { transition-delay: 180ms; }
[class*="scroll-reveal"].delay-4  { transition-delay: 240ms; }
[class*="scroll-reveal"].delay-5  { transition-delay: 300ms; }
[class*="scroll-reveal"].delay-6  { transition-delay: 380ms; }

/* Activated state */
.scroll-reveal.is-visible,
.scroll-reveal-up.is-visible,
.scroll-reveal-left.is-visible,
.scroll-reveal-right.is-visible,
.scroll-reveal-scale.is-visible {
  opacity: 1;
  transform: none;
}

/* ============================================================================
   2. PAGE TRANSITION — fade-in on load / section switch
   ============================================================================ */

@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

.page-transition-enter {
  animation: pageFadeIn var(--dur-slow) var(--ease-out-expo) both;
}

/* Section-switcher fade (works with the existing .section.active pattern) */
.section {
  transition: opacity var(--dur-base) var(--ease-smooth);
}
.section.is-exiting {
  opacity: 0;
  pointer-events: none;
}
.section.is-entering {
  animation: pageFadeIn var(--dur-slow) var(--ease-out-expo) both;
}

/* ============================================================================
   3. STICKY HEADER — shrinks / compresses on scroll
   JS adds .scrolled to the nav element
   ============================================================================ */

.site-nav,
nav {
  transition:
    height var(--dur-base) var(--ease-smooth),
    padding var(--dur-base) var(--ease-smooth),
    box-shadow var(--dur-base) var(--ease-smooth),
    background var(--dur-base) var(--ease-smooth),
    backdrop-filter var(--dur-base) var(--ease-smooth);
}

.site-nav.scrolled {
  height: 48px !important;
  box-shadow: 0 2px 20px rgba(0,0,0,0.4), 0 0 0 1px rgba(99,58,133,0.08);
  background: rgba(0, 0, 0, 0.92) !important;
  backdrop-filter: blur(18px) !important;
}
[data-theme="light"] .site-nav.scrolled {
  background: rgba(247, 243, 239, 0.96) !important;
}

/* Inline nav (homepage) shrink */
nav.scrolled {
  padding-top: 0.75rem !important;
  padding-bottom: 0.75rem !important;
}

/* ============================================================================
   4. PROGRESS BAR — reading progress, top of viewport
   JS renders and updates #reading-progress
   ============================================================================ */

#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 99999;
  pointer-events: none;
  transition: width 80ms linear;
  transform-origin: left;
  box-shadow: 0 0 6px rgba(52, 210, 226, 0.45);
}

/* ============================================================================
   5. BUTTON MICRO-INTERACTIONS — scale + shadow lift
   Enhances existing .btn, .btn-gold, .btn-outline-pill
   ============================================================================ */

.btn,
.btn-gold,
.btn-outline,
.btn-outline-pill,
.btn-primary,
.btn-accent,
.btn-teal,
.btn-purple,
.nav-cta,
.btn-signup,
.chart-cta-link {
  transition:
    transform var(--dur-fast) var(--ease-spring),
    box-shadow var(--dur-base) var(--ease-smooth),
    background var(--dur-base) var(--ease-smooth),
    border-color var(--dur-base) var(--ease-smooth),
    opacity var(--dur-fast) var(--ease-smooth) !important;
}

.btn:hover:not(:disabled),
.btn-outline:hover:not(:disabled),
.btn-primary:hover:not(:disabled),
.btn-accent:hover:not(:disabled),
.btn-teal:hover:not(:disabled),
.btn-purple:hover:not(:disabled),
.nav-cta:hover,
.btn-signup:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 6px 20px rgba(99, 58, 133, 0.3);
}

.btn-gold:hover:not(:disabled),
.btn-outline-pill:hover:not(:disabled),
.chart-cta-link:hover {
  transform: translateY(-3px) scale(1.025);
  box-shadow: 0 10px 30px rgba(99, 58, 133, 0.45);
}

.btn:active:not(:disabled),
.btn-gold:active:not(:disabled),
.btn-outline-pill:active:not(:disabled),
.chart-cta-link:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  transition-duration: 80ms !important;
}

/* ============================================================================
   6. CARD HOVER LIFT — subtle elevation on hover
   ============================================================================ */

.card,
.type-card,
.cred-item,
.signup-card,
.chart-cta-card,
.testimonial,
.form-card,
[class*="-card"]:not(.chart-cta-link) {
  transition:
    transform var(--dur-base) var(--ease-out-quart),
    box-shadow var(--dur-base) var(--ease-out-quart),
    border-color var(--dur-base) var(--ease-smooth) !important;
}

.card:hover,
.type-card:hover,
.cred-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 35px rgba(99, 58, 133, 0.22);
  border-color: var(--border-strong) !important;
}

/* ============================================================================
   7. FORM INPUT FOCUS GLOW
   ============================================================================ */

.form-input,
.form-group input,
.form-group select,
.form-group textarea,
.signup-input {
  transition:
    border-color var(--dur-base) var(--ease-smooth),
    box-shadow var(--dur-base) var(--ease-smooth) !important;
}

.form-input:focus,
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.signup-input:focus {
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px rgba(99, 58, 133, 0.18), 0 2px 8px rgba(0,0,0,0.15) !important;
  outline: none;
}

/* ============================================================================
   8. SKELETON SCREENS — shimmer placeholders
   Usage: <div class="skeleton skeleton-text"></div>
          <div class="skeleton skeleton-title"></div>
          <div class="skeleton skeleton-avatar"></div>
          <div class="skeleton skeleton-card"></div>
   ============================================================================ */

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--surface-2) 25%,
    rgba(99, 58, 133, 0.08) 50%,
    var(--surface-2) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.6s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

[data-theme="light"] .skeleton {
  background: linear-gradient(
    90deg,
    #e8e0f0 25%,
    rgba(99, 58, 133, 0.12) 50%,
    #e8e0f0 75%
  );
  background-size: 200% 100%;
}

.skeleton-text   { height: 0.9em; width: 80%; margin: 0.4rem 0; }
.skeleton-title  { height: 1.4em; width: 55%; margin: 0.5rem 0; border-radius: var(--radius-sm); }
.skeleton-avatar { width: 48px; height: 48px; border-radius: 50%; flex-shrink: 0; }
.skeleton-avatar-lg { width: 80px; height: 80px; border-radius: 50%; flex-shrink: 0; }

.skeleton-card {
  height: 180px;
  border-radius: var(--radius-lg);
  width: 100%;
}
.skeleton-btn {
  height: 2.5rem;
  width: 140px;
  border-radius: var(--radius-pill);
}
.skeleton-img {
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 */
  border-radius: var(--radius-lg);
}

/* Smooth skeleton → content swap */
.skeleton-container {
  transition: opacity var(--dur-slow) var(--ease-smooth);
}
.skeleton-container.loaded {
  opacity: 0;
  pointer-events: none;
  position: absolute;
}

/* ============================================================================
   9. PARALLAX — hero sections
   JS adjusts --parallax-offset CSS var on scroll
   ============================================================================ */

[data-parallax] {
  will-change: transform;
}

/* ============================================================================
   10. SUCCESS STATE ANIMATIONS
   ============================================================================ */

/* Checkmark draws itself */
@keyframes checkDraw {
  from { stroke-dashoffset: 50; }
  to   { stroke-dashoffset: 0;  }
}
@keyframes checkCircle {
  from { stroke-dashoffset: 157; opacity: 0; }
  50%  { opacity: 1; }
  to   { stroke-dashoffset: 0; }
}
@keyframes checkBounce {
  0%   { transform: scale(0.6);  opacity: 0; }
  60%  { transform: scale(1.15); opacity: 1; }
  80%  { transform: scale(0.95); }
  100% { transform: scale(1); }
}

.success-checkmark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  animation: checkBounce 0.5s var(--ease-spring) both;
}

.success-checkmark svg circle {
  stroke-dasharray: 157;
  stroke-dashoffset: 157;
  animation: checkCircle 0.5s var(--ease-out-expo) 0.1s both;
}

.success-checkmark svg path,
.success-checkmark svg polyline {
  stroke-dasharray: 50;
  stroke-dashoffset: 50;
  animation: checkDraw 0.3s var(--ease-out-quart) 0.4s both;
}

/* Milestone confetti burst (add class .confetti-burst to trigger) */
@keyframes confettiPop {
  0%   { transform: scale(0) rotate(0deg);   opacity: 1; }
  80%  { transform: scale(1.2) rotate(20deg); opacity: 1; }
  100% { transform: scale(1) rotate(15deg);   opacity: 0; }
}

/* ============================================================================
   11. PULSE GLOW — for activated/highlighted elements
   Usage: add class .pulse-glow
   ============================================================================ */

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(99, 58, 133, 0); }
  50%       { box-shadow: 0 0 0 8px rgba(99, 58, 133, 0.12); }
}
@keyframes pulseGlowAccent {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52, 210, 226, 0); }
  50%       { box-shadow: 0 0 0 8px rgba(52, 210, 226, 0.12); }
}

.pulse-glow {
  animation: pulseGlow 2.4s var(--ease-smooth) infinite;
}
.pulse-glow-accent {
  animation: pulseGlowAccent 2.4s var(--ease-smooth) infinite;
}

/* ============================================================================
   12. LINK UNDERLINE SLIDE
   ============================================================================ */

.link-slide {
  position: relative;
  text-decoration: none;
}
.link-slide::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--dur-base) var(--ease-out-expo);
}
.link-slide:hover::after { width: 100%; }

/* ============================================================================
   13. FADE IN — utility for dynamically inserted content
   ============================================================================ */

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}
@keyframes fadeInFast {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.anim-fade-in      { animation: fadeIn     var(--dur-slow) var(--ease-out-expo) both; }
.anim-fade-in-fast { animation: fadeInFast var(--dur-base) var(--ease-smooth)   both; }

/* ============================================================================
   14. TOGGLE SWITCH — smooth animated toggle
   ============================================================================ */

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-switch .toggle-track {
  position: absolute;
  inset: 0;
  background: var(--surface-2);
  border-radius: 12px;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: background var(--dur-base) var(--ease-smooth), border-color var(--dur-base);
}
.toggle-switch .toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform var(--dur-base) var(--ease-spring), background var(--dur-base);
}
.toggle-switch input:checked ~ .toggle-track {
  background: var(--primary);
  border-color: var(--primary-light);
}
.toggle-switch input:checked ~ .toggle-track .toggle-thumb {
  transform: translateX(20px);
  background: #fff;
}

/* ============================================================================
   15. BLUR-UP IMAGE LOADING
   Usage: <img class="blur-up" data-src="..." src="tiny-placeholder.jpg">
   JS swaps src and adds .loaded
   ============================================================================ */

.blur-up {
  filter: blur(8px);
  transform: scale(1.02);
  transition: filter 0.4s var(--ease-smooth), transform 0.4s var(--ease-smooth);
  will-change: filter, transform;
}
.blur-up.loaded {
  filter: blur(0);
  transform: scale(1);
}

/* ============================================================================
   16. ANNOUNCEMENT BAR ENTRANCE
   ============================================================================ */

@keyframes slideDown {
  from { transform: translateY(-100%); opacity: 0; }
  to   { transform: translateY(0);     opacity: 1; }
}
.announcement-bar-enter {
  animation: slideDown 0.4s var(--ease-out-expo) both;
}

/* ============================================================================
   17. HERO TEXT STAGGER (auto-applied by JS to .hero h1, .hero p, .hero .btn-gold)
   ============================================================================ */

.hero-anim-1 {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.7s var(--ease-out-expo) 0.1s both;
}
.hero-anim-2 {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.7s var(--ease-out-expo) 0.25s both;
}
.hero-anim-3 {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.7s var(--ease-out-expo) 0.4s both;
}
.hero-anim-4 {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.7s var(--ease-out-expo) 0.55s both;
}