/**
 * St Raphael Health - Animation System
 * 2026 Modernization: Subtle, Purposeful, Progressive
 *
 * Guidelines:
 * - Fade-in: 400-500ms ease-out
 * - Hover transitions: 200-300ms ease
 * - Subtle parallax and momentum cues
 * - No aggressive, bouncy, or playful animations
 * - Respect reduced motion preferences
 */

/* ============================================
   CSS VARIABLES FOR ANIMATIONS
   ============================================ */

:root {
  --anim-duration-fast: 200ms;
  --anim-duration-normal: 300ms;
  --anim-duration-slow: 500ms;
  --anim-duration-slower: 800ms;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-subtle: cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* ============================================
   FADE-IN ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInSoft {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scroll-triggered fade-in */
[data-animate] {
  opacity: 0;
  animation: fadeIn var(--anim-duration-slow) var(--ease-out) forwards;
}

/* Stagger delays */
[data-animate]:nth-child(1) { animation-delay: 0ms; }
[data-animate]:nth-child(2) { animation-delay: 80ms; }
[data-animate]:nth-child(3) { animation-delay: 160ms; }
[data-animate]:nth-child(4) { animation-delay: 240ms; }
[data-animate]:nth-child(5) { animation-delay: 320ms; }
[data-animate]:nth-child(6) { animation-delay: 400ms; }

/* Applied by JS when element enters viewport */
.animate-in {
  animation: fadeIn var(--anim-duration-slow) var(--ease-out) forwards;
}

/* ============================================
   NAVIGATION
   ============================================ */

/* Glassmorphism header */
header {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all var(--anim-duration-normal) ease;
}

header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 4px 20px rgba(26, 26, 46, 0.06);
}

/* Navigation links */
nav a {
  transition: color var(--anim-duration-fast) ease;
  position: relative;
}

nav a:hover {
  color: var(--color-gold-primary);
}

/* ============================================
   BUTTON ANIMATIONS
   ============================================ */

.btn,
.btn-primary,
.btn-secondary,
button[type="submit"] {
  transition: all var(--anim-duration-normal) ease;
}

.btn:hover,
.btn-primary:hover,
.btn-secondary:hover {
  transform: translateY(-2px);
}

.btn:active,
.btn-primary:active,
.btn-secondary:active {
  transform: translateY(0);
}

/* Arrow animation on button hover */
.btn svg,
.btn-primary svg,
.btn-secondary svg {
  transition: transform var(--anim-duration-fast) ease;
}

.btn:hover svg,
.btn-primary:hover svg,
.btn-secondary:hover svg {
  transform: translateX(4px);
}

/* ============================================
   CARD ANIMATIONS
   ============================================ */

.card,
.card-floating,
.stat-circle,
.metric-float {
  transition: all var(--anim-duration-normal) var(--ease-out);
}

.card:hover {
  transform: translateY(-4px);
}

.card-floating:hover {
  transform: translateY(-8px);
}

.stat-circle:hover {
  transform: scale(1.05);
}

/* ============================================
   STAT ANIMATIONS
   ============================================ */

.metric {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--anim-duration-slow) ease,
              transform var(--anim-duration-slow) ease;
}

.metric.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stat circle pulse on load */
@keyframes statPulse {
  0% {
    box-shadow: 0 8px 32px rgba(212, 175, 92, 0.15);
  }
  50% {
    box-shadow: 0 8px 40px rgba(212, 175, 92, 0.25);
  }
  100% {
    box-shadow: 0 8px 32px rgba(212, 175, 92, 0.15);
  }
}

.stat-circle {
  animation: statPulse 3s ease-in-out infinite;
}

/* ============================================
   PROCESS FLOW ANIMATIONS
   ============================================ */

.process-step-number {
  transition: all var(--anim-duration-normal) ease;
}

.process-step:hover .process-step-number {
  transform: scale(1.1);
}

/* Timeline items */
.timeline-modern-item::before {
  transition: all var(--anim-duration-normal) ease;
}

.timeline-modern-item:hover::before {
  transform: translateX(-5px) scale(1.2);
}

/* ============================================
   FORM ANIMATIONS
   ============================================ */

input,
textarea,
select {
  transition: border-color var(--anim-duration-fast) ease,
              box-shadow var(--anim-duration-fast) ease;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--color-gold-primary);
  box-shadow: 0 0 0 3px rgba(212, 175, 92, 0.1);
  outline: none;
}

/* Error shake */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

.form-field.error input,
.form-field.error textarea {
  animation: shake var(--anim-duration-normal) ease;
}

/* ============================================
   LOADING STATES
   ============================================ */

.btn.loading {
  pointer-events: none;
  opacity: 0.7;
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(26, 26, 46, 0.1);
  border-top-color: var(--color-black);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ============================================
   MOBILE MENU
   ============================================ */

.mobile-menu {
  transform: translateX(100%);
  transition: transform var(--anim-duration-normal) var(--ease-out);
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-backdrop {
  opacity: 0;
  transition: opacity var(--anim-duration-normal) ease;
  pointer-events: none;
}

.mobile-menu-backdrop.show {
  opacity: 1;
  pointer-events: all;
}

/* Staggered menu items */
.mobile-menu a {
  opacity: 0;
  transform: translateX(16px);
  transition: opacity var(--anim-duration-normal) ease,
              transform var(--anim-duration-normal) ease;
}

.mobile-menu.open a:nth-child(1) { transition-delay: 50ms; opacity: 1; transform: translateX(0); }
.mobile-menu.open a:nth-child(2) { transition-delay: 100ms; opacity: 1; transform: translateX(0); }
.mobile-menu.open a:nth-child(3) { transition-delay: 150ms; opacity: 1; transform: translateX(0); }
.mobile-menu.open a:nth-child(4) { transition-delay: 200ms; opacity: 1; transform: translateX(0); }
.mobile-menu.open a:nth-child(5) { transition-delay: 250ms; opacity: 1; transform: translateX(0); }
.mobile-menu.open a:nth-child(6) { transition-delay: 300ms; opacity: 1; transform: translateX(0); }
.mobile-menu.open a:nth-child(7) { transition-delay: 350ms; opacity: 1; transform: translateX(0); }

/* ============================================
   SCROLL PROGRESS INDICATOR
   ============================================ */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: linear-gradient(90deg,
    var(--color-gold-primary) 0%,
    var(--color-gold-light) 100%);
  z-index: 9999;
  transition: width 50ms linear;
}

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */

.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg,
    var(--color-gold-primary),
    var(--color-gold-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--anim-duration-normal) var(--ease-out);
  box-shadow: 0 4px 16px rgba(212, 175, 92, 0.25);
  z-index: 9998;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(212, 175, 92, 0.35);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  color: var(--color-black);
}

/* ============================================
   PAGE TRANSITIONS
   ============================================ */

body {
  animation: pageLoad var(--anim-duration-slow) ease-out;
}

@keyframes pageLoad {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* ============================================
   IMAGE HOVER EFFECTS
   ============================================ */

.case-study-image {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.case-study-image img {
  transition: transform var(--anim-duration-slow) ease;
}

.case-study-image:hover img {
  transform: scale(1.05);
}

/* ============================================
   BADGE PULSE
   ============================================ */

@keyframes badgePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.badge-dot {
  animation: badgePulse 2s ease-in-out infinite;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

.duration-fast { transition-duration: var(--anim-duration-fast); }
.duration-normal { transition-duration: var(--anim-duration-normal); }
.duration-slow { transition-duration: var(--anim-duration-slow); }

.hover-lift {
  transition: transform var(--anim-duration-fast) ease;
}

.hover-lift:hover {
  transform: translateY(-4px);
}

.fade-in {
  animation: fadeIn var(--anim-duration-slow) var(--ease-out);
}

/* ============================================
   ACCESSIBILITY - Reduced Motion
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
  }

  .stat-circle {
    animation: none;
  }

  .badge-dot {
    animation: none;
  }
}