/* ============================================================
   HOUSTON MEDICAL CENTER DENTAL — Animations
   Designed & Developed by Novelio Technologies 2026
   ============================================================ */

/* ── Keyframes ── */
@keyframes float-shape {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.6; }
  50%       { transform: translateY(-30px) scale(1.05); opacity: 0.9; }
}

@keyframes float-tooth {
  0%, 100% { transform: translateY(-50%) translateX(0); }
  50%       { transform: translateY(calc(-50% - 14px)) translateX(4px); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes scale-in {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

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

@keyframes pulse-ring {
  0%   { transform: translate(-50%, -50%) scale(0.8); opacity: 1; }
  80%  { transform: translate(-50%, -50%) scale(2.2); opacity: 0; }
  100% { transform: translate(-50%, -50%) scale(2.2); opacity: 0; }
}

@keyframes bounce-in {
  0%   { transform: translateY(20px); opacity: 0; }
  60%  { transform: translateY(-8px); opacity: 1; }
  80%  { transform: translateY(4px); }
  100% { transform: translateY(0); }
}

@keyframes typewriter-cursor {
  0%, 100% { border-right-color: var(--gold); }
  50%       { border-right-color: transparent; }
}

@keyframes star-fill {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0% 0 0); }
}

@keyframes ken-burns {
  0%   { transform: scale(1.06); }
  100% { transform: scale(1); }
}

@keyframes counter-shake {
  0%, 100% { transform: translateX(0); }
  20%  { transform: translateX(-4px); }
  40%  { transform: translateX(4px); }
  60%  { transform: translateX(-2px); }
  80%  { transform: translateX(2px); }
}

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

@keyframes ripple {
  0%   { transform: scale(0); opacity: 0.6; }
  100% { transform: scale(4); opacity: 0; }
}

@keyframes slide-up-mobile {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

@keyframes particle-float {
  0%   { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10%  { opacity: 0.5; }
  90%  { opacity: 0.3; }
  100% { transform: translateY(-10vh) rotate(720deg); opacity: 0; }
}

/* ── Hero Ken Burns ── */
.hero-bg { animation: ken-burns 12s ease-out forwards; }

/* ── Hero entrance animations ── */
.hero-eyebrow { animation: fadeDown 0.7s ease-out both; animation-delay: 0.2s; }
.hero h1      { animation: fadeUp 0.8s ease-out both; animation-delay: 0.5s; }
.hero-sub     { animation: fadeUp 0.8s ease-out both; animation-delay: 0.8s; }
.hero-actions { animation: fadeUp 0.8s ease-out both; animation-delay: 1.1s; }
.hero-badges  { animation: fadeUp 0.8s ease-out both; animation-delay: 1.4s; }

/* ── Scroll-triggered: default hidden state ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

.reveal-left {
  opacity: 0;
  transform: translateX(-48px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }

.reveal-right {
  opacity: 0;
  transform: translateX(48px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal-right.visible { opacity: 1; transform: translateX(0); }

.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal-scale.visible { opacity: 1; transform: scale(1); }

/* Stagger delays */
.delay-1 { transition-delay: 0.1s !important; }
.delay-2 { transition-delay: 0.2s !important; }
.delay-3 { transition-delay: 0.3s !important; }
.delay-4 { transition-delay: 0.4s !important; }
.delay-5 { transition-delay: 0.5s !important; }
.delay-6 { transition-delay: 0.6s !important; }

/* ── Typewriter effect ── */
.typewriter {
  display: inline;
  border-right: 3px solid var(--gold);
  animation: typewriter-cursor 0.75s step-end infinite;
  padding-right: 3px;
}

/* ── Shimmer loading skeleton ── */
.shimmer {
  background: linear-gradient(90deg, #f0f4f8 25%, #e2ecf5 50%, #f0f4f8 75%);
  background-size: 200% auto;
  animation: shimmer 1.5s linear infinite;
  border-radius: var(--radius-sm);
}

/* ── Particles ── */
.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  animation: particle-float linear infinite;
  pointer-events: none;
}

/* ── Button ripple effect ── */
.btn .ripple-effect {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  animation: ripple 0.6s ease-out;
  pointer-events: none;
}

/* ── Stats fill animation ── */
.stat-number.counting { animation: counter-shake 0.2s ease-in-out; }

/* ── Star animate on scroll ── */
.review-stars.animate i {
  animation: star-fill 0.4s ease-out both;
}
.review-stars.animate i:nth-child(1) { animation-delay: 0.1s; }
.review-stars.animate i:nth-child(2) { animation-delay: 0.2s; }
.review-stars.animate i:nth-child(3) { animation-delay: 0.3s; }
.review-stars.animate i:nth-child(4) { animation-delay: 0.4s; }
.review-stars.animate i:nth-child(5) { animation-delay: 0.5s; }

/* ── Mobile sticky bar entrance ── */
.sticky-mobile-bar { animation: slide-up-mobile 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both; animation-delay: 1.5s; }

/* ── Nav link underline slide ── */
@keyframes nav-underline-in {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* ── Gallery item hover ── */
.gallery-item {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.gallery-item:hover { transform: scale(1.02); box-shadow: 0 12px 40px rgba(0,0,0,0.25); }

/* ── Accordion ── */
.faq-answer {
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1),
              padding 0.3s ease;
}

/* ── Dropdown slide ── */
.dropdown {
  transform-origin: top center;
}

/* ── Review card tilt ── */
.review-card {
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.35s ease;
}

/* ── Pulse ring for call button ── */
@keyframes pulse-out {
  0%   { box-shadow: 0 0 0 0 rgba(255,255,255,0.4); }
  70%  { box-shadow: 0 0 0 14px rgba(255,255,255,0); }
  100% { box-shadow: 0 0 0 0 rgba(255,255,255,0); }
}
.sticky-mobile-bar .call-btn { animation: pulse-out 2s ease-out infinite; animation-delay: 2s; }

/* ── Image zoom on scroll into view ── */
.img-zoom {
  overflow: hidden;
}
.img-zoom img {
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}
.img-zoom.visible img { transform: scale(1) !important; }

/* ── Service card accent line ── */
.service-card::before {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Floating doctor image overlay ── */
.doctor-image-overlay {
  transition: opacity 0.4s ease;
}

/* ── Form field focus ring pulse ── */
@keyframes focus-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(10,76,138,0.2); }
  70%  { box-shadow: 0 0 0 8px rgba(10,76,138,0); }
  100% { box-shadow: 0 0 0 0 rgba(10,76,138,0); }
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  animation: focus-pulse 1s ease-out;
}

/* ── Page transition overlay ── */
.page-transition {
  position: fixed;
  inset: 0;
  background: var(--primary);
  z-index: 9999;
  transform: translateY(100%);
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.page-transition.entering { transform: translateY(0); }
.page-transition.exiting  { transform: translateY(-100%); }

/* ── Error shake ── */
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  15%  { transform: translateX(-8px); }
  30%  { transform: translateX(8px); }
  45%  { transform: translateX(-6px); }
  60%  { transform: translateX(6px); }
  75%  { transform: translateX(-3px); }
  90%  { transform: translateX(3px); }
}
.form-group.error { animation: shake 0.5s ease-out; }

/* ── Success checkmark ── */
@keyframes draw-check {
  from { stroke-dashoffset: 60; }
  to   { stroke-dashoffset: 0; }
}
.check-svg path {
  stroke-dasharray: 60;
  stroke-dashoffset: 60;
  animation: draw-check 0.6s ease-out 0.3s forwards;
}

/* ── Tooltip ── */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(6px);
  background: var(--dark);
  color: white;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: all 0.25s ease;
  z-index: 10;
}
[data-tooltip]:hover::after { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Scroll progress bar ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  z-index: 9999;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.1s linear;
}

/* ── Back to top ── */
.back-to-top {
  position: fixed;
  bottom: 80px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  box-shadow: var(--shadow-lg);
  z-index: 980;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { background: var(--gold); color: var(--dark); transform: translateY(-4px); }