/* ========================================================================
   Famly - Animace, keyframes, page transitions
   ======================================================================== */

/* === Keyframes === */

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

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

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

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

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

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes scaleOut {
  from { opacity: 1; transform: scale(1); }
  to   { opacity: 0; transform: scale(0.92); }
}

@keyframes sheetUp {
  from { opacity: 0; transform: translateY(100%); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes sheetDown {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(100%); }
}

@keyframes toastIn {
  0%   { opacity: 0; transform: translateY(-20px) scale(0.9); }
  60%  { opacity: 1; transform: translateY(2px) scale(1.02); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(-10px) scale(0.95); }
}

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

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  15% { transform: translateX(-6px); }
  30% { transform: translateX(6px); }
  45% { transform: translateX(-4px); }
  60% { transform: translateX(4px); }
  75% { transform: translateX(-2px); }
  90% { transform: translateX(2px); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.05); opacity: 0.85; }
}

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(124, 58, 237, 0.3); }
  50%      { box-shadow: 0 0 40px rgba(124, 58, 237, 0.6); }
}

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

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}

/* === Blob floating === */

@keyframes blobFloat1 {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(8vw, 6vh) scale(1.15); }
  66%  { transform: translate(-4vw, 10vh) scale(0.9); }
  100% { transform: translate(0, 0) scale(1); }
}

@keyframes blobFloat2 {
  0%   { transform: translate(0, 0) scale(1); }
  40%  { transform: translate(-6vw, -8vh) scale(1.1); }
  80%  { transform: translate(10vw, 4vh) scale(0.85); }
  100% { transform: translate(0, 0) scale(1); }
}

@keyframes blobFloat3 {
  0%   { transform: translate(0, 0) scale(1) rotate(0deg); }
  50%  { transform: translate(-10vw, 12vh) scale(1.2) rotate(20deg); }
  100% { transform: translate(0, 0) scale(1) rotate(0deg); }
}

/* === Page transitions === */

.page-enter {
  animation: pageEnter 350ms var(--ease-out);
  will-change: transform, opacity;
}

.page-exit {
  animation: pageExit 250ms var(--ease-out) forwards;
  will-change: transform, opacity;
}

@keyframes pageEnter {
  from { opacity: 0; transform: translateY(12px) scale(0.99); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes pageExit {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(-8px) scale(0.99); }
}

/* === Stagger animace === */

.stagger-children > * {
  opacity: 0;
  animation: staggerIn 400ms var(--ease-out) forwards;
}

@keyframes staggerIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.stagger-children > *:nth-child(1)  { animation-delay:  20ms; }
.stagger-children > *:nth-child(2)  { animation-delay:  60ms; }
.stagger-children > *:nth-child(3)  { animation-delay: 100ms; }
.stagger-children > *:nth-child(4)  { animation-delay: 140ms; }
.stagger-children > *:nth-child(5)  { animation-delay: 180ms; }
.stagger-children > *:nth-child(6)  { animation-delay: 220ms; }
.stagger-children > *:nth-child(7)  { animation-delay: 260ms; }
.stagger-children > *:nth-child(8)  { animation-delay: 300ms; }
.stagger-children > *:nth-child(9)  { animation-delay: 340ms; }
.stagger-children > *:nth-child(10) { animation-delay: 380ms; }
.stagger-children > *:nth-child(n+11) { animation-delay: 420ms; }

/* === Parallax === */

.parallax {
  will-change: transform;
  transition: transform 60ms linear;
}

/* === Ripple effect === */

.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  transform: scale(0);
  animation: rippleExpand 600ms var(--ease-out);
  pointer-events: none;
}

@keyframes rippleExpand {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

[data-theme="light"] .ripple { background: rgba(0, 0, 0, 0.1); }

/* === Tap feedback === */

.tappable {
  transition: transform var(--t-fast) var(--ease-spring);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.tappable:active { transform: scale(0.97); }

/* === Spinner loader === */

.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--glass-bg-strong);
  border-top-color: var(--brand-primary);
  border-radius: 50%;
  animation: spin 800ms linear infinite;
  display: inline-block;
}

.spinner-sm { width: 16px; height: 16px; border-width: 2px; }
.spinner-lg { width: 40px; height: 40px; border-width: 3px; }

/* === Pulse dot === */

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  position: relative;
}

.pulse-dot::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--color-success);
  opacity: 0.4;
  animation: pulse 1.6s ease-in-out infinite;
}

/* === Number counter === */

.counter {
  display: inline-block;
  font-variant-numeric: tabular-nums;
  transition: transform var(--t-base) var(--ease-spring);
}

.counter.changed {
  animation: counterPop 400ms var(--ease-spring);
}

@keyframes counterPop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.12); }
  100% { transform: scale(1); }
}

/* === Nav ikony === */

.nav-item .nav-icon {
  transition: transform var(--t-base) var(--ease-spring);
}

.nav-item.active .nav-icon {
  animation: navIconPop 500ms var(--ease-spring);
}

@keyframes navIconPop {
  0%   { transform: scale(1) translateY(0); }
  50%  { transform: scale(1.2) translateY(-2px); }
  100% { transform: scale(1) translateY(0); }
}

/* === Success checkmark === */

.checkmark {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: block;
  stroke-width: 3;
  stroke: var(--color-success);
  stroke-miterlimit: 10;
  box-shadow: inset 0 0 0 var(--color-success);
  animation: checkmarkFill 0.4s ease-in-out 0.4s forwards, checkmarkScale 0.3s ease-in-out 0.9s both;
}

.checkmark-circle {
  stroke-dasharray: 166;
  stroke-dashoffset: 166;
  stroke-width: 3;
  stroke-miterlimit: 10;
  stroke: var(--color-success);
  fill: none;
  animation: checkmarkStroke 0.6s var(--ease-out) forwards;
}

.checkmark-check {
  transform-origin: 50% 50%;
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
  animation: checkmarkStroke 0.3s var(--ease-out) 0.6s forwards;
}

@keyframes checkmarkStroke { to { stroke-dashoffset: 0; } }
@keyframes checkmarkScale  { 0%, 100% { transform: none; } 50% { transform: scale3d(1.1, 1.1, 1); } }
@keyframes checkmarkFill   { 100% { box-shadow: inset 0 0 0 30px rgba(16, 185, 129, 0.1); } }

/* === Tab indicator === */

.tab-indicator {
  position: absolute;
  bottom: 0;
  height: 3px;
  border-radius: var(--r-full);
  background: var(--brand-gradient);
  transition: left 350ms var(--ease-spring), width 350ms var(--ease-spring);
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.6);
}

/* === Card flip === */

.flip-card {
  perspective: 1000px;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 600ms var(--ease-spring);
  transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.flip-card-back { transform: rotateY(180deg); }

/* === Slide-in panely === */

.slide-panel {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  z-index: var(--z-modal);
  transform: translateX(100%);
  transition: transform 350ms var(--ease-out);
}

.slide-panel.open { transform: translateX(0); }

/* === GPU akcelerace === */

.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform;
  backface-visibility: hidden;
}

/* === Long-press feedback === */

@keyframes longPressGrow {
  from { transform: scale(1); }
  to   { transform: scale(0.95); }
}

.long-press-active { animation: longPressGrow 500ms var(--ease-out) forwards; }

/* === Confetti === */

@keyframes confettiFall {
  0%   { transform: translateY(-100vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.confetti-piece {
  position: fixed;
  width: 10px;
  height: 14px;
  top: 0;
  pointer-events: none;
  animation: confettiFall 2.5s linear forwards;
  z-index: var(--z-toast);
}

/* === Reduced motion === */

@media (prefers-reduced-motion: reduce) {
  .page-enter, .page-exit,
  .stagger-children > *,
  .toast, .modal-sheet,
  .skeleton {
    animation: fadeIn 200ms var(--ease-out) !important;
  }

  .bg-blobs::before,
  .bg-blobs::after,
  .bg-blobs .blob,
  .pulse-dot::before,
  .spinner {
    animation: none !important;
  }
}