/* ===================================================
   PULSE CHAT — Animations (Telegram-like)
   =================================================== */

/* ── Message appear ── */
@keyframes msgIn {
  from { opacity: 0; transform: translateY(8px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Fade up (landing, modals) ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Scale in (context menu, dropdowns) ── */
@keyframes fadeScale {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

/* ── Slide down (search bar) ── */
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Landing orbs ── */
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.1); }
  66% { transform: translate(-20px, 40px) scale(0.95); }
}

/* ── Spinner ── */
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Pulse glow ── */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ── Typing dots ── */
@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-4px); }
}

/* ── Page slide transitions (TG-style) ── */
@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0.5; }
  to { transform: translateX(0); opacity: 1; }
}
@keyframes slideOutRight {
  from { transform: translateX(0); opacity: 1; }
  to { transform: translateX(100%); opacity: 0.5; }
}
@keyframes slideInLeft {
  from { transform: translateX(-30%); opacity: 0.3; }
  to { transform: translateX(0); opacity: 1; }
}

/* ── Ripple effect (for buttons/list items) ── */
@keyframes ripple {
  to { transform: scale(4); opacity: 0; }
}

/* ── Notification pop ── */
@keyframes notifPop {
  0% { transform: scale(0); opacity: 0; }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); opacity: 1; }
}

/* ── Badge count change ── */
@keyframes badgePop {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); }
  100% { transform: scale(1); }
}

/* ── Smooth scroll indicator ── */
@keyframes scrollFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ══════════════════════════════════
   Apply to elements
   ══════════════════════════════════ */

/* Pages transition smoothly */
.page {
  animation-duration: var(--dur-250);
  animation-fill-mode: both;
  animation-timing-function: var(--easing-standard);
}
.page.active {
  animation-name: slideInLeft;
}

/* Chat items have subtle hover */
.chat-item {
  transition: background-color var(--dur-150) var(--easing-standard), transform var(--dur-100) var(--easing-standard);
}
.chat-item:active {
  transform: scale(calc(1 - (0.02 * var(--motion-level))));
}

/* Buttons press effect */
.btn-primary:active,
.btn-outline:active,
.auth-submit:active,
.fab:active {
  transform: scale(calc(1 - (0.05 * var(--motion-level))));
  transition: transform var(--dur-100) var(--easing-standard);
}

/* Badge animation on update */
.badge {
  animation: badgePop var(--dur-300) var(--easing-standard);
}

/* Smooth transitions on theme change */
.sidebar, .chat-view, .chat-header, .input-area, .slide-menu, .msg-bubble {
  transition: background-color var(--dur-300) var(--easing-standard), border-color var(--dur-300) var(--easing-standard), color var(--dur-200) var(--easing-standard);
}

/* Message bubbles */
.msg-row {
  animation: msgIn var(--dur-200) var(--easing-standard) both;
}

/* Context menu / reaction picker */
.context-menu, .reaction-picker, .admin-actions-dropdown {
  animation: fadeScale var(--dur-150) var(--easing-standard) both;
}

/* Modal backdrop */
.modal.active {
  animation: fadeUp var(--dur-200) var(--easing-standard) both;
}

/* Topic cards hover */
.topic-card {
  transition: background-color var(--dur-150) var(--easing-standard), border-color var(--dur-150) var(--easing-standard), transform var(--dur-150) var(--easing-standard);
}
.topic-card:active {
  transform: scale(calc(1 - (0.02 * var(--motion-level))));
}

/* Slide menu */
.slide-menu {
  transition: transform var(--dur-300) var(--easing-standard);
}

/* ══════════════════════════════════
   Telegram Web — keyframes из tweb-master
   ══════════════════════════════════ */

/* Выбор пузыря — из _chatBubble.scss */
@keyframes bubbleSelected {
  0%  { opacity: 0; }
  25% { opacity: 1; }
  to  { opacity: 0; }
}

/* Ripple из tweb */
@keyframes rippleTG {
  0%   { transform: scale(0); opacity: var(--hover-alpha); }
  100% { transform: scale(4); opacity: 0; }
}

/* Preloader blur-in — из _preloader.scss */
@keyframes preloaderIn {
  from { opacity: 0; backdrop-filter: blur(0px) brightness(1.0); }
  to   { opacity: 1; backdrop-filter: blur(10px) brightness(0.8); }
}

/* Popup/modal — деcелерация как в TG */
@keyframes popupIn {
  from { opacity: 0; transform: scale(0.94) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes popupOut {
  from { opacity: 1; transform: scale(1) translateY(0); }
  to   { opacity: 0; transform: scale(0.94) translateY(8px); }
}

/* Contextual menu — из btn-menu в tweb */
@keyframes menuIn {
  from { opacity: 0; transform: scale(0.88) translateY(-4px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* Avatar sticky bounce */
@keyframes avatarBounce {
  0%   { transform: translateY(0); }
  30%  { transform: translateY(-3px); }
  100% { transform: translateY(0); }
}

/* Typing indicator dots (точно как в TG) */
@keyframes typingDot {
  0%, 60%, 100% { transform: translateY(0); opacity: .6; }
  30%           { transform: translateY(-5px); opacity: 1; }
}

/* Glass shimmer (для skeleton-загрузки) */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* ══════════════════════════════════
   Apply — glass + точные transition
   ══════════════════════════════════ */

/* Glassmorphism popup */
.modal-content,
.context-menu,
.reaction-picker,
.admin-actions-dropdown,
.tooltip {
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  background: var(--glass-bg-menu);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.modal.active .modal-content {
  animation: popupIn var(--transition-decelerate) both;
}

/* Context menu */
.context-menu,
.admin-actions-dropdown {
  animation: menuIn var(--transition-standard-in) both;
}

/* Header glass при скролле */
.sidebar-header.scrolled,
.chat-header.scrolled {
  -webkit-backdrop-filter: var(--glass-blur-sm);
  backdrop-filter: var(--glass-blur-sm);
  background: var(--glass-bg);
  border-bottom: 1px solid var(--glass-border);
}

/* Menu overlay frosted glass */
.menu-overlay {
  -webkit-backdrop-filter: blur(6px) brightness(0.6) saturate(0.8);
  backdrop-filter: blur(6px) brightness(0.6) saturate(0.8);
}

/* Ripple элемент */
.ripple-el {
  position: absolute;
  border-radius: 50%;
  background: currentColor;
  opacity: var(--hover-alpha);
  pointer-events: none;
  animation: rippleTG var(--ripple-duration) linear forwards;
}

/* Typing dots */
.typing-dot {
  animation: typingDot 1.2s ease-in-out infinite;
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

/* Skeleton shimmer */
.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-2) 0%,
    var(--bg-3) 50%,
    var(--bg-2) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* Admin panel */
.admin-panel-overlay {
  transition: transform var(--dur-300) var(--easing-standard);
}

/* Info panel */
.info-panel-overlay {
  transition: transform var(--dur-300) var(--easing-standard);
}

/* Scroll to bottom button */
.scroll-to-bottom {
  transition: opacity var(--dur-200) var(--easing-standard), transform var(--dur-200) var(--easing-standard);
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --motion-level: 0;
    --dur-100: 0.01ms;
    --dur-150: 0.01ms;
    --dur-200: 0.01ms;
    --dur-250: 0.01ms;
    --dur-300: 0.01ms;
    --dur-400: 0.01ms;
  }
}