/**
 * animations.css
 * Subtle, professional motion layer for BizTrack. Loaded after
 * style.css so it can add entrance/hover motion without touching
 * the base styles. Reuses the existing --transition variable where
 * it makes sense, and adds its own easing for larger entrance moves.
 */

:root {
  --anim-ease: cubic-bezier(0.16, 1, 0.3, 1);
  --anim-duration: 0.55s;
  --page-exit-duration: 160ms;
}

/* Respect users who've asked for reduced motion. */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Whole-page settle-in / leave (driven by animate.js nav intercept) ---------- */

body {
  animation: btai-page-in 0.35s ease both;
}

@keyframes btai-page-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Applied just before we navigate to a new internal page, so the
   swap reads as a transition instead of a hard cut. Removed again
   on pageshow (see animate.js) in case the page is restored from
   the back/forward cache with the class still attached. */
body.is-leaving {
  animation: btai-page-out var(--page-exit-duration) ease forwards;
  pointer-events: none;
}

@keyframes btai-page-out {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* ---------- Scroll/entrance reveal (driven by animate.js) ---------- */

.anim-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--anim-duration) var(--anim-ease),
              transform var(--anim-duration) var(--anim-ease);
  will-change: opacity, transform;
}

.anim-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Card & interactive hover lift ---------- */

.card,
.feature-card,
.step-card,
.stat-card {
  transition: transform 220ms var(--anim-ease), box-shadow 220ms var(--anim-ease),
              background-color 400ms ease, border-color 400ms ease;
}

.feature-card:hover,
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-modal, 0 12px 28px rgba(0,0,0,0.12));
}

.stat-card:hover {
  transform: translateY(-2px);
}

/* Nav links: smooth background/left-accent feel on hover + active */
.sidebar-nav a {
  transition: background var(--transition, 160ms ease), color var(--transition, 160ms ease), transform 160ms var(--anim-ease);
}

.sidebar-nav a:hover {
  transform: translateX(2px);
}

/* Transaction/breakdown list rows: gentle stagger + hover highlight */
#recent-txn-list > *,
#full-txn-list > *,
#income-breakdown-list > *,
#expense-breakdown-list > * {
  transition: background 160ms ease, transform 160ms var(--anim-ease);
}

#recent-txn-list > *:hover,
#full-txn-list > *:hover {
  transform: translateX(2px);
}

/* ---------- Landing page hero ---------- */

.hero-preview {
  animation: btai-float 5s ease-in-out infinite;
}

@keyframes btai-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

.landing-header .brand-mark,
.sidebar-brand-mark {
  transition: transform 220ms var(--anim-ease);
}

.landing-header .brand:hover .brand-mark {
  transform: rotate(-4deg) scale(1.04);
}

/* ---------- Chat assistant FAB ---------- */

#biztrack-assistant-fab {
  animation: btai-fab-in 0.4s var(--anim-ease) both;
}

@keyframes btai-fab-in {
  from { opacity: 0; transform: scale(0.6); }
  to { opacity: 1; transform: scale(1); }
}

#biztrack-assistant-panel {
  transform: translateY(12px) scale(0.98);
  opacity: 0;
  transition: transform 220ms var(--anim-ease), opacity 220ms var(--anim-ease);
  pointer-events: none;
}

#biztrack-assistant-panel.is-open {
  transform: translateY(0) scale(1);
  opacity: 1;
  pointer-events: auto;
}

/* Chat bubbles ease in as they're added */
.btai-msg {
  animation: btai-msg-in 220ms var(--anim-ease) both;
}

@keyframes btai-msg-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Waving hand on the assistant's opening greeting */
.btai-wave-emoji {
  display: inline-block;
  transform-origin: 70% 70%;
  animation: btai-wave 1.6s ease-in-out 1;
}

@keyframes btai-wave {
  0% { transform: rotate(0deg); }
  10% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  30% { transform: rotate(14deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(10deg); }
  60%, 100% { transform: rotate(0deg); }
}

/* ---------- Stat value count-up target (JS toggles this while animating) ---------- */

.anim-counting {
  font-variant-numeric: tabular-nums;
}

/* ==========================================================
   Button micro-interactions
   ========================================================== */

.btn {
  transition: transform 180ms var(--anim-ease), background var(--transition, 160ms ease),
              box-shadow 180ms var(--anim-ease), opacity 180ms var(--anim-ease);
}

.btn-primary:hover,
.btn-danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(18, 61, 43, 0.18);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 14px rgba(18, 61, 43, 0.08);
}

.btn:active {
  transform: translateY(0) scale(0.97);
  box-shadow: none;
}

.icon-btn,
.chip,
.category-option,
.type-toggle-btn,
.business-type-option {
  transition: all 160ms var(--anim-ease);
}

.icon-btn:active,
.chip:active,
.category-option:active,
.type-toggle-btn:active,
.business-type-option:active {
  transform: scale(0.95);
}

/* Opt-in loading state — toggle with setButtonLoading(btn, true/false)
   from app.js on any form submit button. */
.btn.is-loading {
  color: transparent !important;
  pointer-events: none;
  position: relative;
}

.btn.is-loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  animation: btai-spin 0.65s linear infinite;
}

.btn-secondary.is-loading::after,
.btn-ghost.is-loading::after {
  border-color: rgba(27, 94, 66, 0.25);
  border-top-color: var(--color-primary);
}

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

/* ==========================================================
   Chart / bar draw-in (dashboard income-vs-expense bar +
   reports category breakdown bars). The width itself is set by
   dashboard.js / reports.js as usual — this just makes any width
   change animate instead of snapping.
   ========================================================== */

.dashboard-flow-bar-income,
.dashboard-flow-bar-expense {
  transition: width 700ms var(--anim-ease);
}

.breakdown-row .breakdown-bar-fill {
  width: 0%;
  transition: width 700ms var(--anim-ease);
}

/* ==========================================================
   Modal — smooth scale + fade
   ========================================================== */

.modal-overlay {
  transition: opacity 220ms var(--anim-ease);
}

.modal-box {
  opacity: 0;
  transform: translateY(10px) scale(0.96);
  transition: transform 260ms var(--anim-ease), opacity 220ms var(--anim-ease);
}

.modal-overlay.is-open .modal-box {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* ==========================================================
   Mobile bottom nav — slide up on first paint, since it takes
   the sidebar's place as primary nav on small screens.
   ========================================================== */

@media (max-width: 900px) {
  .mobile-nav {
    animation: btai-mobilenav-in 320ms var(--anim-ease) both;
  }

  @keyframes btai-mobilenav-in {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
  }
}

/* ==========================================================
   Toasts — slide + settle in, matched to the removal delay in
   showToast() (app.js) so the exit isn't cut short.
   ========================================================== */

.toast {
  transform: translateY(16px) scale(0.97);
  transition: transform 320ms var(--anim-ease), opacity 320ms var(--anim-ease);
}

.toast.is-visible {
  transform: translateY(0) scale(1);
}

/* ==========================================================
   Skeleton loading — pair with showSkeleton()/clearSkeleton()
   in app.js. Drop a container's id/selector into showSkeleton()
   before a slow render, e.g. showSkeleton(listEl, 4).
   ========================================================== */

.skeleton {
  display: block;
  background: linear-gradient(90deg, var(--color-border) 25%, var(--color-bg) 37%, var(--color-border) 63%);
  background-size: 400% 100%;
  border-radius: var(--radius-sm);
  animation: btai-shimmer 1.4s ease infinite;
}

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

.skeleton-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 4px;
}

.skeleton-circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-text {
  height: 14px;
  flex: 1;
  border-radius: 4px;
}

.skeleton-text--sm {
  flex: none;
  width: 60px;
}

.skeleton-block {
  height: 100%;
  min-height: 120px;
  width: 100%;
  border-radius: var(--radius-md);
}

/* ==========================================================
   Empty states — fade/settle in whenever a page-specific
   script flips them to display:block/flex (a CSS animation
   restarts on display change, no JS hook needed).
   ========================================================== */

.empty-state {
  animation: btai-empty-in 450ms var(--anim-ease) both;
}

@keyframes btai-empty-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.empty-state-icon {
  animation: btai-float 4.5s ease-in-out infinite;
}

.auth-error-banner.is-visible {
  animation: btai-empty-in 320ms var(--anim-ease) both;
}

/* ==========================================================
   Theme switch — smooth handoff between light/dark rather
   than an instant snap. Broad but scoped to color properties
   only, so layout/animation transitions above are untouched.
   ========================================================== */

.sidebar,
.modal-box,
.modal-overlay,
.form-input,
.form-select,
.toast,
.stat-icon,
.txn-icon,
.dashboard-flow-stat,
.settings-logo-preview,
.mobile-nav,
.auth-error-banner {
  transition: background-color 400ms ease, color 400ms ease, border-color 400ms ease, box-shadow 400ms ease;
}

/* ==========================================================
   Ambient background — two very soft, slow-drifting blurred
   blobs behind the app shell. Uses the existing light theme
   tint tokens so it stays subtle in both light and dark mode,
   and freezes (via the prefers-reduced-motion rule up top)
   for anyone who's asked for less motion.
   ========================================================== */

body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
  pointer-events: none;
  z-index: -1;
  will-change: transform;
}

body::before {
  width: 420px;
  height: 420px;
  top: -120px;
  right: -100px;
  background: radial-gradient(circle, var(--color-primary-light), transparent 70%);
  animation: btai-blob-a 22s ease-in-out infinite;
}

body::after {
  width: 380px;
  height: 380px;
  bottom: -140px;
  left: -80px;
  background: radial-gradient(circle, var(--color-profit-bg), transparent 70%);
  animation: btai-blob-b 26s ease-in-out infinite;
}

@keyframes btai-blob-a {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 40px) scale(1.08); }
}

@keyframes btai-blob-b {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.05); }
}