/* =============================================================
   animations.css — Animation System
   Lawyer Office App — Design System v1.0
   Includes: page transitions, skeleton shimmer, micro-interactions,
             spinners, fade/scale effects.
   Requires: variables.css loaded first.
   ============================================================= */

/* ── 1. Keyframe Definitions ──────────────────────────────── */

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px) scale(.99); }
  to   { opacity: 1; transform: translateY(0)   scale(1);   }
}

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

@keyframes rise {
  from { opacity: 0; transform: translateY(12px) scale(.98); }
  to   { opacity: 1; transform: translateY(0)    scale(1);   }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(.95); }
  to   { opacity: 1; transform: scale(1);   }
}

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

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 0 0   rgba(13,107,90,.18); }
  50%       { box-shadow: 0 0 0 8px rgba(13,107,90,.06); }
}

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

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

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

/* ── 2. Animation Utility Classes ─────────────────────────── */

.animate-fadeUp     { animation: fadeUp      .35s var(--transition-base)   both; }
.animate-fadeIn     { animation: fadeIn      .28s var(--transition-fast)   both; }
.animate-rise       { animation: rise        .45s var(--transition-smooth) both; }
.animate-scaleIn    { animation: scaleIn     .3s  var(--transition-base)   both; }
.animate-pulseGlow  { animation: pulseGlow   2.2s ease-in-out infinite; }
.animate-spin       { animation: spin        .75s linear infinite; }
.animate-slideDown  { animation: slideInDown .3s  var(--transition-base)   both; }
.animate-slideUp    { animation: slideInUp   .3s  var(--transition-base)   both; }

/* Stagger helpers */
.anim-delay-1 { animation-delay: 60ms; }
.anim-delay-2 { animation-delay: 120ms; }
.anim-delay-3 { animation-delay: 180ms; }
.anim-delay-4 { animation-delay: 240ms; }

/* ── 3. Page Transition ────────────────────────────────────── */

.page-content {
  animation: fadeUp .4s var(--transition-smooth) both;
}

/* View Transitions API (progressive enhancement) */
@supports (view-transition-name: root) {
  html { view-transition-name: root; }

  ::view-transition-old(root) {
    animation: fadeIn .2s ease reverse;
  }
  ::view-transition-new(root) {
    animation: rise   .35s ease both;
  }
}

/* ── 4. Skeleton Loader ────────────────────────────────────── */

/* Base skeleton style */
.skeleton {
  display: block;
  border-radius: var(--radius-sm);
  background: linear-gradient(
    90deg,
    var(--color-surface-soft) 0%,
    var(--color-border)       40%,
    var(--color-surface-soft) 100%
  );
  background-size: 200% 100%;
  animation: shimmer var(--skeleton-duration) ease infinite;
  color: transparent !important;
  pointer-events: none;
  user-select: none;
}

/* Skeleton shape helpers */
.skeleton-text   { height: 1em;    border-radius: var(--radius-xs); margin-block: .3em; }
.skeleton-title  { height: 1.5em;  border-radius: var(--radius-xs); width: 60%; }
.skeleton-circle { border-radius: var(--radius-full) !important; }
.skeleton-btn    { height: 2.25rem; width: 8rem; border-radius: var(--radius-sm); }
.skeleton-img    { aspect-ratio: 16/9; border-radius: var(--radius-md); }

/* ── KPI card skeleton ── */
.skeleton-kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  box-shadow: var(--shadow-xs);
}
.skeleton-kpi-card .skeleton-label {
  height: .75rem;
  width: 55%;
  margin-bottom: var(--space-3);
}
.skeleton-kpi-card .skeleton-value {
  height: 1.75rem;
  width: 45%;
}

/* ── Table skeleton ── */
.skeleton-table-row {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}
.skeleton-table-row .skeleton-cell {
  height: 1rem;
  flex: 1;
  border-radius: var(--radius-xs);
}
.skeleton-table-row .skeleton-cell:first-child { flex: 2; }

/* Dark mode skeleton */
html.dark-mode .skeleton,
[data-theme="dark"] .skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-soft) 0%,
    var(--color-border)        40%,
    var(--color-surface-soft)  100%
  );
  background-size: 200% 100%;
  animation: shimmer var(--skeleton-duration) ease infinite;
}

/* ── 5. Micro-Interactions ─────────────────────────────────── */

/* ── Buttons ── */
.btn,
[class^="btn-"],
[class*=" btn-"] {
  transition:
    transform        var(--transition-fast),
    box-shadow       var(--transition-fast),
    background-color var(--transition-base),
    border-color     var(--transition-base),
    color            var(--transition-base);
}

.btn:hover,
[class^="btn-"]:hover,
[class*=" btn-"]:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn:active,
[class^="btn-"]:active,
[class*=" btn-"]:active {
  transform: translateY(0) scale(.98);
  box-shadow: none;
}

/* Loading state on button */
.btn.loading,
.btn[data-loading="true"] {
  pointer-events: none;
  opacity: .75;
  position: relative;
}
.btn.loading::after,
.btn[data-loading="true"]::after {
  content: '';
  display: inline-block;
  width: .9em;
  height: .9em;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: var(--radius-full);
  animation: spin .6s linear infinite;
  margin-inline-start: .5em;
  vertical-align: middle;
}

/* ── Input / Form Controls ── */
.form-control,
.form-select,
.form-input {
  transition:
    border-color var(--transition-base),
    box-shadow   var(--transition-base);
}

.form-control:focus,
.form-select:focus,
.form-input:focus {
  border-color: var(--color-primary) !important;
  box-shadow: var(--shadow-focus) !important;
  outline: none;
}

/* ── Cards ── */
.card,
.app-card {
  transition:
    transform   var(--transition-base),
    box-shadow  var(--transition-base);
}

.card.hoverable:hover,
.app-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md) !important;
}

/* ── Links & Nav Items ── */
a,
.nav-link {
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

/* ── 6. Spinner Component ─────────────────────────────────── */

.spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: var(--radius-full);
  animation: spin .65s linear infinite;
  vertical-align: middle;
}

.spinner-sm { width: .9rem;  height: .9rem; }
.spinner-lg { width: 2rem;   height: 2rem;  border-width: 3px; }

/* ── 7. Overlay / Full-Page Loader ────────────────────────── */

.page-loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg, #f6f7f6);
  opacity: .92;
  backdrop-filter: blur(4px);
  animation: fadeIn .2s ease;
}

.page-loader.hidden {
  display: none;
}

/* ── 8. Toast Notifications ───────────────────────────────── */

#toast-container {
  position: fixed;
  inset-block-end: var(--space-6);
  inset-inline-end: var(--space-4);
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
  max-width: min(360px, calc(100vw - 2rem));
}

.toast-msg {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: #fff;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  box-shadow: var(--shadow-md);
  pointer-events: auto;
  animation: slideInUp .3s var(--transition-base) both;
  cursor: pointer;
  line-height: var(--line-height-normal);
}

.toast-msg.toast-success { background: var(--toast-success-bg); }
.toast-msg.toast-error   { background: var(--toast-error-bg);   }
.toast-msg.toast-warning { background: var(--toast-warning-bg); }
.toast-msg.toast-info    { background: var(--toast-info-bg);    }

.toast-msg.hiding {
  animation: fadeIn .25s ease reverse both;
}

.toast-icon {
  font-size: var(--font-size-base);
  flex-shrink: 0;
  margin-block-start: .1em;
}

.toast-body { flex: 1; word-break: break-word; }

/* ── 9. Inline Feedback ────────────────────────────────────── */

.field-feedback {
  font-size: var(--font-size-xs);
  margin-block-start: var(--space-1);
  animation: fadeIn .2s ease;
}
.field-feedback.error   { color: var(--color-danger);  }
.field-feedback.success { color: var(--color-success); }
.field-feedback.warning { color: var(--color-warning); }

/* ── Scroll-triggered reveal ──────────────────────────── */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .4s var(--transition-smooth), transform .4s var(--transition-smooth);
}
.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Accessibility: Reduce Motion ──────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .skeleton {
    animation: none !important;
    background: var(--color-surface-soft) !important;
  }
}