/* =====================================================================
   SACS Freight OS — Motion & Interaction Layer
   Version: 1.0
   Purpose: Micro-interactions, transitions and entrance choreography.
            Loaded LAST so it can refine the base component styles.

   Design contract:
   - Nothing here changes layout, colour semantics or spacing.
   - Every animation is short (120–320ms) and interruptible.
   - Entrance choreography is opt-in via `.is-entering`, set by
     js/motion.js only on section / selection changes — never on the
     live socket re-renders, which would otherwise flicker constantly.
   ===================================================================== */

:root {
  /* Motion-specific easings layered on top of tokens.css */
  /* The overshoot curve was removed in Phase 52: bounce/elastic easing is banned
     by DESIGN.md and by Emil's animation framework. Use --ease-out instead. */
  --ease-swift:   cubic-bezier(0.22, 1, 0.36, 1);      /* fast out, soft land */
  --duration-xfast: 110ms;
  --stagger-step:   26ms;
}

/* =====================================================================
   1. KEYFRAMES
   ===================================================================== */

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

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

@keyframes sacs-overlay-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes sacs-overlay-out {
  from { opacity: 1; }
  to   { opacity: 0; }
}

@keyframes sacs-modal-in {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes sacs-modal-out {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(8px) scale(0.98); }
}

@keyframes sacs-toast-slide-in {
  from { opacity: 0; transform: translateY(14px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes sacs-toast-slide-out {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(8px) scale(0.98); }
}

@keyframes sacs-ripple-out {
  from { transform: scale(0);   opacity: 0.32; }
  to   { transform: scale(2.6); opacity: 0; }
}

@keyframes sacs-badge-pop {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.35); }
  100% { transform: scale(1); }
}

@keyframes sacs-bar-grow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(var(--fill, 1)); }
}

@keyframes sacs-drawer-in {
  from { opacity: 0; transform: translateY(-8px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes sacs-panel-slide-in {
  from { opacity: 0; transform: translateX(24px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes sacs-dot-breathe {
  0%, 100% { box-shadow: 0 0 0 0 currentColor; opacity: 1; }
  50%      { box-shadow: 0 0 0 4px transparent; opacity: 0.75; }
}

/* =====================================================================
   2. SECTION / SELECTION ENTRANCE CHOREOGRAPHY
   Driven by `.is-entering` on .sacs-layout (see js/motion.js).
   ===================================================================== */

.sacs-layout.is-entering .sacs-main,
.sacs-layout.is-entering .sacs-focus-wrap > .sacs-main {
  animation: sacs-panel-in 260ms var(--ease-swift) both;
}

/* Staggered list reveal — sidebar cards, focus tables, KPI grids.
   Capped at 14 items so long lists never feel slow. */
.sacs-layout.is-entering .sacs-sidebar__list > *,
.sacs-layout.is-entering .sacs-kpi-grid > *,
.sacs-layout.is-entering .sacs-table tbody > tr,
.sacs-layout.is-entering .sacs-main > .sacs-section {
  animation: sacs-row-in 240ms var(--ease-swift) both;
}

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(1),
.sacs-layout.is-entering .sacs-kpi-grid > *:nth-child(1),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(1),
.sacs-layout.is-entering .sacs-main > .sacs-section:nth-child(1)  { animation-delay: 0ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(2),
.sacs-layout.is-entering .sacs-kpi-grid > *:nth-child(2),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(2),
.sacs-layout.is-entering .sacs-main > .sacs-section:nth-child(2)  { animation-delay: 26ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(3),
.sacs-layout.is-entering .sacs-kpi-grid > *:nth-child(3),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(3),
.sacs-layout.is-entering .sacs-main > .sacs-section:nth-child(3)  { animation-delay: 52ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(4),
.sacs-layout.is-entering .sacs-kpi-grid > *:nth-child(4),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(4),
.sacs-layout.is-entering .sacs-main > .sacs-section:nth-child(4)  { animation-delay: 78ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(5),
.sacs-layout.is-entering .sacs-kpi-grid > *:nth-child(5),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(5)      { animation-delay: 104ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(6),
.sacs-layout.is-entering .sacs-kpi-grid > *:nth-child(6),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(6)      { animation-delay: 130ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(7),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(7)      { animation-delay: 152ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(8),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(8)      { animation-delay: 170ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(9),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(9)      { animation-delay: 186ms; }

.sacs-layout.is-entering .sacs-sidebar__list > *:nth-child(n+10),
.sacs-layout.is-entering .sacs-table tbody > tr:nth-child(n+10)   { animation-delay: 200ms; }

/* Detail pane gets a directional slide so drilling in reads as "forward" */
.sacs-layout.is-entering .sacs-detail {
  animation: sacs-panel-slide-in 280ms var(--ease-swift) both;
}

/* =====================================================================
   3. BUTTONS — press physics + ripple + busy state
   ===================================================================== */

.sacs-btn {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition:
    filter     var(--duration-xfast) var(--ease-swift),
    transform  var(--duration-xfast) var(--ease-swift),
    box-shadow var(--duration-fast)  var(--ease-swift),
    background var(--duration-fast)  var(--ease-swift),
    border-color var(--duration-fast) var(--ease-swift),
    opacity    var(--duration-fast)  var(--ease-swift);
}

.sacs-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* A real press: sinks below rest position, snappier than the hover */
.sacs-btn:active:not(:disabled) {
  transform: translateY(1px) scale(0.985);
  box-shadow: none;
  transition-duration: 60ms;
}

.sacs-btn--primary:hover:not(:disabled) { box-shadow: 0 4px 12px rgba(37,99,235,0.28); }
.sacs-btn--danger:hover:not(:disabled)  { box-shadow: 0 4px 12px rgba(220,38,38,0.26); }
.sacs-btn--success:hover:not(:disabled) { box-shadow: 0 4px 12px rgba(5,150,105,0.26); }
.sacs-btn--teal:hover:not(:disabled)    { box-shadow: 0 4px 12px rgba(8,145,178,0.26); }

.sacs-btn:disabled { transition: opacity var(--duration-normal) var(--ease-swift); }

/* Ripple element injected by js/motion.js */
.sacs-ripple {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  background: currentColor;
  opacity: 0;
  transform: scale(0);
  animation: sacs-ripple-out 520ms var(--ease-out) forwards;
  z-index: 0;
}
.sacs-btn--primary .sacs-ripple,
.sacs-btn--danger  .sacs-ripple,
.sacs-btn--success .sacs-ripple,
.sacs-btn--teal    .sacs-ripple { background: #fff; }

/* Busy / in-flight state — add `.is-busy` while an action is pending */
.sacs-btn.is-busy {
  pointer-events: none;
  color: transparent !important;
}
.sacs-btn.is-busy::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 15px;
  height: 15px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  color: var(--text-inverse);
  animation: sacs-spin 620ms linear infinite;
}
.sacs-btn--secondary.is-busy::after,
.sacs-btn--ghost.is-busy::after { color: var(--text-secondary); }

/* Non-.sacs-btn action buttons (filter-pill style actions e.g. quotation
   Accept/Convert) get a muted in-flight state instead of the spinner. */
.sacs-pill-btn.is-busy {
  pointer-events: none;
  opacity: 0.55;
}

/* =====================================================================
   4. CARDS & ROWS — hover elevation, click affordance
   ===================================================================== */

.sacs-card,
.sacs-kpi-card,
.sacs-chart-card,
.sacs-info-card,
.sacs-ledger-card,
.sacs-doc-card {
  transition:
    transform    var(--duration-normal) var(--ease-swift),
    box-shadow   var(--duration-normal) var(--ease-swift),
    border-color var(--duration-normal) var(--ease-swift),
    background   var(--duration-fast)   var(--ease-swift);
}

.sacs-card--hoverable:hover,
.sacs-kpi-card:hover,
.sacs-chart-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.sacs-card--hoverable:active { transform: translateY(0); transition-duration: 70ms; }

/* Sidebar shipment card — the existing 3px left rail fades in on hover
   and locks to full colour on select, instead of snapping. Nudging the
   text 3px right on hover gives the row a tactile "pick up" feel. */
.sacs-scard {
  transition:
    background        var(--duration-fast)   var(--ease-swift),
    border-left-color var(--duration-normal) var(--ease-swift),
    padding-left      var(--duration-normal) var(--ease-swift);
}
.sacs-scard:hover:not(.sacs-scard--selected):not(.sacs-scard--selected-teal) {
  border-left-color: var(--border-medium);
  padding-left: 17px;
}

/* Table rows — soft wash + left rail on hover, no layout shift */
.sacs-table__row,
.sacs-table--expenses tbody tr,
.sacs-table--quotes tbody tr,
.sacs-leaderboard__row,
.sacs-arrival-row,
.sacs-doc-item,
.sacs-attach-row {
  transition:
    background var(--duration-xfast) var(--ease-swift),
    box-shadow var(--duration-xfast) var(--ease-swift);
}

.sacs-table__row--click:hover,
.sacs-table--expenses tbody tr:hover,
.sacs-table--quotes tbody tr:hover {
  box-shadow: inset 2px 0 0 var(--accent-blue);
}

.sacs-table__row--click:active { background: var(--bg-active); transition-duration: 50ms; }

/* =====================================================================
   5. MODALS — coordinated overlay fade + content spring, in AND out
   ===================================================================== */

.sacs-modal-overlay--open {
  animation: sacs-overlay-in 180ms var(--ease-swift) both;
}

.sacs-modal-overlay--open > .sacs-modal,
.sacs-modal-overlay--open > * > .sacs-modal {
  animation: sacs-modal-in 280ms var(--ease-out) both;
}

/* `.is-closing` is applied by js/motion.js so the dismissal is animated
   too — otherwise modals vanish on a display:none frame. */
.sacs-modal-overlay.is-closing {
  display: flex !important;
  pointer-events: none;
  animation: sacs-overlay-out 160ms var(--ease-swift) both;
}
.sacs-modal-overlay.is-closing .sacs-modal {
  animation: sacs-modal-out 160ms var(--ease-swift) both;
}

.sacs-modal { transition: box-shadow var(--duration-normal) var(--ease-swift); }

/* Slide-over panels (Hermes, doc viewer) */
.sacs-docviewer {
  transition: transform var(--duration-slow) var(--ease-swift),
              opacity   var(--duration-normal) var(--ease-swift);
}

.sacs-help-overlay--open { animation: sacs-overlay-in 180ms var(--ease-swift) both; }
.sacs-help-overlay--open .sacs-help-box { animation: sacs-modal-in 280ms var(--ease-out) both; }

/* =====================================================================
   6. TOAST — spring in, settle, fade out (classes set by js/motion.js)
   ===================================================================== */

.sacs-toast,
#toast {
  transition: box-shadow var(--duration-normal) var(--ease-swift);
  will-change: transform, opacity;
}

.sacs-toast.is-in,
#toast.is-in { animation: sacs-toast-slide-in 240ms var(--ease-out) both; }

.sacs-toast.is-out,
#toast.is-out { animation: sacs-toast-slide-out 200ms var(--ease-swift) both; }

/* =====================================================================
   7. NAVIGATION — section tabs, drawer, pills
   ===================================================================== */

/* Animated underline instead of a hard border swap */
.sacs-secbtn {
  position: relative;
  border-bottom-color: transparent;
  transition:
    color      var(--duration-fast) var(--ease-swift),
    background var(--duration-fast) var(--ease-swift);
}
.sacs-secbtn::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 0;
  height: 2px;
  border-radius: 2px 2px 0 0;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--duration-normal) var(--ease-swift);
}
.sacs-secbtn:hover::after { transform: scaleX(0.5); opacity: 0.4; }
.sacs-secbtn[aria-current="page"]::after { transform: scaleX(1); opacity: 1; }

.sacs-nav-drawer:not([hidden]) { animation: sacs-drawer-in 200ms var(--ease-swift) both; }
.sacs-nav-drawer__backdrop:not([hidden]) { animation: sacs-overlay-in 160ms var(--ease-swift) both; }

.sacs-nav-drawer__item,
.sacs-nav-menu-btn,
.sacs-pill-btn,
.sacs-filter-pills > *,
.sacs-focus-tab,
.sacs-tab,
.sacs-back-btn {
  transition:
    background   var(--duration-fast) var(--ease-swift),
    color        var(--duration-fast) var(--ease-swift),
    border-color var(--duration-fast) var(--ease-swift),
    transform    var(--duration-fast) var(--ease-swift),
    box-shadow   var(--duration-fast) var(--ease-swift);
}

.sacs-pill-btn:active,
.sacs-focus-tab:active,
.sacs-tab:active { transform: scale(0.96); transition-duration: 60ms; }

.sacs-back-btn:hover { transform: translateX(-2px); }

/* Detail tabs get the same sliding underline. The accent lives on the
   pseudo-element so it can scale; the real border is neutralised. */
.sacs-tab { position: relative; border-bottom-color: transparent !important; }
.sacs-tab::after {
  content: "";
  position: absolute;
  left: 10px; right: 10px; bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent-blue);
  transform: scaleX(0);
  transition: transform var(--duration-normal) var(--ease-swift);
}
.sacs-tab--active-teal::after { background: var(--accent-teal); }
.sacs-tab--active::after,
.sacs-tab--active-teal::after { transform: scaleX(1); }

/* .sacs-focus-tab is a segmented pill, not an underline — its active
   state is a background swap, so it only needs the press physics above. */

/* Live-connection dot actually breathes while connecting */
.sacs-conn-dot--connecting { animation: sacs-dot-breathe 1.4s var(--ease-in-out) infinite; }

/* Badge count changes pop (js/motion.js adds .is-bumped) */
.sync-badge.is-bumped,
#nav-menu-badge.is-bumped { animation: sacs-badge-pop 200ms var(--ease-out); }

/* =====================================================================
   8. FORMS — focus ring grows instead of blinking
   ===================================================================== */

.sacs-input,
.sacs-textarea,
.sacs-search-input,
select,
input[type="text"],
input[type="number"],
input[type="date"],
input[type="email"],
textarea {
  transition:
    border-color var(--duration-fast) var(--ease-swift),
    box-shadow   var(--duration-fast) var(--ease-swift),
    background   var(--duration-fast) var(--ease-swift);
}

.sacs-search-wrap { transition: transform var(--duration-normal) var(--ease-swift); }
.sacs-search-wrap:focus-within { transform: translateY(-1px); }

.sacs-upload-zone {
  transition:
    border-color var(--duration-normal) var(--ease-swift),
    background   var(--duration-normal) var(--ease-swift),
    transform    var(--duration-normal) var(--ease-swift);
}
.sacs-upload-zone--dragover { transform: scale(1.01); }

.sacs-doc-check,
input[type="checkbox"],
input[type="radio"] { transition: background-color var(--duration-fast) var(--ease-swift),
                                   border-color var(--duration-fast) var(--ease-swift),
                                   color var(--duration-fast) var(--ease-swift); }

/* =====================================================================
   9. DATA VISUALS — bars fill, chips lift, progress eases
   ===================================================================== */

.sacs-progress__fill,
.sacs-kpi-card__bar-fill,
.sacs-confidence-bar__fill,
.sacs-scard__progress-fill {
  transition: transform 280ms var(--ease-swift), background var(--duration-normal) var(--ease-swift);
}

.sacs-layout.is-entering .sacs-progress__fill,
.sacs-layout.is-entering .sacs-kpi-card__bar-fill,
.sacs-layout.is-entering .sacs-confidence-bar__fill {
  transform-origin: left center;
  animation: sacs-bar-grow 620ms var(--ease-swift) both;
}

.sacs-chip,
.sacs-pill,
.sacs-health-pill,
.sacs-health-badge {
  transition: transform var(--duration-fast) var(--ease-swift),
              box-shadow var(--duration-fast) var(--ease-swift);
}
.sacs-chip:hover,
.sacs-pill:hover { transform: translateY(-1px); }

/* Workflow timeline — stage circles ease between states */
.sacs-timeline__circle,
.sacs-timeline__line,
.sacs-status-pipeline__step,
.sacs-status-pipeline__line {
  transition: background var(--duration-normal) var(--ease-swift),
              border-color var(--duration-normal) var(--ease-swift),
              color var(--duration-normal) var(--ease-swift),
              transform var(--duration-normal) var(--ease-out);
}
.sacs-timeline__item:hover .sacs-timeline__circle { transform: scale(1.12); }
.sacs-timeline__circle--active { animation: sacs-glow 2.2s var(--ease-in-out) infinite; }

/* Collapsible sections actually collapse */
.sacs-collapse__toggle { transition: transform var(--duration-normal) var(--ease-swift); }
.sacs-collapse__toggle--open { transform: rotate(90deg); }

/* =====================================================================
   10. CHROME — scroll shadow, scrollbar, skeletons
   ===================================================================== */

.sacs-topnav { transition: box-shadow var(--duration-normal) var(--ease-swift); }
.sacs-topnav.is-scrolled { box-shadow: var(--shadow-md); }

/* Scrollbars: 4px was invisible. Widen, and reveal the thumb on hover. */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: transparent;
  border: 3px solid transparent;
  border-radius: 999px;
  background-clip: content-box;
  transition: background var(--duration-normal) var(--ease-swift);
}
*:hover::-webkit-scrollbar-thumb { background: var(--border-medium); background-clip: content-box; }
::-webkit-scrollbar-thumb:hover  { background: var(--text-tertiary) !important; background-clip: content-box; }

/* Skeletons shimmer with a soft light sweep */
.sacs-skeleton {
  background: linear-gradient(90deg,
    var(--bg-hover) 25%,
    rgba(255,255,255,0.85) 50%,
    var(--bg-hover) 75%);
  background-size: 200% 100%;
  animation: sacs-shimmer 1.4s var(--ease-in-out) infinite;
}

/* Empty states arrive rather than appear */
.sacs-empty { animation: sacs-panel-in 320ms var(--ease-swift) both; }
.sacs-empty__icon { transition: transform var(--duration-slow) var(--ease-out); }
.sacs-empty:hover .sacs-empty__icon { transform: scale(1.06) rotate(-3deg); }

/* Value roll-up during count animation (js/motion.js) */
.sacs-counting { font-variant-numeric: tabular-nums; }

/* =====================================================================
   11. ACCESSIBILITY — hard stop for reduced-motion users
   base.css already neutralises durations; this removes the
   transform-based choreography too, so nothing shifts position.
   ===================================================================== */

@media (prefers-reduced-motion: reduce) {
  /* js/motion.js never sets .is-entering under reduced-motion, so the
     entrance rules are already inert. These cover the CSS-only ones. */
  .sacs-modal-overlay--open,
  .sacs-modal-overlay--open > .sacs-modal,
  .sacs-toast.is-in,
  #toast.is-in,
  .sacs-empty,
  .sacs-timeline__circle--active,
  .sacs-conn-dot--connecting {
    animation: none !important;
  }
  .sacs-btn:hover:not(:disabled),
  .sacs-btn:active:not(:disabled),
  .sacs-card--hoverable:hover,
  .sacs-kpi-card:hover,
  .sacs-chart-card:hover,
  .sacs-kpi-click:hover,
  .sacs-chip:hover,
  .sacs-pill:hover,
  .sacs-carrier-chip:hover,
  .sacs-alert-chip:hover,
  .sacs-back-btn:hover,
  .sacs-wf-row:hover .sacs-wf-circle,
  .sacs-timeline__item:hover .sacs-timeline__circle {
    transform: none !important;
  }
  .sacs-scard:hover:not(.sacs-scard--selected):not(.sacs-scard--selected-teal) { padding-left: 14px; }
  .sacs-ripple { display: none !important; }
}