/* =========================================================================
   Transitions — reprises de transitions.dev (Jakub Antalík, extraits libres
   du dépôt github.com/Jakubantalik/transitions.dev), telles quelles, sous leurs
   classes t-* ; Phoss les applique à ses menus, modales, pastilles, coches de
   succès, erreurs de saisie et onglets. Chaque bloc respecte
   prefers-reduced-motion. Régénéré par script : ne pas retoucher à la main.
   ========================================================================= */

/* transitions-dev — copy this :root block into your project once.
   Every transition snippet reads from these semantic names. */
:root {
  /* ── Motion tokens — shared scale ──────────────────────────────
     Reference these with var(--…) anywhere in your project. The
     transitions below ship literal values so each snippet works on
     its own; `transitions refine` maps hardcoded values back to
     these tokens. */
  /* Durations */
  --duration-stagger: 40ms;  /* per-item stagger offset */
  --duration-micro: 80ms;  /* tooltip/path delay, shake segment, large stagger */
  --duration-quick: 150ms;  /* modal/dropdown close, text swap, tooltip appear */
  --duration-fast: 250ms;  /* icon swap, dropdown/modal open, tabs sliding, page slide */
  --duration-medium: 350ms;  /* panel close, toast close */
  --duration-slow: 400ms;  /* panel open, skeleton content reveal, input clear */
  --duration-very-slow: 500ms;  /* emphasis moments, badge appear, text reveal, success check */
  /* Easings */
  --ease-smooth-out: cubic-bezier(0.22, 1, 0.36, 1);  /* modal/dropdown/panel open + close, page slide, resize, position change */
  --ease-in-out: ease-in-out;  /* icon swap, text swap, text reveal, skeleton reveal */
  --ease-out: ease-out;  /* tooltip open / close */
  --ease-linear: linear;  /* shimmer, skeleton pulse, spinner */
  --ease-bounce: cubic-bezier(0.34, 1.36, 0.64, 1);  /* badge pop open */
  --ease-bounce-strong: cubic-bezier(0.34, 3.85, 0.64, 1);  /* bouncy hover-out (avatar return) */
  /* Distances */
  --distance-micro: 4px;  /* text swap */
  --distance-small: 6px;  /* error shake (small segment) */
  --distance-base: 8px;  /* badge diagonal reveal, page slide, error shake (large segment) */
  --distance-medium: 12px;  /* text reveal */
  --distance-large: 30px;  /* check badge appear */
  /* Scales */
  --scale-large: 0.96;  /* modal open / close */
  --scale-medium: 0.97;  /* dropdown open */
  --scale-small: 0.98;  /* tooltip open */
  --scale-tiny: 0.99;  /* dropdown close */
  /* Blur */
  --blur-small: 2px;  /* panel reveal, icon swap, text swap, skeleton reveal, number pop-in */
  --blur-medium: 3px;  /* page slide, text reveal */
  --blur-large: 8px;  /* success check open */

  /* Card resize */
  --resize-dur: 300ms;
  --resize-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Number pop-in */
  --digit-dur: 500ms;
  --digit-distance: 8px;
  --digit-stagger: 70ms;
  --digit-blur: 2px;
  --digit-ease: cubic-bezier(0.34, 1.45, 0.64, 1);
  --digit-dir-x: 0;
  --digit-dir-y: 1;
  /* Notification badge */
  --badge-slide-dur: 260ms;
  --badge-pop-dur: 500ms;
  --badge-pop-close-dur: 180ms;
  --badge-fade-dur: 400ms;
  --badge-fade-close-dur: 180ms;
  --badge-blur: 2px;
  --badge-offset-x: -8.2px;
  --badge-offset-y: 12.4px;
  --badge-slide-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --badge-pop-ease: cubic-bezier(0.34, 1.36, 0.64, 1);
  --badge-close-ease: cubic-bezier(0.4, 0, 0.2, 1);
  /* Text states swap */
  --text-swap-dur: 150ms;
  --text-swap-translate-y: 4px;
  --text-swap-blur: 2px;
  --text-swap-ease: ease-in-out;
  /* Menu dropdown */
  --dropdown-open-dur: 250ms;
  --dropdown-close-dur: 150ms;
  --dropdown-pre-scale: 0.97;
  --dropdown-closing-scale: 0.99;
  --dropdown-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Modal open / close */
  --modal-open-dur: 250ms;
  --modal-close-dur: 150ms;
  --modal-scale: 0.96;
  --modal-scale-close: 0.96;
  --modal-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Panel reveal */
  --panel-open-dur: 400ms;
  --panel-close-dur: 350ms;
  --panel-translate-y: 100px;
  --panel-blur: 2px;
  --panel-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Page side-by-side */
  --page-slide-dur: 250ms;
  --page-fade-dur: 250ms;
  --page-slide-distance: 8px;
  --page-blur: 3px;
  --page-stagger: 0ms;
  --page-exit-enabled: 1;
  --page-slide-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --page-fade-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Icon swap */
  --icon-swap-dur: 250ms;
  --icon-swap-blur: 2px;
  --icon-swap-start-scale: 0.25;
  --icon-swap-ease: ease-in-out;
  /* Success check */
  --check-opacity-dur: 500ms;
  --check-rotate-dur: 500ms;
  --check-rotate-from: 80deg;
  --check-bob-dur: 500ms;
  --check-y-amount: 40px;
  --check-blur-dur: 500ms;
  --check-blur-from: 10px;
  --check-path-dur: 500ms;
  --check-path-delay: 80ms;
  --check-ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --check-ease-opacity: cubic-bezier(0.22, 1, 0.36, 1);
  --check-ease-rotate: cubic-bezier(0.22, 1, 0.36, 1);
  --check-ease-bob: cubic-bezier(0.34, 1.35, 0.64, 1);
  --check-ease-path: cubic-bezier(0.22, 1, 0.36, 1);
  /* Avatar group hover */
  --avatar-lift: -4px;
  --avatar-dur: 320ms;
  --avatar-scale: 1.05;
  --avatar-falloff: 0.45;
  --avatar-ease-in: cubic-bezier(0.22, 1, 0.36, 1);
  --avatar-ease-out: cubic-bezier(0.34, 3.85, 0.64, 1);
  /* Error state shake */
  --shake-distance: 6px;
  --shake-overshoot: 4px;
  --shake-dur-a: 80ms;
  --shake-dur-b: 60ms;
  --shake-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --revert-hold: 3000ms;
  --revert-dur: 280ms;
  /* Input clear with dissolve */
  --clear-dur: 1000ms;
  --clear-out-dur: 400ms;
  --clear-in-dur: 400ms;
  --clear-out-fly: 12px;
  --clear-in-fly: 12px;
  --clear-out-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --clear-in-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --clear-blur: 2px;
  --glow-delay: 50ms;
  --glow-peak-at: 0.15;
  --glow-opacity: 0.42;
  --glow-spread: 1.5;
  /* Skeleton loader and reveal */
  --pulse-dur: 1000ms;
  --pulse-count: 1;
  --pulse-min: 0.5;
  --reveal-dur: 400ms;
  --reveal-blur: 2px;
  --reveal-ease: ease-in-out;
  /* Shimmer text */
  --shimmer-dur: 2000ms;
  --shimmer-base: #7c7c7c;
  --shimmer-highlight: #0d0d0d;
  --shimmer-band: 400%;
  --shimmer-ease: linear;
  /* Tabs sliding */
  --tabs-dur: 250ms;
  --tabs-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --tabs-text-muted: rgba(15, 15, 15, 0.8);
  --tabs-text-active: #0f0f0f;
  --tabs-bar-bg: #f1f1f1;
  --tabs-pill-bg: #ffffff;
  /* Tooltip open/close */
  --tt-in-dur: 150ms;
  --tt-out-dur: 50ms;
  --tt-scale: 0.98;
  --tt-delay: 80ms;
  --tt-in-ease: ease-out;
  --tt-out-ease: ease-out;
  --tt-move-dur: 160ms;
  --tt-move-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --tt-bg: #ffffff;
  --tt-fg: #2f2f2f;
  /* Texts reveal */
  --stagger-dur: 500ms;
  --stagger-distance: 12px;
  --stagger-stagger: 40ms;
  --stagger-blur: 3px;
  --stagger-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Card hover tilt */
  --tilt-perspective: 1000px;
  --tilt-return: 1000ms;
  --tilt-return-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --tilt-follow: 400ms;
  --tilt-follow-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --tilt-glare-opacity: 0.32;
  --tilt-glare-fade: 300ms;
  --tilt-glare-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Plus to menu morph */
  --morph-open-dur: 350ms;
  --morph-close-dur: 250ms;
  --morph-ease: cubic-bezier(0.34, 1.25, 0.64, 1);
  --morph-close-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --morph-r-closed: 40px;
  --morph-r-open: 20px;
  --morph-fade-dur: 200ms;
  --morph-slide: 40px;
  --morph-rotate: 45deg;
  --morph-scale: 0.97;
  --morph-blur: 2px;
  /* Accordion expand */
  --acc-expand: 250ms;
  --acc-collapse: 250ms;
  --acc-chevron: 250ms;
  --acc-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Toast open / close */
  --toast-open: 350ms;
  --toast-close: 250ms;
  --toast-distance: 16px;
  --toast-blur: 2px;
  --toast-scale: 0.97;
  --toast-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Like button */
  --like-color: #f40051;
  --like-fill: 150ms;
  --like-pop: 350ms;
  --like-pop-ease: cubic-bezier(0.34, 1.96, 0.64, 1);
  --like-particle-dur: 600ms;
  --like-particle-dist: 20px;
  --like-particle-size: 2.5px;
  --like-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Learn more hover */
  --learn-shift: 2px;
  --learn-spread: 8deg;
  --learn-in: 350ms;
  --learn-out: 350ms;
  --learn-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Checkbox check */
  --check-box: 150ms;
  --check-draw: 350ms;
  --check-delay: 0ms;
  --check-uncheck: 150ms;
  --check-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Spinning counter */
  --reel-dur: 1400ms;
  --reel-cell: 30px;
  --reel-spin-blur: 3px;
  --reel-stagger: 90ms;
  --reel-ease: cubic-bezier(0.16, 1, 0.3, 1);
  /* Toggle */
  --toggle-dur: 350ms;
  --toggle-travel: 14.66px;
  --toggle-ov1: 1px;
  --toggle-ov2: 0px;
  --toggle-track: 0ms;
  --toggle-ease: cubic-bezier(0.34, 1.35, 0.64, 1);
  /* Thinking states */
  --think-hold: 2000ms;
  --think-swap: 150ms;
  --think-gap: 50ms;
  --think-distance: 8px;
  --think-blur: 2px;
  --think-shimmer: 2000ms;
  --think-base: #7c7c7c;
  --think-highlight: #0d0d0d;
  --think-ease: ease-in-out;
  /* Reasoning stream */
  --reason-hold: 840ms;
  --reason-step: 500ms;
  --reason-lines: 2;
  --reason-fade: 28px;
  --reason-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Streaming text */
  --stream-gap: 60ms;
  --stream-fade: 350ms;
  --stream-blur: 1px;
  --stream-ease: cubic-bezier(0.22, 1, 0.36, 1);
  /* Matrix dot loader */
  --matrix-cycle: 1200ms;
  --matrix-base: #d9d9d9;
  --matrix-active: #85858f;
  --matrix-ease: ease-in-out;
  /* Banner stacking */
  --stack-open: 350ms;
  --stack-close: 250ms;
  --stack-rise: 60px;
  --stack-blur: 2px;
  --stack-scale: 0.97;
  --stack-peek: 12px;
  --stack-spread-gap: 8px;
  --stack-depth-scale: 0.06;
  --stack-depth-fade: 0.4;
  --stack-depth1-blur: 1px;
  --stack-depth2-blur: 2px;
  --stack-ease: cubic-bezier(0.22, 1, 0.36, 1);
}


/* --- 03-notification-badge --- */
:root {
  --badge-slide-dur: 260ms;
  --badge-pop-dur: 500ms;
  --badge-pop-close-dur: 180ms;
  --badge-fade-dur: 400ms;
  --badge-fade-close-dur: 180ms;
  --badge-blur: 2px;
  --badge-offset-x: -8.2px;
  --badge-offset-y: 12.4px;
  --badge-slide-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --badge-pop-ease: cubic-bezier(0.34, 1.36, 0.64, 1);
  --badge-close-ease: cubic-bezier(0.4, 0, 0.2, 1);
}
@keyframes t-badge-slide-in {
  from { transform: translate(var(--badge-offset-x), var(--badge-offset-y)); }
  to   { transform: translate(0, 0); }
}

/* .t-badge is the absolutely-positioned wrapper for the dot.
   Adjust top/right (or left/bottom) to anchor it on your trigger. */
.t-badge {
  position: absolute;
  top: -6px;
  right: -8px;
  pointer-events: none;
  will-change: transform;
}
.t-badge[data-open="true"] {
  animation: t-badge-slide-in var(--badge-slide-dur) var(--badge-slide-ease);
}

.t-badge-dot {
  display: block;
  transform-origin: center;
  transform: scale(1);
  opacity: 1;
  filter: blur(0);
  transition:
    transform var(--badge-pop-dur)  var(--badge-pop-ease),
    opacity   var(--badge-fade-dur) var(--badge-pop-ease),
    filter    var(--badge-pop-dur)  var(--badge-pop-ease);
  will-change: transform, opacity, filter;
}
.t-badge[data-open="false"] .t-badge-dot {
  transform: scale(0);
  opacity: 0;
  filter: blur(var(--badge-blur));
  transition:
    transform var(--badge-pop-close-dur)  var(--badge-close-ease),
    opacity   var(--badge-fade-close-dur) var(--badge-close-ease),
    filter    var(--badge-pop-close-dur)  var(--badge-close-ease);
}

@media (prefers-reduced-motion: reduce) {
  .t-badge, .t-badge-dot { animation: none !important; transition: none !important; }
}


/* --- 04-text-states-swap --- */
:root {
  --text-swap-dur: 150ms;
  --text-swap-translate-y: 4px;
  --text-swap-blur: 2px;
  --text-swap-ease: ease-in-out;
}
.t-text-swap {
  display: inline-block;
  transform: translateY(0);
  filter: blur(0);
  opacity: 1;
  transition:
    transform var(--text-swap-dur) var(--text-swap-ease),
    filter    var(--text-swap-dur) var(--text-swap-ease),
    opacity   var(--text-swap-dur) var(--text-swap-ease);
  will-change: transform, filter, opacity;
}
.t-text-swap.is-exit {
  transform: translateY(calc(var(--text-swap-translate-y) * -1));
  filter: blur(var(--text-swap-blur));
  opacity: 0;
}
.t-text-swap.is-enter-start {
  transform: translateY(var(--text-swap-translate-y));
  filter: blur(var(--text-swap-blur));
  opacity: 0;
  transition: none;
}

@media (prefers-reduced-motion: reduce) {
  .t-text-swap { transition: none !important; }
}


/* --- 05-menu-dropdown --- */
:root {
  --dropdown-open-dur: 250ms;
  --dropdown-close-dur: 150ms;
  --dropdown-pre-scale: 0.97;
  --dropdown-closing-scale: 0.99;
  --dropdown-ease: cubic-bezier(0.22, 1, 0.36, 1);
}
.t-dropdown {
  transform-origin: top left;
  transform: scale(var(--dropdown-pre-scale));
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--dropdown-open-dur) var(--dropdown-ease),
    opacity   var(--dropdown-open-dur) var(--dropdown-ease);
  will-change: transform, opacity;
}
.t-dropdown[data-origin="top-right"]     { transform-origin: top right; }
.t-dropdown[data-origin="top-center"]    { transform-origin: top center; }
.t-dropdown[data-origin="bottom-left"]   { transform-origin: bottom left; }
.t-dropdown[data-origin="bottom-center"] { transform-origin: bottom center; }
.t-dropdown[data-origin="bottom-right"]  { transform-origin: bottom right; }

.t-dropdown.is-open {
  transform: scale(1);
  opacity: 1;
  pointer-events: auto;
}
.t-dropdown.is-closing {
  transform: scale(var(--dropdown-closing-scale));
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--dropdown-close-dur) var(--dropdown-ease),
    opacity   var(--dropdown-close-dur) var(--dropdown-ease);
}

@media (prefers-reduced-motion: reduce) {
  .t-dropdown { transition: none !important; }
}


/* --- 06-modal --- */
:root {
  --modal-open-dur: 250ms;
  --modal-close-dur: 150ms;
  --modal-scale: 0.96;
  --modal-scale-close: 0.96;
  --modal-ease: cubic-bezier(0.22, 1, 0.36, 1);
}
.t-modal {
  transform-origin: center;
  transform: scale(var(--modal-scale));
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--modal-open-dur) var(--modal-ease),
    opacity   var(--modal-open-dur) var(--modal-ease);
  will-change: transform, opacity;
}
.t-modal.is-open {
  transform: scale(1);
  opacity: 1;
  pointer-events: auto;
}
.t-modal.is-closing {
  transform: scale(var(--modal-scale-close));
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--modal-close-dur) var(--modal-ease),
    opacity   var(--modal-close-dur) var(--modal-ease);
}

@media (prefers-reduced-motion: reduce) {
  .t-modal { transition: none !important; }
}


/* --- 09-icon-swap --- */
:root {
  --icon-swap-dur: 250ms;
  --icon-swap-blur: 2px;
  --icon-swap-start-scale: 0.25;
  --icon-swap-ease: ease-in-out;
}
.t-icon-swap {
  position: relative;
  display: inline-grid;
}
.t-icon-swap .t-icon {
  grid-area: 1 / 1;
  transition:
    opacity   var(--icon-swap-dur) var(--icon-swap-ease),
    filter    var(--icon-swap-dur) var(--icon-swap-ease),
    transform var(--icon-swap-dur) var(--icon-swap-ease);
  will-change: opacity, filter, transform;
}
.t-icon-swap[data-state="a"] .t-icon[data-icon="a"],
.t-icon-swap[data-state="b"] .t-icon[data-icon="b"] {
  opacity: 1;
  filter: blur(0);
  transform: scale(1);
}
.t-icon-swap[data-state="a"] .t-icon[data-icon="b"],
.t-icon-swap[data-state="b"] .t-icon[data-icon="a"] {
  opacity: 0;
  filter: blur(var(--icon-swap-blur));
  transform: scale(var(--icon-swap-start-scale));
}

@media (prefers-reduced-motion: reduce) {
  .t-icon-swap .t-icon { transition: none !important; }
}


/* --- 10-success-check --- */
:root {
  --check-opacity-dur: 500ms;
  --check-rotate-dur: 500ms;
  --check-rotate-from: 80deg;
  --check-bob-dur: 500ms;
  --check-y-amount: 40px;
  --check-blur-dur: 500ms;
  --check-blur-from: 10px;
  --check-path-dur: 500ms;
  --check-path-delay: 80ms;
  --check-ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --check-ease-opacity: cubic-bezier(0.22, 1, 0.36, 1);
  --check-ease-rotate: cubic-bezier(0.22, 1, 0.36, 1);
  --check-ease-bob: cubic-bezier(0.34, 1.35, 0.64, 1);
  --check-ease-path: cubic-bezier(0.22, 1, 0.36, 1);
}
/* Wrapper drives the appear animation; it doesn't own any
   sizing or color so you can drop in any icon. */
.t-success-check {
  display: inline-block;
  transform-origin: center;
  opacity: 0;
  will-change: transform, opacity, filter;
}
/* overflow: visible keeps the stroke from clipping while it
   draws; display: block kills the inline whitespace under SVGs. */
.t-success-check svg { display: block; overflow: visible; }
/* Stroke-draw setup. Replace 20 with the result of
   path.getTotalLength() for your path; round caps mean any
   sub-pixel overshoot is invisible. */
.t-success-check svg path {
  stroke-dasharray: 20;
  stroke-dashoffset: 20;
}

.t-success-check[data-state="in"] {
  animation:
    t-check-fade   var(--check-opacity-dur) var(--check-ease-opacity) forwards,
    t-check-rotate var(--check-rotate-dur)  var(--check-ease-rotate)  forwards,
    t-check-blur   var(--check-blur-dur)    var(--check-ease-out)     forwards,
    t-check-bob    var(--check-bob-dur)     var(--check-ease-bob)     forwards;
}
.t-success-check[data-state="in"] svg path {
  animation: t-check-draw var(--check-path-dur) var(--check-ease-path) var(--check-path-delay, 0ms) forwards;
}

@keyframes t-check-fade { from { opacity: 0; } to { opacity: 1; } }
@keyframes t-check-rotate {
  from { transform: rotate(var(--check-rotate-from)); }
  to   { transform: rotate(0deg); }
}
@keyframes t-check-blur {
  from { filter: blur(var(--check-blur-from)); }
  to   { filter: blur(0); }
}
@keyframes t-check-bob {
  from { translate: 0 var(--check-y-amount); }
  to   { translate: 0 0; }
}
@keyframes t-check-draw { to { stroke-dashoffset: 0; } }

@media (prefers-reduced-motion: reduce) {
  .t-success-check { animation: none !important; opacity: 1; }
  .t-success-check svg path { animation: none !important; stroke-dashoffset: 0 !important; }
}


/* --- 12-error-state-shake --- */
:root {
  --shake-distance: 6px;
  --shake-overshoot: 4px;
  --shake-dur-a: 80ms;
  --shake-dur-b: 60ms;
  --shake-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --revert-hold: 3000ms;
  --revert-dur: 280ms;
}
/* Border-color tween. Define your input's default / focused
   / error border-color in your own component CSS — this rule
   only owns the interpolation. Use a constant border-width
   across states so the tween never shifts inner content. */
.t-input {
  transition: border-color 150ms ease-out;
  will-change: transform;
}
.t-input.is-error {
  /* Error border auto-reverts on the hold timer, so the
     fade-out uses the slower revert duration (matches the
     message fade). */
  transition: border-color var(--revert-dur, 280ms) ease-out;
}

/* Error message reveal. Visibility is delayed by --revert-dur
   on hide so the message stays painted for the full opacity
   fade-out. Entering .is-error drops the delay to 0 so the
   message becomes visible immediately. */
.t-error-msg {
  opacity: 0;
  visibility: hidden;
  transition:
    opacity    var(--revert-dur, 280ms) ease-out,
    visibility 0s linear var(--revert-dur, 280ms);
}
.t-input-wrap.is-error .t-error-msg {
  opacity: 1;
  visibility: visible;
  transition:
    opacity    var(--revert-dur, 280ms) ease-out,
    visibility 0s linear 0s;
}

/* Multi-segment keyframe with per-stop easing so each leg
   of the shake follows its own cubic-bezier independently.
   %-stops are cumulative durations as a fraction of the
   total (80, 60, 80, 60 = 280ms): 28.57%, 57.14%, 78.57%,
   100%. Recompute if any segment duration changes. */
.t-input.is-shaking {
  animation: t-input-shake calc(
      var(--shake-dur-a) * 2 + var(--shake-dur-b) * 2
    ) linear;
}
@keyframes t-input-shake {
  0%      { transform: translateX(0);                                 animation-timing-function: var(--shake-ease); }
  28.57%  { transform: translateX(var(--shake-distance));             animation-timing-function: var(--shake-ease); }
  57.14%  { transform: translateX(calc(var(--shake-distance) * -1)); animation-timing-function: var(--shake-ease); }
  78.57%  { transform: translateX(var(--shake-overshoot));            animation-timing-function: var(--shake-ease); }
  100%    { transform: translateX(0); }
}

@media (prefers-reduced-motion: reduce) {
  .t-input { animation: none !important; transform: none !important; }
}


/* --- 16-tabs-sliding --- */
:root {
  --tabs-dur: 250ms;
  --tabs-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --tabs-text-muted: rgba(15, 15, 15, 0.8);
  --tabs-text-active: #0f0f0f;
  --tabs-bar-bg: #f1f1f1;
  --tabs-pill-bg: #ffffff;
}
/* The bar is just a flex container with padding for the pill
   to sit inside. Tabs sit on z-index: 1, the pill on z-index: 0,
   so labels read above the pill background. */
.t-tabs {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 3px;
  border-radius: 48px;
  background: var(--tabs-bar-bg);
}
.t-tab {
  position: relative;
  appearance: none;
  border: 0;
  background: transparent;
  height: 30px;
  padding: 4px 12px;
  color: var(--tabs-text-muted);
  cursor: pointer;
  border-radius: 48px;
  z-index: 1;
  transition: color var(--tabs-dur) var(--tabs-ease);
}
.t-tab:not([aria-selected="true"]):hover,
.t-tab[aria-selected="true"] {
  color: var(--tabs-text-active);
}

/* The pill: width + transform are written inline by JS so
   the transition tweens between the previous and next
   measured positions. */
.t-tabs-pill {
  position: absolute;
  top: 3px;
  left: 0;
  height: 30px;
  width: 0;
  background: var(--tabs-pill-bg);
  border-radius: 48px;
  transform: translateX(0);
  transition:
    transform var(--tabs-dur) var(--tabs-ease),
    width     var(--tabs-dur) var(--tabs-ease);
  will-change: transform, width;
  z-index: 0;
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .t-tabs-pill, .t-tab { transition: none !important; }
}


/* --- 21-accordion --- */
:root {
  --acc-expand: 250ms;
  --acc-collapse: 250ms;
  --acc-chevron: 250ms;
  --acc-ease: cubic-bezier(0.22, 1, 0.36, 1);
}
/* grid-template-rows 0fr → 1fr gives a clean height animation
   with no JS measurement; the inner element clips overflow. */
.t-acc-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--acc-collapse) var(--acc-ease);
}
.t-acc[data-open="true"] .t-acc-panel {
  grid-template-rows: 1fr;
  transition: grid-template-rows var(--acc-expand) var(--acc-ease);
}
.t-acc-panel-inner {
  overflow: hidden;
  opacity: 0;
  filter: blur(2px);
  transition:
    opacity var(--acc-collapse) var(--acc-ease),
    filter var(--acc-collapse) var(--acc-ease);
}
.t-acc[data-open="true"] .t-acc-panel-inner {
  opacity: 1;
  filter: blur(0);
  transition:
    opacity var(--acc-expand) var(--acc-ease),
    filter var(--acc-expand) var(--acc-ease);
}
/* Flip the chevron vertically to turn the "v" into a "^".
   scaleY(-1) about the centre passes through a flat line at
   the midpoint (same look as a `d:` path morph) but animates
   in every browser, unlike CSS `d:` morphing (Chromium only).
   The chevron path is symmetric about the 16x16 viewBox
   centre, so the flip lands exactly on the "^"; non-scaling
   -stroke keeps the stroke width constant through the flip. */
.t-acc-chevron {
  display: inline-flex;
  transform: scaleY(1);
  transform-origin: center;
  transition: transform var(--acc-chevron) var(--acc-ease);
}
.t-acc-chevron path { vector-effect: non-scaling-stroke; }
.t-acc[data-open="true"] .t-acc-chevron {
  transform: scaleY(-1);
}

@media (prefers-reduced-motion: reduce) {
  .t-acc-panel, .t-acc-panel-inner, .t-acc-chevron {
    transition: none !important;
  }
}


/* --- 22-toast --- */
:root {
  --toast-open: 350ms;
  --toast-close: 250ms;
  --toast-distance: 16px;
  --toast-blur: 2px;
  --toast-scale: 0.97;
  --toast-ease: cubic-bezier(0.22, 1, 0.36, 1);
}
.t-toast {
  opacity: 0;
  transform: translateY(var(--toast-distance)) scale(var(--toast-scale));
  filter: blur(var(--toast-blur));
  will-change: transform, opacity, filter;
  transition:
    opacity var(--toast-close) var(--toast-ease),
    transform var(--toast-close) var(--toast-ease),
    filter var(--toast-close) var(--toast-ease);
}
.t-toast.is-open {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
  transition:
    opacity var(--toast-open) var(--toast-ease),
    transform var(--toast-open) var(--toast-ease),
    filter var(--toast-open) var(--toast-ease);
}

@media (prefers-reduced-motion: reduce) {
  .t-toast { transition: none !important; }
}