physics-toast.css

/* ================================ Variables ================================ */
:root {
  --sileo-spring-easing: linear(0, 0.002 0.6%, 0.007 1.2%, 0.015 1.8%, 0.026 2.4%, 0.041 3.1%,
      0.06 3.8%, 0.108 5.3%, 0.157 6.6%, 0.214 8%, 0.467 13.7%,
      0.577 16.3%, 0.631 17.7%, 0.682 19.1%, 0.73 20.5%, 0.771 21.8%,
      0.808 23.1%, 0.844 24.5%, 0.874 25.8%, 0.903 27.2%, 0.928 28.6%,
      0.952 30.1%, 0.972 31.6%, 0.988 33.1%, 1.01 35.7%, 1.025 38.5%,
      1.034 41.6%, 1.038 45%, 1.035 50.1%, 1.012 64.2%, 1.003 73%,
      0.999 83.7%, 1);
  --sileo-duration: 550ms;
  --sileo-height: 40px;
  --sileo-width: 350px;

  --sileo-state-success: oklch(0.723 0.219 142.136);
  --sileo-state-loading: oklch(0.556 0 0);
  --sileo-state-error: oklch(0.637 0.237 25.331);
  --sileo-state-warning: oklch(0.795 0.184 86.047);
  --sileo-state-info: oklch(0.685 0.169 237.323);
  --sileo-state-action: oklch(0.623 0.214 259.815);
}

/* ================================== Toast ================================== */
[data-sileo-toast] {
  position: relative;
  box-sizing: border-box;
  cursor: pointer;
  pointer-events: auto;
  touch-action: none;
  border: 0;
  background: transparent;
  padding: 0;
  font: inherit;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: inherit;
  text-align: left;
  outline: none;
  width: var(--sileo-width);
  height: var(--_h, var(--sileo-height));
  opacity: 0;
  transform: translateZ(0) scale(0.95);
  transform-origin: center;
  contain: layout style;
  overflow: visible;
}

[data-sileo-toast][data-state="loading"] {
  cursor: default;
}

[data-sileo-toast][data-ready="true"] {
  opacity: 1;
  transform: translateZ(0) scale(1);
  transition:
    transform calc(var(--sileo-duration) * 0.66) var(--sileo-spring-easing),
    opacity calc(var(--sileo-duration) * 0.66) var(--sileo-spring-easing),
    margin-bottom calc(var(--sileo-duration) * 0.66) var(--sileo-spring-easing),
    margin-top calc(var(--sileo-duration) * 0.66) var(--sileo-spring-easing),
    height var(--sileo-duration) var(--sileo-spring-easing);
}

/* Entry direction */
[data-sileo-viewport][data-position^="top"] [data-sileo-toast]:not([data-ready="true"]) {
  transform: translateY(-6px) scale(0.95);
}

[data-sileo-viewport][data-position^="bottom"] [data-sileo-toast]:not([data-ready="true"]) {
  transform: translateY(6px) scale(0.95);
}

/* Exit */
[data-sileo-toast][data-ready="true"][data-exiting="true"] {
  opacity: 0;
  pointer-events: none;
}

[data-sileo-viewport][data-position^="top"] [data-sileo-toast][data-ready="true"][data-exiting="true"] {
  transform: translateY(-6px) scale(0.95);
}

[data-sileo-viewport][data-position^="bottom"] [data-sileo-toast][data-ready="true"][data-exiting="true"] {
  transform: translateY(6px) scale(0.95);
}

/* ============================== State Colors =============================== */
[data-sileo-toast][data-state] { --_c: var(--sileo-state-success); }
[data-sileo-toast][data-state="loading"] { --_c: var(--sileo-state-loading); }
[data-sileo-toast][data-state="error"] { --_c: var(--sileo-state-error); }
[data-sileo-toast][data-state="warning"] { --_c: var(--sileo-state-warning); }
[data-sileo-toast][data-state="info"] { --_c: var(--sileo-state-info); }
[data-sileo-toast][data-state="action"] { --_c: var(--sileo-state-action); }

/* ================================ SVG Canvas =============================== */
[data-sileo-canvas] {
  position: absolute;
  left: 0;
  right: 0;
  pointer-events: none;
  transform: translateZ(0);
  contain: layout style;
  overflow: visible;
}

[data-sileo-canvas][data-edge="top"] {
  bottom: 0;
  transform: scaleY(-1) translateZ(0);
}

[data-sileo-canvas][data-edge="bottom"] {
  top: 0;
}

[data-sileo-svg] {
  overflow: visible;
}

/* ================================= Header ================================= */
[data-sileo-header] {
  position: absolute;
  z-index: 20;
  display: flex;
  align-items: center;
  padding: 0.5rem;
  height: var(--sileo-height);
  overflow: hidden;
  left: var(--_px, 0px);
  transform: var(--_ht);
  max-width: var(--_pw);
}

[data-sileo-toast][data-ready="true"] [data-sileo-header] {
  transition:
    transform var(--sileo-duration) var(--sileo-spring-easing),
    left var(--sileo-duration) var(--sileo-spring-easing),
    max-width var(--sileo-duration) var(--sileo-spring-easing);
}

[data-sileo-header][data-edge="top"] {
  bottom: 0;
}

[data-sileo-header][data-edge="bottom"] {
  top: 0;
}

/* Header inner morphing */
[data-sileo-header-stack] {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 100%;
}

[data-sileo-header-inner] {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

[data-sileo-header-inner][data-layer="current"],
[data-sileo-header-inner][data-exiting="true"] {
  will-change: opacity, filter;
}

[data-sileo-header-inner][data-layer="current"] {
  animation: sileo-header-enter var(--sileo-duration) var(--sileo-spring-easing) both;
}

[data-sileo-header-inner][data-layer="prev"] {
  position: absolute;
  left: 0;
  top: 0;
  pointer-events: none;
}

[data-sileo-header-inner][data-exiting="true"] {
  animation: sileo-header-exit 300ms ease forwards;
}

/* ================================== Badge ================================== */
[data-sileo-badge] {
  display: flex;
  height: 24px;
  width: 24px;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  padding: 2px;
  border-radius: 9999px;
  color: var(--_c);
  background-color: color-mix(in oklch, var(--_c) 20%, transparent);
}

[data-sileo-badge] svg {
  width: 16px;
  height: 16px;
}

/* ================================== Title ================================== */
[data-sileo-title] {
  font-size: 0.825rem;
  line-height: 1rem;
  font-weight: 500;
  text-transform: capitalize;
  color: var(--_c);
}

/* ================================= Content ================================= */
[data-sileo-content] {
  position: absolute;
  left: 0;
  z-index: 10;
  width: 100%;
  pointer-events: none;
  opacity: var(--_co, 0);
}

[data-sileo-content]:not([data-visible="true"]) {
  content-visibility: hidden;
}

[data-sileo-toast][data-ready="true"] [data-sileo-content] {
  transition: opacity calc(var(--sileo-duration) * 0.08) ease calc(var(--sileo-duration) * 0.04);
}

[data-sileo-content][data-edge="top"] {
  top: 0;
}

[data-sileo-content][data-edge="bottom"] {
  top: var(--sileo-height);
}

[data-sileo-content][data-visible="true"] {
  pointer-events: auto;
}

[data-sileo-toast][data-ready="true"] [data-sileo-content][data-visible="true"] {
  transition: opacity calc(var(--sileo-duration) * 0.5) ease calc(var(--sileo-duration) * 0.25);
}

[data-sileo-description] {
  padding: 1rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: #6e6e73;
  content-visibility: auto;
}

/* ================================== Button ================================= */
[data-sileo-button] {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 1.75rem;
  padding: 0 0.625rem;
  margin-top: 0.75rem;
  border-radius: 9999px;
  border: 0;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  color: var(--_c);
  background-color: color-mix(in oklch, var(--_c) 15%, transparent);
  transition: background-color 150ms ease;
}

[data-sileo-button]:hover {
  background-color: color-mix(in oklch, var(--_c) 25%, transparent);
}

/* ================================ Animations =============================== */
[data-sileo-icon="spin"] {
  animation: sileo-spin 1s linear infinite;
}

@keyframes sileo-spin {
  to {
    rotate: 360deg;
  }
}

@keyframes sileo-header-enter {
  from {
    opacity: 0;
    filter: blur(6px);
  }

  to {
    opacity: 1;
    filter: blur(0px);
  }
}

@keyframes sileo-header-exit {
  from {
    opacity: 1;
    filter: blur(0px);
  }

  to {
    opacity: 0;
    filter: blur(6px);
  }
}

/* ================================ Viewports ================================ */
[data-sileo-viewport] {
  position: fixed;
  z-index: 50;
  display: flex;
  gap: 0.75rem;
  padding: 0.75rem;
  pointer-events: none;
  max-width: calc(100vw - 1.5rem);
  contain: layout style;
}

/* Stacking: new toast collapses in with negative margin */
[data-sileo-viewport][data-position^="top"] [data-sileo-toast]:not([data-ready="true"]) {
  margin-bottom: calc(-1 * (var(--sileo-height) + 0.75rem));
}

[data-sileo-viewport][data-position^="bottom"] [data-sileo-toast]:not([data-ready="true"]) {
  margin-top: calc(-1 * (var(--sileo-height) + 0.75rem));
}

/* Vertical edge */
[data-sileo-viewport][data-position^="top"] {
  top: 0;
  flex-direction: column-reverse;
}

[data-sileo-viewport][data-position^="bottom"] {
  bottom: 0;
  flex-direction: column;
}

/* Horizontal alignment */
[data-sileo-viewport][data-position$="left"] {
  left: 0;
  align-items: flex-start;
}

[data-sileo-viewport][data-position$="right"] {
  right: 0;
  align-items: flex-end;
}

[data-sileo-viewport][data-position$="center"] {
  left: 50%;
  transform: translateX(-50%);
  align-items: center;
}

@media (prefers-reduced-motion: no-preference) {

  [data-sileo-toast][data-ready="true"]:hover,
  [data-sileo-toast][data-ready="true"][data-exiting="true"] {
    will-change: transform, opacity, height;
  }
}

@media (prefers-reduced-motion: reduce) {

  [data-sileo-toast],
  [data-sileo-toast] *,
  [data-sileo-toast] *::before,
  [data-sileo-toast] *::after {
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
    transition-duration: 0.01ms;
  }
}