/* =========================================
   Reusable UI Components
   Scope: music player, image modal, toast
========================================= */

/* =========================================
   1) Music Player
========================================= */
.music-button {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: var(--z-toast);

    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 2.875rem;
    height: 2.875rem;
    padding: 0;

    border: var(--border-width-thin) var(--border-style-default)
        color-mix(in srgb, var(--color-border) 85%, transparent);
    border-radius: var(--radius-round);

    background: var(--bg-page);
    color: var(--color-heading);
    box-shadow: var(--shadow-sm);
    opacity: 0;
    pointer-events: none;
    transform: translateY(0.5rem);

    transition:
        opacity var(--duration-base) ease,
        transform var(--duration-fast) ease,
        box-shadow var(--duration-fast) ease;
}

html.is-invitation-open .music-button {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.music-icon{
  display:block;
  color: inherit;
}

.music-button:hover{
    box-shadow:var(--shadow-md);
    transform:translateY(-1px);
}

.music-button:active{
    transform:translateY(1px) scale(.985);
}

.music-button:focus-visible{
    outline:.125rem solid var(--color-focus);
    outline-offset:.125rem;
}

.music-button.is-playing .music-icon{
    animation:musicSpin 8s linear infinite;
}

@keyframes musicSpin{
    from{
        transform:rotate(0deg);
    }

    to{
        transform:rotate(360deg);
    }
}

/* =========================================
   2) Image Modal
========================================= */
.image-modal {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: grid;
  place-items: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--duration-base) ease, visibility var(--duration-base) ease;
}

.image-modal[aria-hidden="false"] {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.image-modal-overlay {
  position: absolute;
  inset: 0;
  background-color: color-mix(in srgb, var(--color-heading) 75%, transparent);
}

.image-modal-content {
  position: relative;
  z-index: var(--z-base);
  width: min(100%, 64rem);
  max-height: 100vh;
  padding: 3.5rem 1rem 1rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.5rem;
}

.image-modal-figure {
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.image-modal-image-container {
  width: 100%;
  max-height: calc(100vh - 9rem);
  overflow: hidden;
  border-radius: var(--radius-md);
  background-color: color-mix(in srgb, var(--color-heading) 20%, transparent);
}

.image-modal-image {
  width: 100%;
  max-height: calc(100vh - 9rem);
  height: auto;
  object-fit: contain;
}

.image-modal-caption {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  line-height: 1.45;
  color: var(--bg-page);
  text-align: center;
}

.image-modal-close,
.image-modal-nav {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding-inline: 0.75rem;
  border-radius: var(--radius-round);
  border: var(--border-width-thin) var(--border-style-default) color-mix(in srgb, var(--bg-page) 35%, transparent);
  background-color: color-mix(in srgb, var(--bg-page) 20%, transparent);
  color: var(--bg-page);
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  line-height: 1;
  transition: background-color var(--duration-fast) ease, border-color var(--duration-fast) ease, transform var(--duration-fast) ease;
}

.image-modal-close {
  position: absolute;
  top: 0.75rem;
  right: 1rem;
}

.image-modal-close:hover,
.image-modal-nav:hover {
  background-color: color-mix(in srgb, var(--bg-page) 30%, transparent);
  border-color: color-mix(in srgb, var(--bg-page) 55%, transparent);
}

.image-modal-close:focus-visible,
.image-modal-nav:focus-visible {
  outline: 0.125rem solid var(--color-focus);
  outline-offset: 0.125rem;
}

.image-modal-close:active,
.image-modal-nav:active {
  transform: translateY(0.0625rem);
}

/* =========================================
   3) Toast Notification
========================================= */
.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: var(--z-toast);
  width: min(100% - 2rem, 20rem);
  display: grid;
  gap: 0.5rem;
}

.toast {
  padding: 0.75rem 0.875rem;
  border-radius: var(--radius-md);
  border: var(--border-width-thin) var(--border-style-default) var(--color-border);
  background-color: var(--bg-page);
  box-shadow: var(--shadow-sm);
  opacity: 1;
  transition: opacity var(--duration-fast) ease;
}

.toast-message {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  color: var(--color-heading);
}

.toast-success {
  background-color: color-mix(in srgb, var(--bg-surface) 88%, var(--bg-page));
}

.toast-error {
  background-color: color-mix(in srgb, var(--bg-muted) 92%, var(--bg-page));
}

.toast-warning {
  background-color: color-mix(in srgb, var(--bg-surface) 80%, var(--bg-page));
}

/* =========================================
   4) Back To Top Button
========================================= */
.back-to-top-button {
  position: fixed;
  right: 1rem;
  bottom: 5.5rem;
  z-index: var(--z-toast);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.875rem;
  height: 2.875rem;
  padding: 0;
  border-radius: var(--radius-round);
  border: var(--border-width-thin) var(--border-style-default) color-mix(in srgb, var(--color-border) 85%, transparent);
  background-color: var(--bg-page);
  box-shadow: var(--shadow-sm);
  color: var(--color-heading);
  font-size: 1rem;
  font-weight: var(--font-weight-bold);
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.75rem) scale(0.9);
  transition: opacity var(--duration-base) ease, transform var(--duration-base) ease, box-shadow var(--duration-fast) ease;
}

.back-to-top-button.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

html.is-auto-story-running .back-to-top-button {
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.75rem) scale(0.9);
}

.back-to-top-button:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-0.0625rem);
}

.back-to-top-button:active {
  transform: translateY(0.0625rem) scale(0.985);
}

.back-to-top-button:focus-visible {
  outline: 0.125rem solid var(--color-focus);
  outline-offset: 0.125rem;
}

@media (min-width: 48rem) {
.music-button{
    right:1.25rem;
    bottom:1.25rem;
}


  .image-modal-content {
    padding: 4rem 1.5rem 1.5rem;
    gap: 0.75rem;
  }

  .image-modal-close,
  .image-modal-nav {
    min-width: 3rem;
    min-height: 3rem;
  }

  .toast-container {
    top: 1.25rem;
    right: 1.25rem;
  }

  .back-to-top-button {
    right: 1.25rem;
    bottom: 6rem;
  }
}