/* Circle Animations Collection (see js/circles.js).
   Mobile first: base styles are for phones, min-width queries scale up. */

/* Overview: six live animations fill the 3:2 slider frame as a 3×2 grid */
.slider-frame.is-collection {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-rows: repeat(2, 1fr);
  gap: 1px;
  background: #fff; /* hairlines between cells */
  cursor: pointer;
}
.is-collection .circle-cell { background: var(--blue); }

.expand {
  min-height: 44px;
  margin-block: -12px; /* bigger tap area without moving the title row */
  font-size: var(--fs-m);
  transition: opacity 0.2s ease;
}

/* Full collection, opened below the project */
.collection {
  grid-column: 1 / -1;
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.6s cubic-bezier(0.65, 0, 0.35, 1);
}
.collection.is-open { grid-template-rows: 1fr; }
.collection-inner {
  min-height: 0;
  overflow: hidden;
  /* Room for the corner marks, which sit 8px outside each tile */
  margin-inline: -8px;
  padding: 28px 8px 8px;
}
.collection:not(.is-open) * { animation-play-state: paused; }

.collection-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

/* Tile: title on top, animation, Code bar along the bottom. The whole tile
   is the tap target; the bar is the visible cue (and the keyboard control). */
.circle-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  aspect-ratio: 3 / 4;
  background: var(--blue);
  color: #fff;
  cursor: pointer;
}
.circle-tile figcaption,
.tile-code {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.circle-tile figcaption { padding: 10px 10px 0; }
.tile-code {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  padding-inline: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  text-align: left;
  transition: opacity 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}
.tile-code::after { content: "</>"; letter-spacing: 0; }

/* Code view: a full-screen sheet on phones, animation above the code */
.code-view {
  width: 100%;
  max-width: none;
  height: 100%;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: 0;
  border: 0;
  background: var(--blue);
  color: #fff;
  font-size: var(--fs-s);
}
.code-view[open] {
  display: grid;
  /* minmax(0, …) so long code lines scroll inside .code-pre instead of
     widening the sheet past the screen */
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: 32dvh minmax(0, 1fr);
}
.code-view:focus { outline: none; }
.code-view::backdrop { background: rgba(0, 0, 0, 0.6); }
html:has(.code-view[open]) { overflow: hidden; } /* no page scroll behind it */

.code-stage {
  display: grid;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.code-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  padding: 12px 16px 0;
  padding-bottom: env(safe-area-inset-bottom);
}
.code-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.code-close,
.code-tabs button { min-height: 44px; }
.code-close { padding-inline: 12px; margin-right: -12px; }
.code-about {
  margin-top: 4px;
  max-width: 36em;
  line-height: 1.5;
  opacity: 0.8;
}

.code-tabs {
  display: flex;
  gap: 20px;
  margin-top: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}
.code-tabs [role="tab"] { opacity: 0.6; }
.code-tabs [aria-selected="true"] { opacity: 1; text-decoration: underline; text-underline-offset: 0.3em; }
.code-copy { margin-left: auto; }

.code-pre {
  flex: 1;
  min-width: 0;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  margin: 0 -16px;
  padding: 12px 16px 24px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.55;
  letter-spacing: 0;
  tab-size: 2;
  /* Wrap long lines on phones rather than scrolling sideways */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* Each animation is drawn at 180px and scaled to fit its cell (--s, set in JS) */
.circle-cell {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
/* Centered absolutely, so it stays centered even when larger than its cell */
.circle-stage {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 180px;
  height: 180px;
  margin: -90px 0 0 -90px;
  scale: var(--s, 1);
}

/* Corner marks only where there's hover */
.corner { display: none; }

@media (min-width: 760px) {
  .collection-inner { padding-top: clamp(28px, 3vw, 50px); }
  .collection-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--gap); }
  .circle-tile { aspect-ratio: 1; }
  .circle-tile figcaption, .tile-code { font-size: calc(var(--fs-s) * 0.8); }
  .circle-tile figcaption { padding: 0.9em 0.9em 0; }
  .tile-code { padding-inline: 0.9em; }

  /* Centered panel: animation on the left, explanation and code on the right */
  .code-view {
    width: min(1100px, 100% - 2 * var(--pad));
    height: min(680px, 100% - 2 * var(--pad));
    margin: auto;
    border: 1px solid rgba(255, 255, 255, 0.15);
  }
  .code-view[open] {
    grid-template-rows: none;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }
  .code-stage { border-bottom: 0; border-right: 1px solid rgba(255, 255, 255, 0.15); }
  .code-body { padding: clamp(16px, 2vw, 32px) clamp(16px, 2vw, 32px) 0; }
  .code-close { margin-right: -12px; }
  .code-about { margin-top: 0.6em; }
  .code-tabs { margin-top: 1.2em; }
  .code-pre { margin-inline: 0; padding-inline: 0; font-size: calc(var(--fs-s) * 0.82); white-space: pre; overflow-wrap: normal; }
}

@media (min-width: 1100px) {
  .collection-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (hover: hover) {
  .expand:hover,
  .code-close:hover,
  .code-copy:hover { opacity: 0.6; }
  .tile-code { opacity: 0.6; }
  .circle-tile:hover .tile-code,
  .tile-code:focus-visible { opacity: 1; background: #fff; color: var(--blue); }

  .corner {
    display: block;
    position: absolute;
    width: 16px;
    height: 16px;
    color: var(--blue);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .circle-tile:hover .corner { opacity: 1; }
  .corner svg { display: block; }
  .corner.top-left { top: -8px; left: -8px; }
  .corner.top-right { top: -8px; right: -8px; transition-delay: 0.1s; }
  .corner.bottom-left { bottom: -8px; left: -8px; transition-delay: 0.2s; }
  .corner.bottom-right { bottom: -8px; right: -8px; transition-delay: 0.3s; }
}

/* Shared dot; each animation's own CSS lives with its JS in js/circles.js */
.circle-stage .dot {
  position: absolute;
  border-radius: 50%;
  background: #fff;
}