/* ==============================================
   UMBC Mosaic Block
   style.css
   ============================================== */

/* ── Shared block shell ─────────────────────────────── */
.umbc-mosaic-block {
  --mosaic-gold:        var(--umbc-btn-gold, #fdb515);
  --mosaic-black:       #000;
  --mosaic-white:       #fff;
  --mosaic-bg:          transparent;
  --mosaic-text:        #111;
  --mosaic-subtext:     #555;
  --mosaic-tag-bg:      var(--mosaic-gold);
  --mosaic-tag-text:    #000;
  --mosaic-overlay-bg:  rgba(0,0,0,0.82);
  --mosaic-card-bg:     #fff;
  --mosaic-card-text:   #111;
  --mosaic-card-sub:    #555;
  --mosaic-card-border: #e8e8e8;

  width: 100%;
  background-color: var(--mosaic-bg);
  color: var(--mosaic-text);
}

/* ── Dark theme ─────────────────────────────────────── */
[data-theme="dark"] .umbc-mosaic-block {
  --mosaic-bg:          transparent;
  --mosaic-text:        #fff;
  --mosaic-subtext:     rgba(255,255,255,0.72);
  --mosaic-overlay-bg:  rgba(0,0,0,0.88);
  --mosaic-card-bg:     #1e1e1e;
  --mosaic-card-text:   #e8e8e8;
  --mosaic-card-sub:    rgba(232,232,232,0.6);
  --mosaic-card-border: rgba(255,255,255,0.1);
}

/* ── Section header ─────────────────────────────────── */
.mosaic-header {
  max-width: 800px;
  margin: 0 auto clamp(2rem, 4vw, 3rem);
  text-align: center;
}

.mosaic-header__title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--mosaic-text);
  margin: 0 0 0.75rem;
}

.mosaic-header__sub {
  font-size: 1rem;
  color: var(--mosaic-subtext);
  margin: 0;
  line-height: 1.6;
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   IDENTITY MOSAIC MODE
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */
.mosaic-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 200px;
  gap: var(--mosaic-gap, 8px);
}

/* Uniform fill grid (Columns set to a number). Every tile is an equal
   cell, so a few tiles fill the row cleanly with no empty space. The
   per-tile sm/md/tall/lg spans are intentionally overridden here. */
.mosaic-grid--uniform {
  grid-template-columns: repeat(var(--mosaic-cols, 2), 1fr);
  grid-auto-rows: auto;
}

.mosaic-grid--uniform .mosaic-tile {
  aspect-ratio: 4 / 3;
}

.mosaic-grid--uniform .mosaic-tile--sm,
.mosaic-grid--uniform .mosaic-tile--md,
.mosaic-grid--uniform .mosaic-tile--tall,
.mosaic-grid--uniform .mosaic-tile--lg {
  grid-column: span 1;
  grid-row: span 1;
}

/* Tile sizing */
.mosaic-tile {
  position: relative;
  overflow: hidden;
  border-radius: var(--umbc-radius-sm, 4px);
  background: #1a1a1a;
}

.mosaic-tile.has-link {
  cursor: pointer;
}

/* Full-tile click target — covers the whole tile so a single
   tap/click anywhere navigates. Sits above the decorative
   face / overlay / tag layers. */
.mosaic-tile__cover-link {
  position: absolute;
  inset: 0;
  z-index: 4;
  display: block;
  text-decoration: none;
  /* keep the text caption inside the focus ring */
  border-radius: inherit;
}

.mosaic-tile__cover-link:focus-visible {
  outline: 3px solid var(--mosaic-gold);
  outline-offset: -3px;
}

.mosaic-tile--sm {
  grid-column: span 1;
  grid-row: span 1;
}

.mosaic-tile--md {
  grid-column: span 2;
  grid-row: span 1;
}

.mosaic-tile--tall {
  grid-column: span 1;
  grid-row: span 2;
}

.mosaic-tile--lg {
  grid-column: span 2;
  grid-row: span 2;
}

/* will-animate: same pattern as stories cards */
.mosaic-tile.will-animate {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.mosaic-tile.will-animate.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .mosaic-tile.will-animate {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* Face image */
.mosaic-tile__face {
  position: absolute;
  inset: 0;
}

.mosaic-tile__face img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

@media (prefers-reduced-motion: reduce) {
  .mosaic-tile__face img {
    transition: none;
  }
}

/* Expand overlay — hidden by default */
.mosaic-tile__expand {
  position: absolute;
  inset: 0;
  background: var(--mosaic-overlay-bg);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.1rem 1rem 1rem;
  gap: 0.3rem;
  opacity: 0;
  transition: opacity 0.25s ease;
  /* hidden from screen readers when collapsed */
}

/* Brand-theme tag — identity mosaic only */
.mosaic-tile__tag {
  position: absolute;
  bottom: 0.6rem;
  left: 0.7rem;
  z-index: 3;
  pointer-events: none; /* decorative; never block the link beneath it */
  display: inline-block;
  background: var(--mosaic-tag-bg);
  color: var(--mosaic-tag-text);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.2em 0.6em;
  border-radius: var(--umbc-radius-pill, 999px);
  transition: opacity 0.25s ease;
}

/* Persistent title + tagline — grid mode.
   Pre-hover overlay covers more of the tile and starts darker so the
   white title/sub read against any underlying image. */
.mosaic-tile__label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 2;
  pointer-events: none; /* decorative; never block the link beneath it */
  padding: 1rem 1rem 0.875rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: 0.25rem;
  background: linear-gradient(
    to top,
    rgba(0, 0, 0, 0.92) 0%,
    rgba(0, 0, 0, 0.7) 55%,
    rgba(0, 0, 0, 0.2) 100%
  );
  transition: opacity 0.25s ease;
}

.mosaic-tile__label-title,
.mosaic-tile__label-sub {
  text-align: left;
  margin: 0;
  color: #fff;
}

.mosaic-tile__label-title {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
}

.mosaic-tile__label-sub {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.3;
}

/* Desktop hover */
@media (hover: hover) {
  .mosaic-tile:hover .mosaic-tile__face img {
    transform: scale(1.04);
  }

  .mosaic-tile:hover .mosaic-tile__expand {
    opacity: 1;
  }

  .mosaic-tile:hover .mosaic-tile__tag,
  .mosaic-tile:hover .mosaic-tile__label {
    opacity: 0;
  }
}

/* Touch / keyboard open state (JS adds .is-open) */
.mosaic-tile.is-open .mosaic-tile__expand {
  opacity: 1;
}

.mosaic-tile.is-open .mosaic-tile__tag,
.mosaic-tile.is-open .mosaic-tile__label {
  opacity: 0;
}

.mosaic-tile.is-open .mosaic-tile__face img {
  transform: scale(1.04);
}

/* Keyboard focus ring on tile */
.mosaic-tile:focus-visible {
  outline: 3px solid var(--mosaic-gold);
  outline-offset: 2px;
  z-index: 2;
}

@media (prefers-reduced-motion: reduce) {
  .mosaic-tile__expand,
  .mosaic-tile__tag,
  .mosaic-tile__label,
  .mosaic-tile__face img {
    transition: none;
  }
}

/* Expand content */
.mosaic-tile__name {
  font-size: 0.875rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
  line-height: 1.2;
}

.mosaic-tile__descriptor {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.7);
  margin: 0;
  line-height: 1.3;
}

.mosaic-tile__story {
  font-size: 0.8125rem;
  line-height: 1.45;
  color: rgba(255,255,255,0.85);
  margin: 0.25rem 0 0;
}

.mosaic-tile__link {
  display: inline-block;
  margin-top: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--mosaic-gold);
  text-decoration: underline;
  text-underline-offset: 2px;
  border: none;
  background: none;
  padding: 0;
}

.mosaic-tile__link:focus-visible {
  outline: 2px solid var(--mosaic-gold);
  outline-offset: 2px;
}

/* Mosaic responsive — Auto (span-based) mode only. The :not() guard keeps
   the uniform-fill grid on its own author-chosen column counts. */
@media (max-width: 960px) {
  .mosaic-grid:not(.mosaic-grid--uniform) {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 180px;
  }
}

/* At ~768px and down, tall portrait crops start to read poorly inside a
   landscape grid. Switch the whole grid to uniform 1×1 squares in 2
   columns so every tile shares the same crop shape. */
@media (max-width: 768px) {
  .mosaic-grid:not(.mosaic-grid--uniform) {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: auto;
  }

  .mosaic-grid:not(.mosaic-grid--uniform) .mosaic-tile--sm,
  .mosaic-grid:not(.mosaic-grid--uniform) .mosaic-tile--md,
  .mosaic-grid:not(.mosaic-grid--uniform) .mosaic-tile--tall,
  .mosaic-grid:not(.mosaic-grid--uniform) .mosaic-tile--lg {
    grid-column: span 1;
    grid-row: span 1;
    aspect-ratio: 1 / 1;
  }

  /* Uniform mode: honor the block's "Columns on mobile" setting. */
  .mosaic-grid--uniform {
    grid-template-columns: repeat(var(--mosaic-cols-mobile, 1), 1fr);
  }
}

/* Stack to a single column at narrow phone widths (Auto mode only). */
@media (max-width: 360px) {
  .mosaic-grid:not(.mosaic-grid--uniform) {
    grid-template-columns: 1fr;
  }
}

/* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   CATEGORY GRID MODE
   Uses the same mosaic-grid and mosaic-tile layout.
   Only difference: .mosaic-tile__tag shows tile_name
   instead of a brand theme (handled in PHP).
   ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ */

/* ══════════════════════════════════════════════
   RESEARCH-GRID MODE — 5-tile editorial grid
   Mirrors lp-rgrid from the brand landing page,
   namespaced for reuse as a block.
══════════════════════════════════════════════ */
.mosaic-rgrid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: clamp(150px, 17vw, 230px);
  gap: 6px;
}

.mosaic-rgrid__tile--a { grid-column: span 5; grid-row: span 2; }
.mosaic-rgrid__tile--b { grid-column: span 4; grid-row: span 2; }
.mosaic-rgrid__tile--c { grid-column: span 3; grid-row: span 2; }
.mosaic-rgrid__tile--d { grid-column: span 7; grid-row: span 2; }
.mosaic-rgrid__tile--e { grid-column: span 5; grid-row: span 2; }

@media (max-width: 900px) {
  .mosaic-rgrid { grid-template-columns: repeat(6, 1fr); }
  .mosaic-rgrid__tile--a { grid-column: span 6; }
  .mosaic-rgrid__tile--b { grid-column: span 3; }
  .mosaic-rgrid__tile--c { grid-column: span 3; }
  .mosaic-rgrid__tile--d { grid-column: span 6; }
  .mosaic-rgrid__tile--e { grid-column: span 6; }
}
@media (max-width: 560px) {
  .mosaic-rgrid {
    grid-template-columns: 1fr;
    grid-auto-rows: clamp(220px, 60vw, 300px);
  }
  .mosaic-rgrid__tile--a,
  .mosaic-rgrid__tile--b,
  .mosaic-rgrid__tile--c,
  .mosaic-rgrid__tile--d,
  .mosaic-rgrid__tile--e {
    grid-column: span 1;
    grid-row: span 1;
  }
}

.mosaic-rgrid__tile {
  position: relative;
  overflow: hidden;
  background: #1a1a1a;
  display: block;
  text-decoration: none;
  outline: none;
}
.mosaic-rgrid__tile:focus-visible {
  box-shadow: 0 0 0 3px var(--wp--preset--color--gold, #fdb515);
}

.mosaic-rgrid__face {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}
.mosaic-rgrid__tile:hover .mosaic-rgrid__face,
.mosaic-rgrid__tile:focus-visible .mosaic-rgrid__face { transform: scale(1.05); }

.mosaic-rgrid__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.9) 0%, rgba(0,0,0,.45) 45%, rgba(0,0,0,.05) 100%);
}
.mosaic-rgrid--pos-top .mosaic-rgrid__scrim {
  background: linear-gradient(to bottom, rgba(0,0,0,.9) 0%, rgba(0,0,0,.45) 45%, rgba(0,0,0,.05) 100%);
}
.mosaic-rgrid--pos-center .mosaic-rgrid__scrim {
  background: linear-gradient(to top, rgba(0,0,0,.82) 0%, rgba(0,0,0,.5) 50%, rgba(0,0,0,.82) 100%);
}

.mosaic-rgrid__body {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(1.1rem, 2vw, 1.75rem);
  gap: 0.875rem;
  border-top: 3px solid transparent;
}
.mosaic-rgrid--pos-bottom .mosaic-rgrid__body { justify-content: flex-end; }
.mosaic-rgrid--pos-top    .mosaic-rgrid__body { justify-content: flex-start; }
.mosaic-rgrid--pos-center .mosaic-rgrid__body { justify-content: center; }
.mosaic-rgrid__tile:hover .mosaic-rgrid__body,
.mosaic-rgrid__tile:focus-visible .mosaic-rgrid__body {
  border-top-color: var(--wp--preset--color--gold, #fdb515);
}

.mosaic-rgrid__text {
  font-size: clamp(0.8125rem, 1.15vw, 0.9375rem);
  line-height: 1.5;
  color: #fff;
  max-width: 46ch;
}

.mosaic-rgrid__link {
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wp--preset--color--gold, #fdb515);
  border-bottom: 1px solid currentColor;
  padding-bottom: 2px;
  align-self: flex-start;
  transition: color 0.12s;
}
.mosaic-rgrid__tile:hover .mosaic-rgrid__link { color: #fff; }

.mosaic-rgrid__footer {
  text-align: right;
  margin-top: clamp(2rem, 4vw, 3rem);
}
.mosaic-rgrid__cta {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--wp--preset--color--gold, #fdb515);
  border: 2px solid currentColor;
  padding: 0.875em 1.75em;
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
}
.mosaic-rgrid__cta:hover,
.mosaic-rgrid__cta:focus-visible {
  background: var(--wp--preset--color--gold, #fdb515);
  color: #000;
  outline: none;
}