/* Reusable milky-glass content filter.
 * The Drupal View and its Isotope links remain the source of truth.
 */

.i2-content-filter {
  --i2-filter-ink: #13203a;
  --i2-filter-muted: #5f6c81;
  --i2-filter-accent: #338508;
  --i2-filter-blue: #304999;
  --i2-filter-border: rgba(48, 73, 153, 0.16);
  --i2-filter-surface: rgba(250, 252, 255, 0.78);
  --i2-filter-green: rgba(224, 246, 218, 0.9);
  --i2-filter-highlight: rgba(255, 255, 255, 0.78);
  --i2-filter-shadow: 0 20px 55px rgba(21, 42, 72, 0.16);
  --i2-filter-radius: 28px;
  --i2-filter-gutter: clamp(12px, 2vw, 22px);
  --i2-filter-target: 48px;
  --i2-filter-duration: 420ms;
  color: var(--i2-filter-ink);
}

.i2-content-filter__surface {
  position: relative;
}

.i2-content-filter__ambient,
.i2-content-filter__trigger {
  display: none;
}

.i2-content-filter.is-enhanced {
  position: fixed;
  z-index: 470;
  left: 50%;
  bottom: max(16px, env(safe-area-inset-bottom));
  width: min(360px, calc(100vw - 32px));
  margin: 0;
  pointer-events: none;
  opacity: 0;
  transform: translate3d(-50%, calc(100% + 32px), 0);
  transition:
    opacity 240ms ease,
    transform var(--i2-filter-duration) cubic-bezier(0.22, 1, 0.36, 1);
}

.i2-content-filter.is-enhanced.is-visible {
  pointer-events: auto;
  opacity: 1;
  transform: translate3d(-50%, 0, 0);
}

.i2-content-filter.is-enhanced .i2-content-filter__surface {
  display: block;
  min-height: 62px;
  overflow: hidden;
  isolation: isolate;
  border: 1px solid var(--i2-filter-border);
  border-radius: var(--i2-filter-radius);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.86), rgba(241, 247, 250, 0.68)),
    var(--i2-filter-surface);
  box-shadow:
    inset 0 1px 0 var(--i2-filter-highlight),
    inset 0 -1px 0 rgba(48, 73, 153, 0.05),
    var(--i2-filter-shadow);
  -webkit-backdrop-filter: blur(18px) saturate(135%);
  backdrop-filter: blur(18px) saturate(135%);
}

.i2-content-filter.is-enhanced .i2-content-filter__ambient {
  position: absolute;
  z-index: -1;
  inset: 0;
  display: block;
  opacity: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 14%, rgba(255, 255, 255, 0.92), transparent 38%),
    radial-gradient(circle at 84% 6%, rgba(51, 133, 8, 0.2), transparent 42%),
    linear-gradient(155deg, var(--i2-filter-green), rgba(238, 247, 244, 0.82));
}

.i2-content-filter.is-enhanced.is-open .i2-content-filter__surface {
  border-color: rgba(51, 133, 8, 0.2);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.88),
    inset 0 -1px 0 rgba(51, 133, 8, 0.06),
    0 28px 72px rgba(21, 58, 44, 0.2);
}

.i2-content-filter.is-enhanced.is-open .i2-content-filter__ambient {
  opacity: 1;
}

.i2-content-filter.is-enhanced .i2-content-filter__options.nav-tabs {
  position: absolute;
  right: 0;
  bottom: 62px;
  left: 0;
  display: grid;
  gap: 3px;
  width: auto;
  max-height: min(66svh, 520px);
  margin: 0;
  padding: var(--i2-filter-gutter) var(--i2-filter-gutter) 8px;
  overflow-x: hidden;
  overflow-y: auto;
  border: 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(48, 73, 153, 0.2) transparent;
}

.i2-content-filter.is-enhanced .i2-content-filter__options > li {
  display: block;
  float: none;
  width: 100%;
  margin: 0;
  padding: 0;
}

.i2-content-filter.is-enhanced .i2-content-filter__options > li > a {
  position: relative;
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 10px;
  min-height: var(--i2-filter-target);
  margin: 0;
  padding: 10px 14px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 16px;
  background: transparent;
  color: var(--i2-filter-ink);
  font: inherit;
  font-size: clamp(0.92rem, 0.88rem + 0.12vw, 1rem);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-align: left;
  text-transform: none;
  transition:
    color 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.i2-content-filter.is-enhanced .i2-content-filter__options > li > a::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.28;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.i2-content-filter.is-enhanced .i2-content-filter__options > li > a::after {
  content: "✓";
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border-radius: 50%;
  background: rgba(51, 133, 8, 0.1);
  color: var(--i2-filter-accent);
  font-size: 0.72rem;
  opacity: 0;
  transform: scale(0.72);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.i2-content-filter.is-enhanced .i2-content-filter__options > li > a:hover {
  border-color: rgba(48, 73, 153, 0.12);
  background: rgba(255, 255, 255, 0.46);
}

.i2-content-filter.is-enhanced .i2-content-filter__options > li > a.active {
  border-color: rgba(255, 255, 255, 0.68);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.66), rgba(229, 244, 237, 0.38)),
    rgba(255, 255, 255, 0.28);
  color: var(--i2-filter-ink);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    inset 0 -1px 0 rgba(51, 133, 8, 0.07),
    0 10px 24px rgba(35, 73, 54, 0.1);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  backdrop-filter: blur(12px) saturate(130%);
}

.i2-content-filter.is-enhanced .i2-content-filter__options > li > a.active::before,
.i2-content-filter.is-enhanced .i2-content-filter__options > li > a.active::after {
  opacity: 1;
  transform: scale(1);
}

/*
 * Tech Trend's existing Drupal behavior uses clickable list items rather than
 * links. Keep those items as the AJAX source of truth while giving them the
 * same material and interaction language as the Works filter.
 */
.i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter {
  position: relative;
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr) 22px;
  align-items: center;
  gap: 10px;
  min-height: var(--i2-filter-target);
  margin: 0;
  padding: 10px 14px;
  overflow: hidden;
  border: 1px solid transparent;
  border-radius: 16px;
  background: transparent;
  color: var(--i2-filter-ink);
  font: inherit;
  font-size: clamp(0.92rem, 0.88rem + 0.12vw, 1rem);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.01em;
  text-align: left;
  text-transform: none;
  cursor: pointer;
  transition:
    color 180ms ease,
    border-color 180ms ease,
    background-color 180ms ease,
    box-shadow 180ms ease;
}

.i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.28;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter::after {
  content: "✓";
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border-radius: 50%;
  background: rgba(51, 133, 8, 0.1);
  color: var(--i2-filter-accent);
  font-size: 0.72rem;
  opacity: 0;
  transform: scale(0.72);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter:hover {
  border-color: rgba(48, 73, 153, 0.12);
  background: rgba(255, 255, 255, 0.46);
}

.i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter.active {
  border-color: rgba(255, 255, 255, 0.68);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.66), rgba(229, 244, 237, 0.38)),
    rgba(255, 255, 255, 0.28);
  color: var(--i2-filter-ink);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.92),
    inset 0 -1px 0 rgba(51, 133, 8, 0.07),
    0 10px 24px rgba(35, 73, 54, 0.1);
  -webkit-backdrop-filter: blur(12px) saturate(130%);
  backdrop-filter: blur(12px) saturate(130%);
}

.i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter.active::before,
.i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter.active::after {
  opacity: 1;
  transform: scale(1);
}

.i2-content-filter.is-enhanced .i2-content-filter__trigger {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 0;
  left: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 40px;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 62px;
  margin: 0;
  padding: 10px 12px 10px 20px;
  border: 0;
  border-top: 1px solid rgba(48, 73, 153, 0.08);
  border-radius: 0;
  background: transparent;
  color: var(--i2-filter-ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
  appearance: none;
}

.i2-content-filter.is-enhanced .i2-content-filter__trigger-copy {
  display: grid;
  min-width: 0;
  gap: 1px;
}

.i2-content-filter.is-enhanced .i2-content-filter__eyebrow {
  color: var(--i2-filter-muted);
  font-size: 0.66rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.i2-content-filter.is-enhanced .i2-content-filter__current {
  overflow: hidden;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: -0.02em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.i2-content-filter.is-enhanced .i2-content-filter__toggle {
  position: relative;
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid rgba(48, 73, 153, 0.14);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.44);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72);
}

.i2-content-filter.is-enhanced .i2-content-filter__toggle > span {
  position: absolute;
  width: 13px;
  height: 1px;
  background: currentColor;
  transform-origin: center;
}

.i2-content-filter.is-enhanced .i2-content-filter__toggle > span:last-child {
  transform: rotate(90deg);
}

.i2-content-filter.is-enhanced.is-open .i2-content-filter__toggle > span:last-child {
  transform: rotate(0deg);
}

.i2-content-filter.is-enhanced :is(a, button):focus-visible {
  outline: 3px solid rgba(48, 73, 153, 0.34);
  outline-offset: 2px;
}

/*
 * The enhanced filter becomes fixed and therefore leaves normal document flow.
 * Reserve its former visual rhythm before the Isotope grid without touching
 * the grid items or their JS-controlled transforms.
 */
.i2-content-filter.is-enhanced + .gva-portfolio-items {
  margin-top: clamp(128px, 9vw, 152px);
}

/* The Tech Trend list follows a large title block, so only retain a modest
 * in-flow rhythm when its filter becomes fixed. */
.blog-view > .i2-content-filter--blog.is-enhanced + * {
  margin-top: clamp(36px, 4.5vw, 68px);
}

@media (max-width: 560px) {
  .i2-content-filter.is-enhanced {
    bottom: max(10px, env(safe-area-inset-bottom));
    width: min(348px, calc(100vw - 24px));
  }

  .i2-content-filter.is-enhanced .i2-content-filter__surface,
  .i2-content-filter.is-enhanced .i2-content-filter__trigger {
    min-height: 58px;
  }

  .i2-content-filter.is-enhanced .i2-content-filter__options.nav-tabs {
    bottom: 58px;
  }

  .i2-content-filter.is-enhanced .i2-content-filter__trigger {
    grid-template-columns: minmax(0, 1fr) 38px;
    padding-left: 17px;
  }

  .i2-content-filter.is-enhanced .i2-content-filter__toggle {
    width: 38px;
    height: 38px;
  }

  .i2-content-filter.is-enhanced .i2-content-filter__options.nav-tabs {
    max-height: min(70svh, 470px);
    padding-inline: 10px;
  }

  .i2-content-filter.is-enhanced .i2-content-filter__options > li > a {
    min-height: 46px;
    padding-block: 9px;
  }

  .i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter {
    min-height: 46px;
    padding-block: 9px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .i2-content-filter.is-enhanced {
    transition: none;
  }

  .i2-content-filter.is-enhanced .i2-content-filter__options > li > a,
  .i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter,
  .i2-content-filter.is-enhanced .i2-content-filter__options > li > a::before,
  .i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter::before,
  .i2-content-filter.is-enhanced .i2-content-filter__options > li > a::after,
  .i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter::after,
  .i2-content-filter.is-enhanced .i2-content-filter__toggle > span {
    transition: none;
  }
}

@media (forced-colors: active) {
  .i2-content-filter.is-enhanced .i2-content-filter__surface,
  .i2-content-filter.is-enhanced .i2-content-filter__options > li > a,
  .i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter {
    border: 1px solid CanvasText;
    background: Canvas;
    color: CanvasText;
  }

  .i2-content-filter.is-enhanced .i2-content-filter__options > li > a.active {
    outline: 2px solid Highlight;
  }

  .i2-content-filter--blog.is-enhanced .i2-content-filter__options > li.btn-filter.active {
    outline: 2px solid Highlight;
  }
}