.pch-learn {
  --ink: #101114;
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.14);
  --radius: 22px;
  --c1: #beb1ff;
  --c2: #7ef0c6;
  --c3: #ffd36e;
  --c4: #ff7fb0;
  --c5: #6ec7ff;
  --c6: #7dd3fc;
  --c7: #86efac;
  --pageBg: #f6f7fb;
  --pageFg: #0b0f1a;
  --cardBg: rgba(255, 255, 255, 0.98);
  --cardBorder: rgba(16, 17, 20, 0.1);
  --cardText: #0b0f1a;
  --cardMeta: rgba(16, 17, 20, 0.64);
  --tagBg: rgba(16, 17, 20, 0.05);
  --tagBorder: rgba(16, 17, 20, 0.12);
  --tagFg: rgba(16, 17, 20, 0.8);
  --blobBlend: multiply;
  --deckTop: 84px;
  --catH: 46px;
  --cardW: min(760px, 92vw);
  --artH: 420px;
  position: relative;
  isolation: isolate;
  margin: 1.25rem 0 2rem;
  padding-top: 34px;
  color: var(--pageFg);
  overflow: visible;
  border-radius: calc(var(--radius) + 10px);
}

.pch-learn[data-theme="dark"] {
  --pageBg: #0c1220;
  --pageFg: #ffffff;
  --cardBg: rgba(255, 255, 255, 0.92);
  --cardBorder: rgba(16, 17, 20, 0.1);
  --cardText: #101114;
  --cardMeta: rgba(16, 17, 20, 0.62);
  --tagBg: rgba(16, 17, 20, 0.04);
  --tagBorder: rgba(16, 17, 20, 0.12);
  --tagFg: rgba(16, 17, 20, 0.8);
  --blobBlend: screen;
}

.pch-learn .bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  border-radius: inherit;
  background:
    radial-gradient(1400px 980px at 8% 10%, rgba(190, 177, 255, 0.22), transparent 72%),
    radial-gradient(1200px 900px at 96% 16%, rgba(110, 199, 255, 0.18), transparent 74%),
    radial-gradient(1400px 1200px at 42% 98%, rgba(255, 127, 176, 0.14), transparent 74%),
    radial-gradient(1200px 1000px at 82% 88%, rgba(126, 240, 198, 0.12), transparent 74%),
    radial-gradient(1800px 1200px at 50% 46%, rgba(255, 255, 255, 0.6), transparent 78%),
    linear-gradient(180deg, rgba(246, 247, 251, 1) 0%, rgba(246, 247, 251, 1) 100%);
}

.pch-learn[data-theme="dark"] .bg {
  background:
    radial-gradient(1400px 980px at 8% 10%, rgba(190, 177, 255, 0.16), transparent 72%),
    radial-gradient(1200px 900px at 96% 16%, rgba(110, 199, 255, 0.12), transparent 74%),
    radial-gradient(1400px 1200px at 42% 98%, rgba(255, 127, 176, 0.1), transparent 74%),
    radial-gradient(1200px 1000px at 82% 88%, rgba(126, 240, 198, 0.1), transparent 74%),
    radial-gradient(1800px 1200px at 50% 46%, rgba(255, 255, 255, 0.07), transparent 78%),
    linear-gradient(180deg, rgba(12, 18, 32, 1) 0%, rgba(12, 18, 32, 1) 100%);
}

.pch-learn .bg::after {
  content: "";
  position: absolute;
  inset: -80px;
  background:
    radial-gradient(1200px 800px at 50% 26%, rgba(255, 255, 255, 0.4), transparent 72%),
    radial-gradient(900px 700px at 35% 82%, rgba(255, 255, 255, 0.28), transparent 74%);
  filter: blur(18px);
  opacity: 0.62;
  pointer-events: none;
}

.pch-learn[data-theme="dark"] .bg::after {
  background:
    radial-gradient(1200px 800px at 50% 26%, rgba(255, 255, 255, 0.08), transparent 72%),
    radial-gradient(900px 700px at 35% 82%, rgba(255, 255, 255, 0.06), transparent 74%);
  opacity: 0.52;
}

.pch-learn .blob {
  position: absolute;
  width: min(560px, 62vw);
  aspect-ratio: 1/1;
  border-radius: 999px;
  filter: blur(22px);
  opacity: 0.82;
  transform: translate3d(var(--x, 0px), var(--y, 0px), 0) scale(var(--s, 1));
  will-change: transform;
  mix-blend-mode: var(--blobBlend);
  pointer-events: none;
}

.pch-learn .b1 {
  left: -14%;
  top: 8%;
  background: radial-gradient(circle at 30% 30%, rgba(190, 177, 255, 0.92), rgba(190, 177, 255, 0) 66%);
}

.pch-learn .b2 {
  right: -16%;
  top: 18%;
  background: radial-gradient(circle at 40% 35%, rgba(110, 199, 255, 0.82), rgba(110, 199, 255, 0) 66%);
}

.pch-learn .b3 {
  left: 10%;
  bottom: -24%;
  background: radial-gradient(circle at 40% 40%, rgba(255, 211, 110, 0.78), rgba(255, 211, 110, 0) 66%);
}

.pch-learn .b4 {
  right: 10%;
  bottom: -26%;
  background: radial-gradient(circle at 35% 35%, rgba(255, 127, 176, 0.78), rgba(255, 127, 176, 0) 66%);
}

.pch-learn .deckWrap {
  margin-top: 12px;
  position: relative;
  border-radius: var(--radius);
  min-height: 120vh;
}

.pch-learn .categoryCard {
  position: sticky;
  top: var(--deckTop);
  width: var(--cardW);
  height: var(--catH);
  margin: 0 auto 0;
  padding: 0 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1300;
  border: 1px solid var(--cardBorder);
  border-bottom: none;
  border-radius: 18px 18px 0 0;
  background: var(--cardBg);
  box-shadow: 0 12px 32px rgba(18, 21, 27, 0.12);
}

.pch-learn .categoryCard::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  border-radius: 1px;
  background: color-mix(in srgb, var(--cardBorder) 80%, transparent);
}

.pch-learn .deckSpacer {
  height: calc(var(--cards, 8) * 120vh);
}

.pch-learn .deck {
  position: sticky;
  top: calc(var(--deckTop) + var(--catH) - 2px);
  height: calc(100vh - (var(--deckTop) + var(--catH) + 16px));
  display: grid;
  align-items: center;
  pointer-events: auto;
}

.pch-learn .index {
  position: sticky;
  top: calc(var(--deckTop) + 8px);
  width: var(--cardW);
  margin: 0 auto 8px;
  padding-right: 10px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  align-items: center;
  z-index: 1200;
  pointer-events: auto;
}

.pch-learn .dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  border: 1px solid rgba(16, 17, 20, 0.3);
  background: rgba(16, 17, 20, 0.1);
  opacity: 0.7;
  transition: 0.18s ease;
  cursor: pointer;
}

.pch-learn[data-theme="dark"] .dot {
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.18);
}

.pch-learn .dot.is-on {
  opacity: 1;
  background: rgba(16, 17, 20, 0.82);
}

.pch-learn[data-theme="dark"] .dot.is-on {
  background: rgba(255, 255, 255, 0.92);
}

.pch-learn[data-theme="dark"] .categoryCard::before {
  background: rgba(33, 40, 55, 0.95);
}

.pch-learn .card {
  position: absolute;
  left: 50%;
  top: 0;
  width: var(--cardW);
  transform: translate3d(-50%, 0, 0);
  border-radius: 18px;
  background: var(--cardBg);
  color: var(--cardText);
  border: 1px solid var(--cardBorder);
  box-shadow: var(--shadow);
  overflow: hidden;
  pointer-events: auto;
  will-change: transform, opacity;
  text-decoration: none;
}

.pch-learn .card--group {
  border-style: solid;
  overflow: visible;
}

.pch-learn .card--group .cardInner {
  position: relative;
  padding-top: 16px;
}

.pch-learn .card--topic {
  overflow: visible;
}

.pch-learn .card--topic .cardInner {
  position: relative;
  padding-top: 16px;
}

.pch-learn .cardTabs {
  position: absolute;
  left: 14px;
  top: -27px;
  right: auto;
  display: flex;
  gap: 6px;
  pointer-events: auto;
  z-index: 5;
  flex-wrap: nowrap;
  opacity: 0;
  transform: translateY(2px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.pch-learn .card--group.is-current .cardTabs {
  opacity: 1;
  transform: translateY(0);
}

.pch-learn .cardTab {
  border: 1px solid rgba(16, 17, 20, 0.16);
  border-bottom: none;
  background: rgba(255, 255, 255, 0.92);
  color: rgba(16, 17, 20, 0.78);
  border-radius: 12px 12px 0 0;
  padding: 7px 11px 8px;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  box-shadow: 0 -2px 10px rgba(10, 12, 16, 0.08);
  white-space: nowrap;
  cursor: pointer;
  line-height: 1;
  margin-bottom: -1px;
}

.pch-learn .cardTab.is-active {
  background: var(--cardBg);
  color: rgba(16, 17, 20, 0.92);
  box-shadow: none;
  border-color: var(--cardBorder);
}

.pch-learn[data-theme="dark"] .cardTab {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(21, 27, 39, 0.9);
  color: rgba(255, 255, 255, 0.8);
}

.pch-learn[data-theme="dark"] .cardTab.is-active {
  background: var(--cardBg);
}

.pch-learn .cardInner {
  display: grid;
  grid-template-columns: 1fr;
  padding: 16px;
}

.pch-learn .cardArt {
  position: relative;
  height: var(--artH);
  border-radius: 16px;
  background:
    radial-gradient(520px 260px at 20% 20%, rgba(255, 255, 255, 0.45), transparent 62%),
    radial-gradient(620px 320px at 80% 35%, rgba(255, 255, 255, 0.28), transparent 68%),
    linear-gradient(135deg, var(--a1), var(--a2));
  overflow: hidden;
  border: 1px solid rgba(16, 17, 20, 0.08);
}

.pch-learn[data-theme="dark"] .cardArt {
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.pch-learn .frame {
  position: absolute;
  inset: 16px 16px 98px 16px;
  border-radius: 14px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.18);
  overflow: hidden;
}

.pch-learn[data-theme="dark"] .frame {
  border: 1px solid rgba(255, 255, 255, 0.26);
  background: rgba(0, 0, 0, 0.1);
}

.pch-learn .frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: var(--imgO, 0.92);
}


.pch-learn .frame[data-empty="true"] {
  display: grid;
  place-items: center;
  background:
    linear-gradient(155deg, color-mix(in srgb, var(--a1) 48%, white), color-mix(in srgb, var(--a2) 62%, white)),
    repeating-linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.16) 0 14px,
      rgba(255, 255, 255, 0.04) 14px 28px
    );
  border-color: rgba(255, 255, 255, 0.56);
}

.pch-learn .frame[data-empty="true"] .ph {
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.38);
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(22, 24, 30, 0.7);
  font-size: 12px;
}

.pch-learn .artLabel {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  pointer-events: none;
}

.pch-learn .artLabel .title {
  font-weight: 950;
  letter-spacing: 0.01em;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.22);
}

.pch-learn .artLabel .badge {
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  background: rgba(0, 0, 0, 0.1);
  color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  white-space: nowrap;
}

.pch-learn .cardBody {
  padding: 14px 2px 2px;
}

.pch-learn .cardBody h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
}

.pch-learn .meta {
  margin-top: 10px;
  color: var(--cardMeta);
  line-height: 1.6;
  font-size: 14px;
}

.pch-learn .tags {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pch-learn .tag {
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--tagBorder);
  background: var(--tagBg);
  color: var(--tagFg);
}

.pch-learn .topicList {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pch-learn .topicLink {
  display: inline-flex;
  align-items: center;
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--tagBorder);
  background: var(--tagBg);
  color: var(--tagFg);
  font-size: 12px;
  line-height: 1.2;
  text-decoration: none;
  transition: 0.16s ease;
}

.pch-learn .topicLink:hover {
  transform: translateY(-1px);
  background: color-mix(in srgb, var(--tagBg) 70%, var(--c5));
  color: color-mix(in srgb, var(--ink) 90%, transparent);
}

.pch-learning-page {
  --c1: #beb1ff;
  --c2: #7ef0c6;
  --c3: #ffd36e;
  --c4: #ff7fb0;
  --c5: #6ec7ff;
  --c6: #7dd3fc;
  --c7: #86efac;
  --school-grad: linear-gradient(
    90deg,
    #a9b2ef 0%,
    #7fe9c9 22%,
    #79d9d3 38%,
    #98b9ea 52%,
    #d59ed6 66%,
    #f38daf 80%,
    #f3c56f 100%
  );
}

body.pch-learning-page.light {
  background:
    radial-gradient(1400px 760px at 50% -320px, rgba(168, 206, 235, 0.28), rgba(0, 0, 0, 0) 64%),
    radial-gradient(1000px 560px at 12% -240px, rgba(180, 214, 238, 0.18), rgba(0, 0, 0, 0) 62%),
    #ffffff;
  color: rgba(15, 15, 16, 0.92);
}

/* Keep html canvas in sync with Learn page light mode only. */
html:has(body.pch-learning-page.light) {
  background:
    radial-gradient(1400px 760px at 50% -320px, rgba(168, 206, 235, 0.28), rgba(0, 0, 0, 0) 64%),
    radial-gradient(1000px 560px at 12% -240px, rgba(180, 214, 238, 0.18), rgba(0, 0, 0, 0) 62%),
    #ffffff;
}

body.pch-learning-page.light::before {
  background:
    radial-gradient(1000px 520px at 12% 6%, rgba(139, 92, 246, 0.1), transparent 64%),
    radial-gradient(900px 560px at 86% 10%, rgba(34, 211, 238, 0.08), transparent 62%);
}

body.pch-learning-page.light .site-footer {
  border-top-color: rgba(0, 0, 0, 0.08);
  color: rgba(15, 15, 16, 0.6);
}


.pch-learn .fileTabs {
  position: absolute;
  left: 14px;
  top: -31px;
  width: auto;
  margin: 0;
  padding-left: 0;
  display: flex;
  gap: 6px;
  z-index: 1;
}

.pch-learn .fileTabs.is-single {
  display: none;
}

.pch-learn .fileTab {
  border: 1px solid rgba(16, 17, 20, 0.16);
  border-bottom: 1px solid rgba(16, 17, 20, 0.16);
  background: rgba(255, 255, 255, 0.72);
  color: rgba(16, 17, 20, 0.72);
  border-radius: 12px 12px 0 0;
  padding: 8px 14px 9px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  transform: translateY(1px);
  transition: 0.18s ease;
}

.pch-learn .fileTab.is-active {
  background: rgba(255, 255, 255, 0.98);
  color: rgba(16, 17, 20, 0.92);
  transform: translateY(-1px);
  border-bottom-color: rgba(255, 255, 255, 0.98);
}

.pch-learn[data-theme="dark"] .fileTab {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(21, 27, 39, 0.78);
  color: rgba(255, 255, 255, 0.75);
}

.pch-learn[data-theme="dark"] .fileTab.is-active {
  background: rgba(33, 40, 55, 0.95);
  color: rgba(255, 255, 255, 0.94);
  border-bottom-color: rgba(33, 40, 55, 0.95);
}

.pch-learning-page h1.wp-block-heading:first-of-type {
  font-size: clamp(34px, 9vw, 64px);
  line-height: 0.98;
  font-weight: 950;
  letter-spacing: -0.02em;
}

.pch-school-grad {
  color: #6ec7ff;
  background-image: var(
    --school-grad,
    linear-gradient(
      90deg,
      #a9b2ef 0%,
      #7fe9c9 22%,
      #79d9d3 38%,
      #98b9ea 52%,
      #d59ed6 66%,
      #f38daf 80%,
      #f3c56f 100%
    )
  );
}

@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .pch-school-grad {
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    -webkit-text-fill-color: transparent;
  }
}

@media (max-width: 782px) {
  .pch-learn {
    --deckTop: 72px;
    --catH: 40px;
    --cardW: min(760px, 92vw);
    --artH: 420px;
  }

  .pch-learn .fileTabs {
    left: 8px;
    top: -27px;
    gap: 4px;
  }

  .pch-learn .fileTab {
    padding: 7px 11px 8px;
    font-size: 11px;
  }

  .pch-learn .cardTabs {
    left: 10px;
    top: -26px;
    gap: 4px;
  }

  .pch-learn .index {
    top: calc(var(--deckTop) + 6px);
    padding-right: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pch-learn .blob,
  .pch-learn .fileTab,
  .pch-learn .dot,
  .pch-learn .card {
    animation: none !important;
    transition: none !important;
  }
}