.learn {
  background-color: #0d0d0d;
  overflow-x: clip;
}

.learn::before {
  background:
    radial-gradient(ellipse at 80% 8%, rgba(247, 147, 26, 0.16), transparent 42%),
    radial-gradient(ellipse at 12% 70%, rgba(247, 147, 26, 0.06), transparent 40%);
  opacity: 1;
}

.learn::after {
  background: linear-gradient(180deg, rgba(13, 13, 13, 0.35) 0%, rgba(13, 13, 13, 0.55) 100%);
}

.learn-wrap {
  width: min(1440px, calc(100% - 80px));
  margin-inline: auto;
}

@media (max-width: 640px) {
  .learn-wrap { width: min(1440px, calc(100% - 32px)); }
}

.learn-progress {
  position: sticky;
  top: 76px;
  z-index: 40;
  display: flex;
  gap: 2px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding: 8px 4px 10px;
  margin: 0 -4px;
  scrollbar-width: none;
  background: rgba(13, 13, 13, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.learn-progress::-webkit-scrollbar { display: none; }

.learn-progress a,
.learn-progress span {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  padding: 6px 10px;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
}

.learn-progress a:hover {
  color: var(--text);
  text-decoration: none;
}

.learn-progress a.is-active {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.learn-progress .soon {
  opacity: 0.45;
  cursor: default;
}

.learn-hero {
  min-height: calc(100vh - 76px);
  display: grid;
  align-items: center;
  padding: 48px 0 64px;
  position: relative;
}

.learn-hero.in-page {
  min-height: 0;
  padding: 56px 0 48px;
}

.learn-hero h2 {
  margin: 16px 0 18px;
  font-size: clamp(40px, 8vw, 92px);
}

.learn-kicker {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.learn-hero h1 {
  margin: 16px 0 18px;
  font-size: clamp(40px, 8vw, 92px);
  overflow-wrap: anywhere;
}

.learn-lead {
  max-width: 38rem;
  font-size: clamp(20px, 2.2vw, 26px);
  color: var(--text);
  line-height: 1.45;
}

.learn-support {
  max-width: 40rem;
  margin-top: 18px;
  color: var(--muted);
  font-size: 17px;
}

.btc-mark {
  position: absolute;
  right: -1%;
  top: 50%;
  width: min(400px, 40vw);
  aspect-ratio: 1;
  margin: 0;
  border: 0;
  background: transparent;
  pointer-events: auto;
  transform: translateY(-50%);
  filter: drop-shadow(0 16px 12px rgba(0, 0, 0, 0.35));
  animation: coin-drift 9s ease-in-out infinite;
}

a.btc-mark,
a.btc-mark:hover,
a.btc-mark:visited {
  color: inherit;
  text-decoration: none;
}

a.btc-mark {
  cursor: pointer;
}

a.btc-mark:hover,
a.btc-mark:focus-visible {
  animation-play-state: paused;
  filter: drop-shadow(0 18px 14px rgba(0, 0, 0, 0.45)) drop-shadow(0 0 18px rgba(247, 147, 26, 0.85));
}

.btc-hint {
  position: absolute;
  left: 50%;
  bottom: 7%;
  z-index: 3;
  padding: 8px 14px 8px 16px;
  border: 1px solid #f7931a;
  border-radius: 999px;
  background: rgba(14, 14, 14, 0.92);
  color: #f7931a;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1;
  text-transform: uppercase;
  pointer-events: none;
  opacity: 0;
  transform: translateX(-50%) translateY(6px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.btc-hint::after {
  content: " →";
  letter-spacing: 0;
}

a.btc-mark::after {
  content: "";
  position: absolute;
  inset: 3%;
  z-index: 2;
  border-radius: 50%;
  border: 2px solid transparent;
  pointer-events: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

a.btc-mark:hover::after,
a.btc-mark:focus-visible::after {
  border-color: #f7931a;
  box-shadow: 0 0 0 7px rgba(247, 147, 26, 0.16), inset 0 0 0 1px rgba(247, 147, 26, 0.35);
}

a.btc-mark:hover .btc-hint,
a.btc-mark:focus-visible .btc-hint {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

a.btc-mark:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 6px;
  border-radius: 50%;
}

.btc-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: transparent;
}

.btc-mark::before {
  content: "";
  position: absolute;
  inset: 10%;
  border-radius: 50%;
  background: linear-gradient(115deg, transparent 32%, rgba(255, 236, 210, 0.2) 48%, transparent 62%);
  background-size: 220% 100%;
  mix-blend-mode: screen;
  mask-image: radial-gradient(circle, #000 50%, transparent 72%);
  animation: coin-sheen 7.5s ease-in-out infinite;
}

@keyframes coin-drift {
  0%, 100% { transform: translateY(-50%) rotate(-3deg); }
  50% { transform: translateY(calc(-50% - 18px)) rotate(3deg); }
}

@keyframes coin-sheen {
  0%, 100% { background-position: 130% 0; }
  50% { background-position: -30% 0; }
}

@keyframes coin-drift-mobile {
  0%, 100% { transform: translateY(0) rotate(-2.5deg); }
  50% { transform: translateY(-14px) rotate(2.5deg); }
}

.scroll-cue {
  display: inline-flex;
  margin-top: 40px;
  color: var(--muted);
  font-size: 14px;
  letter-spacing: 0.04em;
}

.scroll-cue:hover { color: var(--orange); text-decoration: none; }

.learn-section {
  padding: 72px 0 40px;
}

.learn-section h2 {
  margin: 0 0 12px;
  font-size: clamp(32px, 4.5vw, 52px);
}

.q {
  color: var(--orange);
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.intro {
  max-width: 40rem;
  color: var(--muted);
  margin-bottom: 32px;
}

.prop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

.prop {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 22px;
  min-height: 0;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.prop:hover {
  border-color: rgba(247, 147, 26, 0.45);
  transform: translateY(-2px);
  box-shadow: 0 0 28px rgba(247, 147, 26, 0.08);
}

.prop h3 {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.prop p {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}

.takeaway {
  margin-top: 20px;
  padding: 22px 24px;
  border-radius: 16px;
  border: 1px solid rgba(247, 147, 26, 0.35);
  background: linear-gradient(180deg, rgba(247, 147, 26, 0.08), rgba(22, 22, 22, 0.6));
}

.takeaway strong {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
  margin-bottom: 8px;
}

.takeaway p {
  margin: 0;
  color: var(--text);
  font-size: 17px;
}

.big-q {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(22px, 3vw, 32px);
  color: var(--text);
  line-height: 1.35;
  max-width: 46rem;
  margin: 0 0 28px;
}

.compare {
  display: grid;
  gap: 12px;
}

.compare-col {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
}

.compare-col h3 {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.compare-col.btc h3 { color: var(--orange); }

.flow-node {
  padding: 10px 12px;
  border-radius: 10px;
  background: #111;
  border: 1px solid var(--border);
  font-size: 14px;
}

.flow-arrow {
  color: var(--muted);
  font-size: 12px;
  padding: 6px 4px 6px 18px;
}

.compare-col.btc .flow-arrow { color: var(--orange); }

.steps {
  display: grid;
  gap: 12px;
}

.step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 14px;
  padding: 18px 18px 18px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.step b {
  color: var(--orange);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.step h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.chain {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 22px 0 16px;
  font-size: 11px;
  letter-spacing: 0.06em;
  max-width: 100%;
}

.chain span {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.chain .dot {
  width: 22px;
  height: 1px;
  background: rgba(247, 147, 26, 0.5);
  border: 0;
  padding: 0;
  animation: pulse-line 2.4s ease-in-out infinite;
}

@keyframes pulse-line {
  0%, 100% { opacity: 0.25; }
  50% { opacity: 1; }
}

.giant {
  font-size: clamp(56px, 12vw, 128px) !important;
  margin-bottom: 12px !important;
}

.split-two {
  display: grid;
  gap: 12px;
  margin: 8px 0 24px;
}

.pair {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  margin: 28px 0;
}

.pair-side {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 20px;
  text-align: center;
}

.pair-side.btc {
  border-color: rgba(247, 147, 26, 0.45);
}

.pair-side span {
  display: block;
  letter-spacing: 0.16em;
  font-size: 12px;
  color: var(--muted);
}

.pair-side b {
  display: block;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(48px, 8vw, 72px);
  font-weight: 400;
  color: var(--text);
  line-height: 1.1;
  margin: 8px 0;
}

.pair-side.btc b { color: var(--orange); }

.pair-side small {
  color: var(--muted);
  font-size: 13px;
}

.pair-slash {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: 40px;
  color: var(--muted);
}

.hi { color: var(--text); font-weight: 500; }

.m2-flow {
  max-width: 28rem;
  margin: 8px 0 24px;
}

.m2-node {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 16px;
}

.m2-node b { color: var(--orange); }

.money-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 28px 0 8px;
  border: 1px solid var(--border);
  border-radius: 16px;
}

.money-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 14px;
}

.money-table th,
.money-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.money-table thead th {
  color: var(--orange);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: var(--surface);
}

.money-table tbody th {
  color: var(--muted);
  font-weight: 500;
  width: 18%;
}

.money-table tbody td {
  color: var(--text);
}

.money-table tbody tr:hover td,
.money-table tbody tr:hover th {
  background: rgba(247, 147, 26, 0.06);
}

.myths {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.myth {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
}

.myth summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 18px 20px;
  font-size: 18px;
  color: var(--text);
}

.myth summary::-webkit-details-marker { display: none; }

.myth summary span {
  color: var(--orange);
  font-size: 13px;
  flex: 0 0 auto;
}

.myth[open] summary {
  border-bottom: 1px solid var(--border);
}

.myth-body {
  padding: 8px 20px 22px;
}

.myth-body p {
  color: var(--muted);
}

.plain-list {
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--text);
}

.neq {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}

.neq div {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--text);
}

.neq span {
  color: var(--orange);
  font-size: 22px;
}

.inst-flow { margin: 8px 0 24px; }

.inst-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.inst-grid span {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 14px;
}

.play-grid {
  display: grid;
  gap: 12px;
}

.play {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px 22px 20px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.play:hover {
  border-color: rgba(247, 147, 26, 0.45);
  transform: translateY(-2px);
  box-shadow: 0 0 28px rgba(247, 147, 26, 0.08);
}

.play b {
  color: var(--orange);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.play h3 {
  margin: 8px 0 10px;
  font-size: 20px;
  color: var(--text);
}

.play p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 15px;
}

.play .meta {
  font-size: 13px;
  color: var(--muted);
}

.play .line {
  color: var(--text);
  font-size: 16px;
  margin: 8px 0 0;
}

.chain.tight {
  margin: 12px 0;
}

@media (min-width: 768px) {
  .play-grid { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 1100px) {
  .play-grid { grid-template-columns: 1fr 1fr 1fr; }
}

.so-list {
  list-style: none;
  margin: 28px 0 32px;
  padding: 0;
}

.so-list li {
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(22px, 3.2vw, 36px);
  line-height: 1.3;
  color: var(--text);
  padding: 10px 0;
  opacity: 0;
  transform: translateY(14px);
}

.reveal.is-in .so-list li {
  animation: so-in 0.6s ease forwards;
}

.reveal.is-in .so-list li:nth-child(1) { animation-delay: 0.05s; }
.reveal.is-in .so-list li:nth-child(2) { animation-delay: 0.16s; }
.reveal.is-in .so-list li:nth-child(3) { animation-delay: 0.27s; }
.reveal.is-in .so-list li:nth-child(4) { animation-delay: 0.38s; }
.reveal.is-in .so-list li:nth-child(5) { animation-delay: 0.49s; }
.reveal.is-in .so-list li:nth-child(6) { animation-delay: 0.6s; }
.reveal.is-in .so-list li:nth-child(7) { animation-delay: 0.72s; }

@keyframes so-in {
  to { opacity: 1; transform: none; }
}

@media (min-width: 768px) {
  .prop-grid { grid-template-columns: 1fr 1fr; }
  .compare { grid-template-columns: 1fr 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .split-two { grid-template-columns: 1fr 1fr; }
  .inst-grid { grid-template-columns: repeat(3, 1fr); }
  .learn-hero.in-page { padding-right: 46%; }
}

@media (min-width: 1100px) {
  .prop-grid { grid-template-columns: repeat(4, 1fr); }
  .learn-hero.in-page { padding-right: max(32%, 420px); }
}

@media (max-width: 767px) {
  .btc-mark {
    position: relative;
    right: auto;
    top: auto;
    width: 200px;
    margin: 4px auto 22px;
    transform: none;
    animation-name: coin-drift-mobile;
  }

  .btc-hint {
    opacity: 1;
    transform: translateX(-50%);
  }

  a.btc-mark::after {
    border-color: rgba(247, 147, 26, 0.55);
  }
  .learn-hero { min-height: auto; padding: 36px 0 48px; }
  .learn-progress { top: 76px; }
}

.supply-link {
  display: block;
  max-width: 40rem;
  margin-top: 28px;
  padding: 16px 18px 16px 16px;
  border: 1px solid rgba(247, 147, 26, 0.35);
  border-left: 2px solid var(--orange);
  border-radius: 12px;
  background: rgba(14, 14, 14, 0.55);
  color: inherit;
  text-decoration: none;
}

.supply-link:hover {
  border-color: var(--orange);
  color: inherit;
  text-decoration: none;
}

.supply-link .q { margin: 0; }

.supply-link strong {
  display: block;
  margin-top: 4px;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 400;
  line-height: 1.1;
  color: var(--orange);
}

.supply-link p:last-child {
  margin: 8px 0 0;
  color: var(--muted);
}

@media (prefers-reduced-motion: reduce) {
  .chain .dot,
  .btc-mark,
  .btc-mark::before { animation: none; }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .so-list li,
  .reveal.is-in .so-list li {
    opacity: 1;
    transform: none;
    animation: none;
  }
}