/* ==========================================================================
   Nexus — Learning Center (Bitcoin education hub)
   ========================================================================== */

.learn-page {
  background: var(--nx-white);
}

.learn-page .cr-hero.ln-hero {
  background: url("asset/image/active-trading-bg-crypto-1440.webp") center center / cover no-repeat;
  border-bottom: none;
}

.learn-page .cr-hero.ln-hero .cr-hero__top,
.learn-page .cr-hero.ln-hero .cr-hero__grid,
.learn-page .cr-hero.ln-hero .cr-hero__content {
  background: transparent;
  background-color: transparent;
}

.learn-page .cr-hero.ln-hero .cr-hero__grid {
  grid-template-columns: minmax(0, 1fr);
  min-height: auto;
}

.learn-page .cr-hero.ln-hero .cr-hero__top {
  padding: 24px max(45px, calc((100vw - var(--nx-container)) / 2 + 45px)) 0;
}

.learn-page .cr-hero.ln-hero .cr-hero__content {
  color: var(--nx-white);
  align-items: flex-start;
}

.learn-page .cr-hero.ln-hero .cr-hero__content-inner {
  max-width: 42rem;
  width: 100%;
  margin-left: max(45px, calc((100vw - var(--nx-container)) / 2 + 45px));
  margin-right: auto;
  padding: 0 0 44px;
}

.learn-page .cr-hero.ln-hero .cr-hero__copy h1,
.learn-page .cr-hero.ln-hero #learn-hero-heading {
  font-size: clamp(2rem, 4.5vw, 44px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #ffffff;
  text-shadow: 0 1px 28px rgba(255, 255, 255, 0.1);
  margin-bottom: 0;
}

.learn-page .cr-hero.ln-hero .cr-hero__top .breadcrumb {
  margin-bottom: 20px;
}

.learn-page .cr-hero.ln-hero .cr-hero__top .breadcrumb a {
  color: rgba(255, 255, 255, 0.88);
  font-weight: 600;
}

.learn-page .cr-hero.ln-hero .cr-hero__top .breadcrumb a:hover {
  color: var(--nx-gold);
}

.learn-page .cr-hero.ln-hero .cr-hero__top .breadcrumb [aria-current="page"],
.learn-page .cr-hero.ln-hero .cr-hero__top .breadcrumb span:not(.breadcrumb-sep) {
  color: rgba(255, 255, 255, 0.55);
  font-weight: 500;
}

.learn-page .cr-hero.ln-hero .cr-hero__top .breadcrumb-sep {
  color: rgba(255, 255, 255, 0.38);
}

/* ---- Jump navigation ---- */
.ln-jumpnav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--nx-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.ln-jumpnav__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px 0;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.ln-jumpnav__inner::-webkit-scrollbar {
  display: none;
}

.ln-jumpnav__tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: 0;
}

.ln-jumpnav__tab {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--nx-border);
  background: var(--nx-white);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  color: var(--nx-navy);
  white-space: nowrap;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.ln-jumpnav__tab:hover {
  border-color: var(--nx-navy);
  background: #f4f6f9;
}

.ln-jumpnav__tab.is-active,
.ln-jumpnav__tab[aria-selected="true"] {
  border-color: var(--nx-navy);
  background: var(--nx-navy);
  color: #fff;
}

.ln-jumpnav__tab.is-active:hover,
.ln-jumpnav__tab[aria-selected="true"]:hover {
  background: #0a1a2b;
  border-color: #0a1a2b;
}

.ln-jumpnav__tab:focus-visible {
  outline: 2px solid var(--nx-navy);
  outline-offset: 2px;
}

/* ---- Category tracks ---- */
.ln-tracks {
  background: var(--nx-white);
}

.ln-tracks .container {
  max-width: 1200px;
}

.ln-track {
  padding: 80px 0;
}

.ln-track[hidden] {
  display: none !important;
}

.ln-track__head {
  max-width: 46rem;
  margin-bottom: 44px;
}

.ln-track__head h2 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  color: var(--nx-navy);
}

.ln-track__head p {
  margin: 0;
  font-size: 18px;
  line-height: 1.72;
  color: var(--nx-muted);
}

.ln-article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 24px;
}

.ln-article {
  display: flex;
  flex-direction: column;
  border-radius: var(--nx-radius-lg);
  background: var(--nx-white);
  border: 1px solid var(--nx-border);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.ln-article:hover {
  border-color: rgba(3, 12, 21, 0.22);
  box-shadow: 0 10px 28px rgba(3, 12, 21, 0.07);
}

.ln-article__link {
  display: flex;
  flex-direction: column;
  flex: 1;
  color: inherit;
  text-decoration: none;
}

.ln-article__media {
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #eef2f7;
}

.ln-article__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.ln-article:hover .ln-article__media img {
  transform: scale(1.02);
}

.ln-article__body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 22px 22px 24px;
}

.ln-article__title {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--nx-navy);
  transition: color 0.2s ease;
}

.ln-article__link:hover .ln-article__title {
  color: #0a1a2b;
}

.ln-article__excerpt {
  margin: 0;
  flex: 1;
  font-size: 14px;
  line-height: 1.65;
  color: var(--nx-muted);
}

.ln-article-grid--related {
  margin-top: 0;
}

/* ---- Article detail page ---- */
.learn-article-page {
  background: var(--nx-white);
}

.ln-article-detail__hero {
  padding: 28px 0 40px;
  background: rgb(0 17 53);
  border-bottom: none;
}

.ln-article-detail__hero-inner {
  max-width: 1100px;
}

.ln-article-detail__hero .breadcrumb {
  margin-bottom: 24px;
}

.ln-article-detail__hero .breadcrumb a {
  color: rgba(255, 255, 255, 0.88);
  font-weight: 600;
}

.ln-article-detail__hero .breadcrumb a:hover {
  color: var(--nx-gold);
}

.ln-article-detail__hero .breadcrumb [aria-current="page"],
.ln-article-detail__hero .breadcrumb span:not(.breadcrumb-sep) {
  color: rgba(255, 255, 255, 0.55);
  font-weight: 500;
}

.ln-article-detail__hero .breadcrumb-sep {
  color: rgba(255, 255, 255, 0.38);
}

.ln-article-detail__hero-row {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 40px;
}

.ln-article-detail__hero-copy {
  flex: 1;
  min-width: 0;
}

.ln-article-detail__category {
  margin: 0 0 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.62);
}

.ln-article-detail__title {
  margin: 0 0 16px;
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: #ffffff;
}

.ln-article-detail__dek {
  margin: 0;
  font-size: 1.125rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.78);
}

.ln-article-detail__media {
  flex: 0 0 min(42%, 440px);
  margin: 0;
  border-radius: var(--nx-radius-lg);
  overflow: hidden;
  border: 1px solid var(--nx-border);
  aspect-ratio: 16 / 10;
  background: #eef2f7;
}

.ln-article-detail__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.ln-article-detail__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 48px;
  align-items: start;
  padding: 48px 0 72px;
  max-width: 1100px;
}

.ln-article-detail__content {
  min-width: 0;
}

.ln-article-detail__section {
  margin-bottom: 40px;
}

.ln-article-detail__section:last-child {
  margin-bottom: 0;
}

.ln-article-detail__section h2 {
  margin: 0 0 16px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--nx-navy);
}

.ln-article-detail__section p {
  margin: 0 0 16px;
  font-size: 1.05rem;
  line-height: 1.78;
  color: var(--cr-ink, #1e293b);
}

.ln-article-detail__section p:last-child {
  margin-bottom: 0;
}

.ln-article-detail__aside {
  position: sticky;
  top: 88px;
}

.ln-article-detail__aside-card {
  padding: 24px;
  border-radius: var(--nx-radius-lg);
  border: 1px solid var(--nx-border);
  background: #f7f9fc;
}

.ln-article-detail__aside-label {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--nx-muted);
}

.ln-article-detail__back {
  display: inline-block;
  margin-bottom: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--nx-navy);
  text-decoration: none;
}

.ln-article-detail__back:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.ln-related {
  padding: 0 0 72px;
  background: var(--nx-white);
}

.ln-related__head {
  margin-bottom: 28px;
}

.ln-related__head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--nx-navy);
}

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .ln-article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .ln-article-detail__hero-row {
    flex-direction: column;
    align-items: stretch;
    gap: 28px;
  }

  .ln-article-detail__media {
    flex: none;
    width: 100%;
    max-width: none;
    aspect-ratio: 16 / 9;
  }
}

@media (max-width: 768px) {
  .ln-track {
    padding: 56px 0;
  }

  .ln-article-grid {
    grid-template-columns: 1fr;
  }

  .ln-track__head h2 {
    font-size: 1.75rem;
  }

  .ln-article-detail__layout {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 0 56px;
  }

  .ln-article-detail__aside {
    position: static;
  }

  .ln-article-detail__hero {
    padding: 20px 0 28px;
  }
}

/* ---- Learn CTA band ---- */
.learn-page .ln-cta {
  background: #f7f9fc;
  color: var(--nx-navy);
  border-top: 1px solid var(--nx-border);
  padding: 64px 0 72px;
  text-align: center;
}

.learn-page .ln-cta__inner {
  max-width: 42rem;
}

.learn-page .ln-cta h2 {
  margin: 0 0 14px;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--nx-navy);
}

.learn-page .ln-cta h2 + .ln-cta__actions {
  margin-top: 18px;
}

.learn-page .ln-cta p {
  margin: 0 auto 32px;
  max-width: none;
  font-size: 1.0625rem;
  line-height: 1.72;
  color: var(--nx-muted);
}

.learn-page .ln-cta__actions {
  gap: 14px;
}

.learn-page .ln-cta__btn {
  box-shadow: none;
  font-weight: 600;
  border-radius: 999px;
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease;
}

.learn-page .ln-cta__btn--primary {
  color: var(--nx-white);
  background: var(--nx-navy);
  border: 1px solid var(--nx-navy);
}

.learn-page .ln-cta__btn--primary:hover {
  color: var(--nx-white);
  background: #0a1a2b;
  border-color: #0a1a2b;
  box-shadow: none;
}

.learn-page .ln-cta__btn--secondary {
  color: var(--nx-navy);
  background: var(--nx-white);
  border: 1px solid var(--nx-border);
}

.learn-page .ln-cta__btn--secondary:hover {
  color: var(--nx-navy);
  background: #f4f6f9;
  border-color: var(--nx-navy);
  box-shadow: none;
}

@media (max-width: 768px) {
  .learn-page .ln-cta {
    padding: 52px 0 60px;
  }

  .learn-page .ln-cta__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .learn-page .ln-cta__btn {
    width: 100%;
    justify-content: center;
  }
}

.ln-article-detail__por-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
  color: var(--nx-accent, #0a7cff);
  text-decoration: none;
}

.ln-article-detail__por-link:hover {
  text-decoration: underline;
}