/* ===== Learn nav dropdown ===== */
.site-nav__dropdown {
  position: relative;
}

.site-nav__link--has-menu {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.site-nav__chevron {
  font-size: 0.75rem;
  opacity: 0.7;
  transition: transform var(--transition);
}

.site-nav__dropdown.is-open .site-nav__chevron {
  transform: rotate(180deg);
}

.learn-megamenu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-12px);
  width: min(720px, calc(100vw - 32px));
  padding: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  z-index: 200;
}

.site-nav__dropdown.is-open .learn-megamenu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.learn-megamenu__heading {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 14px;
  text-align: center;
}

.learn-megamenu__grid--scroll {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 4px;
}

.learn-megamenu {
  width: min(800px, calc(100vw - 32px));
}

.learn-megamenu__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.learn-megamenu__card {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  text-decoration: none !important;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
}

.learn-megamenu__card:hover,
.learn-megamenu__card:focus-visible {
  border-color: var(--topic-color, var(--color-primary));
  background: color-mix(in srgb, var(--topic-color, var(--color-primary)) 8%, white);
  transform: translateY(-2px);
}

.learn-megamenu__icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--topic-color, var(--color-primary)) 15%, white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.learn-megamenu__text {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.learn-megamenu__text strong {
  font-size: 0.9375rem;
  color: var(--color-text);
}

.learn-megamenu__text span {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.learn-megamenu__all {
  display: block;
  margin-top: 14px;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none !important;
}

/* ===== Learn hub page ===== */
.learn-hub__intro {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.learn-hub__topics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.learn-topic-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--topic-color, var(--color-primary));
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.learn-topic-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.learn-topic-card__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  text-decoration: none !important;
  padding: 8px;
  margin: -8px -8px 12px;
  border-radius: var(--radius-md);
  transition: background var(--transition);
}

.learn-topic-card__head:hover {
  background: color-mix(in srgb, var(--topic-color, var(--color-primary)) 8%, white);
}

.learn-topic-card__icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.625rem;
}

.learn-topic-card__headtext {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.learn-topic-card__title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--color-text);
}

.learn-topic-card__summary {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.learn-topic-card__parts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.learn-topic-card__parts a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  font-size: 0.9375rem;
  text-decoration: none !important;
  transition: background var(--transition);
}

.learn-topic-card__parts a:hover {
  background: var(--color-primary-light);
}

.learn-topic-card__parts span {
  color: var(--color-text-muted);
  font-size: 0.8125rem;
  margin-right: 6px;
}

/* ===== Article page ===== */
.learn-article {
  max-width: 780px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.learn-article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.learn-article__topic-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.8125rem;
}

.learn-article__title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 12px;
}

.learn-article__subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  line-height: 1.7;
}

.learn-article__byline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
  padding: 12px 0 24px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.learn-article__author {
  font-weight: 600;
  color: var(--color-text);
}

/* 상단: 다른 칼럼(주제) 박스 */
.learn-topic-switcher {
  margin-bottom: 40px;
}

.learn-topic-switcher__label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.learn-topic-switcher__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}

.learn-topic-switcher__box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 8px;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  text-decoration: none !important;
  text-align: center;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  min-height: 88px;
}

.learn-topic-switcher__box:hover {
  transform: translateY(-2px);
}

.learn-topic-switcher__box.is-current {
  border-color: var(--topic-color, var(--color-primary));
  background: color-mix(in srgb, var(--topic-color, var(--color-primary)) 10%, white);
}

.learn-topic-switcher__box-icon {
  font-size: 1.375rem;
}

.learn-topic-switcher__box-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.35;
}

.learn-article__body {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--color-text);
}

.learn-article__body h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary-light);
}

.learn-article__body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 28px 0 12px;
}

.learn-article__body p {
  margin-bottom: 18px;
}

.learn-article__body ul,
.learn-article__body ol {
  margin: 0 0 18px 24px;
}

.learn-article__body li {
  margin-bottom: 8px;
}

.learn-article__body blockquote {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.975rem;
}

.learn-article__body .article-tip {
  margin: 28px 0;
  padding: 20px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-md);
}

.learn-article__body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 0.9375rem;
}

.learn-article__body th,
.learn-article__body td {
  border: 1px solid var(--color-border);
  padding: 10px 14px;
  text-align: left;
}

.learn-article__body th {
  background: var(--color-bg);
  font-weight: 600;
}

.learn-article__body .article-faq {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 2px solid var(--color-border);
}

.learn-article__body .article-faq h2 {
  margin-top: 0;
}
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-primary-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.975rem;
}

.learn-article__body .article-tip {
  margin: 28px 0;
  padding: 20px;
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-md);
}

.learn-article__body .article-tip strong {
  display: block;
  margin-bottom: 8px;
  color: #166534;
}

/* 하단: 같은 칼럼의 다른 편 */
.learn-part-nav {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 2px solid var(--color-border);
}

.learn-part-nav__label {
  text-align: center;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.learn-part-nav__numbers {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

.learn-part-nav__num {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 72px;
  padding: 14px 12px;
  border-radius: var(--radius-md);
  border: 2px solid var(--color-border);
  background: var(--color-surface);
  text-decoration: none !important;
  transition: border-color var(--transition), background var(--transition);
}

.learn-part-nav__num:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.learn-part-nav__num.is-current {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff !important;
}

.learn-part-nav__num-index {
  font-size: 1.25rem;
  font-weight: 800;
  line-height: 1;
}

.learn-part-nav__num-label {
  font-size: 0.6875rem;
  font-weight: 500;
  text-align: center;
  line-height: 1.3;
  max-width: 64px;
  color: inherit;
  opacity: 0.85;
}

.learn-part-nav__num.is-current .learn-part-nav__num-label {
  opacity: 1;
}

.learn-article__cta {
  margin-top: 40px;
  text-align: center;
  padding: 32px 24px;
  background: linear-gradient(135deg, var(--color-primary-light), #ede9fe);
  border-radius: var(--radius-lg);
}

@media (max-width: 900px) {
  .learn-topic-switcher__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .learn-megamenu__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .site-nav__dropdown {
    width: 100%;
  }

  .learn-megamenu {
    position: static;
    transform: none;
    width: 100%;
    margin-top: 8px;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: none;
    box-shadow: none;
    border: none;
    padding: 0 0 12px;
  }

  .site-nav__dropdown.is-open .learn-megamenu {
    display: block;
    transform: none;
  }

  .learn-topic-switcher__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .learn-topic-switcher__grid {
    grid-template-columns: 1fr 1fr;
  }

  .learn-part-nav__num {
    min-width: 60px;
    padding: 12px 8px;
  }
}