/* CalculatorInvest Learn Center
   Lightweight, evergreen educational layout. Reuses global tokens from style.css. */

/* Breadcrumb */
.learn-breadcrumb {
  font-size: 0.875rem;
  color: var(--color-text-muted, #64748b);
  margin: 0 0 14px;
}
.learn-breadcrumb a {
  color: var(--color-text-muted, #64748b);
  text-decoration: none;
}
.learn-breadcrumb a:hover {
  color: var(--color-link, #2563eb);
}

/* Hero */
.learn-hero {
  margin: 0 0 8px;
}
.learn-hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-primary, #2563eb);
  margin: 0 0 8px;
}
.learn-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.4rem);
  line-height: 1.12;
  font-weight: 800;
  margin: 0 0 12px;
}
.learn-hero__intro {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-text-muted, #475569);
  max-width: 70ch;
  margin: 0 0 14px;
}

.learn-hero .author-byline--stacked {
  margin-top: 0.25rem;
}

/* Section headings */
.learn-section {
  margin-top: 40px;
}
.learn-section__title {
  font-size: 1.25rem;
  font-weight: 750;
  margin: 0 0 16px;
}

/* Category card grid */
.learn-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.learn-cat-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: 14px;
  background: var(--color-surface, #fff);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.learn-cat-card:hover {
  border-color: var(--color-primary, #2563eb);
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.07);
  transform: translateY(-2px);
}
.learn-cat-card__icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--color-bg-subtle, #f1f5f9);
  color: var(--color-primary, #2563eb);
}
.learn-cat-card__icon svg {
  width: 22px;
  height: 22px;
}
.learn-cat-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 0;
}
.learn-cat-card__desc {
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-text-muted, #64748b);
  margin: 0;
}
.learn-cat-card__more {
  margin-top: auto;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-link, #2563eb);
}

/* Article card list */
.learn-article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}
.learn-article-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: 14px;
  background: var(--color-surface, #fff);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.learn-article-card:hover {
  border-color: var(--color-primary, #2563eb);
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.07);
  transform: translateY(-2px);
}
.learn-article-card__cat {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary, #2563eb);
}
.learn-article-card__title {
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.3;
  margin: 0;
}
.learn-article-card__desc {
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--color-text-muted, #64748b);
  margin: 0;
}

/* Article layout */
.learn-article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
@media (min-width: 960px) {
  .learn-article-layout {
    grid-template-columns: minmax(0, 1fr) 248px;
  }
  .learn-toc {
    position: sticky;
    top: 90px;
    order: 2;
  }
  .learn-article-main {
    order: 1;
  }
}

/* Table of contents */
.learn-toc {
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: 12px;
  padding: 16px 18px;
  background: var(--color-surface, #fff);
  font-size: 0.9rem;
}
.learn-toc__title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
  color: var(--color-text-muted, #64748b);
  margin: 0 0 10px;
}
.learn-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.learn-toc a {
  color: var(--color-text, #334155);
  text-decoration: none;
}
.learn-toc a:hover {
  color: var(--color-link, #2563eb);
}
.learn-toc li {
  border-left: 2px solid transparent;
  margin-left: -10px;
  padding-left: 8px;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.learn-toc a.is-active {
  color: var(--color-link, #2563eb);
  font-weight: 600;
}
.learn-toc li:has(a.is-active) {
  border-left-color: var(--color-link, #2563eb);
}

/* Author byline (article) */
.learn-byline {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  margin: 4px 0 18px;
  border-top: 1px solid var(--color-border, #e5e7eb);
  border-bottom: 1px solid var(--color-border, #e5e7eb);
}
.learn-byline__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1.5px solid rgba(148, 163, 184, 0.45);
}
.learn-byline__text {
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--color-text-muted, #475569);
}
.learn-byline__name {
  font-weight: 700;
  color: var(--color-text, #0f172a);
  text-decoration: none;
}
.learn-byline__name:hover {
  color: var(--color-link, #2563eb);
}
.learn-byline__meta a {
  color: var(--color-link, #2563eb);
  text-decoration: none;
}
.learn-byline__meta a:hover {
  text-decoration: underline;
}

.learn-byline__trust-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.5rem 0 0.35rem;
}

.learn-byline__trust-links .author-byline__link {
  padding: 0.35rem 0.65rem;
  border-radius: 8px;
  background: var(--color-bg-subtle, #f8fafc);
  border: 1px solid var(--color-border, #e5e7eb);
  font-size: 0.8125rem;
  line-height: 1.2;
}

.learn-byline__trust-links .author-byline__link:hover {
  text-decoration: none;
  border-color: var(--color-primary, #2563eb);
  background: rgba(37, 99, 235, 0.06);
}

.learn-byline__updated {
  display: block;
  margin-top: 2px;
  font-size: 0.8125rem;
  color: var(--color-text-muted, #94a3b8);
}

/* Prose */
.learn-prose {
  font-size: 1.0312rem;
  line-height: 1.7;
  color: var(--color-text, #1f2937);
}
.learn-prose h2 {
  font-size: 1.375rem;
  font-weight: 750;
  margin: 34px 0 12px;
  scroll-margin-top: 90px;
}
.learn-prose p {
  margin: 0 0 14px;
}
.learn-prose ul {
  margin: 0 0 14px;
  padding-left: 1.25rem;
}
.learn-prose li {
  margin-bottom: 6px;
}
.learn-prose a {
  color: var(--color-link, #2563eb);
}
.learn-prose code {
  background: var(--color-bg-subtle, #f1f5f9);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 0.9375em;
}

/* Disclaimer block */
.learn-disclaimer {
  margin: 28px 0;
  padding: 14px 16px;
  border: 1px solid var(--color-border, #e5e7eb);
  border-left: 3px solid var(--color-primary, #2563eb);
  border-radius: 8px;
  background: var(--color-bg-subtle, #f8fafc);
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--color-text-muted, #475569);
}

/* Related blocks */
.learn-related {
  margin-top: 28px;
}
.learn-related__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 0 0 12px;
}
.learn-related-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}
.learn-related-list a {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: 10px;
  background: var(--color-surface, #fff);
  text-decoration: none;
  color: var(--color-text, #0f172a);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: border-color 0.15s, color 0.15s;
}
.learn-related-list a:hover {
  border-color: var(--color-primary, #2563eb);
  color: var(--color-link, #2563eb);
}
.learn-related-list a .learn-related-list__desc {
  display: block;
  margin-top: 3px;
  font-weight: 400;
  font-size: 0.8125rem;
  color: var(--color-text-muted, #64748b);
}

/* FAQ */
.learn-faq {
  margin-top: 32px;
}
.learn-faq__title {
  font-size: 1.375rem;
  font-weight: 750;
  margin: 0 0 14px;
}
.learn-faq details {
  border: 1px solid var(--color-border, #e5e7eb);
  border-radius: 10px;
  padding: 0 16px;
  margin-bottom: 10px;
  background: var(--color-surface, #fff);
}
.learn-faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: 14px 0;
  list-style: none;
}
.learn-faq summary::-webkit-details-marker {
  display: none;
}
.learn-faq details[open] summary {
  border-bottom: 1px solid var(--color-border, #eef2f7);
}
.learn-faq__answer {
  padding: 12px 0 16px;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-muted, #475569);
}

/* Empty-state note (categories without dedicated guides yet) */
.learn-note {
  padding: 16px 18px;
  border: 1px dashed var(--color-border, #cbd5e1);
  border-radius: 12px;
  color: var(--color-text-muted, #64748b);
  font-size: 0.9375rem;
}