/* SomniCharts Learn Hub — articles + index.
   Reuses the landing.css design tokens (--sc-*). Dark theme to match the site. */

.learn-page {
  padding: 2.5rem 0 4rem;
  color: var(--sc-text, #e6edf3);
  background: var(--sc-dark-bg, #0d1117);
  min-height: 70vh;
}
.learn-page .container { max-width: 1120px; }

/* ---------- Breadcrumb ---------- */
.learn-breadcrumb { margin-bottom: 1.25rem; font-size: 0.85rem; }
.learn-breadcrumb .breadcrumb-item,
.learn-breadcrumb .breadcrumb-item a { color: var(--sc-text-muted, #8b949e); text-decoration: none; }
.learn-breadcrumb .breadcrumb-item a:hover { color: var(--sc-cyan, #00b4d8); }
.learn-breadcrumb .breadcrumb-item.active { color: var(--sc-text, #e6edf3); }
.learn-breadcrumb .breadcrumb-item + .breadcrumb-item::before { color: var(--sc-border, #30363d); }

/* ---------- Article body ---------- */
.learn-article { max-width: 760px; margin: 0 auto; }
.learn-article-head h1 {
  font-size: 2.1rem; line-height: 1.2; font-weight: 800; margin-bottom: 0.6rem;
  background: var(--sc-accent-gradient, linear-gradient(135deg, #00b4d8, #2196F3));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.learn-meta { color: var(--sc-text-muted, #8b949e); font-size: 0.85rem; margin-bottom: 1rem; }
.learn-meta-dot { margin: 0 0.5rem; opacity: 0.5; }
.learn-lede { font-size: 1.12rem; line-height: 1.6; color: #c7d2dd; margin-bottom: 1.5rem; }

.learn-body { font-size: 1.02rem; line-height: 1.78; color: var(--sc-text, #e6edf3); }
.learn-body h2 {
  font-size: 1.5rem; font-weight: 700; margin: 2.2rem 0 0.8rem;
  padding-bottom: 0.35rem; border-bottom: 1px solid var(--sc-border, #30363d);
}
.learn-body h3 { font-size: 1.18rem; font-weight: 650; margin: 1.6rem 0 0.6rem; color: #dbe5ee; }
.learn-body p { margin-bottom: 1.05rem; }
.learn-body ul, .learn-body ol { margin: 0 0 1.05rem 1.25rem; }
.learn-body li { margin-bottom: 0.45rem; }
.learn-body a { color: var(--sc-cyan, #00b4d8); text-decoration: underline; text-underline-offset: 2px; }
.learn-body a:hover { color: var(--sc-blue, #2196F3); }
.learn-body strong { color: #fff; }
.learn-body blockquote {
  border-left: 3px solid var(--sc-cyan, #00b4d8); margin: 1.2rem 0; padding: 0.4rem 1rem;
  background: var(--sc-card-bg, #161b22); border-radius: 6px; color: #c7d2dd;
}
.learn-body code {
  background: var(--sc-card-bg, #161b22); padding: 0.12em 0.4em; border-radius: 5px;
  font-size: 0.9em; color: #ffd9a0;
}
.learn-body pre {
  background: var(--sc-card-bg, #161b22); border: 1px solid var(--sc-border, #30363d);
  padding: 1rem; border-radius: 8px; overflow-x: auto; margin-bottom: 1.2rem;
}
.learn-body pre code { background: none; padding: 0; color: #e6edf3; }
.learn-body table {
  width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: 0.95rem;
}
.learn-body th, .learn-body td {
  border: 1px solid var(--sc-border, #30363d); padding: 0.55rem 0.7rem; text-align: left;
}
.learn-body th { background: var(--sc-card-bg, #161b22); color: #fff; }
.learn-body img { max-width: 100%; height: auto; border-radius: 8px; margin: 1.2rem 0; }

/* ---------- Inline CTA ---------- */
.learn-cta-inline {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1rem; align-items: center;
  justify-content: space-between; background: var(--sc-card-bg, #161b22);
  border: 1px solid var(--sc-border, #30363d); border-left: 3px solid var(--sc-cyan, #00b4d8);
  border-radius: 8px; padding: 0.85rem 1.1rem; margin: 0 0 1.8rem;
  font-size: 0.95rem; color: #c7d2dd;
}
.learn-cta-inline-link { white-space: nowrap; font-weight: 600; color: var(--sc-cyan, #00b4d8); text-decoration: none; }
.learn-cta-inline-link:hover { color: var(--sc-blue, #2196F3); }

/* ---------- FAQ ---------- */
.learn-faq { margin-top: 2.4rem; }
.learn-faq h2 { font-size: 1.5rem; margin-bottom: 1rem; }
.learn-faq-item {
  border: 1px solid var(--sc-border, #30363d); border-radius: 8px;
  padding: 0.9rem 1.1rem; margin-bottom: 0.75rem; background: var(--sc-card-bg, #161b22);
}
.learn-faq-item h3 { font-size: 1.05rem; margin: 0 0 0.4rem; color: #fff; }
.learn-faq-item p { margin: 0; color: #c7d2dd; }

/* ---------- Big conversion CTA ---------- */
.learn-cta-block {
  margin: 2.6rem 0 1.5rem; padding: 2rem 1.5rem; text-align: center; border-radius: 14px;
  background: linear-gradient(135deg, rgba(0,180,216,0.14), rgba(33,150,243,0.14));
  border: 1px solid rgba(0,180,216,0.35);
}
.learn-cta-block h2 { font-size: 1.55rem; font-weight: 750; margin-bottom: 0.6rem; border: 0; }
.learn-cta-block p { color: #c7d2dd; max-width: 560px; margin: 0 auto 1.2rem; }
.learn-cta-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; justify-content: center; }
.learn-cta-fine { font-size: 0.82rem; color: var(--sc-text-muted, #8b949e); margin-top: 0.9rem; margin-bottom: 0; }

.btn-learn-primary {
  background: var(--sc-accent-gradient, linear-gradient(135deg, #00b4d8, #2196F3));
  color: #fff !important; border: 0; font-weight: 650; padding: 0.7rem 1.6rem;
  box-shadow: 0 6px 18px rgba(0,180,216,0.28);
}
.btn-learn-primary:hover { filter: brightness(1.08); color: #fff; }
.btn-learn-ghost {
  background: transparent; color: var(--sc-text, #e6edf3) !important;
  border: 1px solid var(--sc-border, #30363d); font-weight: 600; padding: 0.7rem 1.4rem;
}
.btn-learn-ghost:hover { border-color: var(--sc-cyan, #00b4d8); color: #fff; }

/* ---------- Sources / related / disclaimer ---------- */
.learn-sources { margin-top: 2.2rem; }
.learn-sources h2 { font-size: 1.3rem; margin-bottom: 0.6rem; }
.learn-sources ol { margin-left: 1.1rem; color: var(--sc-text-muted, #8b949e); font-size: 0.9rem; }
.learn-sources a { color: var(--sc-text-muted, #8b949e); }
.learn-sources a:hover { color: var(--sc-cyan, #00b4d8); }

.learn-related { margin-top: 2.4rem; }
.learn-related h2 { font-size: 1.4rem; margin-bottom: 1rem; }
.learn-related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0.9rem; }
.learn-related-card {
  display: flex; flex-direction: column; gap: 0.3rem; padding: 1rem 1.1rem;
  background: var(--sc-card-bg, #161b22); border: 1px solid var(--sc-border, #30363d);
  border-radius: 10px; text-decoration: none; transition: border-color .15s, transform .15s;
}
.learn-related-card:hover { border-color: var(--sc-cyan, #00b4d8); transform: translateY(-2px); }
.learn-related-title { font-weight: 650; color: #fff; }
.learn-related-desc { font-size: 0.85rem; color: var(--sc-text-muted, #8b949e); line-height: 1.45; }

.learn-disclaimer {
  margin-top: 2.4rem; padding-top: 1.2rem; border-top: 1px solid var(--sc-border, #30363d);
  font-size: 0.85rem; color: var(--sc-text-muted, #8b949e);
}
.learn-disclaimer a { color: var(--sc-text-muted, #8b949e); text-decoration: underline; }
.learn-back { margin-top: 1.2rem; }
.learn-back a { color: var(--sc-cyan, #00b4d8); text-decoration: none; }

/* ---------- Hub index ---------- */
.learn-hub-hero { text-align: center; max-width: 760px; margin: 0 auto 3rem; }
.learn-eyebrow {
  text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.78rem; font-weight: 700;
  color: var(--sc-cyan, #00b4d8); margin-bottom: 0.6rem;
}
.learn-hub-hero h1 {
  font-size: 2.4rem; font-weight: 800; line-height: 1.15; margin-bottom: 0.8rem;
  background: var(--sc-accent-gradient, linear-gradient(135deg, #00b4d8, #2196F3));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.learn-hub-sub { font-size: 1.1rem; color: #c7d2dd; line-height: 1.6; margin-bottom: 1.5rem; }
.learn-hub-cta { display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
.learn-hub-cta-fine { font-size: 0.85rem; color: var(--sc-text-muted, #8b949e); }

.learn-pillar { margin-bottom: 3rem; }
.learn-pillar-head { margin-bottom: 1.1rem; }
.learn-pillar-head h2 { font-size: 1.7rem; font-weight: 750; margin-bottom: 0.3rem; }
.learn-pillar-head h2 a { color: #fff; text-decoration: none; }
.learn-pillar-head h2 a:hover { color: var(--sc-cyan, #00b4d8); }
.learn-pillar-desc { color: var(--sc-text-muted, #8b949e); max-width: 720px; }

.learn-card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; }
.learn-card {
  display: flex; flex-direction: column; gap: 0.4rem; padding: 1.2rem 1.25rem;
  background: var(--sc-card-bg, #161b22); border: 1px solid var(--sc-border, #30363d);
  border-radius: 12px; text-decoration: none; transition: border-color .15s, transform .15s, box-shadow .15s;
}
.learn-card:hover { border-color: var(--sc-cyan, #00b4d8); transform: translateY(-3px); box-shadow: 0 10px 26px rgba(0,0,0,0.35); }
.learn-card-title { font-weight: 700; font-size: 1.05rem; color: #fff; line-height: 1.3; }
.learn-card-desc { font-size: 0.9rem; color: var(--sc-text-muted, #8b949e); line-height: 1.5; flex-grow: 1; }
.learn-card-meta { font-size: 0.78rem; color: var(--sc-text-muted, #8b949e); }
.learn-card-go { font-size: 0.85rem; font-weight: 650; color: var(--sc-cyan, #00b4d8); }
.learn-card--pillar {
  background: linear-gradient(135deg, rgba(0,180,216,0.12), rgba(33,150,243,0.10));
  border-color: rgba(0,180,216,0.4);
}
.learn-card-badge {
  align-self: flex-start; font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.06em; color: #06222b; background: var(--sc-cyan, #00b4d8);
  padding: 0.12rem 0.5rem; border-radius: 20px;
}
.learn-empty { text-align: center; color: var(--sc-text-muted, #8b949e); padding: 3rem 0; }

@media (max-width: 600px) {
  .learn-article-head h1 { font-size: 1.7rem; }
  .learn-hub-hero h1 { font-size: 1.9rem; }
  .learn-cta-inline { flex-direction: column; align-items: flex-start; }
}