/* ============================================
   ATENA CRYPTO — LEARN
   Learning hub hero, tier tags, lesson grid
   ============================================ */

.learn-hero {
  background: rgba(3,16,30,0.45); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,180,255,0.09); padding: 3rem;
}
.learn-hero h1 {
  font-size: 2.2rem; font-weight: 900; letter-spacing: -0.03em; margin-bottom: 0.5rem;
  background: linear-gradient(140deg,#fff,var(--aqua));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.learn-hero p { color: var(--text-dim); max-width: 520px; }

.learn-tiers { display: flex; gap: 0.7rem; margin-top: 1.5rem; flex-wrap: wrap; }
.learn-tier-tag {
  padding: 0.32rem 1rem; border-radius: 100px; font-family: var(--font-mono); font-size: 0.7rem;
  border: 1px solid rgba(0,180,255,0.14); color: var(--text-dim);
  background: rgba(0,100,160,0.09); backdrop-filter: blur(8px); cursor: pointer;
}
.learn-tier-tag.active-tag {
  background: linear-gradient(135deg,rgba(0,140,200,0.28),rgba(0,212,255,0.18));
  border-color: rgba(0,212,255,0.38); color: var(--aqua-bright);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.09);
}
.learn-tier-tag.locked-tag { opacity: 0.42; cursor: not-allowed; }

.learn-body { padding: 2rem 3rem; }
.module-section { margin-bottom: 2.5rem; }
.module-section-title {
  font-size: 1.05rem; font-weight: 700; margin-bottom: 0.9rem;
  display: flex; align-items: center; gap: 0.7rem; color: var(--text);
}

.tier-pill {
  font-family: var(--font-mono); font-size: 0.6rem; padding: 0.18rem 0.55rem;
  border-radius: 100px; text-transform: uppercase; letter-spacing: 0.08em;
}
.tier-pill.basic  { background: rgba(0,255,180,0.09); color: var(--mint); border: 1px solid rgba(0,255,180,0.22); }
.tier-pill.medium { background: rgba(0,212,255,0.09); color: var(--aqua-bright); border: 1px solid rgba(0,212,255,0.22); }
.tier-pill.advanced { background: rgba(255,77,109,0.09); color: var(--red); border: 1px solid rgba(255,77,109,0.22); }

.lessons-grid { display: grid; grid-template-columns: repeat(auto-fill,minmax(225px,1fr)); gap: 0.85rem; }
.lesson-card {
  background: var(--glass-bg); backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border); border-radius: var(--radius);
  padding: 1rem 1.1rem; cursor: pointer; transition: all 0.2s; position: relative; display: block;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.09);
}
.lesson-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg,transparent,rgba(255,255,255,0.18),transparent);
}
.lesson-card:hover {
  border-color: rgba(0,212,255,0.28); transform: translateY(-2px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.1), 0 8px 24px rgba(0,70,140,0.18);
}
.lesson-card.locked { opacity: 0.38; cursor: not-allowed; pointer-events: none; }
.lesson-icon { font-size: 1.2rem; margin-bottom: 0.42rem; }
.lesson-title { font-size: 0.875rem; font-weight: 700; margin-bottom: 0.2rem; color: var(--text); }
.lesson-desc { font-size: 0.78rem; color: var(--text-dim); }
.lesson-lock { position: absolute; top: 0.7rem; right: 0.7rem; font-size: 0.78rem; opacity: 0.32; }

/* Panel reuse (AI chatbot block) */
.panel {
  background: var(--glass-bg); backdrop-filter: blur(18px) saturate(1.3);
  border: 1px solid var(--glass-border); border-radius: var(--radius-lg);
  padding: 1.2rem; position: relative; overflow: hidden;
  box-shadow: inset 0 1px 0 var(--glass-shine), 0 4px 20px rgba(0,0,0,0.18);
}
.panel::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.18), transparent);
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .learn-body { padding: 1.5rem; }
}

/* Coming-soon lesson cards */
.lesson-card.lesson-soon {
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}
.soon-tag {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-faint);
}