/* ============================================================
   LearnWithNMT — lesson.css
   Shared styles for all individual lesson pages.
   Include after ../styles.css on every page in lessons/.
   EDIT: Adjust layout or spacing here; it applies to all 6 pages.
   ============================================================ */

/* ---------- Hero (full-bleed image) ---------- */
.lesson-hero {
  position: relative;
  overflow: hidden;
  background: var(--navy-dark);
}
.lesson-hero-banner {
  position: relative;
  width: 100%;
  height: 78vh;
  min-height: 460px;
  max-height: 720px;
  background: var(--navy-dark);
}
.lesson-hero-banner img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.lesson-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 96px 0 44px;
  background: linear-gradient(180deg, rgba(8,14,36,0.65) 0%, rgba(8,14,36,0) 32%, rgba(8,14,36,0) 58%, rgba(8,14,36,0.78) 100%);
}
.lesson-hero-overlay .container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}
.lesson-hero-cta { text-align: center; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Breadcrumb */
.lesson-breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  flex-wrap: wrap;
}
.lesson-breadcrumb a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  transition: color var(--transition);
}
.lesson-breadcrumb a:hover { color: var(--white); }
.lesson-breadcrumb i { font-size: 0.6rem; }
.lesson-breadcrumb span { color: rgba(255,255,255,0.85); font-weight: 500; }

/* ---------- Overview (split layout) ---------- */
.lesson-overview {
  padding: 96px 0;
  background: var(--white);
}
.lesson-overview-split {
  max-width: 720px;
  margin: 0 auto;
}
.lesson-overview-content h2 { margin-bottom: 20px; }
.lesson-overview-content p {
  font-size: 1rem;
  color: var(--grey-700);
  line-height: 1.8;
  margin-bottom: 18px;
}
.lesson-perfect-label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--navy);
  margin: 28px 0 14px;
}
.lesson-perfect-list {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.lesson-perfect-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--grey-700);
  line-height: 1.5;
}
.lesson-perfect-list li i {
  color: var(--lesson-color, var(--gold));
  font-size: 0.8rem;
  margin-top: 4px;
  flex-shrink: 0;
}

/* ---------- What You Will Learn ---------- */
.lesson-skills {
  padding: 96px 0;
  background: var(--off-white);
}
.lesson-skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.lesson-skill-card {
  background: var(--white);
  border: 1px solid rgba(27,42,107,0.07);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.lesson-skill-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.lesson-skill-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-sm);
  background: rgba(27,42,107,0.06);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
  color: var(--lesson-color, var(--navy));
  margin-bottom: 16px;
}
.lesson-skill-card h4 {
  font-size: 0.95rem;
  margin-bottom: 6px;
  color: var(--navy);
}
.lesson-skill-card p {
  font-size: 0.85rem;
  color: var(--grey-500);
  line-height: 1.6;
}

/* ---------- Lesson Durations ---------- */
.lesson-durations {
  padding: 96px 0;
  background: var(--white);
}
.lesson-durations-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.lesson-duration-card {
  background: var(--off-white);
  border: 2px solid var(--grey-300);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
  position: relative;
}
.lesson-duration-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.lesson-duration-card.featured {
  background: var(--white);
  border-color: var(--lesson-color, var(--navy));
  box-shadow: var(--shadow-md);
}
.duration-badge {
  position: absolute;
  top: -13px; left: 50%;
  transform: translateX(-50%);
  background: var(--lesson-color, var(--navy));
  color: var(--white);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 16px;
  border-radius: 100px;
  white-space: nowrap;
}
.duration-time {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1;
  margin-bottom: 6px;
}
.duration-unit {
  font-size: 0.82rem;
  color: var(--grey-500);
  margin-bottom: 14px;
  display: block;
}
.lesson-duration-card h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}
.lesson-duration-card p {
  font-size: 0.88rem;
  color: var(--grey-500);
  line-height: 1.6;
}

/* ---------- Packages ---------- */
.lesson-packages {
  padding: 96px 0;
  background: var(--off-white);
}
.lesson-packages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 56px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}
.lesson-package-card {
  background: var(--white);
  border: 1px solid rgba(27,42,107,0.09);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}
.lesson-package-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.lesson-package-icon {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(27,42,107,0.07);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  color: var(--lesson-color, var(--navy));
  margin-bottom: 20px;
}
.lesson-package-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}
.lesson-package-card p {
  font-size: 0.92rem;
  color: var(--grey-500);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 24px;
}

/* ---------- CTA ---------- */
.lesson-cta {
  background: linear-gradient(135deg, var(--navy-dark) 0%, var(--navy) 100%);
  padding: 88px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.lesson-cta::before {
  content: '';
  position: absolute;
  width: 440px; height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74,127,212,0.2) 0%, transparent 70%);
  top: -100px; right: -80px;
  pointer-events: none;
}
.lesson-cta-inner {
  position: relative; z-index: 1;
  max-width: 580px; margin: 0 auto;
}
.lesson-cta-tag   { color: var(--gold-light); }
.lesson-cta-inner h2 { color: var(--white); margin-bottom: 14px; }
.lesson-cta-inner p  {
  color: rgba(255,255,255,0.72);
  font-size: 1.05rem;
  margin-bottom: 36px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .lesson-skills-grid { grid-template-columns: repeat(2, 1fr); }
  .lesson-packages-grid { grid-template-columns: 1fr; }
}

/* Mobile: account for 64px fixed header */
@media (max-width: 899px) {
  .lesson-hero-banner { height: 60vh; min-height: 380px; }
  .lesson-hero-overlay { padding: 84px 0 24px; }
  .lesson-overview { padding: 56px 0; }
  .lesson-skills   { padding: 56px 0; }
  .lesson-durations { padding: 56px 0; }
  .lesson-packages  { padding: 56px 0; }
  .lesson-cta       { padding: 56px 0; }
}

@media (max-width: 640px) {
  .lesson-hero-banner { height: 52vh; min-height: 320px; }
  .lesson-hero-overlay { padding: 76px 0 20px; }
  .lesson-skills-grid { grid-template-columns: 1fr; }
  .lesson-durations-grid { grid-template-columns: 1fr; }
  .lesson-packages-grid { max-width: 100%; }
}