/* ===== TOP HERO SPLIT (Inspired by Reference) ===== */
.hero-split {
  background: var(--white);
  width: 100%;
  overflow: hidden;
}

.hero-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  min-height: 640px;
  align-items: center;
}

.hero-left {
  flex: 1;
  padding: 60px 32px 60px 80px;
  z-index: 10;
}

.hero-text-content {
  max-width: 520px;
  animation: slideInLeft 0.8s ease-out forwards;
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

.hero-pre-title {
  font-family: var(--ff-heading);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--ink-mid);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.hero-pre-title::before {
  content: "";
  width: 30px;
  height: 2px;
  background: var(--blue);
}

.hero-title {
  font-family: var(--ff-heading);
  font-size: clamp(48px, 5.5vw, 76px);
  font-weight: 800;
  line-height: 1.05;
  color: var(--navy);
  letter-spacing: -0.02em;
  margin-bottom: 32px;
}

.hero-title .highlight {
  position: relative;
  display: inline-block;
  color: var(--navy);
  z-index: 1;
}

.hero-title .highlight::after {
  content: "";
  position: absolute;
  left: -2%;
  bottom: 8%;
  width: 104%;
  height: 35%;
  background: var(--blue-pale);
  z-index: -1;
  opacity: 0.7;
}

.hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-light);
  margin-bottom: 44px;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 15px;
  padding: 18px 36px;
  background: #ffb800; /* Yellow from sample */
  color: var(--navy);
  text-decoration: none;
  font-family: var(--ff-heading);
  font-weight: 700;
  font-size: 15px;
  border-radius: 6px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 15px rgba(255, 184, 0, 0.2);
}

.hero-cta:hover {
  background: #f0ae00;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 184, 0, 0.35);
}

.hero-cta .arrow {
  display: inline-block;
  transition: transform 0.25s;
}
.hero-cta:hover .arrow {
  transform: translateX(5px);
}

/* Right Slideshow Side */
.hero-right {
  flex: 1.2;
  position: relative;
  height: 640px;
}

.hero-slideshow-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}

.hero-slide.active {
  opacity: 1;
}

.hero-decor-box {
  position: absolute;
  top: 60px;
  right: 60px;
  width: 640px; /* Specific from sample look */
  height: 80px;
  z-index: 20;
}
/* Let's refine the decor items to match the sample image exactly */
.hero-decor-box {
  position: absolute;
  top: 100px;
  right: -20px;
  width: 60px;
  height: 100px;
  background: var(--navy-mid);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-heading);
  font-size: 16px;
  font-weight: 700;
  z-index: 20;
}

.hero-decor-bar {
  position: absolute;
  bottom: 0px;
  right: 140px;
  width: 440px;
  height: 110px;
  background: #002b4d;
  z-index: 15;
}

/* Home Sections */
.home-section { padding: 80px 0; }

/* LECTURE Promotion Banner */
.lecture-promo-section {
  background: var(--navy);
  color: var(--white);
  padding: 40px 0;
  position: relative;
  overflow: hidden;
}

.lecture-promo-section::before {
  content: "";
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 40%),
              radial-gradient(circle at 90% 80%, rgba(99, 102, 241, 0.1) 0%, transparent 40%);
  pointer-events: none;
}

.lecture-promo-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  gap: 40px;
}

.lecture-promo-content {
  flex: 1;
}

.lecture-promo-badge {
  display: inline-block;
  background: #6366f1;
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 40px;
  margin-bottom: 20px;
  letter-spacing: 0.1em;
}

.lecture-promo-title {
  font-family: var(--ff-heading);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 8px;
}

.lecture-promo-desc {
  font-size: 14px;
  opacity: 0.8;
  line-height: 1.6;
  max-width: 800px;
}

.lecture-promo-link-box {
  flex-shrink: 0;
}

.lecture-promo-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  color: var(--white);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s;
  backdrop-filter: blur(10px);
}

.lecture-promo-btn:hover {
  background: var(--white);
  color: var(--navy);
  border-color: var(--white);
  transform: translateY(-2px);
}

.lecture-promo-btn .arrow {
  transition: transform 0.3s;
}

.lecture-promo-btn:hover .arrow {
  transform: translateX(5px);
}

@media (max-width: 768px) {
  .lecture-promo-inner {
    flex-direction: column;
    text-align: center;
    gap: 30px;
  }
  .lecture-promo-title { font-size: 20px; }
  .lecture-promo-desc { font-size: 13px; }
  .lecture-promo-btn { width: 100%; justify-content: center; }
}

@media (max-width: 1024px) {
  .hero-inner { flex-direction: column; }
  .hero-left { padding: 60px 32px; width: 100%; }
  .hero-right { width: 100%; height: 400px; }
  .hero-decor-bar { width: 200px; height: 60px; right: 20px; }
}