/* ==========================================
   KHỐI 3 (SECTION WHY US)
   ========================================== */

.section-why-us {
  padding: 80px 0;
  background-color: #f8fafc;
  color: #1e293b;
}

.section-why-us .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section-why-us .section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px auto;
}

.section-why-us .sub-title {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  color: #2563eb;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.section-why-us .main-title {
  font-size: 2.25rem;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.3;
  margin-bottom: 16px;
}

.section-why-us .description {
  font-size: 1rem;
  color: #64748b;
  line-height: 1.6;
}

.section-why-us .why-us-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.section-why-us .why-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  padding: 40px 32px;
  border-radius: 16px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.03);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.section-why-us .why-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.06);
  border-color: #cbd5e1;
}

.section-why-us .card-icon {
  width: 56px;
  height: 56px;
  background-color: #eff6ff;
  color: #2563eb;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
  transition: all 0.3s ease;
}

.section-why-us .why-card:hover .card-icon {
  background-color: #2563eb;
  color: #ffffff;
}

.section-why-us .card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 12px;
  line-height: 1.4;
}

.section-why-us .card-desc {
  font-size: 0.935rem;
  color: #64748b;
  line-height: 1.65;
}

/* Responsive */
@media (max-width: 992px) {
  .section-why-us .why-us-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .section-why-us {
    padding: 50px 0;
  }
  .section-why-us .main-title {
    font-size: 1.75rem;
  }
  .section-why-us .why-us-grid {
    grid-template-columns: 1fr;
  }
  .section-why-us .why-card {
    padding: 30px 24px;
  }
}