/* ==================== KEY CHALLENGES SECTION ==================== */

.key-challenges-section {
  width: 100%;
  padding: 80px 0;
  background-color: #fff;
  border-top: 1px solid #e5e5e5;
}

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

.challenges-header {
  text-align: center;
  margin-bottom: 60px;
}

.challenges-title {
  font-size: 3.2rem;
  font-weight: 700;
  color: #000;
  margin-bottom: 20px;
  line-height: 1.2;
}

.challenges-subtitle {
  font-size: 1.8rem;
  color: #555;
  line-height: 1.6;
  max-width: 800px;
  margin: 0 auto;
}

.challenges-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 40px;
  justify-items: center;
}

.challenge-item {
  background-color: #fff;
  border: 2px solid #f0f0f0;
  border-radius: 12px;
  padding: 40px 30px;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: 380px;
}

.challenge-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #000, #333);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.challenge-item:hover {
  transform: translateY(-8px);
  border-color: #000;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.challenge-item:hover::before {
  transform: scaleX(1);
}

.challenge-icon {
  width: 80px;
  height: 80px;
  background-color: #f8f8f8;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 30px;
  transition: all 0.3s ease;
}

.challenge-item:hover .challenge-icon {
  background-color: #000;
  transform: scale(1.1);
}

.challenge-icon i {
  font-size: 32px;
  color: #000;
  transition: color 0.3s ease;
}

.challenge-item:hover .challenge-icon i {
  color: #fff;
}

.challenge-content {
  text-align: center;
}

.challenge-title {
  font-size: 2.0rem;
  font-weight: 600;
  color: #000;
  margin-bottom: 15px;
  line-height: 1.3;
}

.challenge-description {
  font-size: 1.6rem;
  color: #666;
  line-height: 1.6;
  margin: 0;
}

/* ==================== RESPONSIVE DESIGN ==================== */

@media (max-width: 1200px) {
  .challenges-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
  }
  
  .challenge-item {
    max-width: 350px;
  }
  
  .challenges-title {
    font-size: 2.8rem;
  }
  
  .challenges-subtitle {
    font-size: 1.6rem;
  }
}

@media (max-width: 992px) {
  .challenges-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 35px;
  }
  
  .challenge-item {
    max-width: 400px;
  }
}

@media (max-width: 768px) {
  .key-challenges-section {
    padding: 60px 0;
  }
  
  .challenges-container {
    padding: 0 15px;
  }
  
  .challenges-header {
    margin-bottom: 40px;
  }
  
  .challenges-title {
    font-size: 2.4rem;
  }
  
  .challenges-subtitle {
    font-size: 1.6rem;
  }
  
  .challenges-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
  }
  
  .challenge-item {
    padding: 30px 25px;
    max-width: 100%;
  }
  
  .challenge-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 25px;
  }
  
  .challenge-icon i {
    font-size: 28px;
  }
  
  .challenge-title {
    font-size: 1.8rem;
  }
  
  .challenge-description {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .key-challenges-section {
    padding: 40px 0;
  }
  
  .challenges-container {
    padding: 0 10px;
  }
  
  .challenges-title {
    font-size: 2.0rem;
  }
  
  .challenges-subtitle {
    font-size: 1.6rem;
  }
  
  .challenges-grid {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  
  .challenge-item {
    padding: 25px 20px;
  }
  
  .challenge-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
  }
  
  .challenge-icon i {
    font-size: 24px;
  }
  
  .challenge-title {
    font-size: 1.6rem;
    margin-bottom: 12px;
  }
  
  .challenge-description {
    font-size: 1.6rem;
  }
}

@media (max-width: 320px) {
  .challenges-container {
    padding: 0 8px;
  }
  
  .challenge-item {
    padding: 20px 15px;
  }
  
  .challenge-icon {
    width: 50px;
    height: 50px;
  }
  
  .challenge-icon i {
    font-size: 20px;
  }
  
  .challenge-title {
    font-size: 1.6rem;
  }
  
  .challenge-description {
    font-size: 1.6rem;
  }
}

/* ==================== ACCESSIBILITY ==================== */

@media (prefers-reduced-motion: reduce) {
  .challenge-item,
  .challenge-icon,
  .challenge-item::before {
    transition: none;
  }
  
  .challenge-item:hover {
    transform: none;
  }
  
  .challenge-item:hover .challenge-icon {
    transform: none;
  }
}

.challenge-item:focus-within {
  outline: 2px solid #000;
  outline-offset: 2px;
}

/* ==================== PRINT STYLES ==================== */

@media print {
  .key-challenges-section {
    padding: 20px 0;
    background-color: transparent;
  }
  
  .challenge-item {
    border: 1px solid #000;
    break-inside: avoid;
    margin-bottom: 20px;
  }
  
  .challenge-icon {
    background-color: transparent;
    border: 1px solid #000;
  }
  
  .challenges-title {
    font-size: 18pt;
  }
  
  .challenge-title {
    font-size: 14pt;
  }
  
  .challenge-description,
  .challenges-subtitle {
    font-size: 12pt;
  }
}