:root {
  /* 무채색 그라데이션 */
  --primary-gradient: linear-gradient(135deg, #1a1a1a 0%, #404040 100%);
  --secondary-gradient: linear-gradient(135deg, #2d2d2d 0%, #4a4a4a 100%);
  --accent-gradient: linear-gradient(135deg, #333333 0%, #5a5a5a 100%);
  --light-gradient: linear-gradient(135deg, #e8e8e8 0%, #f5f5f5 100%);
  
  /* 텍스트 컬러 */
  --text-dark: #1a1a1a;
  --text-medium: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --white: #ffffff;
  --light-bg: #f8f9fa;
  --medium-bg: #f0f0f0;
  
  --shadow-light: 0 5px 15px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 10px 40px rgba(0, 0, 0, 0.12);
  --shadow-heavy: 0 20px 60px rgba(0, 0, 0, 0.2);
  
  --border-radius: 12px;
  --transition: all 0.3s ease;
}

.solution-section {
  background: var(--primary-gradient);
  min-height: 80px;
  display: flex;
  align-items: center;
}

.solution-container {
  max-width: 1500px;
  margin: 0 auto;
  padding: 20px 20px;
}

.solution-header {
  text-align: center;
  margin-top: 120px;
  margin-bottom: 140px;
}

.solution-header h1 {
  font-size: 5rem;
  font-weight: 700;
  color: var(--text-medium);
  margin-bottom: 15px;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.solution-header p {
  font-size: 2rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.solution-item {
  background: var(--white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-light);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid var(--medium-bg);
  position: relative;
}

.solution-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-medium);
}

.solution-item:hover .solution-icon img {
  transform: scale(1.1);
}

.solution-icon {
  width: 100%;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--light-gradient);
  border-bottom: 1px solid var(--medium-bg);
}

.solution-icon img {
  max-width: 80px;
  max-height: 80px;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.solution-content {
  padding: 30px 25px;
}

.solution-category {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 6px 12px;
  border-radius: 20px;
  margin-bottom: 15px;
}

.badge-auth {
  background: var(--primary-gradient);
  color: var(--white);
}

.badge-kms {
  background: var(--secondary-gradient);
  color: var(--white);
}

.badge-sso {
  background: var(--accent-gradient);
  color: var(--white);
}

.badge-trust {
  background: linear-gradient(135deg, #404040 0%, #5a5a5a 100%);
  color: var(--white);
}

.solution-name {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-medium);
  margin-bottom: 15px;
  line-height: 1.3;
}

.solution-description {
  font-size: 1rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 20px;
}

.solution-tags {
  margin-bottom: 25px;
}

.solution-tag {
  display: inline-block;
  font-size: 0.85rem;
  color: var(--text-dark);
  background: rgba(26, 26, 26, 0.1);
  padding: 5px 10px;
  border-radius: 12px;
  margin: 2px 5px 2px 0;
  font-weight: 500;
}

.solution-actions {
  text-align: right;
}

.btn-solution-detail {
  display: inline-block;
  background: var(--primary-gradient);
  color: var(--white);
  text-decoration: none;
  padding: 12px 24px;
  border-radius: 25px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: var(--transition);
  box-shadow: var(--shadow-light);
}

.btn-solution-detail:hover {
  color: var(--white);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: var(--shadow-medium);
}

/* Responsive Design */
@media (max-width: 768px) {
  .solution-container {
    padding: 40px 15px;
  }
  
  .solution-header h1 {
    font-size: 2.2rem;
  }
  
  .solutions-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .solution-item {
    margin: 0 10px;
  }
  
  .solution-name {
    font-size: 1.5rem;
  }
  
  .solution-description {
    font-size: 0.95rem;
  }
}