/* 기본 설정 */
:root {
  --primary-color: #2C3E50;
  --secondary-color: #3498DB;
  --accent-color: #27AE60;
  --text-color: #2C3E50;
  --light-gray: #F5F6FA;
  --dark-gray: #34495E;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Noto Sans KR', sans-serif;
}

body {
  background-color: var(--light-gray);
  color: var(--text-color);
  line-height: 1.6;
}

/* 스크롤 진행바 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(to right, var(--accent-color), var(--secondary-color));
  z-index: 9999;
  transition: width 0.2s ease;
}

/* 헤더 스타일 */
.header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  font-size: 1.5rem;
}

.logo-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-menu a:hover {
  color: var(--secondary-color);
}

.cta-button {
  background: linear-gradient(45deg, var(--secondary-color), var(--accent-color));
  color: white !important;
  padding: 0.5rem 1.5rem;
  border-radius: 25px;
  transition: transform 0.3s ease !important;
}

.cta-button:hover {
  transform: translateY(-2px);
}

/* 메인 콘텐츠 */
.main-content {
  margin-top: 80px;
  padding: 2rem;
  max-width: 1200px;
  margin: 80px auto 0;
}

/* 섹션 스타일 */
section {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  margin: 2rem 0;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease;
}

section:hover {
  transform: translateY(-5px);
}

/* 카드 스타일 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

/* 데이터 시각화 섹션 */
.chart-container {
  background: white;
  border-radius: 12px;
  padding: 1.5rem;
  margin: 2rem 0;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

/* 푸터 스타일 */
.footer {
  background: var(--primary-color);
  color: white;
  padding: 3rem 0 1rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  color: var(--secondary-color);
}

.footer-section a {
  color: white;
  text-decoration: none;
  display: block;
  margin: 0.5rem 0;
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: var(--secondary-color);
}

.footer-bottom {
  text-align: center;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 반응형 디자인 */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }

  .nav-menu {
    flex-direction: column;
    gap: 1rem;
  }

  .main-content {
    padding: 1rem;
  }
}