/* 시스템 폰트 강제 적용 (제로 오버헤드) */
:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: #333333;
  background-color: #FFFFFF;
}

body { margin: 0; padding: 0; }
.container { max-width: 1000px; margin: 0 auto; padding: 0 20px; }
.text-center { text-align: center; }

/* 네비게이션 바 */
.site-header { border-bottom: 1px solid #EAEAEA; padding: 15px 0; }
.nav-bar { position: relative; display: flex; justify-content: flex-end; align-items: center; min-height: 40px; }
.nav-bar a { text-decoration: none; color: #333; font-weight: 500; margin-left: 20px; }
.logo { position: absolute; left: 50%; transform: translateX(-50%); }
.logo a { font-size: 1.5rem; font-weight: bold; margin-left: 0; white-space: nowrap; }

/* 히어로 섹션 (메인 화면) */
.hero-section { padding: 100px 0; }
.hero-title { font-size: 3rem; margin-bottom: 20px; line-height: 1.3; }
.hero-subtitle { font-size: 1.2rem; color: #666; margin-bottom: 40px; }

/* 버튼 스타일 */
.btn { padding: 12px 24px; text-decoration: none; border-radius: 6px; font-weight: bold; margin: 0 10px; }
.btn-primary { background-color: #000000; color: #FFFFFF; }
.btn-outline { border: 2px solid #000000; color: #000000; }

.site-footer { padding: 40px 0; font-size: 0.9rem; color: #888; border-top: 1px solid #EAEAEA; margin-top: 50px; }