*{margin:0;padding:0;box-sizing:border-box}:root{--primary-color: #1a1a1a;--secondary-color: #2563eb;--text-color: #333333;--text-light: #666666;--bg-color: #ffffff;--bg-light: #f9fafb;--border-color: #e5e7eb;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--max-width: 1200px;--transition: all .3s ease}html{font-size:16px;scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:var(--text-color);background-color:var(--bg-color)}a{color:var(--secondary-color);text-decoration:none;transition:var(--transition)}a:hover{text-decoration:underline}.container{max-width:var(--max-width);margin:0 auto;padding:0 20px}.site-header{background:var(--bg-color);border-bottom:1px solid var(--border-color);position:sticky;top:0;z-index:1000;box-shadow:var(--shadow-sm)}.navbar{padding:1rem 0}.nav-wrapper{display:flex;justify-content:space-between;align-items:center}.logo{font-size:1.5rem;font-weight:700;color:var(--primary-color);text-decoration:none}.nav-menu{display:flex;list-style:none;gap:2rem}.nav-menu a{color:var(--text-color);font-weight:500;padding:.5rem 0;position:relative}.nav-menu a:hover{color:var(--secondary-color);text-decoration:none}.nav-menu a:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--secondary-color);transition:width .3s ease}.nav-menu a:hover:after{width:100%}.menu-toggle{display:none;flex-direction:column;background:none;border:none;cursor:pointer;padding:.5rem;gap:4px}.hamburger{width:25px;height:3px;background:var(--primary-color);transition:var(--transition)}.menu-toggle.active .hamburger:nth-child(1){transform:rotate(45deg) translate(5px,5px)}.menu-toggle.active .hamburger:nth-child(2){opacity:0}.menu-toggle.active .hamburger:nth-child(3){transform:rotate(-45deg) translate(7px,-6px)}.site-footer{background:var(--primary-color);color:#fff;padding:3rem 0 1.5rem;margin-top:4rem}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;margin-bottom:2rem}.footer-section h3{font-size:1.25rem;margin-bottom:1rem}.footer-section p{color:#fffc;line-height:1.6}.footer-section ul{list-style:none}.footer-section ul li{margin-bottom:.5rem}.footer-section a{color:#fffc;transition:var(--transition)}.footer-section a:hover{color:#fff;text-decoration:none}.social-links{display:flex;gap:1rem}.footer-bottom{text-align:center;padding-top:2rem;border-top:1px solid rgba(255,255,255,.1);color:#fff9}@media(max-width:768px){.nav-menu{position:fixed;left:-100%;top:70px;flex-direction:column;background-color:var(--bg-color);width:100%;text-align:center;transition:.3s;box-shadow:0 10px 27px #0000000d;padding:2rem 0;border-top:1px solid var(--border-color)}.nav-menu.active{left:0}.nav-menu li{margin:.5rem 0}.menu-toggle{display:flex}.footer-content{grid-template-columns:1fr;text-align:center}.social-links{justify-content:center}.container{padding:0 15px}.site-footer{padding:2rem 0 1rem}}.about-container{max-width:800px;margin:0 auto;padding:2rem 1.5rem;font-family:Pretendard Variable,-apple-system,BlinkMacSystemFont,system-ui,Roboto,sans-serif;line-height:1.7;color:#1a1a1a}.about-container h1{font-size:2.5rem;font-weight:700;line-height:1.2;margin-bottom:2rem;color:#000}.about-container h2{font-size:1.8rem;font-weight:700;margin-top:2.5rem;margin-bottom:1.5rem;padding-bottom:.75rem;border-bottom:2px solid #e5e5e5;color:#000}.about-container h2:first-of-type{margin-top:0}.about-container h3{font-size:1.3rem;font-weight:600;margin-top:4.5rem;margin-bottom:1.25rem;color:#1a1a1a}.about-container p{font-size:1.1rem;line-height:1.75;margin-bottom:1.5rem;color:#333}.about-container ul,.about-container ol{margin-bottom:1.5rem;padding-left:1.5rem}.about-container li{font-size:1.05rem;line-height:1.7;margin-bottom:.75rem}.about-container strong{font-weight:600;color:#000}.about-container a{color:#06c;text-decoration:none}.about-container a:hover{text-decoration:underline}.about-container hr{border:none;border-top:2px solid #e5e5e5;margin:3rem 0;height:0}.about-container blockquote{font-size:1.2rem;font-style:italic;margin:2rem 0;padding-left:1.5rem;color:#555}.about-container h1+p strong{display:block;font-size:1.3rem;font-weight:600;line-height:1.6;margin-bottom:2.5rem;padding:1.5rem;background:#f8f9fa;color:#1a1a1a}.about-container h3+p{color:#555}.about-container details{margin-bottom:1.5rem;padding:.75rem 1rem;border:1px solid #e5e5e5;border-radius:4px;transition:background-color .2s ease}.about-container details:hover{background-color:#f8f9fa}.about-container summary{font-weight:600;cursor:pointer;color:#1a1a1a}.about-container summary:hover{color:#06c}.about-container li::marker{color:#06c}@media(max-width:768px){.about-container{padding:1.5rem 1rem}.about-container h1{font-size:2rem;margin-bottom:1.5rem}.about-container h2{font-size:1.5rem;margin-top:2rem}.about-container p{font-size:1rem}}