* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            /* scroll-behavior: smooth; */
        }

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f8fafc;
        }

        .header {
            /* background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); */
            background-color: white;
            color: black;
            padding: 0;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            backdrop-filter: blur(10px);
        }

        .header-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 2rem;
            min-height: 80px
        }

        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            display: flex;
            align-items: center;
            /* gap: 0.5rem; */
            transition: transform 0.3s ease;
        }

        .logo:hover {
            transform: scale(1.05);
        }

        .logo-icon {
            width: 60px;
            height: 60px;
            /* background: rgba(255, 255, 255, 0.2); */
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            overflow: hidden;
            flex-shrink: 0;
            margin-top: 3px;
        }

        .logo-a{
            color: inherit; /* 부모 요소의 글자색을 상속받아 파란색을 없앰 */
            text-decoration: none; /* 링크의 밑줄을 없앰 */
        }

        .logo-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 50%;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 2rem;
            align-items: center;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            color: black;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 1rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            display: block;
        }

        .nav-link:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: -5px;
            left: 50%;
            background: white;
            transition: all 0.3s ease;
            transform: translateX(-50%);
        }

        .nav-link:hover::after {
            width: 80%;
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: black;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
        }

        /* 반응형 디자인 - 모바일 */
        @media (max-width: 768px) {
            .header-container {
                padding: 1rem;
            }

            .nav-menu {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                /* background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); */
                background-color: white;
                flex-direction: column;
                gap: 0;
                padding: 1rem 0;
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.3s ease;
                box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            }

            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav-item {
                width: 100%;
                text-align: center;
                padding: 0.5rem 0;
            }

            .nav-link {
                display: block;
                padding: 1rem;
                border-radius: 0;
            }

            .mobile-toggle {
                display: block;
            }
        }