* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Header Styles */
header {
    background: rgba(255, 255, 255);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    padding: 0 2rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.white {
    color: white;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.95);
}

.mini-logo {
    height: 50px;
    transition: transform 0.3s ease;
}

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

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #667eea;
    text-decoration: none;
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

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

.nav-link {
    color: #333;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.nav-link:hover, .nav-link.active {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.35);
}

/* Dropdown Styles */
.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    width: max-content;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    margin-top: 0.5rem;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
    font-weight: 400;
}

.dropdown-menu a:hover {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

.dropdown:hover .dropdown-menu {
    display: block;
    animation: fadeInUp 0.3s ease;
}

.dropdown-right .dropdown-menu {
    left: auto;
    right: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Main Content */
main {
    padding-top: 90px;
    min-height: calc(100vh - 120px);
}

.hero-section {
    text-align: center;
    padding: 4rem 2rem;
    margin: 2rem auto;
    max-width: 800px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-section h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-section p {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.cta-button {
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
}

.content-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    margin: 2rem;
    padding: 3rem 2rem;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    scroll-margin-top: 90px;
}

.content-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1.5rem;
    text-align: center;
    position: relative;
}

.content-section h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 2px;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 3rem;
    border-radius: 20px;
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
    position: relative;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close-button {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    color: #aaa;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f1f1f1;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.close-button:hover {
    color: white;
    background: #ff6b6b;
}

.modal-content h2 {
    text-align: center;
    font-size: 2rem;
    color: #333;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid #667eea;
}

.modal-content h3 {
    color: #667eea;
    font-size: 1.3rem;
    margin: 2rem 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

.modal-content p,
.modal-content li {
    line-height: 1.8;
    margin-bottom: 1rem;
    color: #555;
}

.modal-content ol,
.modal-content ul {
    padding-left: 2rem;
    margin-bottom: 1.5rem;
}

/* Footer */
footer {
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 2rem;
    text-align: center;
    backdrop-filter: blur(10px);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: center;
}

.footer-logo {
    width: 150px;
    border-radius: 10px;
}

.footer-info p {
    margin: 0.5rem 0;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 1rem;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        display: none;
    }

    nav.active {
        display: flex;
    }

    .nav-link {
        display: block;
        width: 100%;
        text-align: center;
        margin: 0.25rem 0;
    }

    .nav-item {
        width: 100%;
    }

    .dropdown-menu {
        position: static;
        display: block;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(8px);
        box-shadow: none;
        border-radius: 15px;
        padding: 0.5rem 0;
        margin: 0.5rem auto;
        width: 95%;
        border: none;
        transform: none !important;
        animation: none !important;
    }

    .dropdown-menu a {
        text-align: center;
    }

    .dropdown:hover .dropdown-menu {
        animation: none;
    }

    .hero-section {
        margin: 1rem;
        padding: 2rem 1rem;
    }

    .content-section {
        margin: 1rem;
        padding: 2rem 1rem;
    }

    .modal-content {
        width: 95%;
        padding: 2rem 1rem;
        margin: 10% auto;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 0 1rem;
        height: 60px;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    main {
        padding-top: 80px;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .modal-content {
        padding: 1.5rem 1rem;
    }

    .close-button {
        right: 1rem;
        top: 1rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 2s infinite;
}