:root {
    --primary-color: #20B2AA; /* Light Sea Green */
    --primary-dark: #008B8B;
    --secondary-color: #FF7F50; /* Coral */
    --text-color: #333333;
    --light-text: #666666;
    --background-color: #F0F8FF; /* Alice Blue */
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
}

.logo .dot {
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-color);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary-color);
}

.hamburger {
    display: none;
    cursor: pointer;
}

.hamburger .line {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 5px;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    position: relative;
    padding-top: 140px;
    padding-bottom: 100px;
    background: linear-gradient(135deg, #E0F7FA 0%, #FFFFFF 100%);
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.hero-content {
    flex: 1;
    z-index: 1;
}

.chip {
    display: inline-block;
    background-color: rgba(32, 178, 170, 0.1);
    color: var(--primary-dark);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: #2c3e50;
}

.hero h1 .highlight {
    color: var(--primary-color);
    position: relative;
    z-index: 0;
}

.hero h1 .highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 15px;
    background-color: rgba(255, 127, 80, 0.2);
    z-index: -1;
    border-radius: 5px;
}

.hero p {
    font-size: 1.1rem;
    color: var(--light-text);
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    display: inline-block;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(32, 178, 170, 0.3);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    position: relative;
}

.image-wrapper {
    width: 400px;
    height: 400px;
    background-color: var(--white);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
    position: relative;
}

.image-wrapper::before {
    content: '';
    position: absolute;
    width: 110%;
    height: 110%;
    border-radius: 50%;
    border: 2px dashed rgba(32, 178, 170, 0.3);
    animation: rotate 20s linear infinite;
}

.placeholder-image i {
    font-size: 8rem;
    color: var(--primary-color);
    opacity: 0.8;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.shape-divider {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
}

.shape-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 80px;
}

.shape-fill {
    fill: var(--white);
}

/* About Section */
.about {
    padding: 80px 0;
    background-color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--light-text);
    margin-bottom: 1rem;
}

.underline {
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 0 auto;
    border-radius: 2px;
}

.about-content {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
}

.about-card {
    flex: 1;
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: var(--transition);
    border: 1px solid #f0f0f0;
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.icon-box {
    width: 80px;
    height: 80px;
    background-color: rgba(32, 178, 170, 0.1);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0 auto 1.5rem;
    transition: var(--transition);
}

.about-card:hover .icon-box {
    background-color: var(--primary-color);
}

.icon-box i {
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.about-card:hover .icon-box i {
    color: var(--white);
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.about-card p {
    color: var(--light-text);
    font-size: 0.95rem;
}

/* Topics Section */
.topics {
    padding: 80px 0;
    background-color: #f9fbfd;
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.topic-item {
    position: relative;
    background: var(--white);
    border-radius: 20px;
    padding: 2rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
}

.topic-item:hover {
    transform: translateY(-5px);
}

.topic-content i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.topic-content h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.topic-content p {
    color: var(--light-text);
    font-size: 0.9rem;
}

/* Blog CTA Section */
.blog-preview {
    padding: 80px 0;
    background-color: var(--white);
}

.blog-cta {
    background: linear-gradient(120deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 30px;
    padding: 4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.cta-content {
    flex: 1;
    z-index: 1;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.btn-white {
    background-color: var(--white);
    color: var(--primary-dark);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-white:hover {
    background-color: #f0f0f0;
    transform: translateY(-2px);
}

.cta-image {
    font-size: 15rem;
    color: rgba(255, 255, 255, 0.1);
    position: absolute;
    right: -2rem;
    bottom: -4rem;
    transform: rotate(-15deg);
}

/* Footer */
footer {
    background-color: #2c3e50;
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    opacity: 0.7;
}

.footer-social a {
    font-size: 1.5rem;
    color: var(--white);
    opacity: 0.8;
    transition: var(--transition);
    margin-left: 1rem;
}

.footer-social a:hover {
    opacity: 1;
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    font-size: 0.9rem;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 968px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }

    .about-content {
        flex-direction: column;
    }
    
    .image-wrapper {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        right: -100%;
        top: 0;
        height: 100vh;
        background-color: var(--white);
        flex-direction: column;
        justify-content: center;
        width: 250px;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
        transition: 0.4s ease;
    }
    
    .nav-links.active {
        right: 0;
    }

    .hamburger {
        display: block;
        z-index: 1001;
    }

    .hamburger.active .line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active .line:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .line:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .blog-cta {
        flex-direction: column;
        text-align: center;
        padding: 3rem;
    }
    
    .cta-image {
        display: none;
    }
}