/* [Fonts - Keep Existing] */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.8/dist/web/static/pretendard.css');

@font-face {
    font-family: 'GmarketSans';
    font-weight: 300;
    src: url('https://cdn.jsdelivr.net/gh/webfontworld/gmarket/GmarketSansLight.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'GmarketSans';
    font-weight: 500;
    src: url('https://cdn.jsdelivr.net/gh/webfontworld/gmarket/GmarketSansMedium.woff2') format('woff2');
    font-display: swap;
}
@font-face {
    font-family: 'GmarketSans';
    font-weight: 700;
    src: url('https://cdn.jsdelivr.net/gh/webfontworld/gmarket/GmarketSansBold.woff2') format('woff2');
    font-display: swap;
}

:root {
    --font-main: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    --font-accent: 'GmarketSans', sans-serif;
    
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-100: #f8f8f8;
    --color-gray-200: #eeeeee;
    --color-gray-400: #aaaaaa;
    --color-gray-600: #666666;
    --color-primary: #f7e159; /* Plymouth Yellow */
    --color-secondary: #46a5ff; /* Plymouth Blue */
    
    --header-height: 80px;
    --container-width: 1200px;
}

/* [Base Reset] */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-accent), var(--font-main); /* GmarketSans first for Korean, then Pretendard */
    background-color: var(--color-white);
    color: var(--color-black);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    width: 100%;
}
html { 
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}
ul, li { list-style: none; }
a { text-decoration: none; color: inherit; transition: 0.3s; }

/* [Typography Structure] */
h1, h2, h3, h4, .logo, .footer-logo, .font-accent { 
    font-family: var(--font-accent); 
    font-weight: 700; 
}

p, span, div, li, a {
    font-family: var(--font-accent), var(--font-main);
}

/* [Header - Sidae Style] */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
    display: flex;
    align-items: center;
}
.header-container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.header-left { display: flex; align-items: center; gap: 30px; }
.logo img { height: 32px; vertical-align: middle; }

.gnb-list { display: flex; gap: 40px; }
.gnb-link {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-black);
}
.gnb-link:hover { color: var(--color-secondary); }

.header-utils { display: flex; align-items: center; gap: 20px; }
.btn-hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

/* [Hero Section - Academic Paradigm] */
.container-main { padding-top: var(--header-height); }
.hero-section {
    padding: 100px 0;
    background: var(--color-white);
    min-height: 70vh;
    display: flex;
    align-items: center;
}
.hero-content {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}
.hero-title {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 40px;
    letter-spacing: -2px;
}
.hero-description {
    display: flex;
    flex-wrap: wrap;
    gap: 60px;
    margin-top: 60px;
}
.hero-text-main { flex: 1; min-width: 300px; }
.hero-text {
    font-size: 1.15rem;
    color: var(--color-gray-600);
    margin-bottom: 2rem;
    word-break: keep-all;
}
.hero-text-details {
    flex: 1;
    min-width: 300px;
    border-left: 1px solid var(--color-gray-200);
    padding-left: 40px;
}
.hero-text-details .hero-text {
    font-size: 1rem;
    color: var(--color-black);
    line-height: 1.8;
}

/* [Menu Grid Section - Sidae Style] */
.menu-section { margin-top: 40px; }
.menu-list { display: flex; gap: 15px; flex-wrap: wrap; }
.menu-item { border: 1px solid var(--color-black); padding: 12px 25px; border-radius: 30px; }
.menu-link { font-weight: 600; font-size: 0.95rem; }
.menu-item:hover { background: var(--color-black); color: var(--color-white); }

/* [Service Cards - Sidae Style] */
.services-grid { margin-top: 40px; }
.service-card {
    background: var(--color-white);
    padding: 50px 40px;
    border: 1px solid var(--color-gray-200);
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    cursor: pointer;
    position: relative;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    overflow: hidden;
}

.service-logo-wrapper {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    margin-bottom: 30px;
}

.service-logo {
    max-height: 100%;
    max-width: 220px;
    object-fit: contain;
    transition: all 0.5s ease;
    opacity: 0.95;
}


.service-no {
    display: block;
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--color-gray-400);
    margin-bottom: 10px;
    font-family: var(--font-accent);
    transition: all 0.3s ease;
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--color-black);
    letter-spacing: -0.5px;
    transition: all 0.3s ease;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    line-height: 1.6;
    word-break: keep-all;
    transition: all 0.3s ease;
}

/* Hover Animation */
.service-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.1);
    border-color: var(--color-black);
}

.service-card:hover .service-logo {
    filter: grayscale(0);
    opacity: 1;
    transform: scale(1.05);
}

.service-card:hover .service-no {
    color: var(--color-secondary);
}

.service-card::after {
    content: '→';
    position: absolute;
    bottom: 40px;
    right: 40px;
    font-size: 1.5rem;
    color: var(--color-black);
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.service-card:hover::after {
    opacity: 1;
    transform: translateX(0);
}


/* [Footer - Comprehensive Academy Style] */
.footer {
    background: var(--color-gray-100);
    padding: 80px 0 40px;
    border-top: 1px solid var(--color-gray-200);
}
.footer-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}
.footer-top {
    display: flex;
    flex-direction: column;
    gap: 40px;
}
.footer-brand {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-gray-200);
    padding-bottom: 30px;
}
.footer-social { display: flex; gap: 20px; }
.social-logo { height: 20px; opacity: 0.6; filter: grayscale(1); }

.footer-info {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
}
.footer-contact { display: flex; flex-direction: column; gap: 20px; }
.contact-campus-group { display: flex; gap: 30px; }
.footer-campus-name {
    display: block;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 5px;
}
.footer-campus-phone { font-size: 1.2rem; font-weight: 700; }

.company-details { font-size: 0.85rem; color: var(--color-gray-600); }
.company-info-group, .company-registration, .company-address {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    margin-bottom: 8px;
}
.info-divider { width: 1px; height: 10px; background: var(--color-gray-400); margin: 0 5px; }
.footer-links { margin-top: 30px; display: flex; flex-direction: column; gap: 10px; }
.links-row { display: flex; gap: 15px; flex-wrap: wrap; font-size: 0.85rem; font-weight: 600; }

.company-copyright { margin-top: 30px; color: var(--color-gray-400); font-size: 0.8rem; }

/* [Responsive] */
@media (max-width: 1024px) {
    .container-width { width: 95%; }
    .hero-title { font-size: 3rem; }
    .footer-info { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .header-left { gap: 15px; }
    .gnb-list { display: none; }
    .hero-title { font-size: 2.8rem; letter-spacing: -1px; }
    .hero-description { flex-direction: column; gap: 30px; }
    .hero-text-details { padding-left: 0; border-left: none; border-top: 1px solid var(--color-gray-200); padding-top: 30px; }
    
    .footer-brand { flex-direction: column; align-items: flex-start; gap: 20px; text-align: left; }
    .footer-social { flex-wrap: wrap; gap: 5px 15px; }
    .footer-social .info-divider { display: none; }
    
    .contact-campus-group { flex-direction: column; gap: 15px; }
    .footer-info { gap: 40px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.2rem; }
    .about-title { font-size: 1.6rem; }
    .footer-campus-phone { font-size: 1.1rem; }
    .service-card { padding: 40px 30px; }
    .about-section { padding: 60px 0; }
}

/* [Quick Banner Add-on] */
.show-on-scroll { opacity: 0; transform: translateY(20px); transition: 0.8s; }
.show-on-scroll.aos-animate { opacity: 1; transform: translateY(0); }

/* [About Section] */
.about-section {
    padding: 120px 0;
    background: var(--color-white);
    overflow: hidden;
}
.about-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 80px;
}
.about-image-box {
    flex: 1;
    position: relative;
}
.about-image-box img {
    width: 100%;
    max-height: 700px;
    object-fit: contain;
    border-radius: 0;
}
.about-content {
    flex: 1.2;
}
.about-title {
    font-size: 2.2rem;
    line-height: 1.3;
    margin-bottom: 40px;
    word-break: keep-all;
    color: var(--color-black);
}
.about-text {
    font-size: 1.1rem;
    color: var(--color-gray-600);
    margin-bottom: 25px;
    line-height: 1.8;
    word-break: keep-all;
    font-weight: 400;
}
.about-signature {
    margin-top: 50px;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-black);
}

@media (max-width: 991px) {
    .about-container { flex-direction: column; gap: 50px; }
    .about-title { font-size: 1.8rem; }
    .about-content { order: 2; }
    .about-image-box { order: 1; width: 100%; }
}