/* Light Theme Variables */
:root {
    --primary-color: #00d2ff;
    --secondary-color: #3a7bd5;
    --bg-color: #ffffff;
    --bg-alt: #f8f9fa;
    --text-color: #2c3e50;
    --text-light: #6c757d;
    --border-color: #e9ecef;
    --shadow-sm: 0 2px 8px rgba(44, 62, 80, 0.05);
    --shadow-md: 0 8px 24px rgba(44, 62, 80, 0.08);
    --shadow-lg: 0 20px 40px rgba(44, 62, 80, 0.12);
}

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

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

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

ul {
    list-style: none;
}

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

/* Header */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
    padding: 15px 0;
}

header.scrolled {
    padding: 10px 0;
    box-shadow: var(--shadow-sm);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 900;
    letter-spacing: 1px;
    color: var(--text-color);
}

.main-nav ul {
    display: flex;
    gap: 30px;
}

.main-nav a {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-color);
    transition: color 0.3s ease;
}

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

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 700;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: var(--text-color);
    color: #fff;
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: #fff;
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--text-color);
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.1rem;
}

/* Hero Section (Split) */
.hero-split {
    display: flex;
    align-items: center;
    min-height: 100vh;
    padding: 120px 40px 60px;
    max-width: 1400px;
    margin: 0 auto;
    gap: 60px;
}

.hero-text-content {
    flex: 1;
    max-width: 600px;
}

.badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(0, 210, 255, 0.1);
    color: var(--secondary-color);
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.text-gradient {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
}

.hero-image-wrapper {
    flex: 1;
    position: relative;
    border-radius: 24px;
}

.hero-image {
    width: 100%;
    height: auto;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
    display: block;
}

.floating-card {
    position: absolute;
    bottom: -20px;
    left: -30px;
    background: #fff;
    padding: 20px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

/* Sections */
.section {
    padding: 100px 0;
}

.bg-alt {
    background-color: var(--bg-alt);
}

.section-header {
    margin-bottom: 60px;
}

.text-center {
    text-align: center;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* Bento Grid */
.bento-section {
    background-color: var(--bg-alt);
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 240px;
    gap: 24px;
}

.bento-box {
    background: #fff;
    border-radius: 24px;
    padding: 40px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.bento-box:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.bento-large {
    grid-column: span 2;
    grid-row: span 2;
}

.bento-medium {
    grid-column: span 1;
    grid-row: span 2;
}

.bento-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.bento-tag {
    align-self: flex-start;
    padding: 4px 12px;
    background: rgba(0,0,0,0.05);
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: auto;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.bento-box h3 {
    font-size: 1.8rem;
    margin-bottom: 12px;
    font-weight: 800;
}

.bento-large h3 {
    font-size: 2.4rem;
}

.bento-box p {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 24px;
}

.bento-link {
    font-weight: 700;
    color: var(--primary-color);
    margin-top: auto;
}

.bento-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.1;
    z-index: 1;
    transition: opacity 0.3s ease;
}

.bento-box:hover .bento-bg {
    opacity: 0.2;
}

.bento-dark {
    background: var(--text-color);
    color: #fff;
}

.bento-dark p {
    color: rgba(255,255,255,0.7);
}

.bento-stats {
    margin-top: auto;
    z-index: 2;
}

.stat-num {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1;
    color: var(--primary-color);
    display: block;
}

.stat-unit {
    font-size: 1.5rem;
}

.stat-label {
    font-weight: 600;
    color: var(--text-light);
}

/* Sticky Scroll Section */
.sticky-scroll-section {
    padding: 120px 0;
}

.sticky-container {
    display: flex;
    gap: 60px;
    align-items: flex-start;
}

.sticky-content {
    flex: 1;
    position: sticky;
    top: 150px; /* Offset from top */
    padding-bottom: 50px;
}

.sticky-text-wrapper h2 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.sticky-text-wrapper .desc {
    margin-top: 30px;
    font-size: 1.1rem;
    line-height: 1.8;
}

.scroll-content {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    gap: 100px; /* Large gap for scrolling effect */
}

.scroll-card {
    background: #fff;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.card-image img {
    width: 100%;
    height: 350px;
    object-fit: cover;
    display: block;
    background: var(--bg-alt);
}

.card-info {
    padding: 40px;
}

.card-info h3 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.card-info p {
    color: var(--text-light);
    margin-bottom: 20px;
}

.feature-list {
    margin-top: 20px;
}

.feature-list li {
    padding-left: 24px;
    position: relative;
    margin-bottom: 10px;
    font-weight: 500;
}

.feature-list li::before {
    content: '✓';
    color: var(--primary-color);
    position: absolute;
    left: 0;
    font-weight: bold;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: var(--bg-alt);
    border-top: 1px solid var(--border-color);
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 40px;
}

/* Footer */
footer {
    background: #111827;
    color: #f3f4f6;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-slogan {
    font-weight: 800;
    line-height: 1.2;
}

.company-desc {
    margin-top: 20px;
    color: #9ca3af;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    justify-content: space-between;
}

.link-group h4 {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: #fff;
}

.link-group ul li {
    margin-bottom: 12px;
}

.link-group ul a {
    color: #9ca3af;
    transition: color 0.3s;
}

.link-group ul a:hover {
    color: var(--primary-color);
}

.contact-info p {
    color: #9ca3af;
    margin-bottom: 10px;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    color: #9ca3af;
    font-size: 0.9rem;
}

.social-links a {
    margin-left: 20px;
}

.social-links a:hover {
    color: #fff;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-split {
        flex-direction: column;
        text-align: center;
        padding-top: 150px;
    }
    
    .hero-text-content {
        margin: 0 auto;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .bento-grid {
        grid-template-columns: 1fr;
    }
    
    .bento-large, .bento-medium {
        grid-column: 1;
        grid-row: auto;
        min-height: 300px;
    }
    
    .sticky-container {
        flex-direction: column;
    }
    
    .sticky-content {
        position: relative;
        top: 0;
        padding-bottom: 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 30px;
    }
}