:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-color: #1f2937;
    --light-text: #6b7280;
    --bg-color: #ffffff;
    --light-bg: #f3f4f6;
    --dark-bg: #111827;
    --white: #ffffff;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Typography */
h1,
h2,
h3 {
    font-weight: 700;
    line-height: 1.2;
}

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

ul {
    list-style: none;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 15px 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    letter-spacing: -0.5px;
}

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

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

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

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    background-color: var(--dark-bg);
    background-image: url('../images/hero-bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    /* Parallax effect */
    color: var(--white);
    padding-top: 80px;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.8) 0%, rgba(37, 99, 235, 0.5) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    letter-spacing: -1px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 40px;
    opacity: 0.9;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.3);
}

/* Sections General */
.section {
    padding: 120px 0;
    overflow: hidden;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--text-color);
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 15px auto 0;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    color: var(--light-text);
    margin-bottom: 80px;
    font-size: 1.1rem;
}

/* Company Section */
.company-section {
    background-color: var(--white);
}

.company-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.company-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.company-text p {
    color: var(--light-text);
    margin-bottom: 30px;
}

.feature-list li {
    margin-bottom: 15px;
    padding-left: 30px;
    position: relative;
    font-weight: 500;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.company-image {
    position: relative;
}

.company-image::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary-color);
    border-radius: 20px;
    z-index: 0;
    transition: var(--transition);
}

.company-image:hover::before {
    top: -10px;
    right: -10px;
}

.company-image .img-fluid {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.company-image:hover .img-fluid {
    transform: translateY(-5px);
}

/* Business Section */
.business-section {
    background-color: var(--light-bg);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.card {
    background: var(--white);
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--primary-color);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.card:hover {
    transform: translateY(-15px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.12);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: 25px;
    display: inline-block;
    transition: transform 0.4s ease;
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card h3 {
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.card p {
    color: var(--light-text);
}

/* Solutions Section */
.solutions-section {
    background-color: var(--white);
}

.solution-item {
    display: flex;
    align-items: center;
    gap: 80px;
    margin-bottom: 120px;
}

.solution-item:last-child {
    margin-bottom: 0;
}

.solution-item.reverse {
    flex-direction: row-reverse;
}

.solution-content {
    flex: 1;
}

.solution-content h3 {
    font-size: 2.2rem;
    margin-bottom: 25px;
    color: var(--text-color);
}

.solution-content p {
    color: var(--light-text);
    font-size: 1.1rem;
    line-height: 1.8;
}

.solution-img {
    flex: 1;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
}

.solution-img img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.solution-img:hover img {
    transform: scale(1.05);
}

/* Contact Section */
.contact-section {
    background-color: var(--dark-bg);
    color: var(--white);
    position: relative;
}

.contact-section .section-title,
.contact-section .section-subtitle {
    color: var(--white);
}

.contact-section .section-subtitle {
    opacity: 0.8;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    padding: 40px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--white);
    font-family: inherit;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background-color: #0f172a;
    color: var(--white);
    padding: 60px 0 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-logo {
    font-weight: 800;
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.copyright {
    color: #94a3b8;
    font-size: 0.9rem;
}

/* Animations */
[data-animate] {
    opacity: 0;
    transition: all 1s cubic-bezier(0.22, 1, 0.36, 1);
}

[data-animate="fade-up"] {
    transform: translateY(50px);
}

[data-animate="fade-left"] {
    transform: translateX(50px);
}

[data-animate="fade-right"] {
    transform: translateX(-50px);
}

[data-animate].in-view {
    opacity: 1;
    transform: translate(0, 0);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        gap: 15px;
        text-align: center;
    }

    .nav-links.active {
        display: flex;
        animation: slideDown 0.3s ease forwards;
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .menu-toggle {
        display: block;
    }

    .company-grid,
    .solution-item,
    .solution-item.reverse {
        grid-template-columns: 1fr;
        flex-direction: column;
        gap: 40px;
    }

    .company-image::before {
        display: none;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .section {
        padding: 80px 0;
    }
}