:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --light-bg: #f8f9fa;
    --dark-text: #343a40;
    --light-text: #ffffff;
    --font-family-korean: 'Noto Sans KR', sans-serif;
    --shadow-light: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 16px rgba(0, 0, 0, 0.15);
}

body {
    font-family: var(--font-family-korean);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: var(--dark-text);
    background-color: var(--light-bg);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-padding {
    padding: 4rem 0;
}

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

/* Typography */
h1, h2, h3 {
    font-weight: 700;
    color: var(--dark-text);
    margin-bottom: 1rem;
}

h1 {
    font-size: 2.8rem;
    line-height: 1.2;
}

h2 {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 3rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--light-text);
    padding: 0.8rem 1.8rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 700;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: var(--shadow-light);
}

.btn:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #545b62;
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://source.unsplash.com/random/1600x900/?coding,team,innovation') no-repeat center center/cover;
    color: var(--light-text);
    text-align: center;
    padding: 6rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    position: relative;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--light-text);
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-item {
    background-color: var(--light-text);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-light);
    text-align: center;
    transition: transform 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.feature-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.8rem;
}

/* Footer */
footer {
    background-color: var(--dark-text);
    color: var(--light-text);
    text-align: center;
    padding: 2rem 0;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    .hero {
        padding: 4rem 1rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .section-padding {
        padding: 3rem 0;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    .btn {
        padding: 0.7rem 1.5rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }
}