:root {
    --primary-color: #2E7D32;
    --primary-light: #E8F5E9;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #f9fbf9;
    --white: #ffffff;
}

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

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

header {
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #eee;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.logo img {
    width: 32px;
    height: 32px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav ul a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.btn {
    display: inline-block;
    padding: 0.7rem 1.5rem;
    font-size: 0.95rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    white-space: nowrap;
    text-align: center;
    transition: transform 0.2s, background-color 0.3s;
}

.btn:active {
    transform: scale(0.98);
}

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

.btn-primary:hover {
    background-color: #1B5E20;
}

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

.btn-secondary:hover {
    background-color: #C8E6C9;
}

.app-icon-large {
    width: 300px;
    height: 300px;
    filter: drop-shadow(0 20px 40px rgba(0,0,0,0.1));
}

.features {
    background-color: var(--white);
    padding: 6rem 2rem;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
    color: var(--primary-color);
}

.feature-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2.5rem;
    border-radius: 16px;
    background-color: var(--bg-color);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.philosophy {
    padding: 8rem 2rem;
    text-align: center;
}

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

blockquote {
    font-size: 2rem;
    font-weight: 300;
    font-style: italic;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

footer {
    padding: 3rem 2rem;
    text-align: center;
    border-top: 1px solid #eee;
    color: var(--text-light);
    font-size: 0.9rem;
}

@media (max-width: 992px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 4rem 2rem;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .app-icon-large {
        width: 200px;
        height: 200px;
    }
}

@media (max-width: 576px) {
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
}