:root {
    --primary-color: #007bff;
    --bg-color: #f8f9fa;
    --text-color: #333;
    --white: #ffffff;
}

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

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

/* Navigation */
header {
    background: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

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

nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 400;
    transition: color 0.3s;
}

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

/* Hero Section */
.hero {
    height: 80vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1200&q=80');
    background-size: cover;
    background-position: center;
    color: var(--white);
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.cta-button {
    display: inline-block;
    padding: 0.8rem 2rem;
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 700;
    transition: transform 0.2s, background-color 0.3s;
}

.cta-button:hover {
    transform: translateY(-3px);
    background-color: #0056b3;
}

/* Features */
.features {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.features h2 {
    margin-bottom: 3rem;
    font-size: 2rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.option-btn {
    padding: 1rem;
    background-color: var(--white);
    border: 2px solid var(--primary-color);
    border-radius: 5px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.2s;
}

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

#result h2 { color: var(--primary-color); margin-bottom: 1rem; }
#result h3 { font-size: 1.5rem; margin-bottom: 1rem; }
#result p { line-height: 1.8; margin-bottom: 2rem; }