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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", sans-serif;
    color: #1f2937;
    background: #f9fafb;
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.site-header {
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: #111827;
    text-decoration: none;
}

.site-header nav a {
    margin-left: 1.25rem;
    color: #374151;
    text-decoration: none;
}

.site-header nav a:hover {
    color: #2563eb;
}

main.container {
    padding-top: 3rem;
    padding-bottom: 3rem;
}

.hero {
    text-align: center;
    padding: 3rem 0;
}

.hero h1 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    color: #111827;
}

.hero .lead {
    font-size: 1.125rem;
    color: #4b5563;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    background: #2563eb;
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
}

.btn:hover {
    background: #1d4ed8;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.feature {
    background: #fff;
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid #e5e7eb;
}

.feature h3 {
    margin-bottom: 0.5rem;
    color: #111827;
}

.about h1 {
    margin-bottom: 1rem;
}

.about p {
    margin-bottom: 1rem;
    color: #374151;
}

.site-footer {
    background: #fff;
    border-top: 1px solid #e5e7eb;
    padding: 1.5rem 0;
    text-align: center;
    color: #6b7280;
    font-size: 0.875rem;
}