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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Pretendard', sans-serif;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    line-height: 1.8;
    color: #2C3E50;
    background: #FAFAFA;
}

header {
    border-bottom: 3px solid #A8C3A0;
    padding-bottom: 24px;
    margin-bottom: 40px;
}

header h1 {
    color: #2C3E50;
    font-size: 36px;
    margin-bottom: 8px;
}

.tagline {
    font-style: italic;
    color: #666;
    font-size: 18px;
    margin-bottom: 20px;
}

nav a {
    margin-right: 20px;
    color: #4A7C59;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover {
    color: #A8C3A0;
    text-decoration: underline;
}

section {
    margin-bottom: 48px;
}

section h2 {
    color: #2C3E50;
    font-size: 24px;
    margin-bottom: 16px;
    border-left: 4px solid #A8C3A0;
    padding-left: 12px;
}

section p {
    margin-bottom: 12px;
}

ol, ul {
    margin-left: 24px;
    margin-bottom: 16px;
}

ol li, ul li {
    margin-bottom: 8px;
}

.app {
    background: white;
    padding: 20px;
    margin-bottom: 16px;
    border-radius: 12px;
    border: 1px solid #E8E8E8;
    transition: transform 0.2s, box-shadow 0.2s;
}

.app:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.app h3 {
    color: #2C3E50;
    margin-bottom: 8px;
}

.app p {
    color: #666;
    font-size: 15px;
    margin: 0;
}

a {
    color: #4A7C59;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    margin-top: 64px;
    padding-top: 24px;
    border-top: 1px solid #E8E8E8;
    color: #888;
    font-size: 14px;
    text-align: center;
}

footer p {
    margin-bottom: 8px;
}