/* 메인 스타일 (Main Styles) */

:root {
    --primary-color: #0066cc;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2em;
    opacity: 0.9;
}

main {
    background: white;
    padding: 40px;
    margin: 20px 0;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.intro-section {
    text-align: center;
    margin-bottom: 40px;
}

.intro-section h2 {
    font-size: 2em;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature {
    padding: 30px;
    background: var(--light-color);
    border-radius: 8px;
    transition: transform 0.3s;
}

.feature:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.feature h3 {
    font-size: 1.5em;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.cta-section {
    text-align: center;
    margin-top: 40px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s;
}

.btn:hover {
    background: #0052a3;
}

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

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

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

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

footer {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 0.9em;
}