:root {
    --primary-color: #007bff;
    --secondary-color: #6f42c1;
    --success-color: #198754;
    --warning-color: #fd7e14;
    --danger-color: #dc3545;
    --info-color: #20c997;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #6c757d;
    --darker-gray: #495057;
    --darkest-gray: #343a40;
    --text-color: #333;
    --heading-color: #212529;
    --white-color: #ffffff;
    --body-font: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --base-font-size: 16px;
    --border-radius: 0.5rem;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--body-font); line-height: 1.8; color: var(--text-color); background-color: var(--white-color); font-weight: 400; font-size: var(--base-font-size); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
.container { max-width: 1140px; margin: 0 auto; padding: 0 15px; }
a { text-decoration: none; color: var(--primary-color); transition: all 0.2s ease; }
a:hover { color: #0056b3; text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; vertical-align: middle; }
h1, h2, h3, h4, h5, h6 { font-weight: 600; color: var(--heading-color); line-height: 1.4; margin-bottom: 1rem; margin-top: 1.5rem; }
h1 { font-size: 2.2rem; font-weight: 700; text-align: center; margin-bottom: 1.5rem; color: var(--primary-color); border-bottom: 2px solid var(--primary-color); padding-bottom: 1rem;}
h2 { font-size: 1.6rem; font-weight: 700; color: var(--secondary-color); margin-top: 2.5rem; border-bottom: none; text-align: left;}
h3 { font-size: 1.2rem; margin-bottom: 0.75rem; color: var(--darkest-gray); font-weight: 600;}
p { margin-bottom: 1.5rem; color: var(--darker-gray); font-size: 1rem; }
ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1.5rem; }
li { margin-bottom: 0.75rem; color: var(--darker-gray); font-size: 0.95rem;}
strong { font-weight: 600; color: var(--heading-color); }
section { padding: 3rem 0; }
.section-bg-white { background-color: var(--white-color); }
.section-bg-light { background-color: var(--light-gray); }
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.primary-cta-button { display: inline-block; padding: 0.9rem 1.75rem; background-color: var(--primary-color); color: white; border: none; border-radius: 50px; font-size: 1.05rem; font-weight: 600; cursor: pointer; transition: all 0.2s ease; box-shadow: 0 4px 10px rgba(0, 123, 255, 0.2); }
.primary-cta-button:hover { background-color: #0056b3; box-shadow: 0 6px 12px rgba(0, 86, 179, 0.3); transform: translateY(-2px); color: white; text-decoration: none;}
.external-link-button { margin-top: 3rem; }
.icon { display: inline-block; width: 1em; height: 1em; background-color: var(--medium-gray); border-radius: 3px; vertical-align: -2px; margin-right: 4px; }

.breadcrumb { background-color: var(--medium-gray); padding: 0.75rem 0; font-size: 0.9rem; margin-bottom: 3rem; }
.breadcrumb a { color: var(--dark-gray); }
.breadcrumb a:hover { color: var(--primary-color); }
.breadcrumb span { margin: 0 0.5rem; color: var(--dark-gray); }
.breadcrumb strong { color: var(--darkest-gray); font-weight: 600; }

.content-section { padding-top: 0; padding-bottom: 2rem;}
.content-section h2:first-of-type { margin-top: 0;}

.okky-summary-table-section { padding: 3rem 0; }
.okky-summary-table-section h2 { color: var(--warning-color); text-align: center; border-bottom: none; margin-bottom: 2rem; }
.okky-summary-table-container { overflow-x: auto; margin-top: 1rem; border: 1px solid var(--medium-gray); border-radius: var(--border-radius); box-shadow: 0 2px 4px rgba(0,0,0,0.05);}
.okky-summary-table { width: 100%; border-collapse: collapse; min-width: 500px; font-size: 0.9rem; }
.okky-summary-table th, .okky-summary-table td { border-bottom: 1px solid var(--medium-gray); padding: 0.9rem 1.1rem; text-align: left; vertical-align: middle; }
.okky-summary-table th { background-color: var(--white-color); font-weight: 600; color: var(--darkest-gray); width: 120px; }
.okky-summary-table tbody tr:last-child th, .okky-summary-table tbody tr:last-child td { border-bottom: none; }
.okky-summary-table tbody tr:nth-child(even) { background-color: #fbfbff; }

.pros-cons-section { padding: 3rem 0; }
.pros-cons-section h2 { color: var(--info-color); text-align: center; border-bottom: none; margin-bottom: 2.5rem;}
.pros-cons-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.pros-cons-list h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 2px solid; }
.pros-list h3 { color: var(--success-color); border-color: var(--success-color);}
.cons-list h3 { color: var(--danger-color); border-color: var(--danger-color);}
.pros-cons-list ul { list-style: none; padding-left: 0; }
.pros-cons-list li { margin-bottom: 0.8rem; padding-left: 1.5rem; position: relative; font-size: 0.95rem;}
.pros-cons-list li::before { position: absolute; left: 0; top: 0.1em; font-weight: bold; }
.pros-list li::before { content: '✓'; color: var(--success-color); }
.cons-list li::before { content: '✗'; color: var(--danger-color); }

.faq-section { background-color: var(--light-gray); padding: 3rem 0 5rem 0;}
.faq-section h2 { color: var(--success-color); text-align: center; border-bottom: none; margin-bottom: 2.5rem; }
.faq-container { max-width: 850px; margin: 0 auto; background-color: var(--white-color); padding: 1.5rem 2rem; border-radius: var(--border-radius); border: 1px solid var(--medium-gray); box-shadow: 0 3px 7px rgba(0,0,0,0.05);}
.faq-item { border-bottom: 1px solid var(--medium-gray); }
.faq-item:last-child { border-bottom: none; }
.faq-item summary { padding: 1.5rem 0; font-size: 1.1rem; font-weight: 600; color: var(--darkest-gray); cursor: pointer; list-style: none; position: relative; padding-right: 2.5rem; transition: color 0.2s ease; background-color: transparent; }
.faq-item summary:hover { color: var(--primary-color); background-color: #f8f9fa;}
.faq-item summary::after { content: '+'; position: absolute; right: 0; top: 50%; transform: translateY(-50%); font-size: 1.5rem; color: var(--primary-color); transition: transform 0.2s ease; }
.faq-item[open] summary::after { content: '−'; transform: translateY(-50%) rotate(180deg); }
.faq-item[open] summary { color: var(--primary-color); background-color: #e7f3ff; }
.faq-answer { padding: 1.5rem 1rem; font-size: 0.95rem; color: var(--darker-gray); line-height: 1.8; background-color: var(--white-color); border-top: 1px dashed var(--medium-gray);}
.faq-answer p { margin-bottom: 1rem; }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-item summary::-webkit-details-marker { display: none; }


@media (max-width: 992px) {
    h1 { font-size: 2.25rem; } h2 { font-size: 1.6rem; }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; } h2 { font-size: 1.5rem; }
    section { padding: 2.5rem 0; }
    h1 { margin-bottom: 1rem;}
    .breadcrumb { margin-bottom: 1.5rem; }
    .pros-cons-grid { grid-template-columns: 1fr; gap: 2rem;}
    .info-table th { width: 100px; }
    .faq-container { padding: 1rem 1.5rem; }
    .faq-item summary { font-size: 1rem; padding-right: 1.5rem; }
    .faq-answer { font-size: 0.9rem; padding: 1rem 0.5rem; }
}