/* ========== SEO 콘텐츠 공통 CSS (calc-seo-common.css) ========== */
/* 폭 통일 & 카드 기반 UI를 위한 공통 스타일 */

/* ===== 한글 폰트 스택 정의 ===== */
:root {
    --font-family-ko: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", 
                      "맑은 고딕", "Malgun Gothic", Roboto, "Noto Sans KR", Arial, sans-serif;
}

/* ===== 1. 폭 기준 컨테이너 통일 ===== */

/* 결과 카드와 동일 폭으로 SEO 섹션 정렬 */
.calc-container {
    width: 100%;
    max-width: 100%;
    margin: 28px 0 0 0;
    padding: 0;
    box-sizing: border-box;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.calc-seo {
    width: 100%;
    margin: 0;
    padding: 30px;
    box-sizing: border-box;
}

/* container 안에서 계산기와 동일한 너비 유지 */
.container > .calc-seo {
    /* container의 padding을 고려 */
    margin-left: 0;
    margin-right: 0;
}

/* 섹션 간 일관된 간격 정의 */
:root {
    --section-gap: 28px;
    --card-padding: 18px 20px;
    --card-radius: 16px;
    --card-border: 1px solid rgba(0,0,0,0.08);
    --card-shadow: 0 6px 20px rgba(0,0,0,0.06);
}

/* ===== 2. SEO 섹션 타이포그래피 ===== */

.calc-seo {
    font-family: var(--font-family-ko);
    font-size: 16px;
    line-height: 1.8;
    color: #1f2937;
}

.calc-seo h2 {
    font-size: 22px;
    margin: 0 0 10px 0;
    font-weight: 700;
    color: #111827;
}

.calc-seo h3 {
    font-size: 18px;
    margin: 0 0 10px 0;
    font-weight: 600;
    color: #1f2937;
}

.calc-seo h4 {
    font-size: 16px;
    margin: 0 0 8px 0;
    font-weight: 600;
    color: #374151;
}

.calc-seo p {
    margin: 10px 0;
}

.calc-seo ul,
.calc-seo ol {
    margin: 12px 0;
    padding-left: 22px;
}

.calc-seo li {
    margin: 6px 0;
    line-height: 1.8;
}

/* ===== 3. SEO 카드 컴포넌트 ===== */

.calc-seo .seo-card {
    background: #fff;
    border: var(--card-border);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.calc-seo .seo-card + .seo-card {
    margin-top: 16px;
}

.calc-seo .seo-card:hover {
    box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

/* 헤더 카드: 보라색 그래디언트 배경 */
.calc-seo .seo-header-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
    text-align: center;
    padding: 28px 24px;
}

.calc-seo .seo-header-card h2 {
    color: white;
    font-size: 26px;
    margin-bottom: 8px;
}

.calc-seo .seo-header-card p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 15px;
    margin: 6px 0;
}

/* 경고 카드: 주황색 테두리 */
.calc-seo .seo-warning-card {
    border-left: 4px solid #f39c12;
    background: #fffbf5;
    padding: 20px 20px 20px 24px;
}

.calc-seo .seo-warning-card h3 {
    color: #d97706;
    margin-top: 0;
}

.calc-seo .seo-warning-card p {
    color: #7c2d12;
}

/* ===== 4. 공식(Formula) 박스 ===== */

.calc-seo .seo-formula {
    display: inline-block;
    padding: 8px 10px;
    border-radius: 12px;
    background: rgba(0,0,0,0.04);
    border: 1px solid rgba(0,0,0,0.06);
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 14px;
    font-weight: 500;
    color: #1f2937;
    white-space: nowrap;
}

.calc-seo .formula-box {
    background: #f3f4f6;
    border: 1px solid #e5e7eb;
    border-radius: 14px;
    padding: 18px 20px;
    margin: 16px 0;
}

.calc-seo .formula-box p {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 14px;
    color: #1f2937;
    margin: 8px 0;
    word-break: break-word;
}

/* ===== 5. 강조 요소 ===== */

.calc-seo .seo-highlight {
    background-color: #fef3c7;
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 600;
}

.calc-seo .seo-tip {
    background: #dbeafe;
    border-left: 4px solid #3b82f6;
    padding: 12px 16px;
    border-radius: 8px;
    margin: 16px 0;
    font-size: 15px;
    color: #1e40af;
}

/* ===== 6. 체크리스트: 2열 데스크톱, 1열 모바일 ===== */

.calc-seo .seo-checklist {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 14px;
    margin: 16px 0;
}

@media (max-width: 640px) {
    .calc-seo .seo-checklist {
        grid-template-columns: 1fr;
    }
}

.calc-seo .seo-checklist li {
    display: flex;
    align-items: flex-start;
    padding: 12px 14px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    list-style: none;
    margin: 0;
}

.calc-seo .seo-checklist li::before {
    content: '✓';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: #10b981;
    color: white;
    border-radius: 50%;
    font-size: 12px;
    font-weight: bold;
    margin-right: 10px;
    flex-shrink: 0;
}

.calc-seo .seo-checklist li span {
    line-height: 1.6;
}

/* ===== 7. 간단한 리스트 (마크) ===== */

.calc-seo .seo-simple-list {
    list-style: none;
    padding: 0;
    margin: 12px 0;
}

.calc-seo .seo-simple-list li {
    padding: 8px 0;
    padding-left: 28px;
    position: relative;
    margin: 0;
}

.calc-seo .seo-simple-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
    font-size: 16px;
}

/* ===== 8. 아코디언(Accordion) - details/summary ===== */

.calc-seo .seo-accordion {
    margin: 16px 0;
}

.calc-seo .seo-accordion details {
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: 14px;
    padding: 0;
    background: #fff;
    transition: box-shadow 0.2s ease;
}

.calc-seo .seo-accordion details + details {
    margin-top: 10px;
}

.calc-seo .seo-accordion details:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.calc-seo .seo-accordion summary {
    cursor: pointer;
    font-weight: 600;
    padding: 14px 16px;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
    color: #1f2937;
    transition: background-color 0.2s ease;
}

.calc-seo .seo-accordion summary:hover {
    background-color: #f9fafb;
}

/* WebKit 브라우저 마커 제거 */
.calc-seo .seo-accordion summary::-webkit-details-marker {
    display: none;
}

/* 사용자 정의 토글 화살표 */
.calc-seo .seo-accordion summary::after {
    content: '';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 6px;
    transition: transform 0.3s ease, background-color 0.2s ease;
    position: relative;
}

.calc-seo .seo-accordion summary::after::before {
    content: '▼';
    font-size: 12px;
    color: #667eea;
    font-weight: bold;
}

/* HTML 스타일로 화살표 처리 (대체) */
.calc-seo .seo-accordion details[open] summary::after {
    transform: rotate(180deg);
}

/* 아코디언 콘텐츠 */
.calc-seo .seo-accordion details .accordion-content {
    padding: 0 16px 16px 16px;
    color: #374151;
    line-height: 1.8;
}

.calc-seo .seo-accordion details .accordion-content p {
    margin: 8px 0;
}

.calc-seo .seo-accordion details .accordion-content ul {
    margin: 10px 0;
    padding-left: 22px;
}

.calc-seo .seo-accordion details .accordion-content li {
    margin: 5px 0;
}

/* ===== 9. 성공/경고/위험 박스 ===== */

.calc-seo .success-box,
.calc-seo .warning-box,
.calc-seo .caution-box,
.calc-seo .danger-box {
    border-radius: 12px;
    padding: 16px 18px;
    margin: 16px 0;
    border-left: 4px solid;
}

.calc-seo .success-box {
    background: #ecfdf5;
    border-left-color: #10b981;
    color: #065f46;
}

.calc-seo .success-box h4 {
    color: #047857;
    margin-top: 0;
}

.calc-seo .warning-box {
    background: #fffbeb;
    border-left-color: #f59e0b;
    color: #92400e;
}

.calc-seo .warning-box h4 {
    color: #b45309;
    margin-top: 0;
}

.calc-seo .caution-box {
    background: #fef3c7;
    border-left-color: #eab308;
    color: #713f12;
}

.calc-seo .caution-box h4 {
    color: #92400e;
    margin-top: 0;
}

.calc-seo .danger-box {
    background: #fee2e2;
    border-left-color: #ef4444;
    color: #7f1d1d;
}

.calc-seo .danger-box h4 {
    color: #991b1b;
    margin-top: 0;
}

/* ===== 10. 반응형 디자인 ===== */

/* 태블릿 (768px 이상) */
@media (max-width: 768px) {
    .calc-seo h2 {
        font-size: 20px;
    }

    .calc-seo h3 {
        font-size: 16px;
    }

    .calc-seo {
        font-size: 15px;
    }

    .calc-seo .seo-card {
        padding: 16px 18px;
    }

    .calc-seo .seo-header-card {
        padding: 24px 20px;
    }

    .calc-seo .seo-header-card h2 {
        font-size: 22px;
    }

    .calc-seo .seo-checklist {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px 12px;
    }

    .calc-seo .seo-accordion summary {
        padding: 12px 14px;
        font-size: 15px;
    }

    .calc-seo .seo-accordion details .accordion-content {
        padding: 0 14px 14px 14px;
    }
}

/* 모바일 (480px 이하) */
@media (max-width: 480px) {
    .calc-seo h2 {
        font-size: 18px;
    }

    .calc-seo h3 {
        font-size: 15px;
    }

    .calc-seo {
        font-size: 14px;
        line-height: 1.7;
    }

    .calc-seo .seo-card {
        padding: 14px 16px;
        border-radius: 12px;
    }

    .calc-seo .seo-card + .seo-card {
        margin-top: 12px;
    }

    .calc-seo .seo-header-card {
        padding: 20px 16px;
        border-radius: 12px;
    }

    .calc-seo .seo-header-card h2 {
        font-size: 18px;
        margin-bottom: 6px;
    }

    .calc-seo .seo-header-card p {
        font-size: 13px;
        margin: 4px 0;
    }

    .calc-seo .seo-checklist {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .calc-seo .seo-checklist li {
        padding: 10px 12px;
    }

    .calc-seo .seo-formula {
        font-size: 13px;
        padding: 6px 8px;
    }

    .calc-seo .formula-box {
        padding: 14px 16px;
    }

    .calc-seo .formula-box p {
        font-size: 12px;
        margin: 6px 0;
    }

    .calc-seo .seo-accordion summary {
        padding: 12px 13px;
        font-size: 14px;
    }

    .calc-seo .seo-accordion details .accordion-content {
        padding: 0 13px 12px 13px;
        font-size: 13px;
    }

    .calc-seo .seo-tip {
        padding: 10px 14px;
        font-size: 13px;
    }

    .success-box,
    .warning-box,
    .caution-box,
    .danger-box {
        padding: 14px 16px;
    }

    ul,
    ol {
        padding-left: 20px;
    }
}

/* ===== 환율 계산기 전용 스타일 ===== */

/* 용어 그리드 */
.term-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-top: 12px;
}

.term-item {
    padding: 14px;
    background: #f9fafb;
    border-radius: 10px;
    border-left: 3px solid #8b5cf6;
}

.term-item h4 {
    margin: 0 0 6px 0;
    font-size: 14px;
    font-weight: 600;
    color: #1f2937;
}

.term-item p {
    margin: 0;
    font-size: 13px;
    color: #6b7280;
    line-height: 1.5;
}

@media (max-width: 640px) {
    .term-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
}

/* 체크리스트 스타일 */
.seo-checklist {
    list-style: none;
    padding: 0;
    margin: 12px 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 14px;
}

.seo-checklist li {
    padding: 8px 0;
    font-size: 14px;
    color: #374151;
}

.seo-checklist li:before {
    content: "✓ ";
    color: #8b5cf6;
    font-weight: bold;
    margin-right: 6px;
}

@media (max-width: 640px) {
    .seo-checklist {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}

/* ===== SEO 섹션 article 태그 스타일 ===== */
.calc-seo article.seo-card {
    background: #fff;
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: 16px;
    padding: 18px 20px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.06);
    margin-top: 16px;
}

.calc-seo article.seo-card:first-of-type {
    margin-top: 24px;
}

.calc-seo article.seo-card h3 {
    color: #1f2937;
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 12px 0;
}

.calc-seo article.seo-card p {
    margin: 10px 0;
    line-height: 1.8;
    color: #4b5563;
}

/* 정보 테이블 스타일 */
.calc-seo .info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 14px;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.calc-seo .info-table thead {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.calc-seo .info-table th {
    padding: 12px 14px;
    color: #fff;
    font-weight: 600;
    text-align: center;
}

.calc-seo .info-table td {
    padding: 12px 14px;
    border-bottom: 1px solid #e5e7eb;
    text-align: center;
    color: #4b5563;
}

.calc-seo .info-table tbody tr:last-child td {
    border-bottom: none;
}

.calc-seo .info-table tbody tr:hover {
    background: rgba(102, 126, 234, 0.04);
}

/* 공식 박스 확장 */
.calc-seo .formula-box {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 16px 18px;
    margin: 14px 0;
    font-size: 14px;
    color: #1f2937;
    line-height: 1.7;
}

.calc-seo .formula-box p {
    margin: 8px 0;
}

.calc-seo .formula-box strong {
    color: #1f2937;
    font-weight: 600;
}

/* 팁 박스 */
.calc-seo .tip-box {
    background: #dbeafe;
    border-left: 4px solid #3b82f6;
    border-radius: 10px;
    padding: 14px 16px;
    margin: 14px 0;
}

.calc-seo .tip-box h4 {
    color: #1e40af;
    margin: 0 0 8px 0;
    font-size: 15px;
}

.calc-seo .tip-box p {
    margin: 6px 0;
    color: #1e40af;
    font-size: 14px;
}

/* 성공 박스 */
.calc-seo .success-box {
    background: #ecfdf5;
    border-left: 4px solid #10b981;
    border-radius: 10px;
    padding: 14px 16px;
    margin: 14px 0;
}

.calc-seo .success-box h4 {
    color: #065f46;
    margin: 0 0 8px 0;
    font-size: 15px;
}

.calc-seo .success-box p {
    margin: 6px 0;
    color: #065f46;
    font-size: 14px;
}

/* FAQ 섹션 */
.calc-seo .faq-section {
    margin-top: 16px;
}

.calc-seo .faq-item {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 12px;
}

.calc-seo .faq-item h4 {
    color: #1f2937;
    margin: 0 0 8px 0;
    font-size: 15px;
    font-weight: 600;
}

.calc-seo .faq-item p {
    margin: 6px 0;
    color: #4b5563;
    font-size: 14px;
    line-height: 1.6;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .calc-seo article.seo-card {
        padding: 16px 14px;
    }

    .calc-seo .info-table {
        font-size: 13px;
    }

    .calc-seo .info-table th,
    .calc-seo .info-table td {
        padding: 10px 8px;
    }
}