/* 페이지 헤더 */
.page-header {
    background: linear-gradient(135deg, #002147, #003366);
    color: white;
    padding: 120px 0 80px;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.breadcrumb-custom {
    background: transparent;
    padding: 0;
    margin: 0;
}

.breadcrumb-custom .breadcrumb-item a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

.breadcrumb-custom .breadcrumb-item.active {
    color: #66ccff;
}

/* 인증 현황 개요 */
.certification-overview {
    background: white;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    padding: 3rem;
    margin: -60px auto 4rem;
    position: relative;
    z-index: 2;
}

.cert-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.stat-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #0066cc, #004499);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 2rem;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: #002147;
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #6c757d;
    font-weight: 500;
}

/* 인증서 섹션 */
.certification-section {
    margin: 4rem 0;
}

.cert-category {
    margin-bottom: 4rem;
}

.category-header {
    text-align: center;
    margin-bottom: 3rem;
}

.category-title {
    font-size: 2rem;
    font-weight: 700;
    color: #002147;
    margin-bottom: 0.5rem;
}

.category-subtitle {
    color: #6c757d;
    font-size: 1.1rem;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.cert-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cert-image {
    height: 200px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.cert-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, #0066cc, #66ccff);
    opacity: 0.1;
}

.cert-icon {
    font-size: 4rem;
    color: #0066cc;
    z-index: 1;
    position: relative;
}

.cert-content {
    padding: 2rem;
}

.cert-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: #002147;
    margin-bottom: 1rem;
}

.cert-details {
    list-style: none;
    padding: 0;
    margin: 0;
}

.cert-details li {
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cert-details li:last-child {
    border-bottom: none;
}

.cert-label {
    color: #6c757d;
    font-weight: 500;
}

.cert-value {
    color: #333;
    font-weight: 600;
}

.cert-status {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.9rem;
    font-weight: 600;
}

.status-valid {
    background: #d4edda;
    color: #155724;
}

.status-pending {
    background: #fff3cd;
    color: #856404;
}

.status-expired {
    background: #f8d7da;
    color: #721c24;
}

/* 특허 섹션 */
.patent-section {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    padding: 4rem 0;
    margin: 4rem 0;
    border-radius: 30px;
}

.patent-card {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.patent-header {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
}

.patent-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #0066cc, #004499);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.5rem;
    color: white;
    font-size: 1.8rem;
}

.patent-info h4 {
    margin-bottom: 0.5rem;
    color: #002147;
}

.patent-type {
    color: #0066cc;
    font-weight: 600;
    font-size: 0.9rem;
}

.patent-description {
    color: #555;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.patent-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid #f0f0f0;
}

.meta-item {
    text-align: center;
}

.meta-label {
    display: block;
    font-size: 0.9rem;
    color: #6c757d;
    margin-bottom: 0.3rem;
}

.meta-value {
    font-weight: 600;
    color: #333;
}

/* 품질 시스템 섹션 */
.quality-section {
    margin: 4rem 0;
}

.quality-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.quality-card {
    background: white;
    border: 2px solid #e9ecef;
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.quality-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #0066cc, #004499);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.quality-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #002147;
    margin-bottom: 1rem;
}

.quality-description {
    color: #555;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.quality-features {
    list-style: none;
    padding: 0;
    text-align: left;
}

.quality-features li {
    padding: 0.5rem 0;
    color: #333;
    position: relative;
    padding-left: 1.5rem;
}

.quality-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #0066cc;
    font-weight: bold;
}

/* 섹션 제목 */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #002147;
    text-align: center;
    margin-bottom: 1rem;
}

.section-subtitle {
    text-align: center;
    color: #6c757d;
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

/* 반응형 */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2.2rem;
    }

    .certification-overview {
        margin: -40px 1rem 2rem;
        padding: 2rem;
    }

    .cert-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .cert-grid {
        grid-template-columns: 1fr;
    }

    .patent-header {
        flex-direction: column;
        text-align: center;
    }

    .patent-icon {
        margin: 0 0 1rem 0;
    }

    .patent-meta {
        grid-template-columns: 1fr;
    }

    .quality-grid {
        grid-template-columns: 1fr;
    }
}