.certificate-category {
    margin-bottom: 1.5rem;
    border: 1px solid rgba(20, 184, 166, 0.2);
    border-radius: 1.5rem;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(4px);
    transition: box-shadow 0.3s;
}

.certificate-category:hover {
    box-shadow: 0 8px 20px -8px rgba(0, 0, 0, 0.1);
}

.certificate-category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    cursor: pointer;
    user-select: none;
    transition: background 0.2s;
    border-radius: 1.5rem;
}

.certificate-category-header:hover {
    background: rgba(20, 184, 166, 0.05);
}

.certificate-category-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
}

.certificate-category-toggle {
    font-size: 1.2rem;
    transition: transform 0.3s;
    color: var(--teal);
}

.certificates-grid-wrapper {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-in-out, padding 0.3s ease;
    padding: 0 1.5rem;
}

.certificate-category.open .certificates-grid-wrapper {
    max-height: 2000px;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    padding-top: 1.5rem;
}

.certificate-card {
    background: white;
    border-radius: 1.2rem;
    padding: 1.2rem;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    border: 1px solid rgba(20, 184, 166, 0.2);
    box-shadow: 0 10px 20px -8px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    cursor: pointer;
    height: 100%;
}

.certificate-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 30px -12px rgba(0, 0, 0, 0.15);
    border-color: var(--teal);
}

.certificate-pdf-icon {
    font-size: 3.5rem;
    margin-bottom: 0.3rem;
    transition: transform 0.3s;
}

.certificate-card:hover .certificate-pdf-icon {
    transform: scale(1.1);
}

.certificate-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
}

.certificate-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: #0f172a;
}

.certificate-description {
    font-size: 0.9rem;
    color: #475569;
    line-height: 1.4;
    text-align: justify;
    flex: 1;
    margin-bottom: 0.6rem;
}

.certificate-footer {
    margin-top: auto;
    width: 100%;
}

.certificate-link {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    border-radius: 2rem;
    background: linear-gradient(135deg, var(--blue), var(--teal));
    color: white;
    text-align: center;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s;
    box-sizing: border-box;
}

.certificate-link:hover {
    background: linear-gradient(135deg, #1d4ed8, #0f766e);
    transform: scale(1.05);
    box-shadow: 0 5px 12px rgba(37, 99, 235, 0.3);
}

.loading-certificates {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 1.5rem;
    color: #475569;
    font-size: 1rem;
    backdrop-filter: blur(4px);
}

/* Адаптивные стили */
@media (max-width: 1200px) {
    .certificate-category-header {
        padding: 0.8rem 1.2rem;
    }

    .certificate-category-title {
        font-size: 1.2rem;
    }

    .certificate-category-toggle {
        font-size: 1.1rem;
    }

    .certificates-grid-wrapper {
        padding: 0 1.2rem;
    }

    .certificate-category.open .certificates-grid-wrapper {
        padding: 0 1.2rem 1.2rem 1.2rem;
    }

    .certificates-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
        gap: 1.3rem;
        padding-top: 1.3rem;
    }

    .certificate-card {
        padding: 1rem;
        border-radius: 1rem;
    }

    .certificate-pdf-icon {
        font-size: 3rem;
    }

    .certificate-title {
        font-size: 1rem;
    }

    .certificate-description {
        font-size: 0.85rem;
    }

    .certificate-link {
        font-size: 0.8rem;
        padding: 0.4rem 0.7rem;
    }
}

@media (max-width: 992px) {
    .certificate-category {
        border-radius: 1.2rem;
        margin-bottom: 1.2rem;
    }

    .certificate-category-header {
        padding: 0.7rem 1rem;
        border-radius: 1.2rem;
    }

    .certificate-category-title {
        font-size: 1.1rem;
    }

    .certificate-category-toggle {
        font-size: 1rem;
    }

    .certificates-grid-wrapper {
        padding: 0 1rem;
    }

    .certificate-category.open .certificates-grid-wrapper {
        padding: 0 1rem 1rem 1rem;
    }

    .certificates-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 1.2rem;
        padding-top: 1.2rem;
    }

    .certificate-card {
        padding: 0.9rem;
        border-radius: 0.9rem;
    }

    .certificate-pdf-icon {
        font-size: 2.8rem;
        margin-bottom: 0.2rem;
    }
    
    .certificate-title {
        font-size: 0.95rem;
    }

    .certificate-description {
        font-size: 0.8rem;
        line-height: 1.35;
    }

    .certificate-link {
        font-size: 0.75rem;
        padding: 0.35rem 0.65rem;
        border-radius: 1.8rem;
    }

    .loading-certificates {
        padding: 1.5rem;
        font-size: 0.9rem;
        border-radius: 1.2rem;
    }
}

@media (max-width: 768px) {
    .certificate-category {
        border-radius: 1rem;
        margin-bottom: 1rem;
    }

    .certificate-category-header {
        padding: 0.6rem 0.9rem;
        border-radius: 1rem;
    }

    .certificate-category-title {
        font-size: 1rem;
    }

    .certificate-category-toggle {
        font-size: 0.9rem;
    }

    .certificates-grid-wrapper {
        padding: 0 0.9rem;
    }

    .certificate-category.open .certificates-grid-wrapper {
        padding: 0 0.9rem 0.9rem 0.9rem;
    }

    .certificates-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 1rem;
        padding-top: 1rem;
    }

    .certificate-card {
        padding: 0.8rem;
        border-radius: 0.8rem;
    }

    .certificate-pdf-icon {
        font-size: 2.5rem;
        margin-bottom: 0.15rem;
    }

    .certificate-title {
        font-size: 0.9rem;
    }

    .certificate-description {
        font-size: 0.75rem;
        line-height: 1.3;
        margin-bottom: 0.5rem;
    }

    .certificate-link {
        font-size: 0.7rem;
        padding: 0.3rem 0.6rem;
        border-radius: 1.5rem;
    }

    .loading-certificates {
        padding: 1.2rem;
        font-size: 0.85rem;
        border-radius: 1rem;
    }
}

@media (max-width: 576px) {
    .certificate-category {
        border-radius: 0.9rem;
        margin-bottom: 0.9rem;
    }

    .certificate-category-header {
        padding: 0.5rem 0.8rem;
        border-radius: 0.9rem;
    }

    .certificate-category-title {
        font-size: 0.9rem;
    }

    .certificate-category-toggle {
        font-size: 0.8rem;
    }

    .certificates-grid-wrapper {
        padding: 0 0.8rem;
    }

    .certificate-category.open .certificates-grid-wrapper {
        padding: 0 0.8rem 0.8rem 0.8rem;
    }

    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 0.9rem;
        padding-top: 0.9rem;
    }

    .certificate-card {
        padding: 0.7rem;
        border-radius: 0.7rem;
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        text-align: left;
        gap: 0.8rem;
    }

    .certificate-pdf-icon {
        font-size: 2.2rem;
        margin-bottom: 0;
        flex: 0 0 auto;
    }

    .certificate-content {
        flex: 1;
        min-width: 150px;
    }

    .certificate-title {
        font-size: 0.85rem;
    }

    .certificate-description {
        font-size: 0.7rem;
        line-height: 1.3;
        margin-bottom: 0.4rem;
    }

    .certificate-link {
        font-size: 0.65rem;
        padding: 0.25rem 0.5rem;
        border-radius: 1.2rem;
    }

    .loading-certificates {
        padding: 1rem;
        font-size: 0.8rem;
        border-radius: 0.9rem;
    }
}

@media (max-width: 480px) {
    .certificate-category {
        border-radius: 0.8rem;
        margin-bottom: 0.8rem;
    }

    .certificate-category-header {
        padding: 0.4rem 0.7rem;
        border-radius: 0.8rem;
    }

    .certificate-category-title {
        font-size: 0.8rem;
    }

    .certificate-category-toggle {
        font-size: 0.7rem;
    }

    .certificates-grid-wrapper {
        padding: 0 0.7rem;
    }

    .certificate-category.open .certificates-grid-wrapper {
        padding: 0 0.7rem 0.7rem 0.7rem;
    }

    .certificates-grid {
        gap: 0.7rem;
        padding-top: 0.7rem;
    }

    .certificate-card {
        padding: 0.6rem;
        border-radius: 0.6rem;
        gap: 0.6rem;
    }

    .certificate-pdf-icon {
        font-size: 2rem;
    }

    .certificate-title {
        font-size: 0.8rem;
    }

    .certificate-description {
        font-size: 0.65rem;
        line-height: 1.25;
    }

    .certificate-link {
        font-size: 0.6rem;
        padding: 0.2rem 0.4rem;
        border-radius: 1rem;
    }

    .loading-certificates {
        padding: 0.8rem;
        font-size: 0.75rem;
        border-radius: 0.8rem;
    }
}

@media (max-width: 360px) {
    .certificate-category {
        border-radius: 0.6rem;
        margin-bottom: 0.6rem;
    }

    .certificate-category-header {
        padding: 0.3rem 0.5rem;
        border-radius: 0.6rem;
    }

    .certificate-category-title {
        font-size: 0.7rem;
    }

    .certificate-category-toggle {
        font-size: 0.6rem;
    }

    .certificates-grid-wrapper {
        padding: 0 0.5rem;
    }

    .certificate-category.open .certificates-grid-wrapper {
        padding: 0 0.5rem 0.5rem 0.5rem;
    }

    .certificates-grid {
        gap: 0.5rem;
        padding-top: 0.5rem;
    }

    .certificate-card {
        padding: 0.5rem;
        border-radius: 0.5rem;
        gap: 0.4rem;
    }

    .certificate-pdf-icon {
        font-size: 1.7rem;
    }

    .certificate-title {
        font-size: 0.7rem;
    }

    .certificate-description {
        font-size: 0.6rem;
        line-height: 1.2;
    }

    .certificate-link {
        font-size: 0.55rem;
        padding: 0.15rem 0.35rem;
        border-radius: 0.8rem;
    }

    .loading-certificates {
        padding: 0.6rem;
        font-size: 0.65rem;
        border-radius: 0.6rem;
    }
}