a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    border: none;
    font-size: 14px;
}

.btn-primary {
    background-color: #0056b3;
    color: white;
}

.btn-primary:hover {
    background-color: #004494;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 86, 179, 0.2);
}

.btn-ghost {
    background: transparent;
    color: #0056b3;
    border: 1px solid #0056b3;
}

.btn-ghost:hover {
    background: #0056b3;
    color: white;
}

.breadcrumbs {
    padding: 20px 0;
    font-size: 13px;
    color: #666;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.breadcrumbs a {
    color: #0056b3;
    transition: color 0.2s;
}

.breadcrumbs a:hover {
    color: #003d82;
    text-decoration: underline;
}

.breadcrumbs span {
    color: #999;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 2.5fr 1fr;
    gap: 40px;
    margin: 30px 60px;
}

@media (max-width: 992px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .container {
        padding: 0 15px;
    }
}

.study-item {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.category-tag {
    display: inline-block;
    background: linear-gradient(135deg, #eef4fc 0%, #d8e7ff 100%);
    color: #0056b3;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 15px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid rgba(0, 86, 179, 0.1);
}

h1 {
    font-size: 36px;
    font-weight: 700;
    color: #111;
    margin-bottom: 10px;
    line-height: 1.2;
}

.article-header h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

.meta-info {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 14px;
    color: #777;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.meta-info i {
    margin-right: 5px;
    color: #0056b3;
}

.action-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.share-icons {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

.share-icons a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: #555;
}

.share-icons a:hover {
    background: #0056b3;
    color: white;
    transform: translateY(-2px);
}

.article-content {
    color: #444;
    line-height: 1.7;
}

.article-content h2 {
    font-size: 24px;
    color: #222;
    margin: 35px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
    position: relative;
}

.article-content h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: #0056b3;
}

.article-content p {
    margin-bottom: 20px;
    font-size: 16px;
    color: #555;
}

.article-content ul {
    list-style: none;
    margin: 20px 0;
}

.article-content li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    color: #555;
}

.article-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: #0056b3;
    font-weight: bold;
}

.highlight-box {
    background: linear-gradient(135deg, #f8fbff 0%, #f0f7ff 100%);
    border-left: 4px solid #0056b3;
    padding: 25px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
    box-shadow: 0 4px 15px rgba(0, 86, 179, 0.08);
}

.highlight-box h3 {
    color: #0056b3;
    font-size: 18px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.highlight-box h3::before {
    content: '📊';
    font-size: 20px;
}

.sidebar {
    position: sticky;
    top: 30px;
    align-self: start;
}

.sidebar-section {
    background: white;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    /* box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05); */
}

.sidebar-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 25px;
    color: #222;
    padding-bottom: 15px;
    position: relative;
}

.report-card {
    background: white;
    padding: 20px;
    border: 1px solid #eee;
    border-radius: 10px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.report-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: #0056b3;
    opacity: 0;
    transition: opacity 0.3s;
}

.report-card:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-color: #d0e2ff;
}

.report-card:hover::before {
    opacity: 1;
}

.report-category {
    font-size: 11px;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    font-weight: 600;
}

.report-title {
    font-size: 16px;
    font-weight: 600;
    color: #222;
    margin-bottom: 12px;
    line-height: 1.4;
}

.report-stats {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: #666;
    background: #f9f9f9;
    padding: 8px 12px;
    border-radius: 6px;
    margin-top: 10px;
}

.ad-box {
    background: linear-gradient(135deg, #001f3f 0%, #0056b3 100%);
    color: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
}

.ad-box h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.ad-box p {
    font-size: 15px;
    margin-bottom: 25px;
    opacity: 0.9;
    line-height: 1.6;
}

.newsletter-form {
    position: relative;
}

.newsletter-form input {
    padding: 14px;
    width: 100%;
    margin-bottom: 15px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: 6px;
    font-size: 15px;
    transition: all 0.3s;
}

.newsletter-form input:focus {
    outline: none;
    border-color: white;
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.ad-box .btn {
    background: white;
    color: #0056b3;
    width: 100%;
    font-weight: 600;
    padding: 14px;
    font-size: 15px;
    border-radius: 6px;
    transition: all 0.3s;
}

.ad-box .btn:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

@media (max-width: 768px) {
    h1 {
        font-size: 28px;
    }

    .article-header h1 {
        font-size: 24px;
    }

    .study-item {
        padding: 20px;
    }

    .action-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .share-icons {
        margin-left: 0;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 24px;
    }

    .article-header h1 {
        font-size: 20px;
    }

    .article-content h2 {
        font-size: 20px;
    }

    .sidebar-section {
        padding: 20px;
    }
}