.content-container {
    flex: 1;
    overflow-y: auto;
    padding: 40px;
    background: #fff;
}

.viethoa-content {
    max-width: 800px;
    margin: 0 auto;
}

.viethoa-content h1 {
    color: var(--secondary-color);
    margin-bottom: 30px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
}

.viethoa-content section {
    margin-bottom: 40px;
}

.viethoa-content h2 {
    color: var(--secondary-color);
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.viethoa-content h3 {
    color: #444;
    margin-bottom: 15px;
}

.download-box {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #e9ecef;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    background: #28a745;
    color: white;
    text-decoration: none;
    padding: 15px 30px;
    border-radius: 50px;
    transition: transform 0.2s;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.3);
}

.download-btn .icon {
    font-size: 24px;
    margin-right: 15px;
}

.download-btn .text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.file-info {
    margin-top: 10px;
    color: #6c757d;
    font-size: 0.9rem;
}

.step {
    background: #fff;
    border: 1px solid #eee;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.step img, .placeholder-img {
    max-width: 100%;
    height: auto;
    margin: 15px 0;
    border-radius: 4px;
    border: 1px solid #ddd;
}

.placeholder-img {
    background: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
}

.warning-box {
    background: #fff3cd;
    border-left: 5px solid #ffc107;
    padding: 15px;
    color: #856404;
}

.success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
    padding: 10px;
    border-radius: 4px;
    margin-top: 10px;
}

details {
    background: #f8f9fa;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 4px;
    cursor: pointer;
}

details summary {
    font-weight: bold;
    color: var(--secondary-color);
}

details p {
    margin-top: 10px;
    color: #555;
}