.seo-content {
    margin-top: 40px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 12px;
    color: #4a5568;
}

    .seo-content h2,
    .seo-content h3 {
        color: #2d3748;
    }


/* Tabs */
.converter-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    justify-content: center;
}

.tab-btn {
    padding: 12px 30px;
    border: none;
    background: #e2e8f0;
    color: #4a5568;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

    .tab-btn.active {
        background: #667eea;
        color: white;
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
    }

    .tab-btn:hover:not(.active) {
        background: #cbd5e0;
    }

/* Converter Sections */
.converter-section {
    display: none;
}

    .converter-section.active {
        display: block;
    }

.converter-card {
    background: #f7fafc;
    border-radius: 15px;
    padding: 30px;
    border: 1px solid #e2e8f0;
}

    .converter-card h2 {
        color: #2d3748;
        margin-bottom: 15px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

.converter-description {
    color: #718096;
    margin-bottom: 25px;
}

/* Upload Area */
.upload-area {
    margin: 25px 0;
}

.upload-box {
    border: 3px dashed #cbd5e0;
    border-radius: 15px;
    padding: 40px 20px;
    text-align: center;
    background: white;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

    .upload-box:hover {
        border-color: #667eea;
        background: #f8f9fa;
    }

.upload-icon {
    font-size: 3rem;
    margin-bottom: 15px;
    display: block;
}

.upload-box h3 {
    color: #2d3748;
    margin-bottom: 10px;
}

.upload-box p {
    color: #718096;
    margin-bottom: 20px;
}

/* File Upload Control */
.file-input-wrapper {
    position: relative;
    display: inline-block;
    margin: 10px 0;
}

    .file-input-wrapper input[type="file"] {
        position: absolute;
        left: 0;
        top: 0;
        opacity: 0;
        width: 100%;
        height: 100%;
        cursor: pointer;
    }

.browse-btn {
    background: #667eea;
    color: white;
    padding: 12px 25px;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    display: inline-block;
    transition: background 0.3s;
}

    .browse-btn:hover {
        background: #5a6fd8;
    }

.file-info {
    font-size: 0.9rem;
    color: #a0aec0;
    margin-top: 15px;
}

.selected-file-info {
    margin-top: 15px;
    padding: 10px;
    background: #e8f4ff;
    border-radius: 6px;
    border-left: 4px solid #667eea;
    display: none;
}

/* Options */
.conversion-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 25px 0;
    padding: 20px;
    background: white;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

    .option-group label {
        font-weight: 600;
        color: #4a5568;
    }

select {
    padding: 10px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    color: #2d3748;
}

    select:focus {
        outline: none;
        border-color: #667eea;
    }

/* Buttons */
.action-buttons {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.btn {
    padding: 14px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    flex: 1;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
    }

.btn-secondary {
    background: #e2e8f0;
    color: #4a5568;
}

    .btn-secondary:hover {
        background: #cbd5e0;
    }

/* Messages */
.message-container {
    margin: 20px 0;
}

.message {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease;
}

.message-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
}

    .message-close:hover {
        opacity: 1;
    }

/* Download Link */
.download-link {
    margin-top: 20px;
    text-align: center;
}

.btn-download {
    display: inline-block;
    padding: 12px 25px;
    background: #48bb78;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: background 0.3s;
}

    .btn-download:hover {
        background: #38a169;
    }

/* Footer */
.footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #e2e8f0;
    color: #718096;
}

/* Animation */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 20px;
    }

    .converter-tabs {
        flex-direction: column;
    }

    .tab-btn {
        width: 100%;
    }

    .action-buttons {
        flex-direction: column;
    }

    .conversion-options {
        grid-template-columns: 1fr;
    }
}

/* Remove ad placeholders and complex features for now */
.ad-banner, .recent-conversions, .features-section {
    /*display: none;*/
}

.ad-container {
    margin: 20px 0;
    text-align: center;
}

.ad-banner {
    background: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 15px;
    margin: 15px 0;
    text-align: center;
}

.ad-leaderboard {
    width: 728px;
    height: 90px;
    margin: 0 auto;
    background: linear-gradient(45deg, #f0f0f0, #e0e0e0);
    border: 2px dashed #ccc;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    font-weight: bold;
}

.ad-square {
    width: 300px;
    height: 250px;
    margin: 0 auto;
    background: linear-gradient(45deg, #f8f9fa, #e9ecef);
    border: 2px dashed #dee2e6;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c757d;
    font-weight: bold;
}

.ad-rectangle {
    width: 336px;
    height: 280px;
    margin: 0 auto;
    background: linear-gradient(45deg, #f1f3f4, #e8eaed);
    border: 2px dashed #dadce0;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #5f6368;
    font-weight: bold;
}

.ad-vertical {
    width: 160px;
    height: 600px;
    margin: 0 auto;
    background: linear-gradient(45deg, #f8f9fa, #e9ecef);
    border: 2px dashed #dee2e6;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c757d;
    font-weight: bold;
}

.ad-text {
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 8px;
    font-style: italic;
}

/* Sidebar Ad (Desktop Only) */
.sidebar-ad {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    width: 160px;
    height: 600px;
    background: linear-gradient(45deg, #f8f9fa, #e9ecef);
    border: 2px dashed #dee2e6;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c757d;
    font-weight: bold;
    flex-direction: column;
    gap: 10px;
}

@media (max-width: 1200px) {
    .sidebar-ad {
        display: none;
    }
}