/* Critical CSS */
 
 :root {
     --primary-color: #4361ee;
     --primary-dark: #3a56d4;
     --secondary-color: #3f37c9;
     --accent-color: #4895ef;
     --dark-color: #16213e;
     --light-color: #f8f9fa;
     --text-color: #e6f1ff;
     --text-secondary: #ccd6f6;
     --text-tertiary: #a8b2d1;
     --gray-color: #6c757d;
     --success-color: #4bb543;
     --error-color: #ff3333;
     --warning-color: #ffcc00;
     --footer-bg: #0a192f;
     --footer-text: #e6f1ff;
     --footer-link: #64ffda;
     --card-bg: rgba(16, 42, 87, 0.7);
     --card-border: rgba(67, 97, 238, 0.2);
     --tool-card-bg: rgba(16, 42, 87, 0.5);
 }
 
 body {
     font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
     line-height: 1.6;
     color: var(--text-color);
     background-color: #0a192f;
     background-image: linear-gradient(135deg, #0a192f 0%, #172a45 100%);
     margin: 0;
     padding: 0;
     overflow-x: hidden;
 }
 
 .container {
     max-width: 1200px;
     margin: 0 auto;
     padding: 0 20px;
 }
 
 .header {
     text-align: center;
     padding: 40px 0 30px;
 }
 
 .header h1 {
     font-size: clamp(1.8rem, 4vw, 2.5rem);
     margin-bottom: 10px;
     color: var(--primary-color);
     display: flex;
     align-items: center;
     justify-content: center;
     gap: 10px;
 }
 
 .header .subtitle {
     font-size: clamp(1rem, 2vw, 1.1rem);
     color: var(--text-secondary);
     max-width: 700px;
     margin: 0 auto;
 }
 
 .converter-card {
     background-color: var(--card-bg);
     border-radius: 10px;
     padding: 30px;
     margin-bottom: 40px;
     box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
     border: 1px solid var(--card-border);
     backdrop-filter: blur(5px);
 }
 
 .upload-section {
     border: 2px dashed rgba(67, 97, 238, 0.3);
     border-radius: 10px;
     padding: 40px 20px;
     text-align: center;
     margin-bottom: 30px;
     position: relative;
     min-height: 200px;
 }
 
 .upload-icon {
     font-size: 3rem;
     color: #4361ee;
     background: rgba(67, 97, 238, 0.1);
     padding: 20px;
     border-radius: 50%;
     border: 2px dashed rgba(67, 97, 238, 0.3);
     transition: all 0.3s ease;
     margin-bottom: 15px;
 }
 
 .upload-icon:hover {
     transform: scale(1.1);
     color: #4895ef !important;
     border-color: #4895ef !important;
     background: rgba(72, 149, 239, 0.2) !important;
 }
 
 .upload-heading {
     font-size: 1.5rem;
     margin-bottom: 10px;
     color: var(--text-color);
 }
 
 .browse-btn {
     background-color: var(--accent-color);
     color: white;
     border: none;
     padding: 12px 24px;
     border-radius: 8px;
     font-size: 1rem;
     cursor: pointer;
     transition: all 0.3s;
     margin-top: 15px;
 }
 
 .browse-btn:hover {
     background-color: var(--primary-dark);
     transform: translateY(-2px);
 }
 
 .size-notice {
     color: var(--text-tertiary);
     font-size: 0.9rem;
     margin: 5px 0;
 }
 
 .modern-notice {
     background-color: rgba(26, 188, 156, 0.1);
     border-left: 3px solid #1abc9c;
     padding: 10px;
     margin: 15px 0;
     border-radius: 0 4px 4px 0;
 }
 
 .file-info {
     display: none;
     align-items: center;
     justify-content: space-between;
     background-color: rgba(16, 42, 87, 0.5);
     padding: 10px 15px;
     border-radius: 8px;
     margin-top: 15px;
 }
 
 .remove-btn {
     background: none;
     border: none;
     color: var(--error-color);
     font-size: 1.2rem;
     cursor: pointer;
     padding: 0 5px;
 }
 
 .controls-grid {
     display: grid;
     grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
     gap: 20px;
     margin-bottom: 30px;
 }
 
 .control-group {
     margin-bottom: 15px;
 }
 
 .control-group label {
     display: block;
     margin-bottom: 8px;
     color: var(--text-secondary);
 }
 
 .control-group select,
 .control-group input[type="range"] {
     width: 100%;
     padding: 10px;
     border-radius: 6px;
     border: 1px solid var(--card-border);
     background-color: rgba(16, 42, 87, 0.7);
     color: var(--text-color);
 }
 
 .action-buttons {
     display: flex;
     gap: 15px;
     margin-bottom: 20px;
     flex-wrap: wrap;
 }
 
 .convert-btn,
 .download-btn {
     background-color: var(--accent-color);
     color: white;
     border: none;
     padding: 12px 24px;
     border-radius: 8px;
     font-size: 1rem;
     cursor: pointer;
     transition: all 0.3s;
     display: flex;
     align-items: center;
     justify-content: center;
 }
 
 .convert-btn:hover,
 .download-btn:hover {
     background-color: var(--primary-dark);
     transform: translateY(-2px);
 }
 
 .convert-btn:disabled,
 .download-btn:disabled {
     opacity: 0.6;
     cursor: not-allowed;
 }
 
 .btn-loader {
     display: none;
     width: 20px;
     height: 20px;
     border: 3px solid rgba(255, 255, 255, 0.3);
     border-radius: 50%;
     border-top-color: white;
     animation: spin 1s ease-in-out infinite;
     margin-left: 10px;
 }
 
 @keyframes spin {
     to {
         transform: rotate(360deg);
     }
 }
 
 .progress-container {
     display: none;
     margin-bottom: 20px;
 }
 
 .progress-info {
     display: flex;
     justify-content: space-between;
     margin-bottom: 5px;
     font-size: 0.9rem;
 }
 
 .progress-bar {
     height: 6px;
     background-color: rgba(16, 42, 87, 0.7);
     border-radius: 3px;
     overflow: hidden;
 }
 
 .progress-bar-fill {
     height: 100%;
     background-color: var(--accent-color);
     width: 0%;
     transition: width 0.3s;
 }
 
 .results-section {
     display: none;
     margin-top: 30px;
 }
 
 .results-header {
     margin-bottom: 20px;
 }
 
 .results-header h3 {
     color: var(--primary-color);
 }
 
 .image-preview-container {
     text-align: center;
 }
 
 .image-preview-container img {
     max-width: 100%;
     max-height: 400px;
     border-radius: 8px;
     box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
     margin-bottom: 20px;
 }
 
 .loading-overlay {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background-color: rgba(10, 25, 47, 0.9);
     display: flex;
     justify-content: center;
     align-items: center;
     z-index: 9999;
     display: none;
     flex-direction: column;
 }
 
 .spinner {
     width: 50px;
     height: 50px;
     border: 5px solid rgba(255, 255, 255, 0.3);
     border-radius: 50%;
     border-top-color: var(--primary-color);
     animation: spin 1s ease-in-out infinite;
 }
 
 .processing-text {
     margin-top: 20px;
     color: var(--text-color);
     font-size: 1.1rem;
 }
 
 .toast-container {
     position: fixed;
     top: 20px;
     right: 20px;
     z-index: 9999;
 }
 
 .toast {
     padding: 12px 20px;
     margin-bottom: 10px;
     border-radius: 6px;
     color: white;
     display: flex;
     align-items: center;
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
     animation: slideIn 0.3s, fadeOut 0.5s 4.5s;
 }
 
 .toast i {
     margin-right: 10px;
 }
 
 .toast.success {
     background-color: var(--success-color);
 }
 
 .toast.error {
     background-color: var(--error-color);
 }
 
 .toast.info {
     background-color: var(--accent-color);
 }
 
 @keyframes slideIn {
     from {
         transform: translateX(100%);
     }
     to {
         transform: translateX(0);
     }
 }
 
 @keyframes fadeOut {
     from {
         opacity: 1;
     }
     to {
         opacity: 0;
     }
 }
 /* Related Tools Section */
 
 .related-tools-section {
     margin: 40px 0;
     padding: 30px;
     background-color: var(--card-bg);
     border-radius: 10px;
     border: 1px solid var(--card-border);
 }
 
 .related-tools-section h2 {
     color: var(--primary-color);
     margin-bottom: 25px;
     text-align: center;
     position: relative;
     padding-bottom: 15px;
 }
 
 .related-tools-section h2::after {
     content: "";
     position: absolute;
     bottom: 0;
     left: 50%;
     transform: translateX(-50%);
     width: 80px;
     height: 3px;
     background-color: var(--accent-color);
 }
 
 .tools-grid {
     display: grid;
     grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
     gap: 25px;
     margin-top: 20px;
 }
 
 .tool-card {
     background-color: var(--tool-card-bg);
     border-radius: 12px;
     padding: 25px;
     transition: all 0.3s ease;
     border: 1px solid var(--card-border);
     display: flex;
     flex-direction: column;
     align-items: flex-start;
 }
 
 .tool-card:hover {
     transform: translateY(-5px);
     box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
     border-color: var(--accent-color);
 }
 
 .tool-icon-container {
     width: 50px;
     height: 50px;
     border-radius: 12px;
     display: flex;
     align-items: center;
     justify-content: center;
     margin-bottom: 15px;
     font-size: 1.5rem;
     color: white;
 }
 
 .tool-card h3 {
     color: var(--primary-color);
     margin-bottom: 12px;
     font-size: 1.2rem;
     font-weight: 600;
 }
 
 .tool-card p {
     color: var(--text-color);
     font-size: 0.95rem;
     margin-bottom: 20px;
     line-height: 1.5;
 }
 
 .tool-card a {
     display: inline-flex;
     align-items: center;
     background-color: var(--accent-color);
     color: white;
     padding: 10px 18px;
     border-radius: 8px;
     text-decoration: none;
     font-weight: 500;
     transition: all 0.3s;
     margin-top: auto;
 }
 
 .tool-card a:hover {
     background-color: var(--footer-link);
     transform: translateY(-2px);
     box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
     color: var(--accent-color);
 }
 
 .tool-card a i {
     margin-left: 8px;
     font-size: 0.9rem;
     transition: transform 0.3s;
 }
 
 .tool-card a:hover i {
     transform: translateX(3px);
 }
 
 .section-divider {
     height: 1px;
     background-color: var(--card-border);
     margin: 40px 0;
 }
 /* SEO Content Styling */
 
 .seo-content {
     margin: 40px 0;
     padding: 30px;
     background-color: var(--card-bg);
     border-radius: 10px;
     border: 1px solid var(--card-border);
 }
 
 .seo-content h2 {
     color: var(--primary-color);
     margin-top: 2rem;
     font-size: 1.5rem;
 }
 
 .seo-content h3 {
     color: var(--accent-color);
     margin-top: 1.5rem;
     font-size: 1.3rem;
 }
 
 .seo-content p {
     margin-bottom: 1rem;
     line-height: 1.6;
 }
 
 .seo-content ul,
 .seo-content ol {
     margin-left: 1.5rem;
     line-height: 1.6;
     margin-bottom: 1.5rem;
 }
 
 .seo-content li {
     margin-bottom: 0.5rem;
 }
 /* FAQ Styling */
 
 .faq-item {
     margin-bottom: 15px;
     border-bottom: 1px solid var(--card-border);
     padding-bottom: 15px;
 }
 
 .faq-question {
     background: none;
     border: none;
     width: 100%;
     text-align: left;
     padding: 10px 0;
     color: var(--text-color);
     font-size: 1.1rem;
     cursor: pointer;
     display: flex;
     justify-content: space-between;
     align-items: center;
 }
 
 .faq-question i {
     transition: transform 0.3s;
 }
 
 .faq-answer {
     max-height: 0;
     overflow: hidden;
     transition: max-height 0.3s ease;
     padding-left: 10px;
 }
 
 .faq-answer.show {
     max-height: 500px;
 }
 /* Blog section styling */
 
 .blog-section {
     margin-top: 40px;
     padding: 30px;
     background-color: var(--card-bg);
     border-radius: 10px;
     border: 1px solid var(--card-border);
 }
 
 .blog-section h2 {
     color: var(--primary-color);
     margin-bottom: 20px;
 }
 
 .blog-article {
     margin-bottom: 20px;
     padding-bottom: 20px;
     border-bottom: 1px solid var(--card-border);
 }
 
 .blog-article:last-child {
     border-bottom: none;
     margin-bottom: 0;
     padding-bottom: 0;
 }
 
 .blog-article h3 {
     margin-bottom: 10px;
     font-size: 1.2rem;
 }
 
 .blog-article a {
     color: var(--footer-link);
     text-decoration: none;
     transition: color 0.3s;
 }
 
 .blog-article a:hover {
     color: var(--accent-color);
     text-decoration: underline;
 }
 
 .blog-article p {
     color: var(--text-tertiary);
     font-size: 0.95rem;
     line-height: 1.5;
 }
 /* Go to Top Button */
 
 .go-to-top {
     position: fixed;
     bottom: 30px;
     right: 30px;
     background-color: var(--accent-color);
     color: white;
     width: 50px;
     height: 50px;
     border-radius: 50%;
     display: flex;
     align-items: center;
     justify-content: center;
     cursor: pointer;
     box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
     transition: all 0.3s;
     z-index: 99;
     opacity: 0;
     visibility: hidden;
 }
 
 .go-to-top.visible {
     opacity: 1;
     visibility: visible;
 }
 
 .go-to-top:hover {
     background-color: var(--primary-dark);
     transform: translateY(-3px);
 }
 
 .go-to-top i {
     font-size: 1.2rem;
 }