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h2:after{content:"";position:absolute;bottom:-12px;left:50%;transform:translate(-50%);width:80px;height:3px;background:linear-gradient(90deg,transparent,var(--color-primary),transparent);border-radius:var(--radius-full)}.content-section h3{color:var(--color-text-primary);font-size:var(--font-size-2xl);font-weight:var(--font-weight-semibold);line-height:var(--line-height-tight);margin-bottom:var(--space-md);padding-bottom:var(--space-sm);border-bottom:1px solid var(--color-border)}.content-section h4{background:linear-gradient(135deg,var(--color-primary-light) 0%,var(--color-primary) 100%);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent;color:var(--color-primary);font-size:var(--font-size-xl);font-weight:var(--font-weight-semibold);line-height:var(--line-height-tight);margin-bottom:var(--space-sm);margin-top:var(--space-xl)}.content-section p{color:var(--color-text-secondary);font-size:var(--font-size-base);line-height:var(--line-height-relaxed);margin-bottom:var(--space-lg)}.content-section ul,.content-section ol{background:var(--color-surface);border-radius:var(--radius-md);color:var(--color-text-secondary);line-height:var(--line-height-relaxed);padding:var(--space-lg) var(--space-lg) var(--space-lg) var(--space-2xl);@media (max-width: 768px){margin-bottom:0}}.content-section li{margin-bottom:var(--space-sm)}.content-section li::marker{color:var(--color-primary)}.content-section strong{color:var(--color-text-primary);font-weight:var(--font-weight-semibold)}.content-section ul li strong{color:var(--color-primary)}.content-section code{background:var(--color-gray-100);border:1px solid var(--color-border);border-radius:var(--radius-sm);color:var(--color-primary-dark);font-family:var(--font-mono);font-size:.9em;padding:.2em .4em}@media (max-width: 640px){.content-section{padding:var(--space-xl) var(--space-md)}.content-section article{padding:var(--space-xl) var(--space-lg)}.content-section h2{font-size:var(--font-size-2xl)}.content-section h2:after{width:60px}.content-section h3{font-size:var(--font-size-xl)}.content-section h4{font-size:var(--font-size-lg)}.content-section ul,.content-section ol{padding:var(--space-md) var(--space-md) var(--space-md) var(--space-xl)}}@media print{.upload-section,.controls-area,.download-section,.site-footer,.notification-container{display:none}.editor-section,.content-section{page-break-inside:avoid}}.payment-modal-overlay{position:fixed;inset:0;background-color:#000000bf;display:flex;align-items:center;justify-content:center;z-index:10000;padding:var(--space-md);animation:fadeIn .2s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.payment-modal{background:var(--color-white);border-radius:12px;max-width:500px;width:100%;position:relative;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a;animation:slideUp .3s ease-out}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.payment-modal-close{position:absolute;top:var(--space-md);right:var(--space-md);background:transparent;border:none;font-size:28px;line-height:1;color:var(--color-gray-400);cursor:pointer;padding:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:6px;transition:all .2s ease;z-index:1}.payment-modal-close:hover{background:var(--color-gray-100);color:var(--color-gray-600)}.payment-modal-content{padding:var(--space-2xl)}.payment-modal-title{font-size:var(--font-size-2xl);font-weight:700;color:var(--color-text-primary);margin:0 0 var(--space-lg);text-align:center}.payment-modal-description{font-size:var(--font-size-base);color:var(--color-text-secondary);line-height:1.6;margin:0 0 var(--space-md);text-align:center}.payment-modal-description strong{color:var(--color-primary);font-weight:600}.payment-modal-note{font-size:var(--font-size-sm);color:var(--color-text-secondary);background:var(--color-gray-50);padding:var(--space-md);border-radius:8px;margin:0 0 var(--space-xl);text-align:center}.paypal-button-container{margin:var(--space-xl) 0;min-height:45px}.payment-modal-footer{margin-top:var(--space-xl);padding-top:var(--space-lg);border-top:1px solid var(--color-border);text-align:center}.payment-modal-footer p{margin:0 0 var(--space-sm);font-size:var(--font-size-sm);color:var(--color-text-secondary)}.payment-modal-small{font-size:var(--font-size-xs)!important;color:var(--color-gray-400)!important}.payment-success,.payment-error{text-align:center;padding:var(--space-xl) 0}.payment-success-icon,.payment-error-icon{width:64px;height:64px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:32px;margin:0 auto var(--space-lg);animation:scaleIn .3s ease-out}@keyframes 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