:root{--bg-body: linear-gradient(135deg, #f3f3f3 0%, #dce6f8 100%);--bg-container: #ffffff;--bg-section: #f8f9ff;--bg-section-hover: #eef5ff;--bg-section-alt: #f8f9ff;--bg-input: #ffffff;--text-primary: #2d3748;--text-secondary: #4a5568;--text-muted: #718096;--border-color: #e2e8f0;--border-dashed: #dce6f8;--shadow-sm: rgba(0, 0, 0, .1);--shadow-md: rgba(0, 0, 0, .2);--shadow-lg: rgba(0, 0, 0, .3);--primary-green: #A0C878;--primary-green-dark: #B0DB9C}.dark-mode{--bg-body: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);--bg-container: #2d3748;--bg-section: #2d3748;--bg-section-hover: #3a475f;--bg-section-alt: #2d3748;--bg-input: #1a202c;--text-primary: #ffffff;--text-secondary: #f7fafc;--text-muted: #e2e8f0;--border-color: #4a5568;--border-dashed: #4a5568;--shadow-sm: rgba(0, 0, 0, .4);--shadow-md: rgba(0, 0, 0, .5);--shadow-lg: rgba(0, 0, 0, .6)}*{box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-body);min-height:100vh;margin:0;transition:background .3s ease;color:var(--text-primary)}main{padding:40px 20px;min-height:calc(100vh - 160px)}.zif-hero{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:10vh;padding:2rem 1rem}.zif-hero-title{font-size:2.5rem;margin-bottom:.75rem;color:var(--text-primary);transition:color .3s ease}.zif-hero-subtitle{font-size:1.2rem;line-height:1.6;color:var(--text-muted);transition:color .3s ease}.dark-mode .zif-hero{background-color:#ffffff0a}.dark-mode .zif-hero-title{color:#fff}.dark-mode .zif-hero-subtitle{color:#fffc}.upload-section{background:var(--bg-section);border:2.3px dashed var(--border-dashed);border-radius:15px;padding:40px;text-align:center;margin-bottom:30px;transition:all .3s ease;cursor:pointer;position:relative}.upload-section:hover,.upload-section.dragover{border-color:var(--primary-green);background:var(--bg-section-alt);transform:translateY(-2px)}.upload-icon{font-size:3rem;margin-bottom:15px;color:var(--primary-green)}.upload-text{font-size:1.2rem;font-weight:600;color:var(--text-primary);margin-bottom:10px;transition:color .3s ease}.upload-subtext{color:var(--text-muted);font-size:.9rem;transition:color .3s ease}#videoInput{display:none}.settings-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:25px;margin-bottom:30px}.setting-group{background:var(--bg-section);padding:25px;border-radius:15px;border:2px solid var(--border-color);position:relative;transition:all .3s ease;z-index:1}.setting-group:hover{border-color:var(--primary-green);box-shadow:0 8px 25px #a0c87826;transform:translateY(-2px);z-index:10}.setting-group label{display:block;font-weight:700;color:var(--text-primary);margin-bottom:12px;font-size:1rem;transition:color .3s ease}.setting-group input,.setting-group select{width:100%;padding:15px;border:2px solid var(--border-color);border-radius:10px;font-size:1rem;transition:all .3s ease;background:var(--bg-input);color:var(--text-primary);font-weight:500}.setting-group input:focus,.setting-group select:focus{outline:none;border-color:var(--primary-green);box-shadow:0 0 0 4px #a0c8781a}.setting-group select{cursor:pointer;appearance:none;background-image:url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%234a5568' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 15px center;padding-right:45px}.dark-mode .setting-group select{background-image:url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%23f7fafc' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E")}.setting-group input[type=color]{height:50px;cursor:pointer;padding:5px}.setting-group input[type=color]::-webkit-color-swatch-wrapper{padding:0}.setting-group input[type=color]::-webkit-color-swatch{border:none;border-radius:8px}.convert-btn{width:100%;background:linear-gradient(135deg,var(--primary-green) 0%,var(--primary-green-dark) 100%);color:#fff;border:none;padding:20px 30px;border-radius:15px;font-size:1.2rem;font-weight:700;cursor:pointer;transition:all .3s ease;margin-bottom:30px;text-transform:uppercase;letter-spacing:1.5px;position:relative;overflow:hidden}.convert-btn:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 15px 35px #a0c87866}.convert-btn:disabled{background:#cbd5e0;cursor:not-allowed;transform:none;box-shadow:none;opacity:.6}.preview-section,.output-section{margin-bottom:30px}.section-title{font-size:1.5rem;font-weight:800;color:var(--text-primary);margin-bottom:20px;display:flex;align-items:center;gap:12px;padding-bottom:10px;border-bottom:3px solid var(--border-color);transition:all .3s ease}#preview{display:flex;gap:15px;overflow-x:auto;padding:20px;background:var(--bg-section-alt);border-radius:15px;border:2px solid var(--border-color);transition:all .3s ease}#preview img{max-height:100px;border-radius:10px;box-shadow:0 6px 15px var(--shadow-md);transition:all .3s ease;border:2px solid var(--bg-container)}#preview img:hover{transform:scale(1.1) rotate(2deg);box-shadow:0 10px 25px var(--shadow-lg)}.output-section{text-align:center}#output img{max-width:100%;border-radius:15px;box-shadow:0 15px 40px var(--shadow-lg);margin-bottom:25px;border:3px solid var(--bg-container)}#downloadLink{display:inline-block;background:linear-gradient(135deg,#48bb78,#38a169);color:#fff;text-decoration:none;padding:18px 40px;border-radius:50px;font-weight:700;font-size:1.2rem;transition:all .3s ease;box-shadow:0 8px 20px #48bb7866;margin-bottom:20px;text-transform:uppercase;letter-spacing:1px}#downloadLink:hover{transform:translateY(-3px);box-shadow:0 12px 30px #48bb7880}.advanced-settings{background:var(--bg-section);border-radius:20px;padding:0;margin-top:30px;border:2px solid var(--border-color);overflow:hidden;box-shadow:0 10px 30px var(--shadow-sm);transition:all .3s ease}.advanced-settings-header{background:var(--bg-input);color:var(--text-primary);display:flex;align-items:center;justify-content:space-between;cursor:pointer;padding:20px 25px;transition:all .3s ease;border-bottom:1px solid var(--border-color)}.advanced-settings-header:hover{background:var(--bg-section)}.advanced-settings-title{font-size:1.3rem;font-weight:700;display:flex;align-items:center;gap:12px;transition:color .3s ease}.toggle-icon{font-size:1.5rem;transition:transform .4s ease;font-weight:700;color:var(--text-muted)}.toggle-icon.rotated{transform:rotate(180deg)}.advanced-content{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 25px;background:var(--bg-section)}.advanced-content.expanded{max-height:800px;padding:25px;overflow:visible}canvas,video{display:none}.loading{display:flex;align-items:center;justify-content:center;gap:15px;color:var(--text-primary);font-weight:700;font-size:1.1rem;transition:color .3s ease}.spinner{width:24px;height:24px;border:3px solid var(--border-color);border-top:3px solid var(--primary-green);border-radius:50%;animation:spin 1s linear infinite}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.zif-how-to{margin-top:40px;padding:30px;background:var(--bg-section);border-radius:15px;border:2px solid var(--border-color);transition:all .3s ease}.zif-how-to h2{color:var(--text-primary);font-size:1.8rem;margin-bottom:25px;transition:color .3s ease}.how-to-steps{list-style:none;padding:0;margin:0;counter-reset:step-counter}.how-to-steps li{margin-bottom:20px;padding-left:40px;position:relative;color:var(--text-secondary);line-height:1.6;transition:color .3s ease}.how-to-steps li:before{counter-increment:step-counter;content:counter(step-counter);position:absolute;left:0;top:0;background:linear-gradient(135deg,var(--primary-green),var(--primary-green-dark));color:#fff;width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem}.how-to-steps strong{color:var(--text-primary);display:block;margin-bottom:5px;transition:color .3s ease}.how-to-steps p{margin:0;color:var(--text-muted);transition:color .3s ease}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media(max-width:768px){.settings-grid{grid-template-columns:1fr}.content{padding:25px 20px}.dark-mode-toggle{top:10px;right:10px;padding:10px 16px;font-size:.85rem}.zif-how-to{padding:20px}.how-to-steps li{padding-left:35px}}.site-header{background:var(--bg-container);border-bottom:2px solid var(--border-color);padding:20px 0;position:sticky;top:0;z-index:100;transition:all .3s ease;box-shadow:0 2px 10px var(--shadow-sm)}.header-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center}.logo a{text-decoration:none;display:flex;align-items:center}.logo h1{margin:0;font-size:1.8rem;font-weight:700;color:var(--text-primary);transition:color .3s ease}.logo a:hover h1{color:var(--primary-green)}.main-nav ul{list-style:none;margin:0;padding:0;display:flex;gap:30px;align-items:center}.main-nav a{text-decoration:none;color:var(--text-secondary);font-weight:600;font-size:1rem;transition:all .3s ease;padding:8px 16px;border-radius:8px}.main-nav a:hover,.main-nav a.active{color:var(--primary-green);background:var(--bg-section)}.site-content{min-height:calc(100vh - 200px)}.site-footer{background:var(--bg-footer, #f8f9fb);color:var(--text-secondary, #334155);border-top:1px solid var(--border-color, #e5e7eb);padding:40px 0}.footer-container{max-width:960px;margin:0 auto;padding:0 20px;position:relative;display:flex;justify-content:center;align-items:center}.footer-content{text-align:center}.footer-content p{margin:6px 0;font-size:.95rem;line-height:1.6}.footer-links{display:inline-flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:center}.footer-links a{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:inherit;transition:color .2s ease,opacity .2s ease}.footer-links a:hover{opacity:.85}.github-icon{width:18px;height:18px;fill:currentColor;vertical-align:middle}.dark-mode-toggle{position:absolute;right:20px;top:50%;transform:translateY(-50%);display:inline-flex;align-items:center;gap:8px;background:transparent;color:currentColor;border:1px solid currentColor;border-radius:999px;padding:8px 16px;font-weight:600;cursor:pointer;transition:background .2s ease,transform .1s ease,color .2s ease,border-color .2s ease}.dark-mode-toggle:hover{background:#0000000f}.dark-mode .site-footer{background:var(--bg-footer-dark, #0b1220);color:var(--text-secondary-dark, #c9d1d9);border-top-color:var(--border-color-dark, #263042)}.dark-mode .dark-mode-toggle{color:#fff;border-color:#ffffffe6;background:#ffffff0f;box-shadow:0 0 0 1px #ffffff0a inset}.dark-mode .dark-mode-toggle:hover{background:#ffffff1f}.dark-mode-toggle:focus-visible{outline:2px solid currentColor;outline-offset:3px}@media(max-width:600px){.footer-container{flex-direction:column;align-items:center}.dark-mode-toggle{position:static;transform:none;margin-top:12px}}.hamburger-menu{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:10px;z-index:101;transition:transform .3s ease}.hamburger-menu span{width:25px;height:3px;background-color:var(--text-primary);border-radius:3px;transition:all .3s ease}.hamburger-menu:hover span{background-color:var(--primary-green)}.hamburger-menu.active span:nth-child(1){transform:rotate(45deg) translate(7px,7px)}.hamburger-menu.active span:nth-child(2){opacity:0}.hamburger-menu.active span:nth-child(3){transform:rotate(-45deg) translate(7px,-7px)}@media(max-width:768px){.hamburger-menu{display:flex}.header-container{position:relative}.main-nav{position:absolute;top:100%;left:0;right:0;background:var(--bg-container);border-top:1px solid var(--border-color);box-shadow:0 4px 10px var(--shadow-sm);max-height:0;overflow:hidden;opacity:0;transition:max-height .3s ease,opacity .3s ease}.main-nav.active{max-height:300px;opacity:1}.main-nav ul{flex-direction:column;width:100%;gap:0;padding:10px 0}.main-nav li{width:100%}.main-nav a{display:block;width:100%;text-align:center;padding:15px 20px;border-radius:0}.main-nav a:hover{background:var(--bg-section-hover)}}.page-layout{padding:40px 20px;max-width:1200px;margin:0 auto}.page-content-wrapper{background:var(--bg-container);border-radius:20px;padding:60px;box-shadow:0 10px 40px var(--shadow-sm);transition:all .3s ease}:root{--page-bg: #ffffff;--page-text: #2c3e50;--page-text-secondary: #4a5568;--page-text-muted: #718096;--page-border: #e2e8f0;--page-shadow: rgba(0, 0, 0, .06)}.dark-mode{--page-bg: #2d3748;--page-text: #ffffff;--page-text-secondary: #f7fafc;--page-text-muted: #e2e8f0;--page-border: #4a5568;--page-shadow: rgba(0, 0, 0, .3)}.page-container{max-width:900px;margin:0 auto;padding:30px 20px}.page-hero{text-align:center;margin-bottom:60px;padding-bottom:40px;border-bottom:2px solid var(--page-border);transition:border-color .3s ease}.page-title{font-size:3rem;font-weight:700;color:var(--page-text);margin-bottom:15px;transition:color .3s ease}.page-subtitle{font-size:1.3rem;color:var(--page-text-muted);margin:0;transition:color .3s ease}.content-section{margin-bottom:60px}.content-section h2{font-size:2rem;color:var(--page-text);margin-bottom:25px;font-weight:700;transition:color .3s ease}.content-section p{font-size:1.1rem;line-height:1.8;color:var(--page-text-secondary);margin-bottom:20px;transition:color .3s ease}.features-list{display:grid;gap:30px;margin-top:40px}.feature-item{background:var(--page-bg);padding:35px;border-radius:12px;box-shadow:0 2px 12px var(--page-shadow);border:2px solid transparent;transition:all .3s}.feature-item:hover{border-color:#6b9b7c;box-shadow:0 4px 20px #6b9b7c26;transform:translateY(-3px)}.feature-icon-large{font-size:3.5rem;margin-bottom:20px}.feature-item h3{font-size:1.5rem;color:var(--page-text);margin-bottom:15px;font-weight:600;transition:color .3s ease}.feature-item p{color:var(--page-text-secondary);font-size:1rem;line-height:1.7;margin:0;transition:color .3s ease}.check-list,.tech-list{list-style:none;padding:0;margin:25px 0}.check-list li,.tech-list li{font-size:1.1rem;line-height:2;color:var(--page-text-secondary);padding-left:10px;transition:color .3s ease}.tech-list{padding-left:30px}.tech-list strong{color:var(--page-text);transition:color .3s ease}.privacy-points{display:grid;gap:20px;margin:30px 0}.privacy-point{display:flex;align-items:start;gap:20px;background:var(--page-bg);padding:25px;border-radius:12px;box-shadow:0 2px 8px var(--page-shadow);transition:all .3s ease}.point-icon{font-size:2.5rem;flex-shrink:0}.point-content h4{margin:0 0 8px;font-size:1.2rem;color:var(--page-text);transition:color .3s ease}.point-content p{margin:0;font-size:1rem;color:var(--page-text-secondary);line-height:1.6;transition:color .3s ease}.privacy-note{margin-top:30px;padding:20px;background:var(--page-bg);border-left:4px solid #6B9B7C;border-radius:4px;transition:background .3s ease}.privacy-note a{color:#6b9b7c;text-decoration:none;font-weight:600}.privacy-note a:hover{text-decoration:underline}.cta-box{margin:30px 0;text-align:center}.cta-button{display:inline-flex;align-items:center;gap:10px;background:linear-gradient(135deg,#2c3e50,#1a202c);color:#fff;padding:15px 35px;border-radius:50px;text-decoration:none;font-weight:600;font-size:1.1rem;transition:all .3s;box-shadow:0 4px 15px #2c3e504d}.cta-button:hover{transform:translateY(-3px);box-shadow:0 6px 25px #2c3e5066}.cta-button .github-icon{filter:brightness(0) invert(1)}.cta-section{text-align:center;background:linear-gradient(135deg,#6b9b7c,#4a7c59);padding:60px 40px;border-radius:16px;color:#fff;margin-top:80px}.cta-section h2{color:#fff;margin-bottom:15px}.cta-section p{color:#ffffffe6;font-size:1.2rem;margin-bottom:30px}.start-button{display:inline-block;background:#fff;color:#2c3e50;padding:18px 45px;border-radius:50px;text-decoration:none;font-weight:700;font-size:1.2rem;transition:all .3s;box-shadow:0 4px 20px #0003}.start-button:hover{transform:translateY(-3px);box-shadow:0 6px 30px #0000004d}@media(max-width:768px){.page-content-wrapper{padding:30px 20px}.page-container{padding:40px 15px}.page-title{font-size:2.5rem}.page-subtitle{font-size:1.1rem}.content-section h2{font-size:1.7rem}.feature-item{padding:25px 20px}.privacy-point{flex-direction:column;text-align:center}.cta-section{padding:40px 25px}}.blog-container{max-width:1200px;margin:0 auto;padding:40px 20px}.blog-header{text-align:center;margin-bottom:60px;padding-bottom:40px;border-bottom:2px solid var(--border-color);transition:border-color .3s ease}.blog-header h1{font-size:3rem;font-weight:700;color:var(--text-primary);margin-bottom:15px;transition:color .3s ease}.blog-description{font-size:1.2rem;color:var(--text-muted);margin:0;transition:color .3s ease}.posts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:30px;margin-bottom:60px}.post-card{background:var(--bg-container);border-radius:12px;overflow:hidden;box-shadow:0 2px 12px var(--shadow-sm);transition:all .3s ease;display:flex;flex-direction:column;height:100%}.post-card:hover{transform:translateY(-5px);box-shadow:0 8px 25px var(--shadow-md)}.post-thumbnail{width:100%;height:200px;overflow:hidden;background:var(--bg-section)}.post-thumbnail img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease}.post-card:hover .post-thumbnail img{transform:scale(1.05)}.post-content{padding:25px;display:flex;flex-direction:column;flex-grow:1}.post-meta{display:flex;align-items:center;gap:12px;margin-bottom:15px;font-size:.9rem;color:var(--text-muted);flex-wrap:wrap}.post-meta time{color:var(--text-muted);transition:color .3s ease}.post-category{background:linear-gradient(135deg,var(--primary-green) 0%,var(--primary-green-dark) 100%);color:#fff;padding:4px 12px;border-radius:20px;font-size:.85rem;font-weight:600}.post-title{font-size:1.5rem;font-weight:700;margin:0 0 15px;line-height:1.4}.post-title a{color:var(--text-primary);text-decoration:none;transition:color .3s ease}.post-title a:hover{color:var(--primary-green)}.post-excerpt{color:var(--text-secondary);line-height:1.6;margin-bottom:20px;flex-grow:1;transition:color .3s ease}.read-more{display:inline-flex;align-items:center;color:var(--primary-green);text-decoration:none;font-weight:600;transition:all .3s ease;align-self:flex-start}.read-more:hover{color:var(--primary-green-dark);transform:translate(5px)}.no-posts{text-align:center;padding:80px 20px;background:var(--bg-section);border-radius:12px;margin-top:40px}.no-posts p{font-size:1.2rem;color:var(--text-muted);margin:0;transition:color .3s ease}@media(max-width:768px){.blog-container{padding:30px 15px}.blog-header h1{font-size:2.5rem}.blog-description{font-size:1.1rem}.posts-grid{grid-template-columns:1fr;gap:20px}.post-content{padding:20px}.post-title{font-size:1.3rem}}@media(min-width:769px)and (max-width:1024px){.posts-grid{grid-template-columns:repeat(2,1fr)}}.loading-indicator{display:flex;flex-direction:column;align-items:center;gap:15px;padding:20px}.loading-text{font-size:1.1rem;font-weight:600;color:var(--text-primary);transition:color .3s ease}.spinner{width:40px;height:40px;border:4px solid var(--border-color);border-top-color:var(--primary-green);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.progress-message{display:flex;flex-direction:column;align-items:center;gap:20px;padding:60px 20px;text-align:center}.progress-message .spinner{width:50px;height:50px;border-width:5px}.progress-message .message{font-size:1.2rem;font-weight:600;color:var(--text-primary);transition:color .3s ease}.loading-spinner{display:inline-block;width:16px;height:16px;border:2px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;margin-right:8px;vertical-align:middle}.upload-section.loading{pointer-events:none;opacity:.7;transition:opacity .3s ease}#preview img{animation:fadeIn .3s ease-in forwards}html{scroll-behavior:smooth}.progress-bar-container{width:100%;max-width:400px;height:8px;background:var(--bg-section);border-radius:10px;overflow:hidden;margin:15px 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