:root{--bg-page: #f8fafc;--bg-card: #ffffff;--bg-card-subtle: #f1f5f9;--bg-elevated: #ffffff;--border: #e2e8f0;--border-focus: #3b82f6;--border-hover: #cbd5e1;--text-primary: #0f172a;--text-secondary: #475569;--text-muted: #64748b;--text-inverse: #ffffff;--accent-primary: #2563eb;--accent-hover: #1d4ed8;--accent-subtle: #eff6ff;--accent-border: #bfdbfe;--success: #10b981;--success-bg: #ecfdf5;--success-border: #a7f3d0;--success-text: #065f46;--error: #ef4444;--error-bg: #fef2f2;--error-border: #fecaca;--error-text: #991b1b;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .07), 0 2px 4px -2px rgba(0, 0, 0, .05);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .08), 0 4px 6px -4px rgba(0, 0, 0, .04);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-full: 9999px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-normal: .25s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--bg-page: #0b0f17;--bg-card: #131b26;--bg-card-subtle: #1a2332;--bg-elevated: #1e293b;--border: #223044;--border-focus: #60a5fa;--border-hover: #33445c;--text-primary: #f8fafc;--text-secondary: #cbd5e1;--text-muted: #94a3b8;--text-inverse: #0b0f17;--accent-primary: #3b82f6;--accent-hover: #60a5fa;--accent-subtle: #172554;--accent-border: #1e3a8a;--success: #34d399;--success-bg: #064e3b;--success-border: #047857;--success-text: #a7f3d0;--error: #f87171;--error-bg: #450a0a;--error-border: #7f1d1d;--error-text: #fecaca;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .4);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .3), 0 2px 4px -2px rgba(0, 0, 0, .2);--shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, .5)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-sans);font-size:16px;line-height:1.5;color:var(--text-primary);background-color:var(--bg-page);scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{min-height:100vh;display:flex;flex-direction:column;background-color:var(--bg-page);color:var(--text-primary);transition:background-color var(--transition-normal),color var(--transition-normal)}a{color:inherit;text-decoration:none}button,input,select{font-family:inherit}button{cursor:pointer;border:none;background:none}img,svg{display:block;max-width:100%}:focus-visible{outline:2px solid var(--border-focus);outline-offset:2px}.container{width:100%;max-width:1060px;margin:0 auto;padding:0 1.25rem}.site-header{position:sticky;top:0;z-index:50;background-color:var(--bg-page);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:background-color var(--transition-normal),border-color var(--transition-normal)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}.logo{display:flex;align-items:center;gap:.6rem;font-size:1.25rem;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.logo-icon{width:32px;height:32px;border-radius:var(--radius-sm);background:linear-gradient(135deg,#2563eb,#3b82f6);display:flex;align-items:center;justify-content:center;color:#fff;box-shadow:0 2px 4px #2563eb4d}.nav-links{display:flex;align-items:center;gap:1.5rem;list-style:none}.nav-link{font-size:.9rem;font-weight:600;color:var(--text-secondary);transition:color var(--transition-fast)}.nav-link:hover,.nav-link.active{color:var(--accent-primary)}.nav-right{display:flex;align-items:center;gap:.75rem}.theme-toggle-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius-md);color:var(--text-secondary);background-color:var(--bg-card);border:1px solid var(--border);transition:all var(--transition-fast)}.theme-toggle-btn:hover{color:var(--text-primary);border-color:var(--border-hover);background-color:var(--bg-card-subtle)}.breadcrumb-nav{padding:1.25rem 0 0}.breadcrumb-list{display:flex;align-items:center;gap:.5rem;list-style:none;font-size:.825rem;color:var(--text-muted)}.breadcrumb-list a{color:var(--text-secondary);transition:color var(--transition-fast)}.breadcrumb-list a:hover{color:var(--accent-primary)}.breadcrumb-sep{opacity:.5}.hero-section{padding:2.25rem 0 1.25rem;text-align:center}.hero-title{font-size:clamp(2rem,3.5vw + 1rem,2.75rem);font-weight:800;line-height:1.15;letter-spacing:-.03em;color:var(--text-primary);margin-bottom:.6rem}.hero-subtitle{font-size:clamp(1rem,1.2vw + .5rem,1.125rem);color:var(--text-secondary);max-width:680px;margin:0 auto 1.25rem;line-height:1.5}.trust-badges{display:inline-flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:.75rem 1.25rem;padding:.4rem 1.1rem;background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-full);font-size:.825rem;font-weight:500;color:var(--text-muted);box-shadow:var(--shadow-sm)}.trust-item{display:flex;align-items:center;gap:.35rem}.trust-item svg{color:var(--accent-primary)}.privacy-badge{display:inline-flex;align-items:center;gap:.5rem;margin:1.25rem auto 0;padding:.4rem .9rem;border-radius:var(--radius-full);background-color:var(--accent-subtle);border:1px solid var(--accent-border);color:var(--accent-primary);font-size:.85rem;font-weight:600;cursor:pointer;transition:transform var(--transition-fast),background-color var(--transition-fast)}.privacy-badge:hover{transform:translateY(-1px)}.converter-container{padding:.75rem 0 3rem}.converter-card{background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:2rem;position:relative;transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.dropzone{border:2px dashed var(--border);border-radius:var(--radius-md);padding:3rem 1.5rem;text-align:center;cursor:pointer;background-color:var(--bg-card-subtle);transition:all var(--transition-fast);position:relative}.dropzone:hover,.dropzone.dragover{border-color:var(--accent-primary);background-color:var(--accent-subtle);transform:scale(1.002)}.dropzone-content{display:flex;flex-direction:column;align-items:center;gap:.75rem;pointer-events:none}.upload-icon-wrapper{width:56px;height:56px;border-radius:var(--radius-full);background-color:var(--bg-card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--accent-primary);box-shadow:var(--shadow-sm)}.dropzone-title{font-size:1.15rem;font-weight:700;color:var(--text-primary)}.dropzone-subtitle{font-size:.9rem;color:var(--text-muted)}.btn-choose-file{display:inline-flex;align-items:center;gap:.5rem;margin-top:.5rem;padding:.6rem 1.25rem;font-size:.9rem;font-weight:600;color:var(--text-inverse);background-color:var(--accent-primary);border-radius:var(--radius-md);pointer-events:auto;transition:background-color var(--transition-fast),transform var(--transition-fast)}.btn-choose-file:hover{background-color:var(--accent-hover);transform:translateY(-1px)}.format-tags{margin-top:.5rem;font-size:.775rem;color:var(--text-muted)}.file-input-hidden{position:absolute;top:0;left:0;width:100%;height:100%;opacity:0;cursor:pointer}.file-preview-card{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;background-color:var(--bg-card-subtle);border:1px solid var(--border);border-radius:var(--radius-md);margin-bottom:1.75rem}.file-preview-left{display:flex;align-items:center;gap:1rem;min-width:0}.file-thumbnail{width:52px;height:52px;border-radius:var(--radius-sm);object-fit:contain;background:var(--bg-card);border:1px solid var(--border);background-image:linear-gradient(45deg,#e2e8f0 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var(--error-border);border-radius:var(--radius-sm);transition:all var(--transition-fast)}.btn-remove-file:hover{filter:brightness(.95)}.config-group{margin-top:1.75rem;padding-top:1.5rem;border-top:1px solid var(--border)}.config-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:.9rem}.config-title{font-size:.95rem;font-weight:700;color:var(--text-primary);display:flex;align-items:center;gap:.45rem}.size-actions{display:flex;gap:.5rem}.btn-text-action{font-size:.8rem;font-weight:600;color:var(--accent-primary);padding:.2rem .5rem;border-radius:var(--radius-sm);transition:background-color var(--transition-fast)}.btn-text-action:hover{background-color:var(--accent-subtle)}.sizes-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:.75rem}.size-card{position:relative;display:flex;flex-direction:column;padding:.75rem .85rem;border:1px solid var(--border);border-radius:var(--radius-md);background-color:var(--bg-card);cursor:pointer;transition:all var(--transition-fast);user-select:none}.size-card:hover{border-color:var(--border-hover);background-color:var(--bg-card-subtle)}.size-card.selected{border-color:var(--accent-primary);background-color:var(--accent-subtle);box-shadow:0 0 0 1px var(--accent-primary)}.size-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:.25rem}.size-label{font-size:.95rem;font-weight:700;color:var(--text-primary)}.size-checkbox{width:18px;height:18px;border-radius:4px;accent-color:var(--accent-primary);cursor:pointer}.size-desc{font-size:.725rem;color:var(--text-muted);line-height:1.25}.options-columns{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem;margin-top:1.5rem}.option-subgroup{display:flex;flex-direction:column;gap:.6rem}.option-label{font-size:.85rem;font-weight:700;color:var(--text-primary)}.radio-pills{display:flex;gap:.5rem;background-color:var(--bg-card-subtle);padding:.3rem;border-radius:var(--radius-md);border:1px solid var(--border)}.radio-pill-item{flex:1;text-align:center}.radio-pill-item input{display:none}.radio-pill-item label{display:block;padding:.45rem 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25%),linear-gradient(-45deg,#ccc 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#ccc 75%),linear-gradient(-45deg,transparent 75%,#ccc 75%);background-size:6px 6px;background-position:0 0,0 3px,3px -3px,-3px 0px}.custom-color-wrapper{display:flex;align-items:center;gap:.4rem}.native-color-picker{width:32px;height:32px;padding:0;border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;background:none}.converter-cta-row{margin-top:2rem;display:flex;flex-direction:column;align-items:center;gap:.75rem}.btn-convert-primary{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;width:100%;max-width:380px;padding:.9rem 1.75rem;font-size:1.05rem;font-weight:700;color:var(--text-inverse);background:linear-gradient(135deg,#2563eb,#1d4ed8);border-radius:var(--radius-md);box-shadow:0 4px 12px #2563eb40;transition:all var(--transition-fast)}.btn-convert-primary:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 6px 18px #2563eb59;filter:brightness(1.05)}.btn-convert-primary:disabled{opacity:.5;cursor:not-allowed}.error-banner{display:flex;align-items:center;gap:.75rem;padding:.85rem 1.15rem;background-color:var(--error-bg);border:1px solid var(--error-border);color:var(--error-text);border-radius:var(--radius-md);font-size:.875rem;margin-top:1rem}.result-card{padding:2rem 1.5rem;text-align:center;display:flex;flex-direction:column;align-items:center;gap:1.5rem}.success-badge{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1.2rem;background-color:var(--success-bg);border:1px solid var(--success-border);color:var(--success-text);font-size:1rem;font-weight:700;border-radius:var(--radius-full)}.result-metrics{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:1rem 1.5rem;padding:1rem 1.5rem;background-color:var(--bg-card-subtle);border:1px solid var(--border);border-radius:var(--radius-md);width:100%;max-width:620px}.metric-item{display:flex;flex-direction:column;align-items:center}.metric-val{font-size:1.1rem;font-weight:700;color:var(--text-primary)}.metric-label{font-size:.75rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-top:.15rem}.previews-grid{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:center;gap:1rem;padding:1.25rem;background-color:var(--bg-card-subtle);border:1px solid var(--border);border-radius:var(--radius-md)}.preview-frame-item{display:flex;flex-direction:column;align-items:center;gap:.4rem}.preview-canvas-box{background-color:#fff;background-image:linear-gradient(45deg,#e2e8f0 25%,transparent 25%),linear-gradient(-45deg,#e2e8f0 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e2e8f0 75%),linear-gradient(-45deg,transparent 75%,#e2e8f0 75%);background-size:8px 8px;background-position:0 0,0 4px,4px -4px,-4px 0px;border:1px solid var(--border);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;padding:4px}[data-theme=dark] .preview-canvas-box{background-color:#1e293b;background-image:linear-gradient(45deg,#0f172a 25%,transparent 25%),linear-gradient(-45deg,#0f172a 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#0f172a 75%),linear-gradient(-45deg,transparent 75%,#0f172a 75%)}.btn-download-ico{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;padding:.9rem 2rem;font-size:1.05rem;font-weight:700;color:var(--text-inverse);background:linear-gradient(135deg,#10b981,#059669);border-radius:var(--radius-md);box-shadow:0 4px 12px #10b98140;transition:all var(--transition-fast)}.btn-download-ico:hover{transform:translateY(-2px);filter:brightness(1.05)}.btn-convert-another{display:inline-flex;align-items:center;gap:.5rem;padding:.85rem 1.5rem;font-size:.95rem;font-weight:600;color:var(--text-primary);background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);transition:all var(--transition-fast)}.btn-convert-another:hover{background-color:var(--bg-card-subtle);border-color:var(--border-hover)}.extracted-frames-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.25rem;width:100%;margin:1.5rem 0}.extracted-frame-card{display:flex;flex-direction:column;align-items:center;padding:1.25rem;background-color:var(--bg-card-subtle);border:1px solid var(--border);border-radius:var(--radius-md);gap:.75rem;text-align:center}.extracted-preview-box{width:110px;height:110px;display:flex;align-items:center;justify-content:center;background-color:#fff;background-image:linear-gradient(45deg,#e2e8f0 25%,transparent 25%),linear-gradient(-45deg,#e2e8f0 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e2e8f0 75%),linear-gradient(-45deg,transparent 75%,#e2e8f0 75%);background-size:10px 10px;background-position:0 0,0 5px,5px -5px,-5px 0px;border:1px solid var(--border);border-radius:var(--radius-sm)}[data-theme=dark] .extracted-preview-box{background-color:#1e293b;background-image:linear-gradient(45deg,#0f172a 25%,transparent 25%),linear-gradient(-45deg,#0f172a 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#0f172a 75%),linear-gradient(-45deg,transparent 75%,#0f172a 75%)}.extracted-dims{font-weight:700;font-size:1rem;color:var(--text-primary)}.extracted-meta{font-size:.775rem;color:var(--text-muted);margin-top:.1rem}.btn-download-frame{display:inline-flex;align-items:center;justify-content:center;gap:.4rem;padding:.5rem 1rem;font-size:.85rem;font-weight:600;color:var(--text-inverse);background-color:var(--accent-primary);border-radius:var(--radius-sm);width:100%;transition:background-color var(--transition-fast)}.btn-download-frame:hover{background-color:var(--accent-hover)}.tool-controls-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem;margin-top:1.5rem;padding-top:1.5rem;border-top:1px solid var(--border)}.form-field{display:flex;flex-direction:column;gap:.5rem}.form-label{font-size:.875rem;font-weight:700;color:var(--text-primary);display:flex;align-items:center;justify-content:space-between}.input-styled{width:100%;padding:.65rem .85rem;font-size:.95rem;border:1px solid var(--border);border-radius:var(--radius-md);background-color:var(--bg-card);color:var(--text-primary);transition:border-color var(--transition-fast)}.input-styled:focus{border-color:var(--border-focus)}.range-slider{width:100%;accent-color:var(--accent-primary);cursor:pointer;height:6px;border-radius:var(--radius-full)}.checkbox-label{display:flex;align-items:center;gap:.5rem;font-size:.85rem;color:var(--text-secondary);font-weight:600;cursor:pointer;margin-top:.25rem}.checkbox-label input{accent-color:var(--accent-primary);width:16px;height:16px}.savings-badge{display:inline-flex;align-items:center;padding:.25rem .65rem;border-radius:var(--radius-full);background-color:var(--success-bg);color:var(--success-text);font-weight:700;font-size:.9rem}.preview-image-result{max-height:320px;max-width:100%;border-radius:var(--radius-md);border:1px solid var(--border);object-fit:contain;box-shadow:var(--shadow-sm)}.related-tools-section{padding:3rem 0;border-top:1px solid var(--border)}.related-title{font-size:1.5rem;font-weight:800;letter-spacing:-.02em;color:var(--text-primary);margin-bottom:.5rem}.related-subtitle{font-size:.95rem;color:var(--text-muted);margin-bottom:1.75rem}.related-tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.25rem}.related-tool-card{padding:1.25rem;background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;justify-content:space-between;transition:all var(--transition-fast)}.related-tool-card:hover{transform:translateY(-2px);border-color:var(--accent-primary);box-shadow:var(--shadow-md)}.tool-card-title{font-size:1.05rem;font-weight:700;color:var(--text-primary);margin-bottom:.4rem;display:flex;align-items:center;justify-content:space-between}.tool-card-desc{font-size:.85rem;color:var(--text-secondary);line-height:1.4}.tool-card-cta{margin-top:1rem;font-size:.825rem;font-weight:700;color:var(--accent-primary);display:inline-flex;align-items:center;gap:.25rem}.seo-content-section{padding:3.5rem 0;border-top:1px solid var(--border)}.content-block{margin-bottom:3rem}.content-title{font-size:1.65rem;font-weight:800;letter-spacing:-.02em;color:var(--text-primary);margin-bottom:.85rem}.content-paragraph{font-size:1rem;color:var(--text-secondary);line-height:1.7;margin-bottom:1rem}.faq-section{padding:3rem 0 4rem;border-top:1px solid var(--border)}.faq-title{text-align:center;font-size:2rem;font-weight:800;letter-spacing:-.02em;color:var(--text-primary);margin-bottom:.5rem}.faq-subtitle{text-align:center;font-size:.95rem;color:var(--text-muted);margin-bottom:2.5rem}.faq-accordion{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:.75rem}.faq-item{border:1px solid var(--border);border-radius:var(--radius-md);background-color:var(--bg-card);overflow:hidden;transition:border-color var(--transition-fast)}.faq-item:hover{border-color:var(--border-hover)}.faq-trigger{width:100%;display:flex;align-items:center;justify-content:space-between;padding:1.1rem 1.25rem;font-size:.975rem;font-weight:700;color:var(--text-primary);text-align:left}.faq-trigger svg{color:var(--text-muted);transition:transform var(--transition-normal);flex-shrink:0}.faq-item.open .faq-trigger svg{transform:rotate(180deg);color:var(--accent-primary)}.faq-content{display:none;padding:0 1.25rem 1.1rem;font-size:.925rem;color:var(--text-secondary);line-height:1.6}.faq-item.open .faq-content{display:block}.modal-overlay{position:fixed;inset:0;z-index:100;background-color:#0009;backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:1.25rem;opacity:0;pointer-events:none;transition:opacity var(--transition-normal)}.modal-overlay.active{opacity:1;pointer-events:auto}.modal-card{width:100%;max-width:520px;background-color:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:2rem;transform:translateY(10px);transition:transform var(--transition-normal)}.modal-overlay.active .modal-card{transform:translateY(0)}.modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.modal-title{font-size:1.25rem;font-weight:800;color:var(--text-primary)}.btn-close-modal{font-size:1.25rem;color:var(--text-muted)}.site-footer{margin-top:auto;border-top:1px solid var(--border);background-color:var(--bg-card);padding:3rem 0 2rem}.footer-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:2rem;margin-bottom:2.5rem}.footer-brand{max-width:320px}.footer-desc{font-size:.875rem;color:var(--text-muted);margin-top:.75rem;line-height:1.5}.footer-nav-col h4{font-size:.85rem;font-weight:700;color:var(--text-primary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.85rem}.footer-nav-col ul{list-style:none;display:flex;flex-direction:column;gap:.5rem}.footer-nav-col a{font-size:.875rem;color:var(--text-muted);transition:color var(--transition-fast)}.footer-nav-col a:hover{color:var(--accent-primary)}.footer-bottom{padding-top:1.5rem;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem;font-size:.825rem;color:var(--text-muted)}@media(max-width:768px){.hero-section{padding:1.75rem 0 1rem}.converter-card{padding:1.25rem}.dropzone{padding:2rem 1rem}.file-preview-card{flex-direction:column;align-items:flex-start;gap:1rem}.btn-remove-file{width:100%;justify-content:center}.nav-links{display:none}.sizes-grid{grid-template-columns:repeat(2,1fr)}}