:root{--color-primary: #6366f1;--color-primary-hover: #4f46e5;--color-primary-light: #eef2ff;--color-secondary: #0ea5e9;--color-bg-primary: #ffffff;--color-bg-secondary: #f8fafc;--color-bg-tertiary: #f1f5f9;--color-bg-glass: rgba(255, 255, 255, .8);--color-text-primary: #0f172a;--color-text-secondary: #475569;--color-text-muted: #94a3b8;--color-border: #e2e8f0;--color-border-focus: #6366f1;--color-success: #10b981;--color-error: #ef4444;--color-warning: #f59e0b;--gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);--gradient-hero: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);--gradient-card: linear-gradient(145deg, rgba(255,255,255,.9) 0%, rgba(248,250,252,.9) 100%);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);--shadow-glow: 0 0 40px rgba(99, 102, 241, .15);--font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "Fira Code", "Consolas", monospace;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .25s ease;--transition-slow: .35s ease}[data-theme=dark]{--color-bg-primary: #0f172a;--color-bg-secondary: #1e293b;--color-bg-tertiary: #334155;--color-bg-glass: rgba(15, 23, 42, .85);--color-text-primary: #f8fafc;--color-text-secondary: #cbd5e1;--color-text-muted: #64748b;--color-border: #334155;--gradient-hero: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);--gradient-card: linear-gradient(145deg, rgba(30,41,59,.9) 0%, rgba(15,23,42,.9) 100%);--shadow-glow: 0 0 60px rgba(99, 102, 241, .2)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font-family);font-size:16px;line-height:1.6;color:var(--color-text-primary);background:var(--color-bg-secondary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:var(--color-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--color-primary-hover)}.app-container{min-height:100vh;display:flex;flex-direction:column}.header{position:sticky;top:0;z-index:100;background:var(--color-bg-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--color-border)}.header-content{max-width:1400px;margin:0 auto;padding:var(--space-md) var(--space-xl);display:flex;align-items:center;justify-content:space-between}.logo{display:flex;align-items:center;gap:var(--space-sm)}.logo-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:var(--gradient-primary);border-radius:var(--radius-md);color:#fff}.logo-icon svg{width:20px;height:20px}.logo-text{font-size:1.25rem;font-weight:700;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.header-nav{display:flex;align-items:center;gap:var(--space-lg)}.nav-link{color:var(--color-text-secondary);font-weight:500;font-size:.875rem}.nav-link:hover{color:var(--color-text-primary)}.hero{background:var(--gradient-hero);padding:var(--space-3xl) var(--space-xl);text-align:center}.hero-content{max-width:800px;margin:0 auto}.hero-badge{margin-bottom:var(--space-lg)}.badge{display:inline-block;padding:var(--space-xs) var(--space-md);background:var(--color-primary-light);color:var(--color-primary);font-size:.875rem;font-weight:600;border-radius:var(--radius-full)}[data-theme=dark] .badge{background:#6366f133}.hero-title{font-size:clamp(2rem,5vw,3.5rem);font-weight:800;line-height:1.2;margin-bottom:var(--space-lg);letter-spacing:-.02em}.gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:1.125rem;color:var(--color-text-secondary);max-width:600px;margin:0 auto var(--space-xl)}.hero-platforms{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-sm)}.platform-badge{padding:var(--space-xs) var(--space-sm);background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);font-size:.75rem;font-weight:500;color:var(--color-text-secondary)}.converter-section{padding:var(--space-2xl) var(--space-xl);flex:1}.converter-container{max-width:1400px;margin:0 auto;display:grid;grid-template-columns:minmax(340px,1fr) minmax(320px,420px) minmax(340px,1fr);gap:var(--space-xl);align-items:start}@media(max-width:1024px){.converter-container{grid-template-columns:1fr}}.panel{background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);overflow:hidden;transition:box-shadow var(--transition-base)}.panel:hover{box-shadow:var(--shadow-xl)}.panel-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md) var(--space-lg);background:var(--color-bg-secondary);border-bottom:1px solid var(--color-border)}.panel-title{display:flex;align-items:center;gap:var(--space-sm);font-size:.875rem;font-weight:600;color:var(--color-text-primary)}.panel-icon{width:18px;height:18px;color:var(--color-primary)}.panel-body{padding:var(--space-md)}.panel-footer{display:flex;align-items:center;justify-content:space-between;padding:var(--space-sm) var(--space-lg);background:var(--color-bg-secondary);border-top:1px solid var(--color-border)}.input-textarea{width:100%;min-height:400px;padding:var(--space-md);font-family:var(--font-mono);font-size:.875rem;line-height:1.7;color:var(--color-text-primary);background:var(--color-bg-primary);border:none;resize:vertical;outline:none}.input-textarea::placeholder{color:var(--color-text-muted)}.input-type-toggle{display:flex;gap:2px;padding:2px;background:var(--color-bg-tertiary);border-radius:var(--radius-sm)}.toggle-btn{padding:var(--space-xs) var(--space-md);font-size:.75rem;font-weight:500;color:var(--color-text-secondary);background:transparent;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition-fast)}.toggle-btn.active{background:var(--color-bg-primary);color:var(--color-text-primary);box-shadow:var(--shadow-sm)}.char-count{font-size:.75rem;color:var(--color-text-muted)}.action-panel{display:flex;flex-direction:column;gap:var(--space-lg);padding:var(--space-xl) 0}.convert-btn{padding:var(--space-lg) var(--space-2xl);display:flex;align-items:center;justify-content:center;gap:var(--space-sm);font-size:1rem;white-space:nowrap}.export-options{display:flex;flex-direction:column;gap:var(--space-md)}.option-group{display:flex;flex-direction:column;gap:var(--space-xs)}.option-label{font-size:.75rem;font-weight:500;color:var(--color-text-muted)}.option-check{display:flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--color-text-secondary)}.option-input{padding:var(--space-sm) var(--space-md);font-size:.875rem;color:var(--color-text-primary);background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:var(--radius-sm);outline:none;transition:border-color var(--transition-fast)}.option-input:focus{border-color:var(--color-border-focus)}.strict-debug-summary{padding:var(--space-md);background:var(--color-bg-primary);border:1px solid var(--color-border);border-left:4px solid var(--color-warning);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);font-size:.8125rem;line-height:1.5;color:var(--color-text-secondary)}.strict-debug-summary.hidden{display:none}.strict-debug-summary.ok{border-left-color:var(--color-success)}.strict-debug-title{margin-bottom:var(--space-xs);font-weight:700;color:var(--color-text-primary)}.strict-debug-message{font-family:var(--font-mono);font-size:.75rem}.strict-debug-summary.warn .strict-debug-message{color:var(--color-warning)}.preview-badge{font-size:.625rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;padding:2px 8px;background:var(--color-success);color:#fff;border-radius:var(--radius-full)}.preview-content{min-height:400px;padding:var(--space-lg);font-size:.9375rem;line-height:1.8;overflow-y:auto}.preview-placeholder{color:var(--color-text-muted);font-style:italic}.preview-content h1,.preview-content h2,.preview-content h3{margin-top:1.5em;margin-bottom:.5em;font-weight:600;line-height:1.3}.preview-content h1{font-size:1.75rem}.preview-content h2{font-size:1.375rem}.preview-content h3{font-size:1.125rem}.preview-content p{margin-bottom:1em}.preview-content pre{padding:var(--space-md);background:var(--color-bg-tertiary);border-radius:var(--radius-md);overflow-x:auto;font-family:var(--font-mono);font-size:.875rem;margin:1em 0}.preview-content code{font-family:var(--font-mono);font-size:.875em;padding:.2em .4em;background:var(--color-bg-tertiary);border-radius:var(--radius-sm)}.preview-content pre code{padding:0;background:none}.preview-content table{width:100%;border-collapse:collapse;margin:1em 0}.preview-content th,.preview-content td{padding:var(--space-sm) var(--space-md);text-align:left;border:1px solid var(--color-border)}.preview-content th{background:var(--color-bg-secondary);font-weight:600}.preview-content ul,.preview-content ol{padding-left:1.5em;margin-bottom:1em}.preview-content blockquote{border-left:4px solid var(--color-primary);padding-left:var(--space-md);margin:1em 0;color:var(--color-text-secondary);font-style:italic}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);font-family:var(--font-family);font-size:.875rem;font-weight:600;border-radius:var(--radius-md);border:none;cursor:pointer;transition:all var(--transition-fast)}.btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-md),0 0 20px #6366f14d}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg),0 0 30px #6366f166}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--color-bg-primary);color:var(--color-text-primary);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-bg-secondary)}.btn-ghost{background:transparent;color:var(--color-text-secondary)}.btn-ghost:hover{color:var(--color-text-primary);background:var(--color-bg-secondary)}.btn-sm{padding:var(--space-xs) var(--space-sm);font-size:.75rem}.btn-lg{padding:var(--space-md) var(--space-xl);font-size:1rem}.icon-sun,.icon-moon{width:16px;height:16px}.icon-moon,[data-theme=dark] .icon-sun{display:none}[data-theme=dark] .icon-moon{display:block}.features-section{padding:var(--space-3xl) var(--space-xl);background:var(--color-bg-primary)}.features-container{max-width:1200px;margin:0 auto}.section-title{text-align:center;font-size:2rem;font-weight:700;margin-bottom:var(--space-2xl)}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--space-xl)}.feature-card{padding:var(--space-xl);background:var(--gradient-card);border:1px solid var(--color-border);border-radius:var(--radius-lg);text-align:center;transition:transform var(--transition-base),box-shadow var(--transition-base)}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-xl)}.feature-icon{width:56px;height:56px;margin:0 auto var(--space-md);display:flex;align-items:center;justify-content:center;background:var(--color-primary-light);border-radius:var(--radius-lg);color:var(--color-primary)}[data-theme=dark] .feature-icon{background:#6366f133}.feature-icon svg{width:28px;height:28px}.feature-title{font-size:1.125rem;font-weight:600;margin-bottom:var(--space-sm)}.feature-desc{font-size:.875rem;color:var(--color-text-secondary);line-height:1.6}.how-section{padding:var(--space-3xl) var(--space-xl);background:var(--color-bg-secondary)}.how-container{max-width:800px;margin:0 auto}.steps-list{display:flex;flex-direction:column;gap:var(--space-lg)}.step{display:flex;align-items:flex-start;gap:var(--space-lg);padding:var(--space-lg);background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:var(--radius-lg)}.step-number{width:40px;height:40px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:var(--gradient-primary);color:#fff;font-size:1.125rem;font-weight:700;border-radius:var(--radius-full)}.step-content h3{font-size:1.125rem;font-weight:600;margin-bottom:var(--space-xs)}.step-content p{color:var(--color-text-secondary);font-size:.875rem}.footer{padding:var(--space-xl);background:var(--color-bg-primary);border-top:1px solid var(--color-border);text-align:center}.footer-content p{font-size:.875rem;color:var(--color-text-muted)}.toast{position:fixed;bottom:var(--space-xl);right:var(--space-xl);z-index:1000;animation:slideIn .3s ease}.toast.hidden{display:none}.toast-content{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-md) var(--space-lg);background:var(--color-bg-primary);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-xl);font-size:.875rem}.toast.success .toast-icon:before{content:"✓";color:var(--color-success)}.toast.error .toast-icon:before{content:"✕";color:var(--color-error)}.toast.warning .toast-icon:before{content:"!";color:var(--color-warning)}@keyframes slideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.loading-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1001;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:var(--space-lg);background:#00000080;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.loading-overlay.hidden{display:none}.loading-spinner{width:48px;height:48px;border:4px solid var(--color-bg-tertiary);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}.loading-text{color:#fff;font-weight:500}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:768px){.hero-title{font-size:2rem}.converter-container{gap:var(--space-lg)}.action-panel{order:1;padding:0}.input-panel{order:0}.preview-panel{order:2}}.footer-links{display:flex;justify-content:center;gap:var(--space-md);margin-top:var(--space-sm)}.footer-links a,.legal-content a{color:var(--color-primary);text-decoration:none}.footer-links a:hover,.legal-content a:hover{text-decoration:underline}.legal-page{min-height:100vh;background:var(--color-bg-secondary);color:var(--color-text-primary)}.legal-header{padding:var(--space-lg) var(--space-xl);border-bottom:1px solid var(--color-border);background:var(--color-bg-primary)}.legal-brand{display:inline-flex;align-items:center;gap:var(--space-sm);color:var(--color-text-primary);font-weight:700;text-decoration:none}.legal-brand-icon{display:grid;width:34px;height:34px;place-items:center;border-radius:var(--radius-sm);background:var(--gradient-primary);color:#fff}.legal-content{width:min(760px,calc(100% - 2rem));margin:0 auto;padding:var(--space-3xl) 0}.legal-content h1{margin-bottom:var(--space-sm);font-size:clamp(2rem,5vw,3.25rem);line-height:1.1}.legal-content section{margin-top:var(--space-2xl)}.legal-content h2{margin-bottom:var(--space-sm);font-size:1.25rem}.legal-content p{color:var(--color-text-secondary);line-height:1.75}.legal-eyebrow{margin-bottom:var(--space-sm);color:var(--color-primary)!important;font-weight:700;text-transform:uppercase;letter-spacing:.08em}.legal-updated{color:var(--color-text-muted)!important}.legal-back{display:inline-block;margin-top:var(--space-2xl);font-weight:600}.hidden{display:none!important}.account-button{min-width:92px;white-space:nowrap}.account-modal{position:fixed;top:0;right:0;bottom:0;left:0;z-index:1200;display:grid;place-items:center;padding:var(--space-lg);background:#0f172ab8;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}.account-dialog{position:relative;width:min(680px,100%);max-height:calc(100vh - 2rem);overflow-y:auto;padding:var(--space-2xl);border:1px solid var(--color-border);border-radius:var(--radius-xl);background:var(--color-bg-primary);box-shadow:var(--shadow-xl)}.account-close{position:absolute;top:var(--space-md);right:var(--space-md);width:38px;height:38px;border:0;border-radius:var(--radius-full);background:var(--color-bg-tertiary);color:var(--color-text-primary);cursor:pointer;font-size:1.5rem}.account-dialog-header{padding-right:var(--space-2xl);margin-bottom:var(--space-xl)}.account-dialog-header h2{margin:var(--space-xs) 0 var(--space-sm);font-size:1.75rem}.account-dialog-header p,.account-summary p,.pricing-card p,.pricing-note{color:var(--color-text-secondary)}.account-eyebrow,.pricing-badge{color:var(--color-primary)!important;font-size:.75rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.btn-google{width:100%;border:1px solid var(--color-border);background:var(--color-bg-primary);color:var(--color-text-primary)}.account-divider{display:flex;align-items:center;gap:var(--space-sm);margin:var(--space-lg) 0;color:var(--color-text-muted);font-size:.75rem}.account-divider:before,.account-divider:after{content:"";flex:1;height:1px;background:var(--color-border)}.account-label{display:block;margin:var(--space-md) 0 var(--space-xs);font-size:.8125rem;font-weight:600}.account-input{width:100%}.account-actions{display:flex;flex-wrap:wrap;gap:var(--space-sm);margin-top:var(--space-lg)}.account-text-action{margin-top:var(--space-md);border:0;background:transparent;color:var(--color-primary);cursor:pointer;font:inherit}.account-summary{padding:var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-secondary)}.account-summary p{margin:var(--space-xs) 0 0}.account-message{min-height:1.5em;margin:var(--space-md) 0;font-size:.8125rem}.account-message.error{color:var(--color-error)}.account-delete{color:#b42318}.account-message.success{color:var(--color-success)}.pricing-section{padding-top:var(--space-xl);border-top:1px solid var(--color-border)}.pricing-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--space-md);margin-top:var(--space-md)}.pricing-card{display:flex;flex-direction:column;gap:var(--space-sm);padding:var(--space-lg);border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-bg-secondary)}.pricing-card-featured{border-color:var(--color-primary);box-shadow:var(--shadow-glow)}.pricing-name{margin:0;color:var(--color-text-primary)!important;font-weight:700}.pricing-price{margin:0}.pricing-price span{color:var(--color-text-primary);font-size:1.6rem;font-weight:750}.pricing-card .btn{margin-top:auto}.pricing-note{margin:var(--space-md) 0 0;font-size:.75rem}.billing-result-page{min-height:100vh;display:grid;place-items:center;padding:var(--space-lg);background:var(--gradient-hero)}.billing-result-card{width:min(520px,100%);padding:var(--space-2xl);border:1px solid var(--color-border);border-radius:var(--radius-xl);background:var(--color-bg-primary);box-shadow:var(--shadow-xl);text-align:center}.billing-result-card .legal-brand-icon{margin:0 auto var(--space-lg)}.billing-result-card h1{margin:var(--space-sm) 0}.billing-result-card p{color:var(--color-text-secondary)}.billing-result-card .btn{display:block;width:100%;margin:var(--space-lg) 0 var(--space-md)}.billing-result-card a{color:var(--color-primary)}@media(min-width:900px){.account-dialog{width:min(980px,100%);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:var(--space-2xl)}.account-dialog-header{grid-column:1 / -1}#accountSignedOut,#accountSignedIn,#accountMessage{grid-column:1}.pricing-section{grid-column:2;grid-row:2 / span 3;padding-top:0;padding-left:var(--space-2xl);border-top:0;border-left:1px solid var(--color-border)}.pricing-grid{grid-template-columns:1fr}}@media(max-width:768px){.header-nav .nav-link{display:none}.account-dialog{padding:var(--space-xl)}.pricing-grid{grid-template-columns:1fr}}