:root{--primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#3b82f6;--primary-glow:rgba(37,99,235,0.15);--primary-subtle:rgba(37,99,235,0.06);--bg:#f8fafc;--bg-secondary:#f1f5f9;--white:#fff;--dark:#0f172a;--text:#334155;--text-light:#64748b;--text-muted:#94a3b8;--border:#e2e8f0;--border-hover:#cbd5e1;--shadow:0 1px 3px rgba(0,0,0,0.1);--shadow-md:0 4px 12px rgba(0,0,0,0.08);--shadow-lg:0 10px 30px rgba(0,0,0,0.1);--shadow-card-hover:0 8px 24px rgba(37,99,235,0.12),0 4px 8px rgba(0,0,0,0.06);--radius:8px;--radius-lg:12px;--radius-xl:16px;--max-w:1200px;--success:#16a34a;--success-light:rgba(22,163,74,0.1);--error:#dc2626;--error-light:rgba(220,38,38,0.1);--warning:#f59e0b;--warning-light:rgba(245,158,11,0.1);--gradient-primary:linear-gradient(135deg,#2563eb 0%,#7c3aed 100%);--gradient-icon:linear-gradient(135deg,#3b82f6 0%,#8b5cf6 100%);--gradient-hero:linear-gradient(135deg,#1d4ed8 0%,#7c3aed 50%,#2563eb 100%);--transition-fast:0.15s ease;--transition-base:0.2s ease;--transition-slow:0.3s ease;--body-pattern:radial-gradient(circle at 1px 1px,rgba(0,0,0,0.03) 1px,transparent 0);--body-pattern-size:24px 24px;--footer-bg:#0f172a;--footer-text:#94a3b8;--footer-border:#1e293b;--scrollbar-track:#f1f5f9;--scrollbar-thumb:#cbd5e1;--scrollbar-thumb-hover:#94a3b8}[data-theme="dark"]{--primary:#3b82f6;--primary-dark:#2563eb;--primary-light:#60a5fa;--primary-glow:rgba(59,130,246,0.2);--primary-subtle:rgba(59,130,246,0.08);--bg:#0f172a;--bg-secondary:#1e293b;--white:#1e293b;--dark:#f1f5f9;--text:#cbd5e1;--text-light:#94a3b8;--text-muted:#64748b;--border:#334155;--border-hover:#475569;--shadow:0 1px 3px rgba(0,0,0,0.3);--shadow-md:0 4px 12px rgba(0,0,0,0.25);--shadow-lg:0 10px 30px rgba(0,0,0,0.35);--shadow-card-hover:0 8px 24px rgba(59,130,246,0.15),0 4px 8px rgba(0,0,0,0.2);--success:#22c55e;--success-light:rgba(34,197,94,0.15);--error:#ef4444;--error-light:rgba(239,68,68,0.15);--warning:#fbbf24;--warning-light:rgba(251,191,36,0.15);--gradient-primary:linear-gradient(135deg,#3b82f6 0%,#8b5cf6 100%);--gradient-icon:linear-gradient(135deg,#60a5fa 0%,#a78bfa 100%);--gradient-hero:linear-gradient(135deg,#1e3a8a 0%,#5b21b6 50%,#1e40af 100%);--body-pattern:radial-gradient(circle at 1px 1px,rgba(255,255,255,0.03) 1px,transparent 0);--footer-bg:#020617;--footer-text:#64748b;--footer-border:#1e293b;--scrollbar-track:#1e293b;--scrollbar-thumb:#334155;--scrollbar-thumb-hover:#475569}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--text);background-color:var(--bg);background-image:var(--body-pattern);background-size:var(--body-pattern-size);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}a{color:var(--primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{text-decoration:underline}img{max-width:100%;display:block}button,input,textarea,select{font:inherit;color:inherit}h1,h2,h3,h4{color:var(--dark);line-height:1.3}h1{letter-spacing:-0.025em}h2{letter-spacing:-0.02em}.skip-to-content{position:absolute;top:-100%;left:50%;transform:translateX(-50%);background:var(--primary);color:var(--white);padding:0.75rem 1.5rem;border-radius:0 0 var(--radius) var(--radius);font-weight:600;font-size:0.875rem;z-index:9999;transition:top var(--transition-fast)}.skip-to-content:focus{top:0;text-decoration:none;outline:none}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}button:focus:not(:focus-visible),a:focus:not(:focus-visible),input:focus:not(:focus-visible),textarea:focus:not(:focus-visible),select:focus:not(:focus-visible){outline:none}@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:0.01ms !important;animation-iteration-count:1 !important;transition-duration:0.01ms !important;scroll-behavior:auto !important}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--scrollbar-track)}::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--scrollbar-thumb-hover)}*{scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb) var(--scrollbar-track)}::selection{background:var(--primary);color:#fff}::-moz-selection{background:var(--primary);color:#fff}@keyframes fadeInUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes strengthFill{from{width:0}}@keyframes shimmer{0%{background-position:-200% 0}100%{background-position:200% 0}}@keyframes toastIn{from{opacity:0;transform:translateY(16px) scale(0.96)}to{opacity:1;transform:translateY(0) scale(1)}}@keyframes toastOut{from{opacity:1;transform:translateY(0) scale(1)}to{opacity:0;transform:translateY(-8px) scale(0.96)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulseGlow{0%,100%{box-shadow:0 0 0 3px var(--primary-glow)}50%{box-shadow:0 0 0 5px var(--primary-glow)}}.main-content{animation:fadeInUp 0.4s ease both}.site-header{background:var(--white);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:background var(--transition-base),border-color var(--transition-base),box-shadow var(--transition-base)}[data-theme="dark"] .site-header{background:rgba(30,41,59,0.92)}.header-inner{max-width:var(--max-w);margin:0 auto;padding:0.75rem 1rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}.logo{font-size:1.25rem;font-weight:700;color:var(--dark);display:flex;align-items:center;gap:0.5rem;white-space:nowrap;transition:color var(--transition-fast)}.logo svg{width:28px;height:28px;flex-shrink:0}.logo:hover{text-decoration:none;color:var(--primary)}.header-right{display:flex;align-items:center;gap:0.75rem}.nav-links{display:flex;gap:0.25rem}.nav-links a{padding:0.4rem 0.75rem;border-radius:var(--radius);color:var(--text);font-size:0.875rem;font-weight:500;transition:background var(--transition-fast),color var(--transition-fast),transform var(--transition-fast)}.nav-links a:hover,.nav-links a.active{background:var(--primary);color:#fff;text-decoration:none}.nav-links a:active{transform:scale(0.97)}.lang-switcher{display:flex;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:border-color var(--transition-fast)}.lang-switcher button{background:var(--white);border:none;padding:0.35rem 0.6rem;cursor:pointer;font-size:0.75rem;font-weight:600;color:var(--text-light);transition:background var(--transition-base),color var(--transition-base)}.lang-switcher button:not(:last-child){border-right:1px solid var(--border)}.lang-switcher button.active,.lang-switcher button:hover{background:var(--primary);color:#fff}.lang-switcher button:active{transform:scale(0.95)}.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:0.25rem;border-radius:var(--radius);transition:background var(--transition-fast)}.menu-toggle:hover{background:var(--primary-subtle)}.menu-toggle svg{width:24px;height:24px;color:var(--dark);transition:color var(--transition-fast)}.hero{background:var(--gradient-hero);background-size:200% 200%;color:#fff;padding:3.5rem 1rem;text-align:center;position:relative;overflow:hidden}.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 30% 50%,rgba(255,255,255,0.08) 0%,transparent 70%);pointer-events:none}.hero h1{font-size:2rem;margin-bottom:0.75rem;color:#fff;position:relative}.hero p{font-size:1.1rem;opacity:0.9;max-width:600px;margin:0 auto;position:relative}.tools-section{max-width:var(--max-w);margin:0 auto;padding:2.5rem 1rem}.tools-section h2{font-size:1.5rem;margin-bottom:1.75rem;text-align:center}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:1.25rem}.tool-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;transition:box-shadow var(--transition-base),transform var(--transition-base),border-color var(--transition-base);display:flex;flex-direction:column;position:relative}.tool-card::before{content:"";position:absolute;inset:-1px;border-radius:calc(var(--radius-lg)+1px);padding:1px;background:linear-gradient(135deg,transparent 0%,transparent 100%);-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none;opacity:0;transition:opacity var(--transition-base)}.tool-card:hover{box-shadow:var(--shadow-card-hover);transform:translateY(-4px);border-color:var(--border-hover)}.tool-card:hover::before{background:var(--gradient-primary);opacity:1}.tool-card a{text-decoration:none;color:inherit;display:flex;flex-direction:column;height:100%}.tool-icon{width:48px;height:48px;border-radius:var(--radius);background:var(--gradient-icon);color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:1rem;font-size:1.25rem;flex-shrink:0;transition:transform var(--transition-base),box-shadow var(--transition-base)}.tool-card:hover .tool-icon{transform:scale(1.08);box-shadow:0 4px 12px rgba(37,99,235,0.25)}.tool-card h3{font-size:1.05rem;margin-bottom:0.4rem;transition:color var(--transition-fast)}.tool-card:hover h3{color:var(--primary)}.tool-card p{font-size:0.875rem;color:var(--text-light);flex:1}.breadcrumbs{max-width:var(--max-w);margin:0 auto;padding:0.75rem 1rem;font-size:0.85rem;display:flex;align-items:center;flex-wrap:wrap;gap:0.1rem}.breadcrumbs a{color:var(--text-light);transition:color var(--transition-fast);padding:0.15rem 0}.breadcrumbs a:hover{color:var(--primary);text-decoration:none}.breadcrumbs span{color:var(--text-muted);margin:0 0.25rem;font-size:0.7rem;user-select:none}.breadcrumbs span.separator::before{content:"\203A";font-size:1rem;line-height:1;vertical-align:middle}.breadcrumbs .current{color:var(--dark);font-weight:500}.tool-page{max-width:var(--max-w);margin:0 auto;padding:0 1rem 2rem;display:grid;grid-template-columns:1fr 300px;gap:1.5rem;align-items:start}.tool-main{min-width:0;animation:fadeInUp 0.35s ease both}.tool-sidebar{display:flex;flex-direction:column;gap:1.25rem;animation:fadeInUp 0.45s ease both}.tool-header{margin-bottom:1.5rem;display:flex;align-items:flex-start;gap:1rem}.tool-header-icon{width:48px;height:48px;min-width:48px;border-radius:var(--radius);background:var(--gradient-icon);display:flex;align-items:center;justify-content:center;color:#fff;margin-top:0.15rem}.tool-header-icon svg{width:28px;height:28px}.tool-header-text h1{font-size:1.75rem;margin-bottom:0.5rem}.tool-header-text p{color:var(--text-light);font-size:0.95rem}.nav-links a{display:inline-flex;align-items:center;gap:0.35rem}.nav-links a svg.nav-icon{width:15px;height:15px;flex-shrink:0}.tool-box{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.25rem;margin-bottom:1.25rem;transition:background var(--transition-base),border-color var(--transition-base),box-shadow var(--transition-base)}.tool-box h2{font-size:1.1rem;margin-bottom:0.75rem}.tool-box label{display:block;font-size:0.875rem;font-weight:500;margin-bottom:0.35rem;color:var(--dark);transition:color var(--transition-fast)}textarea,.text-input{width:100%;border:1px solid var(--border);border-radius:var(--radius);padding:0.65rem 0.75rem;font-size:0.9rem;resize:vertical;background:var(--white);transition:border-color var(--transition-fast),box-shadow var(--transition-fast),background var(--transition-fast)}textarea:focus,.text-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-glow)}textarea:hover:not(:focus),.text-input:hover:not(:focus){border-color:var(--border-hover)}textarea{min-height:120px;font-family:inherit}.text-input{height:auto}.btn{display:inline-flex;align-items:center;gap:0.4rem;padding:0.55rem 1rem;border:none;border-radius:var(--radius);font-size:0.875rem;font-weight:600;cursor:pointer;transition:all var(--transition-fast);white-space:nowrap;position:relative;user-select:none}.btn:active{transform:scale(0.96)}.btn:disabled{opacity:0.55;cursor:not-allowed;transform:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark);box-shadow:0 2px 8px rgba(37,99,235,0.3)}.btn-secondary{background:var(--white);color:var(--text);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg);border-color:var(--border-hover)}.btn-success{background:var(--success);color:#fff}.btn-success:hover:not(:disabled){box-shadow:0 2px 8px rgba(22,163,74,0.3)}.btn-danger{background:var(--error);color:#fff}.btn-danger:hover:not(:disabled){box-shadow:0 2px 8px rgba(220,38,38,0.3)}.btn-group{display:flex;flex-wrap:wrap;gap:0.5rem;margin:0.75rem 0}.output-area{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius);padding:0.75rem;min-height:80px;font-size:0.9rem;white-space:pre-wrap;word-break:break-word;position:relative;transition:background var(--transition-base),border-color var(--transition-base)}.output-area:empty::before{content:attr(data-placeholder);color:var(--text-muted)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:0.75rem}.stat-card{background:var(--bg);border-radius:var(--radius);padding:0.75rem;text-align:center;border:1px solid transparent;transition:border-color var(--transition-fast),background var(--transition-fast)}.stat-card:hover{border-color:var(--border)}.stat-card .stat-value{font-size:1.5rem;font-weight:700;color:var(--primary)}.stat-card .stat-label{font-size:0.75rem;color:var(--text-light);margin-top:0.15rem}.copy-btn{position:absolute;top:0.5rem;right:0.5rem;padding:0.3rem 0.6rem;font-size:0.75rem}.slider-row{display:flex;align-items:center;gap:0.75rem;margin:0.5rem 0}.slider-row input[type=range]{flex:1;accent-color:var(--primary);height:6px}.slider-row .range-val{min-width:2.5rem;text-align:center;font-weight:600;font-size:0.9rem}.checkbox-row{display:flex;align-items:center;gap:0.5rem;margin:0.35rem 0;font-size:0.875rem}.checkbox-row input[type=checkbox]{width:18px;height:18px;accent-color:var(--primary);cursor:pointer}.color-preview{width:100%;height:60px;border-radius:var(--radius);border:1px solid var(--border);margin:0.75rem 0;transition:border-color var(--transition-fast)}.color-inputs{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0.75rem}.color-inputs label{font-size:0.8rem}.color-inputs input{width:100%}select.text-input{appearance:auto}.qr-output{display:flex;justify-content:center;padding:1rem}.qr-output canvas,.qr-output img{max-width:100%}.info-section{margin-top:1.5rem}.info-section h2{font-size:1.2rem;margin-bottom:0.5rem}.info-section p,.info-section ul{font-size:0.9rem;color:var(--text);margin-bottom:0.75rem}.info-section ul{padding-left:1.25rem}.info-section li{margin-bottom:0.25rem}.strength-bar{height:6px;background:var(--border);border-radius:3px;overflow:hidden;margin:0.5rem 0}.strength-bar-fill{height:100%;border-radius:3px;transition:width 0.4s ease,background-color 0.3s ease;animation:strengthFill 0.5s ease}.strength-bar-fill.weak{background:var(--error)}.strength-bar-fill.fair{background:var(--warning)}.strength-bar-fill.good{background:#22c55e}.strength-bar-fill.strong{background:var(--success)}.toast-container{position:fixed;bottom:1.5rem;right:1.5rem;z-index:10000;display:flex;flex-direction:column-reverse;gap:0.5rem;pointer-events:none}.toast{pointer-events:auto;background:var(--dark);color:#f8fafc;padding:0.75rem 1.25rem;border-radius:var(--radius);font-size:0.875rem;font-weight:500;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:0.5rem;max-width:360px;animation:toastIn 0.25s ease both}.toast.toast-out{animation:toastOut 0.2s ease both}.toast-success{border-left:3px solid var(--success)}.toast-error{border-left:3px solid var(--error)}.toast-warning{border-left:3px solid var(--warning)}.toast-info{border-left:3px solid var(--primary)}[data-theme="dark"] .toast{background:#334155;color:#f1f5f9}.skeleton{background:linear-gradient( 90deg,var(--border) 25%,var(--bg-secondary) 50%,var(--border) 75% );background-size:400% 100%;animation:shimmer 1.5s ease infinite;border-radius:var(--radius)}.skeleton-text{height:1rem;margin-bottom:0.5rem;border-radius:4px}.skeleton-text:last-child{width:60%}.skeleton-heading{height:1.5rem;width:50%;margin-bottom:0.75rem;border-radius:4px}.skeleton-box{height:120px;margin-bottom:1rem}.skeleton-card{height:180px}.skeleton-icon{width:48px;height:48px;border-radius:var(--radius);margin-bottom:1rem}.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin 0.6s linear infinite;display:inline-block}.site-footer{background:var(--footer-bg);color:var(--footer-text);padding:2.5rem 1rem 1.5rem;margin-top:auto;font-size:0.85rem}.footer-inner{max-width:var(--max-w);margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:1.5rem}.footer-col h4{color:#f1f5f9;font-size:0.9rem;margin-bottom:0.5rem}.footer-col a{color:var(--footer-text);display:block;margin-bottom:0.25rem;font-size:0.8rem;transition:color var(--transition-fast)}.footer-col a:hover{color:#f1f5f9;text-decoration:none}.footer-bottom{max-width:var(--max-w);margin:1.25rem auto 0;padding-top:1.25rem;border-top:1px solid var(--footer-border);text-align:center;font-size:0.8rem}@media (max-width:768px){.tool-page{grid-template-columns:1fr}.tool-sidebar{order:10}.nav-links{display:none;position:absolute;top:100%;left:0;right:0;background:var(--white);flex-direction:column;padding:0.5rem;border-bottom:1px solid var(--border);box-shadow:var(--shadow-md);animation:fadeIn 0.15s ease}.nav-links.open{display:flex}.menu-toggle{display:block}.hero h1{font-size:1.5rem}.hero{padding:2.5rem 1rem}.color-inputs{grid-template-columns:1fr}.stats-grid{grid-template-columns:repeat(2,1fr)}.header-inner{flex-wrap:wrap}.toast-container{left:1rem;right:1rem;bottom:1rem}.toast{max-width:100%}}@media (max-width:480px){.tools-grid{grid-template-columns:1fr}.stats-grid{grid-template-columns:1fr 1fr}.btn-group{flex-direction:column}.btn-group .btn{width:100%;justify-content:center}.hero h1{font-size:1.3rem}.hero p{font-size:0.95rem}}@media print{*,*::before,*::after{background:transparent !important;color:#000 !important;box-shadow:none !important;text-shadow:none !important}body{font-size:12pt;line-height:1.5;background-image:none !important}a,a:visited{text-decoration:underline;color:#000 !important}a[href]::after{content:" (" attr(href) ")";font-size:0.8em;font-weight:normal}a[href^="#"]::after,a[href^="javascript:"]::after{content:""}.site-header,.site-footer,.menu-toggle,.lang-switcher,.toast-container,.copy-btn,.skip-to-content{display:none !important}.tool-page{display:block !important}.tool-sidebar{display:none !important}.hero{padding:1rem 0;border-bottom:2px solid #000}.tool-box,.output-area{border:1px solid #ccc;page-break-inside:avoid}img{max-width:100% !important;page-break-inside:avoid}h1,h2,h3,h4{page-break-after:avoid}}.lang-details{position:relative}.lang-details summary{list-style:none;cursor:pointer}.lang-details summary::-webkit-details-marker{display:none}.lang-switcher-btn{display:inline-flex;align-items:center;gap:.35rem;background:var(--white);border:1px solid var(--border);border-radius:8px;padding:.4rem .7rem;font-size:.8rem;font-weight:500;color:inherit;cursor:pointer;white-space:nowrap}.lang-switcher-btn:hover{background:var(--bg-secondary)}.lang-dropdown{position:absolute;top:calc(100%+4px);right:0;background:var(--white);border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,0.3);z-index:1000;max-height:320px;overflow-y:auto;min-width:180px;padding:.25rem 0;display:none}.lang-details[open] .lang-dropdown{display:block}.lang-option{display:block;padding:.45rem .75rem;font-size:.8rem;color:var(--text);text-decoration:none;white-space:nowrap}.lang-option:hover{background:var(--primary-subtle);color:var(--primary)}.lang-option.active{background:var(--primary-subtle);color:var(--primary);font-weight:600}