:root{--primary-color: #4f81ff;--secondary-color: #6366f1;--success-color: #10b981;--warning-color: #f59e0b;--danger-color: #ef4444;--info-color: #0ea5e9;--bg-dark: #0f172a;--bg-darker: #050812;--surface-1: #1e293b;--surface-2: #334155;--surface-3: #475569;--text-primary: #f8fafc;--text-secondary: #cbd5e1;--text-muted: #94a3b8;--border-color: rgba(100, 116, 139, .2);--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 8px 24px rgba(0, 0, 0, .35);--shadow-lg: 0 16px 40px rgba(0, 0, 0, .4);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--transition: all .3s cubic-bezier(.4, 0, .2, 1)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background:linear-gradient(135deg,var(--bg-darker) 0%,var(--bg-dark) 100%);color:var(--text-primary);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;font-size:16px;line-height:1.6;min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--text-primary)}h1{font-size:clamp(1.875rem,5vw,2.813rem)}h2{font-size:clamp(1.5rem,4vw,2.25rem)}h3{font-size:clamp(1.25rem,3vw,1.875rem)}h4{font-size:1.25rem}h5{font-size:1.1rem}h6{font-size:1rem}p{color:var(--text-secondary);margin-bottom:1rem}small{color:var(--text-muted);font-size:.875rem}a{color:var(--primary-color);text-decoration:none;transition:color .2s ease}a:hover{color:#60a5fa}button{font-family:inherit;cursor:pointer}input,textarea,select{font-family:inherit;font-size:inherit}.container{width:100%;padding:0 1.5rem;margin:0 auto}@media (min-width: 640px){.container{max-width:640px}}@media (min-width: 768px){.container{max-width:768px}}@media (min-width: 1024px){.container{max-width:1024px}}@media (min-width: 1280px){.container{max-width:1280px}}.mt-1{margin-top:.25rem}.mt-2{margin-top:.5rem}.mt-3{margin-top:1rem}.mt-4{margin-top:1.5rem}.mt-5{margin-top:2rem}.mb-1{margin-bottom:.25rem}.mb-2{margin-bottom:.5rem}.mb-3{margin-bottom:1rem}.mb-4{margin-bottom:1.5rem}.mb-5{margin-bottom:2rem}.p-1{padding:.25rem}.p-2{padding:.5rem}.p-3{padding:1rem}.p-4{padding:1.5rem}.p-5{padding:2rem}.flex{display:flex}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-2{gap:.5rem}.gap-3{gap:1rem}.gap-4{gap:1.5rem}.grid{display:grid}.hidden{display:none!important}.app-main{padding-top:80px;min-height:100vh}.app-container{max-width:1280px;margin:0 auto;padding:2rem 1.5rem 3rem}.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:#050812fa;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-md)}.navbar-content{max-width:1280px;margin:0 auto;padding:1.25rem 1.5rem;display:flex;justify-content:space-between;align-items:center}.navbar-brand{display:flex;align-items:center;gap:.75rem;text-decoration:none;color:var(--text-primary);font-size:1.25rem;font-weight:700;letter-spacing:.05em;transition:var(--transition)}.navbar-brand:hover{color:var(--primary-color)}.brand-icon{display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;background:linear-gradient(135deg,var(--primary-color),#3b82f6);border-radius:var(--radius-md);font-size:1rem;color:#fff}.brand-name{text-transform:uppercase;font-size:.95rem;letter-spacing:.08em}.navbar-menu-toggle{display:none;flex-direction:column;gap:.4rem;background:transparent;border:none;cursor:pointer;padding:.5rem}.navbar-menu-toggle span{display:block;width:24px;height:2px;background:var(--text-primary);border-radius:2px;transition:var(--transition)}.navbar-menu{display:flex;align-items:center;gap:2rem}.navbar-nav{display:flex;list-style:none;gap:.5rem;align-items:center}.nav-link{display:flex;align-items:center;gap:.5rem;padding:.75rem 1.25rem;color:var(--text-secondary);text-decoration:none;border-radius:var(--radius-md);font-weight:600;transition:var(--transition);border:1px solid transparent}.nav-link:hover{background:#4f81ff26;color:var(--text-primary);border-color:var(--primary-color)}.nav-link.active{background:linear-gradient(135deg,var(--primary-color),#3b82f6);color:#fff;border-color:transparent}.nav-theme-toggle{display:flex;align-items:center;gap:1rem}.theme-btn{display:flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:var(--radius-md);background:linear-gradient(135deg,var(--primary-color),#3b82f6);border:none;color:#fff;font-size:1.1rem;cursor:pointer;transition:var(--transition);box-shadow:var(--shadow-sm)}.theme-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.alert{display:flex;align-items:flex-start;gap:1rem;padding:1rem 1.5rem;border-radius:var(--radius-lg);margin-bottom:1.5rem;animation:slideIn .3s ease;position:fixed;z-index:100;border-left:4px solid;top:80px;right:20px;max-width:400px}@keyframes slideIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.alert-icon{font-size:1.25rem;flex-shrink:0}.alert-content{flex:1}.alert-content strong{display:block;color:var(--text-primary);margin-bottom:.25rem;text-transform:capitalize}.alert-content span{color:var(--text-secondary)}.alert-close{background:transparent;border:none;color:var(--text-muted);cursor:pointer;font-size:1.25rem;padding:0;transition:color .2s ease;align-self:flex-start}.alert-close:hover{color:var(--text-primary)}.alert-success{background:#10b9811a;border-left-color:var(--success-color);color:#86efac}.alert-warning{background:#f59e0b1a;border-left-color:var(--warning-color);color:#fcd34d}.alert-danger{background:#ef44441a;border-left-color:var(--danger-color);color:#fca5a5}.alert-info{background:#0ea5e91a;border-left-color:var(--info-color);color:#7dd3fc}.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.75rem 1.25rem;border-radius:var(--radius-md);border:none;font-weight:600;font-size:.95rem;cursor:pointer;transition:var(--transition);text-decoration:none;white-space:nowrap;position:relative;overflow:hidden}.btn:hover:not(:disabled){transform:translateY(-2px)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-primary{background:linear-gradient(135deg,var(--primary-color),#3b82f6);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover:not(:disabled){box-shadow:var(--shadow-md)}.btn-secondary{background:linear-gradient(135deg,var(--secondary-color),#4f46e5);color:#fff;box-shadow:var(--shadow-sm)}.btn-secondary:hover:not(:disabled){box-shadow:var(--shadow-md)}.btn-success{background:linear-gradient(135deg,var(--success-color),#059669);color:#fff;box-shadow:var(--shadow-sm)}.btn-warning{background:linear-gradient(135deg,var(--warning-color),#d97706);color:#111827;font-weight:700;box-shadow:var(--shadow-sm)}.btn-lg{padding:1rem 2rem;font-size:1rem}.text-input,.form-input{width:100%;padding:.875rem 1.125rem;background:#1e293bcc;border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-size:.95rem;transition:var(--transition);font-family:inherit;resize:none}.text-input:focus,.form-input:focus{outline:none;border-color:var(--primary-color);background:#1e293bf2;box-shadow:0 0 0 3px #4f81ff26}.text-input::placeholder,.form-input::placeholder{color:var(--text-muted)}.form-page{animation:fadeIn .4s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.form-card{background:var(--surface-1);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow-md)}.form-title{display:flex;align-items:center;gap:.75rem;font-size:1.875rem;margin-bottom:1.5rem;color:var(--text-primary)}.title-icon{font-size:1.875rem;display:inline-block}.operations-section,.preview-section{margin-bottom:2rem}.preview-title{font-size:1.1rem;font-weight:600;margin-bottom:1rem;color:var(--text-primary)}.preview-textarea{background-color:#ffffff0d;border:1px dashed var(--border-color);resize:none}.preview-textarea:focus{background-color:#ffffff14}.section-title{font-size:1.1rem;font-weight:600;margin-bottom:1rem;color:var(--text-primary)}.button-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:.75rem}.find-replace-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;align-items:flex-end}.find-replace-grid .btn{width:100%}.stats-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:1rem;margin-bottom:2rem}.stat-item{background:var(--surface-1);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:1.5rem;text-align:center;transition:var(--transition)}.stat-item:hover{transform:translateY(-4px);border-color:var(--primary-color);box-shadow:var(--shadow-md)}.stat-number{font-size:1.75rem;font-weight:700;color:var(--primary-color);margin-bottom:.5rem}.stat-name{font-size:.875rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;font-weight:600}.frequency-card{background:var(--surface-1);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow-md)}.frequency-title{font-size:1.25rem;font-weight:600;margin-bottom:1.5rem;display:flex;align-items:center;gap:.5rem}.frequency-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:1rem;margin-bottom:1.5rem}.frequency-item{background:#4f81ff1a;border:1px solid rgba(79,129,255,.2);border-radius:var(--radius-md);padding:1rem;display:flex;flex-direction:column;align-items:center;text-align:center;transition:var(--transition)}.frequency-item:hover{background:#4f81ff33;border-color:var(--primary-color)}.word{color:var(--text-primary);font-weight:600;word-break:break-word;margin-bottom:.5rem}.count{background:var(--primary-color);color:#fff;padding:.25rem .75rem;border-radius:999px;font-size:.85rem;font-weight:700}.about-page{animation:fadeIn .4s ease}.hero-card{background:var(--surface-1);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:3rem 2rem;text-align:center;margin-bottom:2rem;box-shadow:var(--shadow-md)}.hero-icon{font-size:3rem;margin-bottom:1rem;display:block}.hero-title{color:var(--text-primary);margin-bottom:1rem}.hero-subtitle{color:var(--text-secondary);font-size:1.1rem;margin-bottom:1.5rem;line-height:1.8}.badges-container{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.badge{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem 1rem;border-radius:999px;font-weight:600;font-size:.9rem;transition:var(--transition)}.badge-primary{background:#4f81ff33;color:#60a5fa;border:1px solid rgba(79,129,255,.3)}.badge-success{background:#10b98133;color:#6ee7b7;border:1px solid rgba(16,185,129,.3)}.badge-info{background:#0ea5e933;color:#7dd3fc;border:1px solid rgba(14,165,233,.3)}.badge-warning{background:#f59e0b33;color:#fcd34d;border:1px solid rgba(245,158,11,.3)}.badge-secondary{background:#6366f133;color:#a5b4fc;border:1px solid rgba(99,102,241,.3)}.badge-danger{background:#ef444433;color:#fca5a5;border:1px solid rgba(239,68,68,.3)}.badge:hover{filter:brightness(1.1);transform:translateY(-2px)}.features-container{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem;margin-bottom:2rem}.feature-item{background:var(--surface-1);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:2rem;transition:var(--transition);text-align:center}.feature-item:hover{transform:translateY(-6px);border-color:var(--primary-color);box-shadow:var(--shadow-lg)}.feature-icon{font-size:3rem;margin-bottom:1rem;display:block}.feature-heading{color:var(--text-primary);margin-bottom:.75rem;font-size:1.1rem}.feature-text{color:var(--text-secondary);font-size:.95rem;line-height:1.6}.how-it-works-card{background:var(--surface-1);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow-md)}.section-heading{color:var(--text-primary);font-size:1.5rem;margin-bottom:2rem;display:flex;align-items:center;gap:.75rem;justify-content:center}.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem}.step-item{text-align:center}.step-number{display:inline-flex;align-items:center;justify-content:center;width:50px;height:50px;border-radius:50%;background:linear-gradient(135deg,var(--primary-color),#3b82f6);color:#fff;font-size:1.75rem;font-weight:700;margin-bottom:1rem}.step-title{color:var(--text-primary);margin-bottom:.75rem;font-size:1.1rem}.step-desc{color:var(--text-secondary);line-height:1.6}.tech-card{background:var(--surface-1);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow-md)}.tech-badges{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.cta-card{background:linear-gradient(135deg,var(--primary-color),#3b82f6);border-radius:var(--radius-xl);padding:3rem 2rem;text-align:center;box-shadow:var(--shadow-lg)}.cta-title{color:#fff;font-size:1.75rem;margin-bottom:.75rem}.cta-subtitle{color:#ffffffe6;font-size:1.1rem;margin-bottom:1.5rem}@media (max-width: 768px){.app-main{padding-top:70px}.navbar-menu-toggle{display:flex}.navbar-menu{position:absolute;top:100%;left:0;right:0;background:#050812fa;border-top:1px solid var(--border-color);flex-direction:column;gap:1rem;padding:1.5rem;display:none}.navbar-menu.active{display:flex}.navbar-nav{flex-direction:column;width:100%}.nav-link{width:100%;justify-content:center}.form-card{padding:1.5rem}.button-grid{grid-template-columns:repeat(auto-fit,minmax(110px,1fr));gap:.5rem}.find-replace-grid{grid-template-columns:1fr}.stats-container{grid-template-columns:repeat(2,1fr)}.features-container,.steps-grid{grid-template-columns:1fr}.app-container{padding:0 1rem}.hero-card{padding:1.5rem 1rem}.btn{width:100%}}@media (max-width: 480px){.navbar-content{padding:1rem}.brand-name{display:none}.navbar-brand{gap:.5rem}.form-card{padding:1rem}.button-grid{grid-template-columns:repeat(2,1fr)}.stats-container{grid-template-columns:1fr}.frequency-grid{grid-template-columns:repeat(2,1fr)}.app-container{padding:0 1rem}h1{font-size:1.5rem}h2{font-size:1.25rem}h3{font-size:1rem}.form-title{font-size:1.25rem}.hero-card{padding:1rem}.cta-card{padding:1.5rem 1rem}.cta-title{font-size:1.25rem}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-dark)}::-webkit-scrollbar-thumb{background:var(--surface-2);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--surface-3)}@keyframes spin{to{transform:rotate(360deg)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}