:root{--bg:#0b0f19;--card-bg:#121827;--card-border:#1f293d;--text-main:#f1f5f9;--text-muted:#94a3b8;--primary:#3b82f6;--primary-hover:#2563eb;--accent:#6366f1;--success:#10b981;--warning:#f59e0b;--danger:#ef4444;--nav-bg:rgba(11,15,25,0.92);--input-bg:#0e1320;--code-bg:#080b12;--font-sans:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;--font-heading:'Outfit',sans-serif}
[data-theme="light"]{--bg:#f8fafc;--card-bg:#ffffff;--card-border:#e2e8f0;--text-main:#0f172a;--text-muted:#64748b;--primary:#2563eb;--primary-hover:#1d4ed8;--accent:#4f46e5;--success:#059669;--warning:#d97706;--danger:#dc2626;--nav-bg:rgba(255,255,255,0.95);--input-bg:#f1f5f9;--code-bg:#f8fafc}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);background-color:var(--bg);color:var(--text-main);line-height:1.6;overflow-x:hidden;min-height:100vh;display:flex;flex-direction:column}
a{color:var(--primary);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--primary-hover)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 1.25rem}
.site-header{position:sticky;top:0;z-index:1000;background:var(--nav-bg);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--card-border);transition:background .3s}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:.6rem;font-family:var(--font-heading);font-weight:700;font-size:1.35rem;color:var(--text-main);text-decoration:none}
.brand svg{color:var(--primary)}
.nav-menu{display:flex;align-items:center;gap:1.5rem;list-style:none}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:.35rem;padding:.5rem .75rem;font-weight:500;color:var(--text-muted);border-radius:6px;transition:all .2s ease}
.nav-link:hover,.nav-link.active{color:var(--text-main);background:rgba(59,130,246,0.08)}
.nav-dropdown{position:relative}
.nav-dropdown-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);min-width:620px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:12px;box-shadow:0 20px 40px rgba(0,0,0,0.35);padding:1.25rem;display:none;grid-template-columns:repeat(2,1fr);gap:.6rem;z-index:1100}
.nav-dropdown:hover .nav-dropdown-menu,.nav-dropdown:focus-within .nav-dropdown-menu{display:grid}
.nav-dropdown-item{display:flex;align-items:center;gap:.5rem;padding:.45rem .6rem;border-radius:6px;color:var(--text-muted);font-size:.85rem;font-weight:500;transition:all .15s ease}
.nav-dropdown-item:hover{background:rgba(59,130,246,0.1);color:var(--primary)}
.nav-actions{display:flex;align-items:center;gap:.75rem}
.theme-toggle{background:transparent;border:1px solid var(--card-border);color:var(--text-main);width:40px;height:40px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease}
.theme-toggle:hover{border-color:var(--primary);color:var(--primary)}
.theme-toggle .icon-sun{display:none}
[data-theme="light"] .theme-toggle .icon-sun{display:block}
[data-theme="light"] .theme-toggle .icon-moon{display:none}
.mobile-toggle{display:none;background:transparent;border:1px solid var(--card-border);color:var(--text-main);width:40px;height:40px;border-radius:8px;cursor:pointer;align-items:center;justify-content:center}
.breadcrumb-wrap{padding:1rem 0;font-size:.85rem;color:var(--text-muted)}
.breadcrumbs{display:flex;align-items:center;flex-wrap:wrap;gap:.5rem;list-style:none}
.breadcrumbs li{display:flex;align-items:center;gap:.5rem}
.breadcrumbs li+li::before{content:"/";color:var(--text-muted);opacity:.6}
.breadcrumbs a{color:var(--text-muted)}
.breadcrumbs a:hover{color:var(--primary)}
.breadcrumbs span{color:var(--text-main);font-weight:600}
.hero{padding:2.5rem 0 3.5rem}
.hero-header{text-align:center;max-width:820px;margin:0 auto 2.5rem}
.badge-pill{display:inline-flex;align-items:center;gap:.5rem;padding:.3rem .9rem;background:rgba(59,130,246,0.12);border:1px solid rgba(59,130,246,0.3);color:var(--primary);font-size:.8rem;font-weight:600;border-radius:999px;margin-bottom:1rem;text-transform:uppercase;letter-spacing:.05em}
.badge-pill .pulse{width:8px;height:8px;border-radius:50%;background:var(--primary);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(59,130,246,0.7)}70%{box-shadow:0 0 0 8px rgba(59,130,246,0)}100%{box-shadow:0 0 0 0 rgba(59,130,246,0)}}
.hero h1{font-family:var(--font-heading);font-size:clamp(2rem,4vw,3.1rem);font-weight:800;line-height:1.15;letter-spacing:-.02em;margin-bottom:1rem;background:linear-gradient(135deg,var(--text-main) 30%,var(--primary) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.hero-desc{color:var(--text-muted);font-size:1.1rem;max-width:700px;margin:0 auto}
.tester-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:18px;box-shadow:0 25px 50px -12px rgba(0,0,0,0.35);overflow:hidden;margin-bottom:3rem}
.tester-tabs{display:flex;border-bottom:1px solid var(--card-border);background:rgba(0,0,0,0.12);overflow-x:auto;-webkit-overflow-scrolling:touch}
.tester-tab{flex:1;min-width:140px;padding:1.1rem 1rem;background:transparent;border:none;border-bottom:2px solid transparent;color:var(--text-muted);font-weight:600;font-size:.92rem;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:.5rem;transition:all .2s ease;white-space:nowrap}
.tester-tab:hover{color:var(--text-main);background:rgba(59,130,246,0.04)}
.tester-tab.active{color:var(--primary);border-bottom-color:var(--primary);background:rgba(59,130,246,0.08)}
.tester-panel{padding:2rem;display:none}
.tester-panel.active{display:block}
.field-group{margin-bottom:1.5rem}
.field-label{display:flex;justify-content:space-between;align-items:center;font-size:.9rem;font-weight:600;margin-bottom:.5rem;color:var(--text-main)}
.field-hint{font-size:.78rem;font-weight:400;color:var(--text-muted)}
.field-input,.field-textarea{width:100%;padding:.8rem 1rem;background:var(--input-bg);border:1px solid var(--card-border);border-radius:10px;color:var(--text-main);font-size:.95rem;transition:all .2s ease}
.field-input:focus,.field-textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(59,130,246,0.2)}
.field-error{font-size:.8rem;color:var(--danger);margin-top:.4rem;display:none}
.captcha-box-wrapper{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem 1rem;background:var(--input-bg);border:1px dashed var(--card-border);border-radius:12px;margin-bottom:1.75rem;min-height:140px}
.captcha-render-area{display:flex;justify-content:center;align-items:center;width:100%;max-width:304px;min-height:78px}
.entropy-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:.75rem;margin-bottom:1.5rem;padding:1rem;background:var(--input-bg);border-radius:10px;border:1px solid var(--card-border)}
.entropy-item{font-size:.8rem;display:flex;align-items:center;justify-content:space-between}
.entropy-item span:first-child{color:var(--text-muted)}
.entropy-item span:last-child{font-weight:600;color:var(--text-main)}
.btn-submit{display:inline-flex;align-items:center;justify-content:center;gap:.6rem;width:100%;padding:1rem 1.75rem;background:var(--primary);color:#fff;border:none;border-radius:12px;font-weight:700;font-size:1.05rem;cursor:pointer;transition:all .2s ease;box-shadow:0 4px 14px rgba(59,130,246,0.35)}
.btn-submit:hover:not(:disabled){background:var(--primary-hover);transform:translateY(-1px);box-shadow:0 6px 20px rgba(59,130,246,0.45)}
.btn-submit:disabled{opacity:.6;cursor:not-allowed;transform:none}
.btn-submit .spinner{display:none;width:20px;height:20px;border:2px solid rgba(255,255,255,0.3);border-radius:50%;border-top-color:#fff;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.btn-submit.is-loading .spinner{display:inline-block}
.btn-submit.is-loading .btn-text{opacity:.8}
.output-card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:18px;box-shadow:0 25px 50px -12px rgba(0,0,0,0.35);margin-bottom:3.5rem;overflow:hidden}
.output-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;padding:1.25rem 1.75rem;border-bottom:1px solid var(--card-border);background:rgba(0,0,0,0.08)}
.output-title{display:flex;align-items:center;gap:.6rem;font-family:var(--font-heading);font-weight:700;font-size:1.15rem}
.output-actions{display:flex;align-items:center;flex-wrap:wrap;gap:.5rem}
.btn-action{display:inline-flex;align-items:center;gap:.4rem;padding:.5rem .85rem;background:var(--input-bg);border:1px solid var(--card-border);border-radius:8px;color:var(--text-main);font-size:.85rem;font-weight:600;cursor:pointer;transition:all .15s ease}
.btn-action:hover{border-color:var(--primary);color:var(--primary)}
.dropdown-dl{position:relative}
.dropdown-dl-menu{position:absolute;top:100%;right:0;background:var(--card-bg);border:1px solid var(--card-border);border-radius:10px;box-shadow:0 12px 28px rgba(0,0,0,0.3);padding:.4rem;display:none;flex-direction:column;min-width:160px;z-index:50}
.dropdown-dl:focus-within .dropdown-dl-menu,.dropdown-dl.is-open .dropdown-dl-menu{display:flex}
.dropdown-dl-item{padding:.5rem .75rem;background:none;border:none;color:var(--text-main);font-size:.82rem;font-weight:500;text-align:left;border-radius:6px;cursor:pointer;transition:background .15s}
.dropdown-dl-item:hover{background:rgba(59,130,246,0.1);color:var(--primary)}
.output-body{padding:1.75rem}
.status-banner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;padding:1.25rem 1.5rem;border-radius:12px;margin-bottom:1.5rem;border:1px solid transparent}
.status-banner.success{background:rgba(16,185,129,0.12);border-color:rgba(16,185,129,0.3);color:var(--success)}
.status-banner.error{background:rgba(239,68,68,0.12);border-color:rgba(239,68,68,0.3);color:var(--danger)}
.status-banner.warning{background:rgba(245,158,11,0.12);border-color:rgba(245,158,11,0.3);color:var(--warning)}
.status-badge{font-size:.8rem;font-weight:800;padding:.3rem .75rem;border-radius:999px;text-transform:uppercase;letter-spacing:.05em}
.status-banner.success .status-badge{background:var(--success);color:#fff}
.status-banner.error .status-badge{background:var(--danger);color:#fff}
.status-banner.warning .status-badge{background:var(--warning);color:#fff}
.score-visual-card{display:flex;align-items:center;justify-content:center;flex-direction:column;padding:1.5rem;background:var(--input-bg);border:1px solid var(--card-border);border-radius:14px;margin-bottom:1.5rem}
.gauge-svg{width:160px;height:90px}
.gauge-bg{fill:none;stroke:var(--card-border);stroke-width:14}
.gauge-meter{fill:none;stroke:var(--primary);stroke-width:14;stroke-linecap:round;transition:stroke-dasharray .8s ease,stroke .3s}
.score-val{font-family:var(--font-heading);font-size:2rem;font-weight:800;margin-top:.5rem}
.score-label{font-size:.85rem;color:var(--text-muted)}
.metrics-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem;margin-bottom:1.5rem}
.metric-box{padding:1rem;background:var(--input-bg);border:1px solid var(--card-border);border-radius:10px}
.metric-box-title{font-size:.78rem;color:var(--text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.35rem}
.metric-box-val{font-size:1.15rem;font-weight:700;color:var(--text-main);word-break:break-all}
.json-container{background:var(--code-bg);border:1px solid var(--card-border);border-radius:12px;padding:1rem;overflow-x:auto;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:.85rem;line-height:1.5;max-height:360px}
.section-title-wrap{text-align:center;max-width:760px;margin:0 auto 2.5rem}
.section-tag{font-size:.8rem;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:.08em;margin-bottom:.5rem;display:inline-block}
.section-title{font-family:var(--font-heading);font-size:clamp(1.75rem,3vw,2.4rem);font-weight:800;line-height:1.2;margin-bottom:.75rem}
.section-subtitle{color:var(--text-muted);font-size:1.02rem}
.pretools-section{padding:3.5rem 0;border-top:1px solid var(--card-border);background:rgba(0,0,0,0.04)}
.pretools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:.85rem}
.pretool-card{display:flex;align-items:center;gap:.65rem;padding:.9rem 1rem;background:var(--card-bg);border:1px solid var(--card-border);border-radius:10px;color:var(--text-main);font-size:.88rem;font-weight:600;transition:all .2s ease}
.pretool-card svg{color:var(--primary);flex-shrink:0}
.pretool-card:hover{transform:translateY(-2px);border-color:var(--primary);box-shadow:0 6px 16px rgba(0,0,0,0.15);color:var(--primary)}
.features-section{padding:4.5rem 0}
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:1.5rem}
.feature-card{padding:2rem;background:var(--card-bg);border:1px solid var(--card-border);border-radius:16px;transition:all .25s ease}
.feature-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:0 14px 30px rgba(0,0,0,0.25)}
.feature-icon-wrap{width:48px;height:48px;border-radius:12px;background:rgba(59,130,246,0.12);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:1.25rem}
.feature-card h3{font-family:var(--font-heading);font-size:1.25rem;font-weight:700;margin-bottom:.6rem}
.feature-card p{color:var(--text-muted);font-size:.92rem;line-height:1.6}
.how-section{padding:4.5rem 0;border-top:1px solid var(--card-border);background:rgba(0,0,0,0.03)}
.how-steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.5rem}
.how-step{position:relative;padding:2rem;background:var(--card-bg);border:1px solid var(--card-border);border-radius:16px}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;font-weight:800;font-size:1rem;margin-bottom:1.25rem}
.how-step h3{font-family:var(--font-heading);font-size:1.15rem;font-weight:700;margin-bottom:.5rem}
.how-step p{color:var(--text-muted);font-size:.88rem}
.seo-section{padding:4.5rem 0;border-top:1px solid var(--card-border)}
.seo-article{background:var(--card-bg);border:1px solid var(--card-border);border-radius:18px;padding:2.5rem;box-shadow:0 10px 30px rgba(0,0,0,0.15)}
.seo-article h2{font-family:var(--font-heading);font-size:1.85rem;font-weight:800;margin-bottom:1.25rem}
.seo-article p{color:var(--text-muted);font-size:1.02rem;line-height:1.8;margin-bottom:1.25rem}
.seo-article p:last-child{margin-bottom:0}
.faq-section{padding:4.5rem 0;border-top:1px solid var(--card-border);background:rgba(0,0,0,0.02)}
.faq-list{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:1rem}
.faq-item{background:var(--card-bg);border:1px solid var(--card-border);border-radius:12px;overflow:hidden;transition:border-color .2s ease}
.faq-item.active{border-color:var(--primary)}
.faq-question{width:100%;padding:1.25rem 1.5rem;background:transparent;border:none;color:var(--text-main);font-weight:700;font-size:1.02rem;display:flex;align-items:center;justify-content:space-between;gap:1rem;cursor:pointer;text-align:left}
.faq-icon{transition:transform .2s ease}
.faq-item.active .faq-icon{transform:rotate(180deg)}
.faq-answer{padding:0 1.5rem 1.25rem;color:var(--text-muted);font-size:.95rem;line-height:1.7;display:none}
.faq-item.active .faq-answer{display:block}
.cta-section{padding:4.5rem 0}
.cta-banner{background:linear-gradient(135deg,rgba(59,130,246,0.18) 0%,rgba(99,102,241,0.25) 100%);border:1px solid rgba(59,130,246,0.3);border-radius:24px;padding:3.5rem 2rem;text-align:center;box-shadow:0 20px 40px rgba(0,0,0,0.25)}
.cta-banner h2{font-family:var(--font-heading);font-size:clamp(1.8rem,3.2vw,2.5rem);font-weight:800;margin-bottom:.85rem}
.cta-banner p{color:var(--text-muted);font-size:1.1rem;max-width:640px;margin:0 auto 2rem}
.cta-buttons{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:1rem}
.btn-cta{display:inline-flex;align-items:center;gap:.6rem;padding:.9rem 1.75rem;border-radius:12px;font-weight:700;font-size:1rem;transition:all .2s ease}
.btn-cta-primary{background:var(--primary);color:#fff;box-shadow:0 4px 16px rgba(59,130,246,0.4)}
.btn-cta-primary:hover{background:var(--primary-hover);transform:translateY(-2px);color:#fff}
.btn-cta-secondary{background:var(--card-bg);color:var(--text-main);border:1px solid var(--card-border)}
.btn-cta-secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.site-footer{background:var(--code-bg);border-top:1px solid var(--card-border);padding:4.5rem 0 2rem;font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:2.5rem;margin-bottom:3rem}
.footer-col h4{font-family:var(--font-heading);font-size:1rem;font-weight:700;margin-bottom:1.25rem;color:var(--text-main)}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:.65rem}
.footer-links a{color:var(--text-muted);font-size:.86rem;transition:all .15s}
.footer-links a:hover{color:var(--primary);padding-left:3px}
.footer-bottom{border-top:1px solid var(--card-border);padding-top:2rem;text-align:center;color:var(--text-muted);font-size:.82rem;line-height:1.7}
.footer-bottom p+p{margin-top:.5rem}
.cookie-banner{position:fixed;bottom:1.5rem;left:50%;transform:translateX(-50%);width:calc(100% - 2rem);max-width:640px;background:var(--card-bg);border:1px solid var(--card-border);border-radius:14px;padding:1.25rem 1.5rem;box-shadow:0 20px 40px rgba(0,0,0,0.4);z-index:9999;display:none;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem}
.cookie-banner.show{display:flex}
.cookie-text{flex:1;min-width:240px;font-size:.85rem;color:var(--text-muted)}
.cookie-text a{text-decoration:underline}
.cookie-actions{display:flex;gap:.6rem}
.btn-cookie{padding:.5rem 1rem;font-size:.82rem;font-weight:700;border-radius:8px;border:none;cursor:pointer}
.btn-cookie-accept{background:var(--primary);color:#fff}
.btn-cookie-dismiss{background:var(--input-bg);color:var(--text-muted);border:1px solid var(--card-border)}
.toast{position:fixed;bottom:2rem;right:2rem;padding:.75rem 1.25rem;background:var(--card-bg);border:1px solid var(--primary);border-radius:8px;color:var(--text-main);font-size:.85rem;font-weight:600;box-shadow:0 10px 25px rgba(0,0,0,0.3);z-index:10000;display:none;align-items:center;gap:.5rem}
.toast.show{display:flex;animation:fadeInUp .2s ease}
@keyframes fadeInUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:992px){.nav-dropdown-menu{min-width:320px;grid-template-columns:1fr;left:0;transform:none}.nav-menu{position:fixed;top:70px;left:0;right:0;background:var(--nav-bg);flex-direction:column;align-items:flex-start;padding:1.5rem;border-bottom:1px solid var(--card-border);display:none;gap:1rem}.nav-menu.is-active{display:flex}.mobile-toggle{display:flex}}
@media(max-width:640px){.hero{padding:1.5rem 0 2.5rem}.tester-panel{padding:1.25rem}.output-body{padding:1.25rem}.cta-banner{padding:2.5rem 1.25rem}.cookie-banner{bottom:.75rem;padding:1rem}}