:root{--primary:#2563eb;--primary-hover:#1d4ed8;--primary-light:#eff6ff;--primary-border:#bfdbfe;--success:#16a34a;--success-bg:#f0fdf4;--success-border:#bbf7d0;--warning:#d97706;--warning-bg:#fffbeb;--warning-border:#fde68a;--danger:#dc2626;--danger-bg:#fef2f2;--danger-border:#fecaca;--bg:#f8fafc;--surface:#ffffff;--surface-alt:#f1f5f9;--surface-border:#e2e8f0;--text:#0f172a;--text-muted:#64748b;--text-subtle:#94a3b8;--radius:12px;--shadow-sm:0 1px 2px 0 rgba(0,0,0,0.05);--shadow:0 4px 6px -1px rgba(0,0,0,0.1),0 2px 4px -2px rgba(0,0,0,0.1);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.1),0 4px 6px -4px rgba(0,0,0,0.1);--transition:all .2s ease-in-out}[data-theme="dark"]{--primary:#3b82f6;--primary-hover:#60a5fa;--primary-light:rgba(59,130,246,0.15);--primary-border:rgba(59,130,246,0.3);--success:#22c55e;--success-bg:rgba(34,197,94,0.12);--success-border:rgba(34,197,94,0.3);--warning:#f59e0b;--warning-bg:rgba(245,158,11,0.12);--warning-border:rgba(245,158,11,0.3);--danger:#ef4444;--danger-bg:rgba(239,68,68,0.12);--danger-border:rgba(239,68,68,0.3);--bg:#0b0f19;--surface:#111827;--surface-alt:#1f2937;--surface-border:#1f2937;--text:#f9fafb;--text-muted:#9ca3af;--text-subtle:#6b7280;--shadow-sm:0 1px 2px 0 rgba(0,0,0,0.4);--shadow:0 4px 6px -1px rgba(0,0,0,0.4);--shadow-lg:0 10px 15px -3px rgba(0,0,0,0.5)}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:'Inter',sans-serif;background-color:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;width:100%;min-height:100vh}h1,h2,h3,h4,h5,h6{font-family:'Outfit',sans-serif;color:var(--text);font-weight:700;line-height:1.25}a{color:var(--primary);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-hover)}button,input,textarea,select{font-family:inherit;font-size:inherit}button{cursor:pointer;border:none;background:none}.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}.header-nav{position:sticky;top:0;z-index:1000;background-color:var(--surface);border-bottom:1px solid var(--surface-border);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px}.brand-logo{display:flex;align-items:center;gap:10px;font-family:'Outfit',sans-serif;font-weight:800;font-size:1.35rem;color:var(--text)}.brand-logo svg{width:32px;height:32px;fill:none;stroke:var(--primary);stroke-width:2}.brand-accent{color:var(--primary)}.nav-menu{display:flex;align-items:center;gap:8px;list-style:none}.nav-item{position:relative}.nav-link{display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;font-weight:500;font-size:.95rem;color:var(--text-muted);transition:var(--transition)}.nav-link:hover,.nav-link.active{color:var(--primary);background-color:var(--primary-light)}.nav-dropdown{position:relative}.nav-dropdown-menu{display:none;position:absolute;top:100%;left:0;min-width:280px;background-color:var(--surface);border:1px solid var(--surface-border);border-radius:var(--radius);padding:10px;box-shadow:var(--shadow-lg);z-index:1100}.nav-dropdown-menu.mega-menu{min-width:680px;left:auto;right:0;display:none;grid-template-columns:repeat(2,1fr);gap:10px;max-height:480px;overflow-y:auto}.nav-dropdown:hover .nav-dropdown-menu,.nav-dropdown:focus-within .nav-dropdown-menu{display:block}.nav-dropdown:hover .nav-dropdown-menu.mega-menu,.nav-dropdown:focus-within .nav-dropdown-menu.mega-menu{display:grid}.dropdown-link{display:flex;align-items:center;gap:10px;padding:8px 12px;border-radius:8px;font-size:.875rem;color:var(--text);font-weight:500;transition:var(--transition)}.dropdown-link:hover{background-color:var(--primary-light);color:var(--primary)}.nav-actions{display:flex;align-items:center;gap:12px}.theme-toggle-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--surface-border);background-color:var(--surface-alt);color:var(--text);display:flex;align-items:center;justify-content:center;transition:var(--transition)}.theme-toggle-btn:hover{background-color:var(--primary-light);color:var(--primary)}.mobile-nav-toggle{display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--surface-border);background-color:var(--surface-alt);color:var(--text);align-items:center;justify-content:center}.breadcrumbs{padding:14px 0;background-color:var(--surface);border-bottom:1px solid var(--surface-border)}.breadcrumbs-list{display:flex;align-items:center;flex-wrap:wrap;gap:8px;list-style:none;font-size:.875rem;color:var(--text-muted)}.breadcrumb-sep{color:var(--text-subtle);font-size:.75rem}.breadcrumb-current{color:var(--text);font-weight:600}.hero-section{padding:50px 0 40px;background:linear-gradient(180deg,var(--surface) 0%,var(--bg) 100%)}.hero-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:20px;font-size:.8125rem;font-weight:600;background-color:var(--primary-light);color:var(--primary);border:1px solid var(--primary-border);margin-bottom:16px}.hero-title{font-size:2.5rem;font-weight:800;letter-spacing:-.025em;margin-bottom:14px;color:var(--text)}.hero-subtitle{font-size:1.125rem;color:var(--text-muted);max-width:720px;margin-bottom:30px}.checker-card{background-color:var(--surface);border:1px solid var(--surface-border);border-radius:16px;box-shadow:var(--shadow-lg);padding:28px}.checker-tabs{display:flex;gap:10px;border-bottom:1px solid var(--surface-border);padding-bottom:14px;margin-bottom:22px;overflow-x:auto}.tab-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:8px;font-weight:600;font-size:.9375rem;color:var(--text-muted);background:transparent;transition:var(--transition);white-space:nowrap}.tab-btn:hover{color:var(--primary);background-color:var(--primary-light)}.tab-btn.active{color:#fff;background-color:var(--primary)}.input-group{margin-bottom:20px}.input-label{display:block;font-size:.9rem;font-weight:600;margin-bottom:8px;color:var(--text)}.input-wrapper{position:relative;display:flex;align-items:center}.input-icon{position:absolute;left:16px;color:var(--text-subtle);pointer-events:none}.text-input{width:100%;height:54px;padding:0 48px;border:1.5px solid var(--surface-border);border-radius:10px;background-color:var(--bg);color:var(--text);font-size:1rem;transition:var(--transition)}.text-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.input-clear-icon{position:absolute;right:16px;color:var(--text-subtle);cursor:pointer;display:none}.textarea-input{width:100%;min-height:120px;padding:14px 16px;border:1.5px solid var(--surface-border);border-radius:10px;background-color:var(--bg);color:var(--text);font-size:.9375rem;line-height:1.5;resize:vertical;transition:var(--transition)}.textarea-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}.input-hint{display:flex;align-items:center;justify-content:space-between;font-size:.8125rem;color:var(--text-muted);margin-top:6px}.validation-feedback{display:flex;align-items:center;gap:6px;font-size:.8125rem;margin-top:6px;font-weight:500;display:none}.validation-feedback.error{color:var(--danger);display:flex}.validation-feedback.valid{color:var(--success);display:flex}.btn-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.btn-submit{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;border-radius:10px;background-color:var(--primary);color:#fff;font-weight:600;font-size:1rem;transition:var(--transition)}.btn-submit:hover:not(:disabled){background-color:var(--primary-hover);box-shadow:var(--shadow)}.btn-submit:disabled{opacity:.6;cursor:not-allowed}.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 22px;border-radius:10px;border:1.5px solid var(--surface-border);background-color:var(--surface);color:var(--text);font-weight:600;font-size:.95rem;transition:var(--transition)}.btn-secondary:hover{background-color:var(--surface-alt)}.spinner{width:18px;height:18px;border:2.5px solid rgba(255,255,255,.3);border-top-color:#fff;border-radius:50%;animation:spin .8s linear infinite;display:none}.btn-submit.loading .spinner{display:inline-block}.btn-submit.loading .btn-text{opacity:.8}@keyframes spin{to{transform:rotate(360deg)}}.results-section{padding:30px 0 50px;display:none}.results-card{background-color:var(--surface);border:1px solid var(--surface-border);border-radius:16px;box-shadow:var(--shadow);padding:28px;margin-bottom:24px}.results-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;border-bottom:1px solid var(--surface-border);padding-bottom:18px;margin-bottom:20px}.result-domain-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.result-domain-title{font-size:1.5rem;font-weight:700}.status-badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:20px;font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em}.status-valid{background-color:var(--success-bg);color:var(--success);border:1px solid var(--success-border)}.status-warning{background-color:var(--warning-bg);color:var(--warning);border:1px solid var(--warning-border)}.status-error{background-color:var(--danger-bg);color:var(--danger);border:1px solid var(--danger-border)}.result-actions{display:flex;align-items:center;gap:8px;position:relative}.action-btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:8px;border:1px solid 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12px;width:100%;border-radius:6px;font-size:.85rem;color:var(--text);font-weight:500}.download-item:hover{background-color:var(--primary-light);color:var(--primary)}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:24px}.stat-card{background-color:var(--surface-alt);border:1px solid var(--surface-border);border-radius:12px;padding:18px;display:flex;align-items:center;gap:14px}.stat-icon{width:46px;height:46px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.25rem}.stat-icon.primary{background-color:var(--primary-light);color:var(--primary)}.stat-icon.success{background-color:var(--success-bg);color:var(--success)}.stat-icon.warning{background-color:var(--warning-bg);color:var(--warning)}.stat-icon.danger{background-color:var(--danger-bg);color:var(--danger)}.stat-content{display:flex;flex-direction:column}.stat-label{font-size:.8125rem;color:var(--text-muted);font-weight:500}.stat-value{font-size:1.35rem;font-weight:700;color:var(--text);font-family:'Outfit',sans-serif}.raw-record-box{position:relative;background-color:var(--bg);border:1.5px solid var(--surface-border);border-radius:12px;padding:16px 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var(--primary-border);color:var(--primary)}.table-responsive{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;margin-bottom:20px}.custom-table{width:100%;border-collapse:collapse;font-size:.9rem;text-align:left}.custom-table th{background-color:var(--surface-alt);color:var(--text-muted);font-weight:600;padding:12px 16px;border-bottom:1.5px solid var(--surface-border);white-space:nowrap}.custom-table td{padding:12px 16px;border-bottom:1px solid var(--surface-border);color:var(--text);vertical-align:middle}.custom-table tr:last-child td{border-bottom:none}.qualifier-pill{display:inline-block;padding:3px 8px;border-radius:6px;font-weight:700;font-family:monospace;font-size:.85rem}.qualifier-pass{background-color:var(--success-bg);color:var(--success)}.qualifier-fail{background-color:var(--danger-bg);color:var(--danger)}.qualifier-softfail{background-color:var(--warning-bg);color:var(--warning)}.qualifier-neutral{background-color:var(--surface-alt);color:var(--text-muted)}.pre-feature-tools{padding:40px 0;background-color:var(--surface);border-top:1px solid var(--surface-border);border-bottom:1px solid var(--surface-border)}.pre-feature-tools h2{font-size:1.35rem;font-weight:700;margin-bottom:6px}.pre-feature-tools p{color:var(--text-muted);font-size:.9rem;margin-bottom:20px}.tools-grid-static{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px}.tool-tag-card{display:flex;align-items:center;gap:10px;padding:12px 14px;border-radius:10px;background-color:var(--bg);border:1px solid var(--surface-border);color:var(--text);font-size:.875rem;font-weight:500;transition:var(--transition)}.tool-tag-card:hover{background-color:var(--primary-light);color:var(--primary);border-color:var(--primary-border);transform:translateY(-2px)}.tool-tag-card svg{width:18px;height:18px;flex-shrink:0;color:var(--primary)}.features-section{padding:70px 0;background-color:var(--bg)}.section-header{text-align:center;max-width:760px;margin:0 auto 50px}.section-title{font-size:2.15rem;margin-bottom:12px}.section-desc{color:var(--text-muted);font-size:1.05rem}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:24px}.feature-card{background-color:var(--surface);border:1px solid var(--surface-border);border-radius:14px;padding:26px;box-shadow:var(--shadow-sm);transition:var(--transition)}.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}.feature-icon{width:50px;height:50px;border-radius:12px;background-color:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:18px}.feature-title{font-size:1.2rem;margin-bottom:10px}.feature-text{font-size:.925rem;color:var(--text-muted);line-height:1.6}.how-it-works-section{padding:70px 0;background-color:var(--surface);border-top:1px solid var(--surface-border)}.steps-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}.step-card{position:relative;background-color:var(--bg);border:1px solid var(--surface-border);border-radius:14px;padding:26px}.step-number{width:36px;height:36px;border-radius:50%;background-color:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-family:'Outfit',sans-serif;margin-bottom:16px}.step-title{font-size:1.15rem;margin-bottom:8px}.step-desc{font-size:.9rem;color:var(--text-muted)}.seo-article-section{padding:70px 0;background-color:var(--bg);border-top:1px solid var(--surface-border)}.article-wrapper{max-width:880px;margin:0 auto;background-color:var(--surface);border:1px solid var(--surface-border);border-radius:16px;padding:36px 40px;box-shadow:var(--shadow-sm)}.article-wrapper h2{font-size:1.75rem;margin-top:28px;margin-bottom:14px}.article-wrapper h2:first-child{margin-top:0}.article-wrapper h3{font-size:1.25rem;margin-top:20px;margin-bottom:10px}.article-wrapper p{font-size:.975rem;color:var(--text);line-height:1.75;margin-bottom:16px}.article-wrapper ul{margin-left:22px;margin-bottom:16px}.article-wrapper li{font-size:.95rem;margin-bottom:8px;line-height:1.6}.article-code{background-color:var(--bg);border:1px solid var(--surface-border);border-radius:8px;padding:12px 16px;font-family:monospace;font-size:.9rem;color:var(--text);margin-bottom:18px;overflow-x:auto}.faq-section{padding:70px 0;background-color:var(--surface);border-top:1px solid var(--surface-border)}.faq-accordion{max-width:840px;margin:0 auto;display:flex;flex-direction:column;gap:14px}.faq-item{background-color:var(--bg);border:1px solid var(--surface-border);border-radius:12px;overflow:hidden;transition:var(--transition)}.faq-question{width:100%;text-align:left;padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-weight:600;font-size:1.05rem;color:var(--text)}.faq-icon{transition:transform .2s ease-in-out;flex-shrink:0;color:var(--text-muted)}.faq-item.active .faq-icon{transform:rotate(180deg);color:var(--primary)}.faq-answer{padding:0 22px 20px;color:var(--text-muted);font-size:.95rem;line-height:1.65;display:none}.faq-item.active .faq-answer{display:block}.cta-section{padding:60px 0;background:linear-gradient(135deg,#1e3a8a 0%,#2563eb 100%);color:#fff;text-align:center}.cta-title{font-size:2.25rem;font-weight:800;margin-bottom:14px;color:#fff}.cta-desc{font-size:1.1rem;opacity:.9;max-width:650px;margin:0 auto 28px}.cta-btn-group{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap}.btn-cta-primary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:10px;background-color:#fff;color:#1e3a8a;font-weight:700;font-size:1rem;transition:var(--transition)}.btn-cta-primary:hover{background-color:#f1f5f9;transform:translateY(-2px)}.btn-cta-secondary{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:10px;border:2px solid rgba(255,255,255,.8);color:#fff;font-weight:700;font-size:1rem;transition:var(--transition)}.btn-cta-secondary:hover{background-color:rgba(255,255,255,.1);transform:translateY(-2px)}.site-footer{background-color:var(--surface);border-top:1px solid var(--surface-border);padding:60px 0 30px;color:var(--text-muted);font-size:.9rem}.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:40px}.footer-col-title{font-family:'Outfit',sans-serif;font-size:1.05rem;color:var(--text);font-weight:700;margin-bottom:16px}.footer-links-list{list-style:none;display:flex;flex-direction:column;gap:10px}.footer-links-list a{color:var(--text-muted);font-size:.875rem;transition:var(--transition)}.footer-links-list a:hover{color:var(--primary)}.footer-bottom{border-top:1px solid var(--surface-border);padding-top:24px;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:.825rem}.trademark-disclaimer{margin-top:12px;font-size:.78rem;color:var(--text-subtle);line-height:1.5}.cookie-banner{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);width:calc(100% - 40px);max-width:800px;background-color:var(--surface);border:1px solid var(--surface-border);border-radius:14px;padding:18px 24px;box-shadow:var(--shadow-lg);z-index:9999;display:none;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}.cookie-banner.show{display:flex}.cookie-text{flex:1;min-width:280px;font-size:.875rem;color:var(--text);line-height:1.5}.cookie-actions{display:flex;align-items:center;gap:10px}.btn-cookie-accept{padding:9px 20px;border-radius:8px;background-color:var(--primary);color:#fff;font-weight:600;font-size:.875rem}.btn-cookie-accept:hover{background-color:var(--primary-hover)}.btn-cookie-dismiss{padding:9px 18px;border-radius:8px;border:1px solid var(--surface-border);background-color:var(--surface-alt);color:var(--text);font-weight:600;font-size:.875rem}.btn-cookie-dismiss:hover{background-color:var(--bg)}@media(max-width:992px){.nav-menu{position:fixed;top:70px;left:0;right:0;bottom:0;background-color:var(--surface);flex-direction:column;align-items:flex-start;padding:20px;gap:12px;overflow-y:auto;display:none}.nav-menu.open{display:flex}.mobile-nav-toggle{display:flex}.nav-dropdown-menu,.nav-dropdown-menu.mega-menu{position:static;display:none;width:100%;min-width:100%;grid-template-columns:1fr;box-shadow:none;border:none;background-color:var(--surface-alt);margin-top:8px}.nav-dropdown.active .nav-dropdown-menu{display:block}.nav-dropdown.active .nav-dropdown-menu.mega-menu{display:grid}}@media(max-width:768px){.hero-title{font-size:1.85rem}.checker-card{padding:20px}.article-wrapper{padding:22px}.footer-bottom{flex-direction:column;align-items:flex-start}}