:root{--bg:#090b10;--surface:#11141c;--surface-2:#171c26;--surface-3:#1e2431;--line:#222836;--line-strong:#2e3747;--text:#eef1f7;--muted:#9aa5bb;--faint:#8b95a7;--accent:#5b8cff;--accent-hi:#7da3ff;--accent-dim:#5b8cff1f;--pass:#3ecf8e;--warn:#f5a524;--fail:#f56565;--r-sm:8px;--r:12px;--r-lg:16px;--shadow:0 1px 2px #0000004d, 0 0 0 1px #ffffff05;--shadow-lg:0 8px 24px -8px #0009, 0 0 0 1px #ffffff08;--measure:68ch;--ease:cubic-bezier(.2, 0, .2, 1)}*{box-sizing:border-box}html,body{margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:5rem}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-variant-numeric:tabular-nums;font:16px/1.65 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;position:relative}body:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(90% 100% at 50% 0,#5b8cff14,#0000 70%);height:60vh;position:fixed;inset:0 0 auto}body>*{z-index:1;position:relative}::selection{color:#fff;background:#5b8cff4d}a{color:var(--accent);transition:color .15s var(--ease);text-decoration:none}a:hover{color:var(--accent-hi);text-underline-offset:2px;text-decoration:underline}.site-header{z-index:50;border-bottom:1px solid var(--line);background:var(--bg);justify-content:space-between;align-items:center;gap:1rem;padding:.9rem 1.5rem;display:flex;position:sticky;top:0}@supports ((-webkit-backdrop-filter:blur(1px)) or (backdrop-filter:blur(1px))){.site-header{-webkit-backdrop-filter:saturate(160%)blur(12px);background:#090b10b8}}.brand{color:var(--text);letter-spacing:-.02em;align-items:center;gap:.55rem;font-size:1.06rem;font-weight:650;display:inline-flex}.brand:hover{color:var(--text);text-decoration:none}.brand-mark{flex:none;display:block;overflow:visible}.brand-corner{fill:var(--accent-hi);transition:transform .25s var(--ease)}.brand-halo{fill:var(--pass);opacity:.18;transition:opacity .25s var(--ease)}.brand-dot{fill:var(--pass)}.brand:hover .brand-corner-tl{transform:translate(1px,1px)}.brand:hover .brand-corner-tr{transform:translate(-1px,1px)}.brand:hover .brand-corner-bl{transform:translate(1px,-1px)}.brand:hover .brand-corner-br{transform:translate(-1px,-1px)}.brand:hover .brand-halo{opacity:.32}.brand-ai{color:var(--accent-hi)}.site-header nav{gap:.35rem;display:flex}.site-header nav a{border-radius:var(--r-sm);color:var(--muted);transition:color .15s var(--ease), background-color .15s var(--ease);padding:.4rem .7rem;font-size:.94rem;font-weight:500}.site-header nav a:hover{color:var(--text);background:var(--surface-2);text-decoration:none}main{max-width:920px;margin:0 auto;padding:3.25rem 1.5rem 5rem}.site-footer{border-top:1px solid var(--line);color:var(--muted);background:var(--surface);margin-top:2rem;padding:2.5rem 1.5rem 3rem;font-size:.9rem}.site-footer p{max-width:920px;margin:0 auto}.byline{color:var(--faint);font-size:.85rem;margin-top:.75rem!important}.lang-switch{border-top:1px solid var(--line);flex-wrap:wrap;gap:.4rem;max-width:920px;margin:1.5rem auto 0;padding-top:1.5rem;display:flex}.lang-switch a,.lang-switch span{border:1px solid var(--line);transition:all .15s var(--ease);border-radius:99px;padding:.35rem .75rem;font-size:.85rem;font-weight:500}.lang-switch a{color:var(--muted)}.lang-switch a:hover{color:var(--text);border-color:var(--line-strong);background:var(--surface-2);text-decoration:none}.lang-switch span[aria-current]{color:var(--text);background:var(--accent-dim);border-color:#5b8cff59}h1{letter-spacing:-.03em;max-width:24ch;color:var(--text);margin:0 0 .85rem;font-size:clamp(2rem,4.5vw,2.75rem);font-weight:680;line-height:1.12}@supports ((-webkit-background-clip:text) or (background-clip:text)){@media not (forced-colors:active){h1{background:linear-gradient(#fff 30%,#c8d0e0);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}}}.lede{color:var(--muted);max-width:var(--measure);margin:0 0 2.25rem;font-size:1.08rem;line-height:1.6}.prose h2,.prose h3,.prose p,.prose li{max-width:var(--measure)}.prose h2{letter-spacing:-.015em;color:var(--text);margin:2.75rem 0 .8rem;font-size:1.35rem;font-weight:640}.prose h3{color:var(--text);margin:1.85rem 0 .45rem;font-size:1.05rem;font-weight:620}.prose p,.prose li,.prose ol{color:var(--muted)}.prose li{margin-bottom:.45rem}.prose ol li{margin-bottom:.55rem}.prose strong{color:var(--text);font-weight:620}.prose ul,.prose ol{padding-left:1.25rem}.tool-form{gap:.6rem;margin-bottom:.9rem;display:flex}.tool-form input{min-width:0;color:var(--text);background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r);transition:border-color .15s var(--ease), box-shadow .15s var(--ease);flex:1;padding:.9rem 1.1rem;font-family:inherit;font-size:1rem}.tool-form input::placeholder{color:var(--faint)}.tool-form input:hover{border-color:#3a4456}.tool-form input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim);outline:none}.tool-form button{color:#0a0f1e;background:linear-gradient(180deg, var(--accent-hi), var(--accent));border-radius:var(--r);cursor:pointer;transition:filter .15s var(--ease), transform .1s var(--ease);border:0;flex:none;padding:.9rem 1.5rem;font-family:inherit;font-size:1rem;font-weight:620}.tool-form button:hover:not(:disabled){filter:brightness(1.08)}.tool-form button:active:not(:disabled){transform:translateY(1px)}.tool-form button:disabled{opacity:.45;cursor:not-allowed;filter:saturate(.6)}.error{color:#ffc9c9;border-radius:var(--r);background:#f565651a;border:1px solid #f565654d;margin:0 0 1.5rem;padding:.85rem 1.1rem;font-size:.94rem}.loading{color:var(--muted);margin:1.5rem 0}.tool-panel{background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);margin:0 0 1.75rem;padding:1.1rem;position:relative}.tool-panel:before{content:"";pointer-events:none;background:linear-gradient(90deg,#0000,#7da3ff8c,#0000);height:1px;position:absolute;inset:-1px 12% auto}.tool-panel .tool-form{margin:0}.tool-panel .tool-form input{background:var(--bg)}.tool-hint{color:var(--faint);margin:.7rem .15rem 0;font-size:.84rem}.faq details{max-width:var(--measure);border-bottom:1px solid var(--line)}.faq h2+details{border-top:1px solid var(--line)}.faq summary{cursor:pointer;justify-content:space-between;align-items:center;gap:1rem;padding:1rem .15rem;list-style:none;display:flex}.faq summary::-webkit-details-marker{display:none}.prose .faq summary h3{transition:color .15s var(--ease);margin:0;font-size:1rem;font-weight:600}.faq summary:hover h3{color:var(--accent-hi)}.faq summary:after{content:"";background:linear-gradient(var(--faint), var(--faint)) center / 12px 1.5px no-repeat, linear-gradient(var(--faint), var(--faint)) center / 1.5px 12px no-repeat;width:12px;height:12px;transition:transform .2s var(--ease);flex:none}.faq details[open] summary:after{transform:rotate(45deg)}.faq details>p{margin:-.25rem 0 1.15rem;padding:0 .15rem}.faq summary:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-sm)}.score-card{background:linear-gradient(180deg, var(--surface-2), var(--surface));border:1px solid var(--line-strong);border-radius:var(--r-lg);box-shadow:var(--shadow-lg);align-items:center;gap:1.5rem;margin:2.25rem 0 1.5rem;padding:1.75rem;display:flex}.score-ring{--pct:100;letter-spacing:-.02em;background:radial-gradient(farthest-side, var(--surface) 78%, transparent 79%), conic-gradient(currentColor calc(var(--pct) * 1%), var(--surface-3) 0);border-radius:50%;flex:none;place-items:center;width:92px;height:92px;font-size:1.75rem;font-weight:700;display:grid;position:relative}.grade-a,.grade-b{color:var(--pass)}.grade-c,.grade-d{color:var(--warn)}.grade-f{color:var(--fail)}.score-card h2{letter-spacing:-.015em;color:var(--text);margin:0 0 .3rem;font-size:1.2rem;font-weight:640}.score-card p{color:var(--muted);word-break:break-all;margin:0;font-size:.9rem}.checks{gap:.7rem;margin:0 0 2.5rem;padding:0;list-style:none;display:grid}.check{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--line-strong);border-radius:var(--r);transition:background-color .15s var(--ease), border-color .15s var(--ease);padding:1.15rem 1.3rem}.check:hover{background:var(--surface-2)}.check[data-passed=true]{border-left-color:var(--pass)}.check[data-passed=false]{border-left-color:var(--fail)}.check-head{justify-content:space-between;align-items:baseline;gap:1rem;display:flex}.check-head h3{color:var(--text);margin:0;font-size:1rem;font-weight:620}.check-points{color:var(--faint);flex:none;font-size:.82rem;font-weight:500}.check-detail{color:var(--muted);max-width:var(--measure);margin:.45rem 0 0;font-size:.94rem}.check-fix{background:var(--surface-3);border-left:2px solid var(--warn);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--muted);max-width:var(--measure);margin:.8rem 0 0;padding:.7rem .95rem;font-size:.9rem}.check-fix strong{color:var(--warn);font-weight:620}.table-scroll{overscroll-behavior-x:contain;max-width:100%;margin:0 0 2.5rem;overflow-x:auto}.data-table,.crawlers{border-collapse:collapse;width:100%;margin:0;font-size:.92rem}.data-table caption,.crawlers caption{text-align:left;color:var(--text);padding-bottom:.8rem;font-size:1.05rem;font-weight:640}.data-table th,.data-table td,.crawlers th,.crawlers td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:.7rem .85rem}.data-table thead th,.crawlers thead th{color:var(--faint);text-transform:uppercase;letter-spacing:.05em;white-space:nowrap;border-bottom-color:var(--line-strong);font-size:.82rem;font-weight:560}.data-table tbody tr:last-child td,.crawlers tbody tr:last-child td{border-bottom:0}.data-table tbody tr,.crawlers tbody tr{transition:background-color .12s var(--ease)}.data-table tbody tr:hover,.crawlers tbody tr:hover{background:var(--surface)}.data-table code,.crawlers code{color:var(--text);word-break:break-all;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.88em}.data-table .muted,.muted{color:var(--faint)}.pill{white-space:nowrap;border-radius:99px;padding:.15rem .6rem;font-size:.78rem;font-weight:620;display:inline-block}.pill-ok{color:var(--pass);background:#3ecf8e1f;box-shadow:inset 0 0 0 1px #3ecf8e33}.pill-no{color:var(--fail);background:#f565651f;box-shadow:inset 0 0 0 1px #f5656533}.article-meta{color:var(--faint);margin:-.35rem 0 1.5rem;font-size:.85rem}.code-block{background:var(--surface);border:1px solid var(--line-strong);border-radius:var(--r-sm);box-shadow:var(--shadow);margin:1.35rem 0;padding:.95rem 1.1rem;font-size:.85rem;line-height:1.55;overflow-x:auto}.code-block code{color:#d8e0f0;white-space:pre;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.grid-heading{letter-spacing:-.015em;color:var(--text);margin:2.75rem 0 .4rem;font-size:1.35rem;font-weight:640}.grid-lede{color:var(--muted);max-width:var(--measure);margin:0}.grid-lede+.tool-grid{margin-top:1.1rem}.tool-grid{grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:.85rem;margin:2rem 0 0;padding:0;list-style:none;display:grid}.tool-grid a{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);height:100%;color:var(--text);transition:transform .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease), box-shadow .18s var(--ease);padding:1.25rem 1.35rem;display:block;position:relative}.tool-grid a:hover{background:var(--surface-2);border-color:var(--line-strong);box-shadow:var(--shadow-lg);text-decoration:none;transform:translateY(-2px)}.tool-grid strong{letter-spacing:-.01em;margin-bottom:.35rem;font-size:.98rem;font-weight:620;display:block}.tool-grid a:hover strong{color:var(--accent-hi)}.tool-grid span{color:var(--muted);font-size:.89rem;line-height:1.55;display:block}.breadcrumb{color:var(--faint);margin-bottom:1.35rem;font-size:.85rem}.breadcrumb a{color:var(--muted)}.breadcrumb a:hover{color:var(--accent-hi)}.breadcrumb span[aria-hidden]{color:var(--line-strong);padding:0 .4rem}.related{border-top:1px solid var(--line);margin-top:3.5rem;padding-top:2rem}.related h2{letter-spacing:-.015em;margin:0;font-size:1.2rem;font-weight:640}.related .tool-grid{margin-top:1.35rem}.serp-preview,.share-preview{margin:2.25rem 0 1.5rem}.serp-preview figcaption,.share-preview figcaption{color:var(--text);margin-bottom:.8rem;font-size:.95rem;font-weight:620}.serp-result{border-radius:var(--r);background:#fff;margin-bottom:.9rem;padding:1.15rem 1.3rem;font-family:arial,sans-serif;box-shadow:0 0 0 1px #ffffff14,0 4px 16px -4px #00000080}.serp-label{color:#70757a;text-transform:uppercase;letter-spacing:.05em;margin-bottom:.45rem;font-size:.72rem;display:block}.serp-url{color:#202124;word-break:break-all;margin-bottom:.15rem;font-size:.82rem;display:block}.serp-title{color:#1a0dab;margin-bottom:.2rem;font-size:1.25rem;line-height:1.3;display:block}.serp-title:hover{color:#1a0dab;text-decoration:underline}.serp-desc{color:#4d5156;margin:0;font-size:.88rem;line-height:1.58}.serp-mobile{max-width:380px}.share-card{background:var(--surface-2);border:1px solid var(--line-strong);border-radius:var(--r);max-width:500px;box-shadow:var(--shadow-lg);overflow:hidden}.share-card-image{aspect-ratio:1.91;object-fit:cover;background:var(--surface-3);width:100%;display:block}.share-card-empty{color:var(--faint);place-items:center;font-size:.9rem;display:grid}.share-card-small .share-card-image{aspect-ratio:1;float:left;width:120px}.share-card-body{padding:.9rem 1.1rem;overflow:hidden}.share-card-host{color:var(--faint);text-transform:lowercase;margin-bottom:.3rem;font-size:.76rem;display:block}.share-card-body strong{margin-bottom:.3rem;font-weight:620;display:block}.share-card-body span:last-child{color:var(--muted);font-size:.87rem}@media (max-width:640px){main{padding:2.25rem 1.1rem 3.5rem}.site-header{flex-wrap:wrap;row-gap:.5rem;padding:.8rem 1.1rem}.tool-form{flex-wrap:wrap}.tool-form button{width:100%}.score-card{gap:1.1rem;padding:1.35rem}.score-ring{width:76px;height:76px;font-size:1.45rem}.tool-grid{grid-template-columns:1fr}.site-footer{padding:2rem 1.1rem 2.5rem}}a:focus-visible,button:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-sm)}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}.tool-grid a:hover{transform:none}}@media (prefers-contrast:more){:root{--line:#3a4356;--line-strong:#4d5870;--muted:#c6cfe0;--faint:#a8b2c4}}