:root{--ink:#111318;--muted:#5d6470;--line:#dedfe3;--paper:#fff;--soft:#f5f6f8;--accent:#1d4ed8;--max:1160px;--reading:720px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration-thickness:1px;text-underline-offset:3px}
a:hover{color:var(--accent)}
a:focus-visible{outline:3px solid #93b4ff;outline-offset:4px;border-radius:2px}
.skip-link{position:fixed;z-index:20;left:18px;top:12px;transform:translateY(-180%);padding:9px 13px;background:var(--ink);color:#fff}
.skip-link:focus{transform:none}
.site-header{border-bottom:1px solid var(--line);background:#fff}
.header-inner{width:min(calc(100% - 40px),var(--max));height:70px;margin:auto;display:flex;align-items:center;justify-content:space-between}
.wordmark{font-size:15px;font-weight:850;letter-spacing:.11em;text-decoration:none}
.header-inner nav{display:flex;align-items:center;gap:26px}
.header-inner nav a{font-size:14px;color:#414751;text-decoration:none}
.header-inner nav a[aria-current="page"]{color:var(--ink);font-weight:700}
.measure{width:min(calc(100% - 40px),860px);margin:auto}
.guide-hero{padding:92px 0 88px;border-bottom:1px solid var(--line)}
.tool-index-hero{padding:84px 0 78px;border-bottom:1px solid var(--line)}
.eyebrow{margin:0 0 15px;color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.13em}
.guide-hero h1,.tool-index-hero h1{max-width:850px;margin:0;font-size:clamp(42px,6vw,76px);line-height:1.02;letter-spacing:-.055em;font-weight:760}
.hero-copy{max-width:700px;margin:28px 0 27px;color:var(--muted);font-size:19px;line-height:1.65}
.primary-link{display:inline-block;color:var(--accent);font-weight:750;text-decoration:none}
.tool-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.tool-strip a{display:inline-flex;align-items:center;min-height:36px;padding:7px 12px;border:1px solid var(--line);border-radius:6px;background:#fff;color:#313741;font-size:13px;font-weight:720;text-decoration:none}
.tool-strip a:hover{border-color:#aab7d8;color:var(--accent)}
.library{width:min(calc(100% - 40px),var(--max));margin:auto;padding:76px 0 92px}
.tool-directory{width:min(calc(100% - 40px),var(--max));margin:auto;padding:76px 0 92px}
.library-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:30px}
.library-head h2,.standards h2,.related h2{margin:0;font-size:34px;line-height:1.18;letter-spacing:-.035em}
.library-head>p{margin:0 0 3px;color:var(--muted);font-size:14px}
.article-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--ink)}
.article-card{min-height:320px;padding:32px 0 28px;border-bottom:1px solid var(--line)}
.article-card:nth-child(odd){padding-right:36px;border-right:1px solid var(--line)}
.article-card:nth-child(even){padding-left:36px}
.card-meta,.card-foot{display:flex;align-items:center;justify-content:space-between;gap:20px;color:var(--muted);font-size:12px}
.card-meta span:first-child{color:var(--accent);font-weight:750;text-transform:uppercase;letter-spacing:.07em}
.article-card h3{margin:26px 0 13px;font-size:27px;line-height:1.2;letter-spacing:-.03em}
.article-card h3 a{text-decoration:none}
.article-card>p{max-width:520px;margin:0;color:var(--muted)}
.card-foot{margin-top:36px}
.card-foot a{color:var(--ink);font-weight:700;text-decoration:none}
.standards{display:grid;grid-template-columns:minmax(260px,.75fr) minmax(300px,1fr);gap:80px;padding:72px max(20px,calc((100vw - var(--max))/2));background:var(--soft);border-block:1px solid var(--line)}
.standards>p{max-width:650px;margin:0;color:#424853;font-size:18px;line-height:1.75}
.breadcrumbs{width:min(calc(100% - 40px),var(--max));margin:28px auto 0;display:flex;gap:10px;color:var(--muted);font-size:12px}
.breadcrumbs a{text-decoration:none}
.article-shell{padding-bottom:100px}
.article-header{width:min(calc(100% - 40px),920px);margin:78px auto 64px;text-align:center}
.article-header h1{margin:0;font-size:clamp(40px,6vw,68px);line-height:1.06;letter-spacing:-.05em}
.dek{max-width:780px;margin:25px auto 26px;color:var(--muted);font:21px/1.6 Georgia,"Times New Roman",serif}
.byline{display:flex;justify-content:center;gap:22px;flex-wrap:wrap;color:var(--muted);font-size:12px}
.byline span+span{padding-left:22px;border-left:1px solid var(--line)}
.article-layout{width:min(calc(100% - 40px),1040px);margin:auto;display:grid;grid-template-columns:190px minmax(0,var(--reading));gap:64px;justify-content:center;align-items:start}
.article-aside{position:sticky;top:28px;font-size:13px}
.page-toc{padding-top:17px;border-top:2px solid var(--ink)}
.page-toc p,.policy-nav p,.aside-tool p{margin:0 0 10px;font-weight:780;color:var(--ink)}
.page-toc ol{margin:0;padding:0;list-style:none}
.page-toc li+li{margin-top:8px}
.page-toc a{display:block;color:var(--muted);line-height:1.35;text-decoration:none}
.page-toc a:hover{color:var(--accent)}
.aside-tool{margin-top:28px;padding-top:17px;border-top:1px solid var(--line)}
.aside-tool a{color:var(--accent);font-weight:750;text-decoration:none}
.aside-tool span{display:block;margin-top:12px;color:var(--muted);font-size:11px;line-height:1.55}
.article-body{font:19px/1.82 Georgia,"Times New Roman",serif;color:#24272d}
.article-body>p:first-child{font-size:22px;line-height:1.7;color:var(--ink)}
.article-body h2,.article-body h3,.article-body h4{font-family:Inter,ui-sans-serif,system-ui,sans-serif;color:var(--ink);letter-spacing:-.03em}
.article-body h2{margin:62px 0 18px;padding-top:8px;font-size:32px;line-height:1.2}
.article-body h3{margin:40px 0 12px;font-size:23px;line-height:1.3}
.article-body p{margin:0 0 24px}
.article-body ul,.article-body ol{margin:0 0 28px;padding-left:27px}
.article-body li{padding-left:5px;margin-bottom:11px}
.article-body blockquote{margin:34px 0;padding:4px 0 4px 24px;border-left:3px solid var(--accent);color:#3f4650;font-style:italic}
.article-body code{padding:.12em .35em;border:1px solid var(--line);border-radius:4px;background:var(--soft);font:85%/1.5 ui-monospace,SFMono-Regular,Menlo,monospace}
.article-body pre{overflow:auto;padding:18px;background:#14161a;color:#f5f5f5;border-radius:7px}
.article-body pre code{padding:0;border:0;background:none;color:inherit}
.article-body table{width:100%;margin:28px 0 34px;border-collapse:collapse;font:14px/1.5 Inter,ui-sans-serif,system-ui,sans-serif}
.article-body th,.article-body td{padding:13px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.article-body th{border-top:1px solid var(--ink);color:var(--ink)}
.article-body a{color:var(--accent)}
.article-body hr{margin:48px 0;border:0;border-top:1px solid var(--line)}
.article-tools{margin:62px 0 0;padding:28px;border:1px solid var(--line);border-radius:8px;background:#fafbfc;font-family:Inter,ui-sans-serif,system-ui,sans-serif}
.article-tools h2{margin:0 0 10px;padding:0;font-size:25px;line-height:1.22;letter-spacing:-.03em}
.article-tools p:not(.eyebrow){max-width:580px;margin:0;color:var(--muted);font-size:14px;line-height:1.65}
.tool-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:22px}
.tool-card{display:block;min-height:112px;padding:18px;border:1px solid var(--line);border-radius:7px;background:#fff;color:var(--ink);text-decoration:none}
.tool-card span{display:block;margin-bottom:8px;font-size:15px;font-weight:780;line-height:1.25}
.tool-card small{display:block;color:var(--muted);font-size:12px;line-height:1.5}
.tool-card:hover{border-color:#aab7d8;color:var(--accent)}
.related{padding:78px max(20px,calc((100vw - var(--max))/2)) 88px;background:var(--soft);border-top:1px solid var(--line)}
.related-head{margin-bottom:30px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-block:1px solid var(--line)}
.related-grid article{padding:28px 28px 28px 0}
.related-grid article+article{padding-left:28px;border-left:1px solid var(--line)}
.related-grid span{font-size:11px;color:var(--accent);font-weight:750;text-transform:uppercase;letter-spacing:.07em}
.related-grid h3{margin:12px 0 10px;font-size:20px;line-height:1.3}
.related-grid h3 a{text-decoration:none}
.related-grid p{margin:0;color:var(--muted);font-size:13px}
.text-link{display:inline-block;margin-top:25px;color:var(--accent);font-weight:750;text-decoration:none}
.tool-directory-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:1px solid var(--ink)}
.tool-directory-card{min-height:280px;padding:28px 22px 26px 0;border-bottom:1px solid var(--line)}
.tool-directory-card:not(:nth-child(4n)){border-right:1px solid var(--line)}
.tool-directory-card:not(:nth-child(4n+1)){padding-left:22px}
.tool-mark{display:inline-flex;align-items:center;justify-content:center;min-width:38px;height:30px;margin-bottom:28px;padding:0 8px;border:1px solid var(--line);border-radius:6px;color:var(--accent);font-size:12px;font-weight:850}
.tool-directory-card h3{margin:0 0 12px;font-size:23px;line-height:1.22;letter-spacing:-.03em}
.tool-directory-card h3 a,.tool-directory-card>a{text-decoration:none}
.tool-directory-card p{margin:0 0 24px;color:var(--muted);font-size:14px;line-height:1.65}
.tool-directory-card>a{color:var(--accent);font-size:13px;font-weight:760}
.tool-page{padding-bottom:96px}
.tool-hero{width:min(calc(100% - 40px),var(--max));margin:66px auto 76px;display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,470px);gap:76px;align-items:center}
.tool-hero h1{margin:0;font-size:clamp(42px,6vw,72px);line-height:1.04;letter-spacing:-.055em}
.tool-hero-copy>p:not(.eyebrow){max-width:700px;margin:24px 0 0;color:var(--muted);font:21px/1.62 Georgia,"Times New Roman",serif}
.tool-form{padding:28px;border:1px solid var(--line);border-radius:8px;background:var(--soft)}
.tool-form label{display:block;margin-bottom:10px;color:var(--ink);font-size:13px;font-weight:780}
.tool-form div{display:grid;grid-template-columns:1fr auto;gap:10px}
.tool-form input{min-width:0;height:48px;padding:0 14px;border:1px solid #cfd3da;border-radius:6px;background:#fff;color:var(--ink);font:15px/1.2 Inter,ui-sans-serif,system-ui,sans-serif}
.tool-form input:focus{outline:3px solid #93b4ff;outline-offset:2px}
.tool-form button{height:48px;padding:0 16px;border:0;border-radius:6px;background:var(--ink);color:#fff;font-weight:780;cursor:pointer}
.tool-form p{margin:15px 0 0;color:var(--muted);font-size:13px;line-height:1.55}
.tool-content-grid{width:min(calc(100% - 40px),var(--max));margin:auto;display:grid;grid-template-columns:1fr 1fr;gap:64px;padding-top:54px;border-top:1px solid var(--line)}
.tool-content-grid h2,.tool-notes h2,.tool-faq h2{margin:0 0 20px;font-size:31px;line-height:1.2;letter-spacing:-.035em}
.check-list,.number-list{margin:0;padding:0;list-style:none}
.check-list li,.number-list li{position:relative;padding:15px 0 15px 34px;border-bottom:1px solid var(--line);color:#333943}
.check-list li::before{content:"";position:absolute;left:0;top:22px;width:13px;height:8px;border-left:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(-45deg)}
.number-list{counter-reset:steps}
.number-list li{counter-increment:steps}
.number-list li::before{content:counter(steps);position:absolute;left:0;top:13px;display:flex;align-items:center;justify-content:center;width:22px;height:22px;border:1px solid var(--line);border-radius:50%;color:var(--muted);font-size:11px;font-weight:800}
.tool-notes{width:min(calc(100% - 40px),var(--max));margin:78px auto 0;display:grid;grid-template-columns:minmax(260px,.65fr) minmax(360px,1fr);gap:72px;padding:42px 0;border-block:1px solid var(--line)}
.tool-notes ul{margin:0;padding:0;list-style:none}
.tool-notes li{padding:0 0 18px;color:#333943;font:18px/1.7 Georgia,"Times New Roman",serif}
.tool-notes li+li{padding-top:18px;border-top:1px solid var(--line)}
.tool-faq{width:min(calc(100% - 40px),var(--max));margin:78px auto 0}
.tool-faq>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-block:1px solid var(--line)}
.tool-faq article{padding:26px 24px 26px 0}
.tool-faq article+article{padding-left:24px;border-left:1px solid var(--line)}
.tool-faq h3{margin:0 0 10px;font-size:19px;line-height:1.28;letter-spacing:-.02em}
.tool-faq p{margin:0;color:var(--muted);font-size:14px;line-height:1.65}
.tool-links{width:min(calc(100% - 40px),var(--max));margin:78px auto 0;display:grid;grid-template-columns:1fr 1fr;gap:64px}
.tool-links>div{padding-top:18px;border-top:1px solid var(--ink)}
.tool-links a{display:block;padding:14px 0;border-bottom:1px solid var(--line);color:var(--ink);font-weight:760;text-decoration:none}
.tool-links a:hover{color:var(--accent)}
.info-page{padding-bottom:100px}
.info-header{width:min(calc(100% - 40px),860px);margin:72px auto 55px;padding-bottom:48px;border-bottom:1px solid var(--line)}
.info-header h1{margin:0;font-size:clamp(42px,6vw,66px);line-height:1.06;letter-spacing:-.05em}
.info-header>p:not(.eyebrow){max-width:730px;margin:23px 0 18px;color:var(--muted);font:20px/1.65 Georgia,"Times New Roman",serif}
.info-header time{color:var(--muted);font-size:12px}
.info-layout{width:min(calc(100% - 40px),1040px);margin:auto;display:grid;grid-template-columns:190px minmax(0,var(--reading));gap:64px;justify-content:center;align-items:start}
.info-aside{position:sticky;top:28px;font-size:13px}
.policy-nav{display:grid;gap:6px;margin-top:28px;padding-top:17px;border-top:1px solid var(--line)}
.policy-nav a{color:var(--muted);text-decoration:none}
.policy-nav a:hover{color:var(--accent)}
.info-body{width:100%;font:18px/1.8 Georgia,"Times New Roman",serif;color:#24272d}
.info-body>p:first-child{font-size:21px;line-height:1.72;color:var(--ink)}
.info-body h2,.info-body h3{font-family:Inter,ui-sans-serif,system-ui,sans-serif;color:var(--ink);letter-spacing:-.03em}
.info-body h2{margin:58px 0 17px;font-size:30px;line-height:1.2}
.info-body h3{margin:36px 0 11px;font-size:22px}
.info-body p{margin:0 0 23px}
.info-body ul,.info-body ol{margin:0 0 28px;padding-left:27px}
.info-body li{padding-left:5px;margin-bottom:10px}
.info-body a{color:var(--accent)}
.info-body strong{color:var(--ink)}
.reading-path{display:grid;grid-template-columns:minmax(260px,.7fr) minmax(320px,1fr);gap:72px;width:min(calc(100% - 40px),var(--max));margin:auto;padding:78px 0 92px}
.reading-path h2{margin:0;font-size:34px;line-height:1.18;letter-spacing:-.035em}
.reading-path ol{counter-reset:path;margin:0;padding:0;list-style:none;border-top:1px solid var(--ink)}
.reading-path li{counter-increment:path;display:grid;grid-template-columns:40px 1fr;gap:16px;padding:22px 0;border-bottom:1px solid var(--line)}
.reading-path li::before{content:counter(path);display:flex;align-items:center;justify-content:center;width:30px;height:30px;border:1px solid var(--line);border-radius:50%;color:var(--muted);font-size:12px;font-weight:760}
.reading-path a{color:var(--ink);font-weight:780;text-decoration:none}
.reading-path a:hover{color:var(--accent)}
.reading-path span{grid-column:2;display:block;margin-top:4px;color:var(--muted);font-size:14px;line-height:1.55}
.not-found{width:min(calc(100% - 40px),760px);min-height:65vh;margin:auto;padding:110px 0}
.not-found h1{max-width:650px;margin:0;font-size:clamp(43px,7vw,72px);line-height:1.05;letter-spacing:-.055em}
.not-found>p:not(.eyebrow){margin:24px 0;color:var(--muted);font-size:18px}
.not-found div{display:flex;align-items:center;gap:28px}
.not-found .text-link{margin:0}
.site-footer{border-top:1px solid var(--line);background:#fff}
.footer-inner{width:min(calc(100% - 40px),var(--max));min-height:170px;margin:auto;display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:50px;color:var(--muted);font-size:12px}
.footer-inner strong{color:var(--ink);letter-spacing:.1em}
.footer-inner p{margin:3px 0 0}
.footer-inner nav{display:flex;gap:22px}
.footer-inner nav a{text-decoration:none}
@media(max-width:980px){.tool-directory-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-directory-card:not(:nth-child(4n)){border-right:0}.tool-directory-card:nth-child(odd){padding-right:22px;border-right:1px solid var(--line)}.tool-directory-card:nth-child(even){padding-left:22px}.tool-hero{grid-template-columns:1fr;gap:36px}.tool-faq>div{grid-template-columns:1fr}.tool-faq article,.tool-faq article+article{padding:24px 0;border-left:0;border-bottom:1px solid var(--line)}}
@media(max-width:760px){.header-inner{height:62px}.header-inner nav{gap:15px}.header-inner nav a{font-size:12px}.guide-hero,.tool-index-hero{padding:64px 0}.guide-hero h1,.tool-index-hero h1{font-size:44px}.hero-copy{font-size:17px}.library,.tool-directory{padding:56px 0 70px}.library-head{align-items:start;flex-direction:column;gap:8px}.article-grid{display:block}.article-card,.article-card:nth-child(odd),.article-card:nth-child(even){min-height:0;padding:28px 0;border-right:0}.article-card h3{font-size:24px}.standards,.reading-path,.tool-notes,.tool-links{grid-template-columns:1fr;gap:24px;padding-block:55px}.article-header{margin:55px auto 45px}.article-header h1{font-size:42px}.dek{font-size:19px}.byline{gap:9px 14px}.byline span+span{padding-left:14px}.article-layout,.info-layout{display:block}.article-aside,.info-aside{position:static;margin-bottom:45px;padding:16px;border:1px solid var(--line)}.page-toc{padding-top:0;border-top:0}.aside-tool,.policy-nav{margin-top:18px}.article-body{font-size:18px}.article-body h2{font-size:28px}.article-tools{padding:20px}.tool-card-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr}.related-grid article,.related-grid article+article{padding:25px 0;border-left:0;border-bottom:1px solid var(--line)}.tool-hero{margin:52px auto 58px}.tool-hero h1{font-size:42px}.tool-hero-copy>p:not(.eyebrow){font-size:18px}.tool-form div{grid-template-columns:1fr}.tool-content-grid{grid-template-columns:1fr;gap:42px}.info-header{margin:52px auto 40px;padding-bottom:38px}.info-header h1{font-size:42px}.info-header>p:not(.eyebrow){font-size:18px}.info-body{font-size:17px}.info-body h2{font-size:27px}.footer-inner{grid-template-columns:1fr;padding-block:38px;gap:22px}.footer-inner nav{flex-wrap:wrap}}
@media(max-width:440px){.header-inner{width:min(calc(100% - 28px),var(--max))}.header-inner nav a:last-child{display:none}.measure,.library,.tool-directory,.breadcrumbs,.article-header,.article-layout,.info-layout,.tool-hero,.tool-content-grid,.tool-notes,.tool-faq,.tool-links,.footer-inner{width:min(calc(100% - 28px),var(--max))}.guide-hero h1,.tool-index-hero h1{font-size:38px}.article-header h1,.tool-hero h1{font-size:36px}.article-body>p:first-child{font-size:20px}.article-body table{font-size:12px}.article-body th,.article-body td{padding:9px 7px}.tool-directory-grid{display:block}.tool-directory-card,.tool-directory-card:nth-child(odd),.tool-directory-card:nth-child(even){min-height:0;padding:26px 0;border-right:0}.tool-form{padding:20px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Shared product skin for guides, tools, and information pages. */
:root{--ink:#fff;--muted:#a1a1ad;--line:#24242e;--paper:#000;--soft:#0a0a0d;--accent:#60a5fa;--reading:760px;--font-sans:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
body{background:#000;color:var(--ink);font-family:var(--font-sans);-webkit-font-smoothing:antialiased}
a:hover{color:var(--accent)}
.skip-link{background:#fff;color:#000}
.site-header,.site-footer{background:#000;border-color:var(--line)}
.header-inner{height:68px}
.wordmark{font-weight:800;letter-spacing:.16em}
.header-inner nav a{color:var(--muted)}
.header-inner nav a:hover,.header-inner nav a[aria-current="page"]{color:#fff}
.eyebrow{color:#858591;letter-spacing:.18em}
.guide-hero,.tool-index-hero{padding:76px 0 72px;text-align:center;background:#000}
.guide-hero h1,.tool-index-hero h1{max-width:780px;margin-inline:auto;font-size:clamp(38px,5vw,62px);line-height:1.08;letter-spacing:-.04em}
.hero-copy{max-width:640px;margin:22px auto 24px;color:var(--muted);font-size:17px;line-height:1.65}
.primary-link,.text-link,.tool-directory-card>a,.aside-tool a{color:var(--accent)}
.tool-strip{justify-content:center;margin-top:29px}
.tool-strip a{background:#0e0e12;border-color:var(--line);color:#e7e7eb;border-radius:7px}
.tool-strip a:hover{background:#14141a;border-color:#3b82f6}
.library,.tool-directory{padding-block:70px 84px}
.article-grid,.tool-directory-grid{border-top-color:var(--line)}
.article-card h3,.tool-directory-card h3{letter-spacing:0}
.card-meta span:first-child,.related-grid span{color:var(--accent)}
.standards,.related{background:#0a0a0d}
.standards>p{color:var(--muted);font-size:16px}
.breadcrumbs{margin-top:24px}
.article-header{margin-block:62px 52px}
.article-header h1,.tool-hero h1,.info-header h1{letter-spacing:-.04em}
.dek,.article-body,.info-body,.tool-hero-copy>p:not(.eyebrow),.tool-notes li,.info-header>p:not(.eyebrow){font-family:var(--font-sans)}
.dek{font-size:19px;line-height:1.65}
.article-body,.info-body{color:#d4d4dc;font-size:17px;line-height:1.8}
.article-body>p:first-child,.info-body>p:first-child{font-size:19px}
.article-body h2,.article-body h3,.article-body h4,.info-body h2,.info-body h3{font-family:var(--font-sans);letter-spacing:0}
.article-body blockquote{color:#b5b5c2}
.article-body code{color:#e3e3e9}
.article-body pre{background:#0e0e12;border:1px solid var(--line)}
.page-toc{border-top-color:var(--line)}
.article-tools{background:#0e0e12}
.tool-card{background:#14141a;color:#fff}
.tool-card:hover{background:#1a1a24;border-color:#3b82f6}
.tool-mark{background:#0e0e12;color:var(--accent)}
.tool-hero{grid-template-columns:minmax(0,1fr) minmax(350px,470px);gap:64px;margin-block:58px 68px}
.tool-hero h1{font-size:clamp(38px,5vw,62px)}
.tool-hero-copy>p:not(.eyebrow){font-size:18px;line-height:1.65}
.tool-form{background:#0e0e12;border-color:var(--line);border-radius:8px}
.tool-form div{grid-template-columns:minmax(0,1fr) auto;gap:8px}
.tool-form input{background:#0d0d11;border-color:#2a2a38;color:#fff;font-family:var(--font-sans)}
.tool-form input::placeholder{color:#858591}
.tool-form input:focus{outline:2px solid #60a5fa;outline-offset:2px}
.tool-form button{background:#2563eb;border:1px solid #2563eb;color:#fff;font-family:var(--font-sans)}
.tool-form button:hover{background:#1d4ed8}
.check-list li,.number-list li,.tool-notes li{color:#d4d4dc}
.tool-notes li{font-size:16px;line-height:1.7}
.tool-links>div{border-top-color:var(--line)}
.info-header>p:not(.eyebrow){font-size:18px}
.reading-path ol{border-top-color:var(--line)}
.footer-inner{min-height:150px}
@media(max-width:980px){.tool-hero{grid-template-columns:1fr;gap:28px}}
@media(max-width:760px){.guide-hero,.tool-index-hero{padding:58px 0}.guide-hero h1,.tool-index-hero h1{font-size:clamp(35px,8vw,44px)}.hero-copy{font-size:16px}.tool-hero{margin-block:48px 54px}.tool-hero h1{font-size:clamp(35px,8vw,44px)}.tool-form div{grid-template-columns:1fr}.article-body,.info-body{font-size:16px}.article-body>p:first-child,.info-body>p:first-child{font-size:18px}}

/* Compact, icon-led directory and guide navigation. */
.guide-hero,.tool-index-hero{padding:48px 0 44px}
.guide-hero h1,.tool-index-hero h1{max-width:820px;font-size:clamp(36px,4.2vw,54px)}
.hero-copy{margin-block:16px 0}
.tool-directory,.library{padding-block:44px 68px}
.library-head{margin-bottom:20px}
.tool-directory-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;border:0}
.tool-directory-card,.tool-directory-card:not(:nth-child(4n)),.tool-directory-card:not(:nth-child(4n+1)),.tool-directory-card:nth-child(odd),.tool-directory-card:nth-child(even){position:relative;display:flex;flex-direction:column;min-height:180px;padding:20px;border:1px solid var(--line);border-radius:8px;background:#0e0e12;transition:background .18s ease,border-color .18s ease,transform .18s ease}
.tool-directory-card:hover,.tool-directory-card:focus-within{background:#14141a;border-color:var(--tile-accent);transform:translateY(-2px)}
.tool-directory-card h3{max-width:220px;margin:14px 0 0;font-size:18px;line-height:1.22;letter-spacing:0}
.tool-directory-card h3 a::after,.article-card h3 a::after{content:"";position:absolute;inset:0}
.tool-directory-card h3 a:focus-visible,.article-card h3 a:focus-visible{outline:0}
.tool-directory-card p{margin:9px 0 0;color:var(--muted);font-size:13px;line-height:1.45}
.tool-mark,.guide-mark,.tool-hero-mark{display:inline-flex;align-items:center;justify-content:center;flex:none;width:46px;height:46px;padding:0;border:1px solid #30303a;border-radius:8px;background:#17171e;color:var(--tile-accent,var(--accent))}
.tool-mark{margin:0}
.tool-mark svg,.guide-mark svg,.tool-hero-mark svg{width:23px;height:23px}
.tile-arrow{position:absolute;top:21px;right:20px;width:18px;height:18px;color:#8a8a96;transition:color .18s ease,transform .18s ease}
.tool-directory-card:hover .tile-arrow{color:var(--tile-accent);transform:translate(2px,-2px)}
.article-grid{gap:12px;border:0}
.article-card,.article-card:nth-child(odd),.article-card:nth-child(even){position:relative;display:flex;flex-direction:column;min-height:270px;padding:22px;border:1px solid var(--line);border-radius:8px;background:#0e0e12;transition:background .18s ease,border-color .18s ease,transform .18s ease}
.article-card:hover,.article-card:focus-within{background:#14141a;border-color:#3b82f6;transform:translateY(-2px)}
.guide-mark{width:40px;height:40px;margin-top:20px;color:#60a5fa}
.guide-mark svg{width:21px;height:21px}
.article-card h3{margin:14px 0 10px;font-size:21px;line-height:1.28}
.article-card>p{font-size:13px;line-height:1.55}
.card-foot{margin-top:auto;padding-top:20px}
.card-foot span{display:inline-flex;align-items:center;gap:5px;color:#b8d5ff;font-weight:700;white-space:nowrap}
.card-foot svg{width:15px;height:15px}
.primary-link{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:42px;margin-top:23px;padding:0 16px;border:1px solid #2563eb;border-radius:7px;background:#2563eb;color:#fff;font-size:13px}
.primary-link:hover{background:#1d4ed8;color:#fff}
.primary-link svg{width:16px;height:16px}
.tool-strip{margin-top:18px}
.tool-strip a{gap:8px;min-height:38px;padding:7px 11px}
.tool-strip svg{width:16px;height:16px;color:#9bc5ff}
.article-header-mark{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;margin:0 auto 18px;border:1px solid #30303a;border-radius:8px;background:#17171e;color:#60a5fa}
.article-header-mark svg{width:24px;height:24px}
.article-header{margin-block:48px 44px}
.tool-hero{grid-template-columns:minmax(0,1fr) minmax(350px,490px);gap:50px;margin-block:42px 52px}
.tool-hero-mark{width:52px;height:52px;margin:0 0 18px}
.tool-hero-mark svg{width:27px;height:27px}
.tool-icon-youtube-downloader{--tile-accent:#ff4d4d}.tool-icon-tiktok-downloader{--tile-accent:#69d9e5}.tool-icon-instagram-downloader{--tile-accent:#f274a1}.tool-icon-twitter-video-downloader{--tile-accent:#f2f2f5}.tool-icon-facebook-video-downloader{--tile-accent:#5a9dff}.tool-icon-mp3-downloader{--tile-accent:#4bd6b3}.tool-icon-mp4-downloader{--tile-accent:#f0bd69}.tool-icon-playlist-downloader{--tile-accent:#b49af0}
.tool-form{padding:22px;background:#101014}
.tool-form div{grid-template-columns:minmax(0,1fr) auto;gap:8px}
.tool-form button{display:inline-flex;align-items:center;justify-content:center;gap:8px;white-space:nowrap}
.tool-form button svg{width:17px;height:17px}
.tool-content-grid{padding-top:42px}
@media(max-width:980px){.tool-directory-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-hero{grid-template-columns:1fr;gap:26px}}
@media(max-width:620px){.guide-hero,.tool-index-hero{padding:40px 0 38px}.guide-hero h1,.tool-index-hero h1{font-size:36px}.hero-copy{font-size:15px}.tool-strip{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.tool-strip a{justify-content:center;gap:5px;width:100%;padding-inline:5px;font-size:11px;white-space:nowrap}.tool-strip svg{width:14px;height:14px;flex:none}.library,.tool-directory{padding-block:35px 58px}.library-head h2{font-size:27px}.tool-directory-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}.tool-directory-card,.tool-directory-card:not(:nth-child(4n)),.tool-directory-card:not(:nth-child(4n+1)),.tool-directory-card:nth-child(odd),.tool-directory-card:nth-child(even){min-height:190px;padding:16px}.tool-directory-card h3{font-size:16px}.tool-directory-card p{font-size:12px}.tile-arrow{top:18px;right:16px}.article-grid{display:grid;grid-template-columns:1fr}.article-card,.article-card:nth-child(odd),.article-card:nth-child(even){min-height:240px;padding:20px}.tool-form div{grid-template-columns:1fr}.tool-hero{margin-block:34px 42px}.tool-hero-mark{margin-bottom:14px}}
@media(max-width:360px){.tool-directory-grid{grid-template-columns:1fr}.tool-directory-card,.tool-directory-card:not(:nth-child(4n)),.tool-directory-card:not(:nth-child(4n+1)),.tool-directory-card:nth-child(odd),.tool-directory-card:nth-child(even){min-height:165px}}
@media(max-width:620px){.article-header{margin-block:32px 34px;text-align:left}.article-header-mark{margin-left:0}.article-header h1{font-size:34px;line-height:1.12}.dek{margin:17px 0;color:var(--muted);font-size:16px;line-height:1.55}.byline{justify-content:flex-start;gap:7px 12px}.byline span+span{padding-left:12px}.article-aside{margin-bottom:28px}}
@media(prefers-reduced-motion:reduce){.tool-directory-card,.article-card,.tile-arrow{transition:none}}
.review-note{max-width:650px;margin:14px auto 0;color:#8d8d99;font-size:12px;line-height:1.5}
@media(max-width:620px){.review-note{margin-inline:0}}