/* ============================================================
   CalculatorsPPM — "Clear Lab" design system (v22, 2026-10-09)
   A complete, human-made redesign. Same brand palette, new look.
   Palette: paper #fbfaf7 · ink #14202f · navy #0b1628 ·
            orange #e46f16 · line #e6e2d9 · muted #667085
   ============================================================ */

/* ---------- Tokens & reset ---------- */
:root{
  --paper:#fbfaf7; --card:#ffffff; --ink:#14202f; --ink-soft:#3d4b5f;
  --muted:#667085; --faint:#98a2b3;
  --line:#e6e2d9; --line-soft:#efece4;
  --navy:#0b1628; --navy-2:#13233a;
  --orange:#e46f16; --orange-deep:#c25e10; --orange-soft:#fdf1e3;
  --green:#16785a; --green-soft:#e9f5ef;
  --danger:#b42318;
  --radius:14px; --radius-lg:20px;
  --shadow:0 1px 2px rgba(16,24,40,.05),0 12px 32px -12px rgba(16,24,40,.12);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --serif:Georgia,"Times New Roman",serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);background:var(--paper);color:var(--ink);
  font-size:16.5px;line-height:1.65;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.015em;color:var(--ink);text-wrap:balance}
h1{font-size:clamp(34px,4.6vw,54px);font-weight:750;margin:0 0 14px}
h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin:0 0 12px}
h3{font-size:20px;font-weight:650;margin:0 0 8px}
p{margin:0 0 14px;color:var(--ink-soft)}
a{color:var(--orange-deep);text-decoration:none}
a:hover{text-decoration:underline}
img,svg{max-width:100%;height:auto}
.container{width:min(1160px,100% - 40px);margin:0 auto}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;padding:10px 16px;z-index:200;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
::selection{background:#fbd9ae}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:650;font-size:15.5px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;cursor:pointer;
  transition:transform .12s ease,box-shadow .12s ease,background .12s ease}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--orange);color:#fff;box-shadow:0 8px 20px -8px rgba(228,111,22,.6)}
.btn-primary:hover{background:var(--orange-deep);color:#fff}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{background:var(--navy-2);color:#fff}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn-sm{padding:9px 16px;font-size:14px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(251,250,247,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;gap:28px;height:68px}
.brand{display:flex;align-items:center;flex-shrink:0}
.brand-logo{height:38px;width:auto;display:block}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-link,.nav-drop-btn{font-size:15px;font-weight:550;color:var(--ink-soft);padding:9px 14px;
  border-radius:999px;background:none;border:0;cursor:pointer;font-family:var(--font)}
.nav-link:hover,.nav-drop-btn:hover{color:var(--ink);background:#f1ede3;text-decoration:none}
.nav-link.active{color:var(--ink);background:#ece7d9}
.nav-dropdown{position:relative}
.nav-drop-btn{display:inline-flex;align-items:center;gap:6px}
.nav-drop-btn .chev{font-size:11px;transition:transform .15s}
.nav-drop-btn[aria-expanded="true"] .chev{transform:rotate(180deg)}
.drop-menu{position:absolute;top:calc(100% + 10px);left:0;min-width:320px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);
  padding:8px;display:none}
.drop-menu.open{display:block}
.drop-menu a{display:flex;flex-direction:column;gap:2px;padding:10px 12px;border-radius:10px;color:var(--ink)}
.drop-menu a:hover{background:var(--orange-soft);text-decoration:none}
.drop-menu a strong{font-size:14.5px;font-weight:650}
.drop-menu a span{font-size:12.5px;color:var(--muted)}
.drop-menu .drop-all{border-bottom:1px solid var(--line-soft);margin-bottom:6px;padding-bottom:12px}
.nav-cta{margin-left:auto;flex-shrink:0}
.menu-toggle{display:none;background:none;border:1px solid var(--line);border-radius:10px;
  font-size:20px;padding:6px 12px;cursor:pointer;color:var(--ink)}

/* ---------- Hero (homepage) ---------- */
.hero{padding:72px 0 60px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background:radial-gradient(640px 320px at 12% 8%,#fbeed7 0%,transparent 60%),
             radial-gradient(560px 300px at 88% 20%,#e8eefb 0%,transparent 60%);pointer-events:none}
.hero-inner{position:relative;max-width:820px}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
  letter-spacing:.16em;text-transform:uppercase;color:var(--orange-deep)}
.hero-kicker::before{content:"";width:22px;height:2px;background:var(--orange)}
.hero h1{margin:18px 0 16px}
.hero h1 em{font-family:var(--serif);font-style:italic;font-weight:400;color:var(--orange-deep)}
.hero-sub{font-size:19px;color:var(--ink-soft);max-width:60ch;margin-bottom:30px}
.hero-search{display:flex;background:var(--card);border:1px solid var(--line);border-radius:999px;
  padding:6px;box-shadow:var(--shadow);max-width:640px}
.hero-search input{flex:1;border:0;outline:0;background:transparent;font-size:16px;
  padding:12px 18px;color:var(--ink);min-width:0;font-family:var(--font)}
.hero-search input::placeholder{color:var(--faint)}
.hero-stats{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:26px;font-size:14px;color:var(--muted)}
.hero-stats strong{color:var(--ink);font-variant-numeric:tabular-nums}
.quick-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.quick-links span{font-size:13.5px;color:var(--faint);align-self:center}
.chip{display:inline-flex;align-items:center;font-size:13.5px;font-weight:550;color:var(--ink-soft);
  background:var(--card);border:1px solid var(--line);border-radius:999px;padding:7px 15px}
.chip:hover{border-color:var(--orange);color:var(--orange-deep);text-decoration:none}

/* ---------- Sections ---------- */
.section{padding:60px 0}
.section-head{max-width:720px;margin-bottom:32px}
.section-label{font-size:12.5px;font-weight:700;letter-spacing:.16em;text-transform:uppercase;
  color:var(--orange-deep);display:flex;align-items:center;gap:10px;margin-bottom:12px}
.section-label::before{content:"";width:22px;height:2px;background:var(--orange)}
.section-head h2{margin:0 0 10px}
.section-head p{font-size:17px;margin:0}
.section-head.split{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;max-width:none}
.link-arrow{font-weight:650;font-size:15px;white-space:nowrap}

/* ---------- Category cards ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px;display:flex;flex-direction:column;gap:10px;color:var(--ink);
  transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease;position:relative}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#d8d2c2;text-decoration:none}
.cat-card .cat-icon{width:46px;height:46px;border-radius:13px;background:var(--orange-soft);
  display:flex;align-items:center;justify-content:center;color:var(--orange-deep)}
.cat-card .cat-icon svg{width:24px;height:24px}
.cat-card h3{margin:2px 0 0;font-size:19px}
.cat-card p{font-size:14.5px;margin:0;flex:1}
.cat-card .cat-meta{display:flex;justify-content:space-between;align-items:center;margin-top:8px;
  font-size:13.5px;color:var(--muted)}
.cat-card .cat-count{font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}
.cat-card .cat-go{color:var(--orange-deep);font-weight:650}

/* ---------- Tool cards ---------- */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;color:var(--ink);display:flex;flex-direction:column;gap:8px;
  transition:transform .15s ease,box-shadow .15s ease,border-color .15s ease}
.tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);border-color:#d8d2c2;text-decoration:none}
.tool-card .tool-cat{font-size:11.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--faint)}
.tool-card h3{font-size:16.5px;margin:0}
.tool-card p{font-size:14px;margin:0;color:var(--muted);flex:1}
.tool-card .tool-go{font-size:14px;font-weight:650;color:var(--orange-deep)}

/* ---------- Finder ---------- */
.finder{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px;box-shadow:var(--shadow)}
.finder-controls{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:20px}
.finder-tabs{display:flex;flex-wrap:wrap;gap:8px}
.finder-tab{border:1px solid var(--line);background:var(--paper);border-radius:999px;
  padding:9px 18px;font-size:14px;font-weight:600;color:var(--ink-soft);cursor:pointer;font-family:var(--font)}
.finder-tab:hover{border-color:var(--ink)}
.finder-tab.is-active{background:var(--navy);border-color:var(--navy);color:#fff}
.finder-search{flex:1;min-width:220px;display:flex;align-items:center;gap:10px;
  border:1px solid var(--line);border-radius:999px;padding:0 18px;background:var(--paper)}
.finder-search svg{width:18px;height:18px;color:var(--faint);flex-shrink:0}
.finder-search input{flex:1;border:0;outline:0;background:transparent;font-size:15px;
  padding:12px 0;color:var(--ink);font-family:var(--font);min-width:0}
.finder-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}
.finder-empty{padding:30px;text-align:center;color:var(--muted)}

/* ---------- Tool page ---------- */
.breadcrumb{font-size:13.5px;color:var(--muted);margin:26px 0 18px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--orange-deep)}
.breadcrumb .sep{color:var(--faint)}
.tool-hero{margin-bottom:28px;max-width:860px}
.tool-hero h1{margin:0 0 12px}
.tool-hero .lede{font-size:19px;color:var(--ink-soft);max-width:64ch}
.calc-shell{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow);overflow:hidden;margin-bottom:34px}
.calc-shell-head{display:flex;align-items:center;gap:12px;padding:18px 28px;
  border-bottom:1px solid var(--line-soft);background:linear-gradient(180deg,#fffdf8,#fff)}
.calc-shell-head .dot{width:10px;height:10px;border-radius:50%;background:var(--orange)}
.calc-shell-head h2{font-size:17px;margin:0}
.calc-shell-head span{font-size:13.5px;color:var(--muted);margin-left:auto}
.calc-body{padding:28px}
.calc-figure{background:var(--paper);border:1px solid var(--line-soft);border-radius:var(--radius);
  padding:20px;margin-bottom:26px;text-align:center}
.calc-figure img{display:block;margin:0 auto;max-height:300px;width:auto}
.calc-figure figcaption{font-size:13px;color:var(--muted);margin-top:10px}

/* ---------- Calculator form ---------- */
.calc-form{display:grid;gap:18px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.form-group{display:flex;flex-direction:column;gap:7px}
.form-group label{font-size:14px;font-weight:650;color:var(--ink)}
.form-group .hint{font-size:12.5px;color:var(--faint);font-weight:400}
.form-control{font-family:var(--font);font-size:16px;color:var(--ink);background:var(--paper);
  border:1px solid var(--line);border-radius:12px;padding:13px 15px;width:100%;
  transition:border-color .12s,box-shadow .12s}
.form-control:focus{outline:0;border-color:var(--orange);box-shadow:0 0 0 3px rgba(228,111,22,.15);background:#fff}
select.form-control{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23667085' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:36px}
.input-row{display:flex;gap:8px}
.input-row .form-control{flex:1}
.input-row .unit-select{flex:0 0 118px}
.calc-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.calc-note{font-size:13.5px;color:var(--muted);background:var(--paper);
  border:1px dashed var(--line);border-radius:12px;padding:12px 16px}

/* ---------- Results ---------- */
.result-panel{margin-top:22px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}
.result-main{background:var(--navy);color:#fff;padding:24px 28px}
.result-label{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#f5b97e;margin-bottom:6px}
.result-value{font-size:clamp(30px,4vw,44px);font-weight:750;letter-spacing:-.01em;
  font-variant-numeric:tabular-nums;line-height:1.15}
.result-value small{font-size:.5em;font-weight:500;color:#b9c4d6}
.result-sub{font-size:14px;color:#b9c4d6;margin-top:8px}
.result-steps{background:var(--paper);padding:18px 28px;font-size:14.5px;color:var(--ink-soft);
  border-top:1px solid var(--line-soft)}
.result-steps ol,.result-steps ul{margin:8px 0 0;padding-left:20px}
.result-error{background:#fdf0ef;border:1px solid #f5c6c0;color:var(--danger);
  border-radius:var(--radius);padding:16px 20px;font-size:15px}

/* ---------- Article content ---------- */
.article{max-width:760px}
.article .lede{font-size:20px;line-height:1.7;color:var(--ink-soft)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 24px;margin:26px 0}
.toc h2{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}
.toc ol{margin:0;padding:0;list-style:none;display:grid;gap:6px;columns:2}
.toc a{font-size:14.5px;color:var(--ink-soft)}
.toc a:hover{color:var(--orange-deep)}
.content-block{margin:34px 0}
.content-block .sec-label{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--orange-deep);margin-bottom:8px;display:block}
.content-block h2{margin-top:0}
.formula-card{background:var(--navy);color:#f2f5fa;border-radius:var(--radius);padding:26px 30px;margin:22px 0}
.formula-card .formula-label{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#f5b97e;margin-bottom:10px;display:block}
.formula-card .formula-eq{font-size:clamp(19px,2.6vw,26px);font-weight:650;font-family:var(--mono);line-height:1.5}
.formula-card .formula-note{font-size:13.5px;color:#aeb9cc;margin:12px 0 0}
.example-card{background:var(--orange-soft);border:1px solid #f3ddba;border-radius:var(--radius);padding:22px 26px;margin:22px 0}
.example-card .example-label{font-size:12px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--orange-deep);margin-bottom:8px;display:block}
.example-card p{margin:0;color:#5b4a2f;font-size:15.5px}
.note-card{background:#f0f4fa;border:1px solid #d7e3f2;border-radius:12px;padding:16px 20px;font-size:14.5px;margin:20px 0}
.note-card p{margin:0}
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);margin:20px 0;background:var(--card)}
table.data{width:100%;border-collapse:collapse;font-size:14.5px;min-width:440px}
table.data th{background:var(--paper);text-align:left;font-weight:700;font-size:13px;
  letter-spacing:.04em;text-transform:uppercase;color:var(--muted);padding:12px 16px;border-bottom:1px solid var(--line)}
table.data td{padding:11px 16px;border-bottom:1px solid var(--line-soft);font-variant-numeric:tabular-nums}
table.data tr:last-child td{border-bottom:0}
.step-list{counter-reset:step;list-style:none;padding:0;display:grid;gap:10px;margin:18px 0}
.step-list li{counter-increment:step;position:relative;background:var(--card);border:1px solid var(--line);
  border-radius:12px;padding:14px 16px 14px 56px;font-size:15.5px}
.step-list li::before{content:counter(step);position:absolute;left:16px;top:14px;width:28px;height:28px;
  border-radius:50%;background:var(--navy);color:#fff;font-size:13.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center}
.check-list,.cross-list{list-style:none;padding:0;display:grid;gap:10px;margin:18px 0}
.check-list li{background:var(--green-soft);border:1px solid #cde7d8;border-radius:12px;padding:12px 16px 12px 44px;position:relative;font-size:15px}
.check-list li::before{content:"✓";position:absolute;left:16px;top:12px;color:var(--green);font-weight:800}
.cross-list li{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 16px 12px 44px;position:relative;font-size:15px}
.cross-list li::before{content:"✕";position:absolute;left:16px;top:12px;color:var(--danger);font-weight:800}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:10px;margin:20px 0}
.faq-list details{background:var(--card);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.faq-list summary{cursor:pointer;list-style:none;padding:16px 20px;font-weight:650;font-size:15.5px;
  display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";font-size:20px;color:var(--orange-deep);font-weight:400;flex-shrink:0;
  transition:transform .15s}
.faq-list details[open] summary::after{transform:rotate(45deg)}
.faq-list details>div,.faq-list details>p{padding:0 20px 18px;font-size:15px;color:var(--ink-soft);margin:0}

/* ---------- Related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px;margin-top:16px}

/* ---------- Guides ---------- */
.guide-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.guide-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  overflow:hidden;color:var(--ink);display:flex;flex-direction:column;
  transition:transform .15s ease,box-shadow .15s ease}
.guide-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);text-decoration:none}
.guide-card img{width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;display:block;background:var(--line-soft)}
.guide-card-body{padding:20px;display:flex;flex-direction:column;gap:8px;flex:1}
.guide-card .guide-cat{font-size:11.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--orange-deep)}
.guide-card h3{font-size:17.5px;margin:0}
.guide-card p{font-size:14px;color:var(--muted);margin:0;flex:1}
.guide-card .guide-meta{font-size:12.5px;color:var(--faint)}
.article-hero-img{border-radius:var(--radius-lg);overflow:hidden;margin:24px 0;border:1px solid var(--line)}
.article-hero-img img{display:block;width:100%;height:auto}

/* ---------- Directory page ---------- */
.dir-group{margin-bottom:44px}
.dir-group-head{display:flex;align-items:baseline;gap:14px;margin-bottom:18px;
  padding-bottom:12px;border-bottom:2px solid var(--ink)}
.dir-group-head h2{margin:0;font-size:24px}
.dir-group-head .count{font-size:14px;color:var(--muted);font-variant-numeric:tabular-nums}
.dir-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:10px}
.dir-item{display:flex;align-items:center;gap:12px;background:var(--card);border:1px solid var(--line);
  border-radius:12px;padding:13px 16px;color:var(--ink);font-size:15px;font-weight:550}
.dir-item:hover{border-color:var(--orange);text-decoration:none}
.dir-item .go{margin-left:auto;color:var(--faint);flex-shrink:0}
.dir-item:hover .go{color:var(--orange-deep)}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy);color:#aeb9cc;margin-top:40px}
.footer-top{padding:56px 0 40px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.footer-brand p{font-size:14.5px;color:#8b97ab;max-width:32ch}
.footer-brand .brand-logo{height:36px;filter:brightness(0) invert(1)}
.footer-col h3{color:#fff;font-size:14px;letter-spacing:.08em;text-transform:uppercase;margin:0 0 16px}
.footer-col a{display:block;color:#aeb9cc;font-size:14.5px;padding:5px 0}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;
  flex-wrap:wrap;gap:10px 24px;justify-content:space-between;font-size:13.5px;color:#8b97ab}
.footer-bottom nav{display:flex;flex-wrap:wrap;gap:6px 18px}
.footer-bottom a{color:#8b97ab}

/* ---------- Misc page bits ---------- */
.page-hero{padding:60px 0 10px;max-width:820px}
.page-hero h1{margin-bottom:12px}
.page-hero p{font-size:18px}
.prose{max-width:760px;padding-bottom:60px}
.prose h2{margin-top:36px}
.rating-row{display:flex;align-items:center;gap:10px;margin:20px 0;font-size:14.5px;color:var(--muted)}
.stars{color:#f5a623;letter-spacing:2px}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .footer-top{grid-template-columns:1fr 1fr}
  .main-nav{display:none;position:absolute;top:68px;left:0;right:0;background:var(--paper);
    flex-direction:column;align-items:stretch;padding:12px 20px 20px;border-bottom:1px solid var(--line);margin:0}
  .main-nav.open{display:flex}
  .nav-dropdown{width:100%}
  .drop-menu{position:static;box-shadow:none;border:0;border-top:1px solid var(--line-soft);
    border-radius:0;min-width:0}
  .menu-toggle{display:block;margin-left:auto}
  .nav-cta{margin-left:0}
  .nav-wrap{gap:12px}
}
@media (max-width:640px){
  body{font-size:16px}
  .hero{padding:52px 0 44px}
  .hero-search{flex-wrap:wrap;border-radius:20px}
  .hero-search input{flex:1 1 100%;padding:12px 16px}
  .hero-search .btn{flex:1;justify-content:center}
  .section{padding:44px 0}
  .calc-body{padding:20px}
  .form-grid{grid-template-columns:1fr}
  .toc ol{columns:1}
  .footer-top{grid-template-columns:1fr}
  .section-head.split{flex-direction:column;align-items:flex-start}
  .result-main{padding:20px}
}
/* ---------- v20 long-form tool content (ported) ---------- */
.new-calculator-content .lede{font-size:20px;line-height:1.7;color:var(--ink-soft)}
.new-calculator-content h2{margin-top:38px;scroll-margin-top:90px}
.content-section h2,.content-block h2{scroll-margin-top:90px}
.steps-list{counter-reset:step;display:grid;gap:10px;padding:0;list-style:none;margin:18px 0}
.steps-list li{counter-increment:step;position:relative;padding:14px 16px 14px 56px;background:var(--card);
  border:1px solid var(--line);border-radius:12px;font-size:15.5px}
.steps-list li::before{content:counter(step);position:absolute;left:16px;top:14px;width:28px;height:28px;
  border-radius:50%;background:var(--navy);color:#fff;font-size:13.5px;font-weight:700;
  display:flex;align-items:center;justify-content:center}
.new-calculator-content .example-box{background:var(--orange-soft);border:1px solid #f3ddba;
  border-left:4px solid var(--orange);border-radius:12px;padding:20px 24px;margin:20px 0}
.new-calculator-content .example-box p{margin:0;font-size:15.5px;line-height:1.7;color:#5b4a2f}
.new-calculator-content .note{background:#f0f4fa;border:1px solid #d7e3f2;border-radius:12px;
  padding:14px 18px;font-size:14.5px}
.table-wrap{overflow-x:auto;margin:20px 0;border:1px solid var(--line);border-radius:12px;background:var(--card)}
.table-wrap .accuracy-table{margin:0;border:0;min-width:440px}
.table-note{font-size:13.5px;color:var(--muted);font-style:italic}
.uses-list,.takeaways-list{display:grid;gap:10px;padding:0;list-style:none;margin:18px 0}
.uses-list li,.takeaways-list li{background:var(--green-soft);border:1px solid #cde7d8;border-radius:12px;
  padding:12px 16px 12px 44px;position:relative;font-size:15px}
.uses-list li::before,.takeaways-list li::before{content:"✓";position:absolute;left:16px;top:12px;
  color:var(--green);font-weight:800}
.mistakes-list{display:grid;gap:10px;padding:0;list-style:none;margin:18px 0}
.mistakes-list li{padding:12px 16px 12px 44px;position:relative;font-size:15px;background:var(--card);
  border:1px solid var(--line);border-radius:12px}
.mistakes-list li::before{content:"✕";position:absolute;left:16px;top:12px;color:var(--danger);font-weight:800}
.takeaways-list li strong{color:var(--ink)}
.new-calculator-content .formula-box{background:var(--navy);color:#f2f5fa;border-radius:var(--radius);
  padding:22px 26px;margin:20px 0;font-family:var(--mono);font-size:17px;line-height:1.6;overflow-x:auto}

/* ---------- Reveal on scroll ---------- */
.cat-card,.tool-card,.guide-card,.dir-item{opacity:0;transform:translateY(14px);
  transition:opacity .5s ease,transform .5s ease;transition-delay:var(--reveal-delay,0ms)}
.cat-card.is-visible,.tool-card.is-visible,.guide-card.is-visible,.dir-item.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none!important}
  .cat-card,.tool-card,.guide-card,.dir-item{opacity:1;transform:none}
}

/* ---------- Form output (JS calculator) ---------- */
.btn-reset{background:var(--paper);border:1px solid var(--line);color:var(--ink-soft)}
.btn-reset:hover{border-color:var(--ink);color:var(--ink)}
.alert-error{background:#fdf0ef;border:1px solid #f5c6c0;color:var(--danger);
  border-radius:12px;padding:14px 18px;font-size:14.5px;margin-top:14px}
.result-box{margin-top:20px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.result-box .result-label{background:var(--paper);padding:10px 22px;font-size:12px;font-weight:700;
  letter-spacing:.12em;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--line-soft)}
.result-box .result-value{background:var(--navy);color:#fff;padding:20px 22px;
  font-size:clamp(26px,3.4vw,36px);font-weight:750;font-variant-numeric:tabular-nums}
.result-box .result-steps{padding:16px 22px;font-size:14.5px;color:var(--ink-soft);background:var(--card)}
.result-box .result-steps ol,.result-box .result-steps ul{margin:8px 0 0;padding-left:20px}

/* ---------- Feedback ---------- */
.calculator-feedback{margin-top:26px;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius);padding:24px;display:grid;gap:16px}
.feedback-kicker{font-size:11.5px;font-weight:700;letter-spacing:.14em;color:var(--faint)}
.calculator-feedback h2{font-size:18px;margin:4px 0 6px}
.calculator-feedback p{font-size:14px;margin:0}
.feedback-helpful{display:flex;gap:10px}
.feedback-choice{border:1px solid var(--line);background:var(--card);border-radius:999px;
  padding:9px 20px;font-size:15px;cursor:pointer;font-family:var(--font)}
.feedback-choice:hover{border-color:var(--orange)}
.feedback-rating-label{font-size:13.5px;color:var(--muted);margin-top:12px}
.feedback-stars{display:flex;gap:4px}
.feedback-stars button{background:none;border:0;font-size:26px;color:#d8d2c2;cursor:pointer;padding:2px}
.feedback-stars button.lit{color:#f5a623}
.feedback-comment{width:100%;min-height:76px;border:1px solid var(--line);border-radius:12px;
  padding:12px 14px;font-family:var(--font);font-size:14.5px;margin-top:12px;resize:vertical}
.feedback-submit{margin-top:10px}
.feedback-summary{font-size:14px;color:var(--muted)}

/* ---------- Legacy editorial blocks (kept compatible) ---------- */
.content-section{margin:36px 0;max-width:760px}
.formula-box{background:var(--navy);color:#f2f5fa;border-radius:var(--radius);padding:22px 26px;
  margin:20px 0;font-family:var(--mono);font-size:17px;line-height:1.6;overflow-x:auto}
.example-box{background:var(--orange-soft);border:1px solid #f3ddba;border-radius:var(--radius);
  padding:20px 24px;margin:20px 0;font-size:15.5px;color:#5b4a2f}
.related-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px;
  color:var(--ink);display:flex;flex-direction:column;gap:4px;
  transition:transform .15s ease,box-shadow .15s ease}
.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);text-decoration:none}
.related-card strong{font-size:15px}
.related-card span{font-size:13.5px;color:var(--muted)}
.programmatic-note{background:#fff8e6;border:1px solid #f0dfae;border-radius:12px;
  padding:14px 18px;font-size:14px;color:#6b5b2a;margin:20px 0}

/* ---------- Static/research pages ---------- */
.research-page{max-width:860px}
.research-lead{margin-bottom:30px}
.page-kicker,.section-kicker{font-size:12px;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--orange-deep);display:block;margin-bottom:10px}
.research-chart{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:24px;margin:24px 0;overflow-x:auto}
.chart-head{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px}
.chart-head h3{margin:0;font-size:17px}
.chart-note{font-size:13px;color:var(--faint)}
.research-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin:24px 0}
.research-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.research-card .about-icon{display:inline-flex;width:34px;height:34px;border-radius:50%;background:var(--navy);
  color:#fff;font-size:13px;font-weight:700;align-items:center;justify-content:center;margin-bottom:10px}
.research-card h2{font-size:18px;margin:0 0 8px}
.accuracy-table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);
  margin:20px 0;background:var(--card)}
.accuracy-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
.accuracy-table th{background:var(--paper);text-align:left;padding:12px 16px;font-size:12.5px;
  text-transform:uppercase;letter-spacing:.05em;color:var(--muted);border-bottom:1px solid var(--line)}
.accuracy-table td{padding:11px 16px;border-bottom:1px solid var(--line-soft)}
.source-links{font-size:14px}
.contact-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:28px;max-width:640px}
.contact-intro{max-width:680px;margin-bottom:28px}
.contact-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:20px;margin-bottom:24px}
.contact-info{display:grid;gap:14px;align-content:start}
.contact-info-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.contact-label{font-size:11.5px;font-weight:700;letter-spacing:.12em;color:var(--faint);display:block;margin-bottom:8px}
.contact-info-card p{font-size:14.5px;margin:6px 0 0}
.contact-form-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px}
.contact-form-card h2{font-size:20px;margin:0 0 18px}
.contact-form{display:grid;gap:14px}
.contact-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.contact-form label{display:grid;gap:6px;font-size:14px;font-weight:600}
.contact-form label span{color:var(--ink)}
.contact-form input[type=text],.contact-form input[type=email],.contact-form select,.contact-form textarea{
  font-family:var(--font);font-size:15px;color:var(--ink);background:var(--paper);
  border:1px solid var(--line);border-radius:12px;padding:12px 14px;width:100%}
.contact-form input:focus,.contact-form select:focus,.contact-form textarea:focus{
  outline:0;border-color:var(--orange);box-shadow:0 0 0 3px rgba(228,111,22,.15);background:#fff}
.hp-field{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.contact-note{background:var(--orange-soft);border:1px solid #f3ddba;border-radius:12px;
  padding:16px 20px;font-size:14.5px;color:#5b4a2f;max-width:860px}
.contact-success{background:var(--green-soft);border:1px solid #cde7d8;border-radius:12px;
  padding:18px 22px;margin-bottom:20px}
@media (max-width:760px){.contact-grid{grid-template-columns:1fr}.contact-form-grid{grid-template-columns:1fr}}