:root{--navy:#083b3f;--green:#12a36d;--green-dark:#08784f;--ink:#102326;--muted:#647276;--line:#e6eceb;--soft:#f5f8f7;--white:#fff;--shadow:0 18px 45px rgba(12,45,47,.1);--radius:5px;--container:1180px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.6}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.container{width:min(100% - 32px,var(--container));margin-inline:auto}
.skip-link{position:absolute;left:-999px;top:8px;background:var(--navy);color:#fff;padding:10px 14px;border-radius:5px;z-index:10}
.skip-link:focus{left:12px}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.7);backdrop-filter:blur(18px);border-bottom:1px solid transparent;transition:.25s ease}
.site-header.scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:0 10px 30px rgba(8,59,63,.07)}
.navbar{height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy);white-space:nowrap}
.brand img{width:auto;height:46px;object-fit:contain}
.brand-mark{display:grid;place-items:center;width:42px;height:42px;border-radius:5px;background:linear-gradient(135deg,var(--navy),var(--green));color:#fff;font-size:13px;letter-spacing:0}
.brand-text{font-size:18px}
.nav-menu{display:flex;align-items:center;gap:18px;font-size:14px;font-weight:700;color:#29494d}
.nav-menu a{transition:.2s ease}
.nav-menu a:hover,.nav-menu a.active{color:var(--green-dark)}
.nav-search{display:grid;place-items:center;width:40px;height:40px;border-radius:5px;background:#eef7f3;color:var(--green-dark)}
.nav-search svg{width:19px;height:19px}
.nav-toggle{display:none;width:42px;height:42px;border:1px solid var(--line);background:#fff;border-radius:5px;padding:9px}
.nav-toggle span{display:block;height:2px;background:var(--navy);margin:5px 0;border-radius:2px}
.hero{padding:104px 0 76px;background:linear-gradient(180deg,#f7fbfa 0%,#fff 100%)}
.hero-inner{text-align:center;max-width:860px}
.eyebrow{margin:0 0 10px;color:var(--green-dark);font-size:13px;font-weight:800;text-transform:uppercase;letter-spacing:.08em}
h1,h2,h3,p{margin-top:0}
h1{font-size:clamp(32px,4.5vw,48px);line-height:1.12;margin-bottom:16px;color:var(--navy);letter-spacing:0}
h2{font-size:clamp(24px,3vw,32px);line-height:1.2;color:var(--navy);letter-spacing:0}
h3{font-size:19px;line-height:1.28;color:var(--navy);letter-spacing:0}
.hero-subtitle{font-size:22px;color:#244a4f;margin-bottom:10px}
.hero-copy{max-width:760px;margin:0 auto 28px;color:var(--muted)}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:12px 22px;border-radius:5px;font-weight:800;transition:.2s ease}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 12px 24px rgba(18,163,109,.22)}
.btn-primary:hover{background:var(--green-dark);transform:translateY(-2px)}
.filter-band{margin-top:-34px;position:relative;z-index:3}
.filter-panel{display:grid;grid-template-columns:1fr 240px;gap:14px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:5px;padding:16px}
.search-field{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:5px;padding:0 16px;background:#fbfdfc}
.search-field svg{width:22px;height:22px;color:var(--green-dark);flex:0 0 auto}
input,select{width:100%;border:1px solid var(--line);border-radius:5px;min-height:52px;padding:0 16px;background:#fff;color:var(--ink);font:inherit;font-weight:650}
.search-field input{border:0;background:transparent;padding:0;outline:0}
select{appearance:auto}
.tools-section{padding:84px 0 72px}
.section-heading{margin-bottom:24px}
.section-heading.centered{text-align:center;max-width:720px;margin-inline:auto}
.section-heading p{color:var(--muted)}
.tabs{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-bottom:34px}
.tab{border:1px solid var(--line);background:#fff;color:#244a4f;min-height:44px;padding:9px 16px;border-radius:5px;font-weight:800;cursor:pointer;transition:.2s ease}
.tab:hover,.tab.active{border-color:var(--green);background:#eaf8f2;color:var(--green-dark)}
.category-panel{display:none}
.category-panel.active{display:block}
.tools-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.tools-grid.compact{grid-template-columns:repeat(2,minmax(0,1fr))}
.tool-card{display:flex;flex-direction:column;gap:18px;min-height:292px;padding:20px;border:1px solid rgba(8,59,63,.08);border-radius:var(--radius);background:#fff;box-shadow:0 8px 22px rgba(8,59,63,.05);transition:.2s ease}
.tool-card:nth-child(10n+1){background:#fff5f5}
.tool-card:nth-child(10n+2){background:#f1fbf6}
.tool-card:nth-child(10n+3){background:#f2f8ff}
.tool-card:nth-child(10n+4){background:#fffbe8}
.tool-card:nth-child(10n+5){background:#fff4ea}
.tool-card:nth-child(10n+6){background:#fff}
.tool-card:nth-child(10n+7){background:#f6f7f8}
.tool-card:nth-child(10n+8){background:#fff1ea}
.tool-card:nth-child(10n+9){background:#f4f6f1}
.tool-card:nth-child(10n+10){background:#f8f6fb}
.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d5e1df}
.tool-card[hidden]{display:none}
.tool-icon,.tool-hero-icon{display:grid;place-items:center;width:54px;height:54px;border-radius:5px;color:var(--navy)}
.tool-icon svg,.tool-hero-icon svg{width:28px;height:28px}
.tone-mint .tool-icon,.tool-hero-icon.tone-mint{background:#dcf8ec;color:#08784f}
.tone-sky .tool-icon,.tool-hero-icon.tone-sky{background:#e0f0ff;color:#176aa6}
.tone-aqua .tool-icon,.tool-hero-icon.tone-aqua{background:#daf7f3;color:#11746d}
.tone-amber .tool-icon,.tool-hero-icon.tone-amber{background:#fff0d5;color:#9a5d05}
.tone-violet .tool-icon,.tool-hero-icon.tone-violet{background:#efe8ff;color:#6842b8}
.tone-rose .tool-icon,.tool-hero-icon.tone-rose{background:#ffe6ed;color:#b93460}
.tone-lime .tool-icon,.tool-hero-icon.tone-lime{background:#e9f8d7;color:#547b13}
.tone-navy .tool-icon,.tool-hero-icon.tone-navy{background:#e4eeee;color:#083b3f}
.tool-card-body{flex:1}
.tool-category{margin:0 0 6px;color:var(--muted);font-size:13px;font-weight:800}
.tool-card h3{margin-bottom:8px;font-size:19px}
.tool-card p:last-child{color:var(--muted);font-size:15px;margin-bottom:0}
.tool-open{display:inline-flex;align-items:center;justify-content:center;min-height:42px;border-radius:5px;background:rgba(255,255,255,.68);border:1px solid rgba(8,59,63,.08);color:var(--green-dark);font-weight:850}
.tool-open:hover{background:var(--green);color:#fff}
.empty-state{text-align:center;background:#fff8e8;border:1px solid #f4ddb1;border-radius:5px;padding:18px;font-weight:800;color:#865a05}
.seo-content{background:var(--soft);padding:72px 0}
.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:28px;align-items:start}
.content-grid article,.topic-card,.calculator-panel,.side-panel,.faq,.related-articles{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 26px rgba(8,59,63,.05)}
.content-grid article{padding:32px}
.benefit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.benefit-grid div{background:#f7fbfa;border:1px solid var(--line);border-radius:5px;padding:18px}
.topic-card,.side-panel{padding:22px}
.topic-card a,.side-panel a,.site-footer a{display:block;color:#496165;margin:10px 0;font-weight:700}
.topic-card a:hover,.side-panel a:hover,.site-footer a:hover{color:var(--green-dark)}
.faq,.related-articles{padding:28px;margin-top:28px}
details{border-top:1px solid var(--line);padding:16px 0}
summary{cursor:pointer;font-weight:850;color:var(--navy)}
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.article-grid a{padding:18px;border-radius:5px;background:#f7fbfa;border:1px solid var(--line);font-weight:800}
.breadcrumbs{padding-top:22px}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0;color:var(--muted);font-size:14px;font-weight:750}
.breadcrumbs li:not(:last-child)::after{content:"/";margin-left:8px;color:#9aa8aa}
.breadcrumbs a{color:var(--green-dark)}
.tool-hero{padding:50px 0;background:linear-gradient(180deg,#f7fbfa,#fff)}
.tool-hero-grid{display:grid;grid-template-columns:1fr auto;align-items:center;gap:30px}
.tool-hero h1{font-size:clamp(30px,4vw,42px)}
.tool-hero p:last-child{max-width:720px;color:var(--muted);font-size:18px}
.tool-hero-icon{width:94px;height:94px;border-radius:5px}
.tool-hero-icon svg{width:46px;height:46px}
.page-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;padding:40px 0 76px;align-items:start}
.calculator-panel{padding:28px}
.calculator-head p,.tool-copy p{color:var(--muted)}
.calculator-form{padding-bottom:28px;border-bottom:1px solid var(--line)}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:20px 0}
label span{display:block;margin-bottom:7px;font-weight:800;color:#29494d}
.result-grid{display:grid;gap:14px}
.result-summary{display:grid;grid-template-columns:minmax(0,1fr) minmax(250px,360px);gap:24px;align-items:center;padding:22px;border-radius:5px;background:linear-gradient(135deg,#083b3f,#0d6f61);color:#fff;border:1px solid rgba(8,59,63,.12)}
.result-summary span{display:block;font-size:13px;font-weight:850;color:#cce9df;text-transform:uppercase;letter-spacing:.07em}
.result-summary strong{display:block;font-size:clamp(28px,4vw,42px);line-height:1.1;margin-top:8px;word-break:break-word}
.result-summary p{margin:10px 0 0;color:#d7ece7}
.summary-chart{display:grid;grid-template-columns:112px minmax(0,1fr);gap:16px;align-items:center;justify-self:end;width:100%;max-width:360px}
.summary-donut{width:112px;aspect-ratio:1;border-radius:50%;position:relative;box-shadow:0 12px 24px rgba(0,0,0,.12)}
.summary-donut::after{content:"";position:absolute;inset:24px;border-radius:50%;background:#0c655b;box-shadow:inset 0 0 0 1px rgba(255,255,255,.16)}
.summary-legend h3{margin:0 0 8px;color:#fff;font-size:16px}
.summary-legend{display:grid;gap:8px}
.summary-legend-row{display:grid;grid-template-columns:10px 1fr;gap:8px;align-items:start}
.summary-legend-row span{width:10px;height:10px;border-radius:3px;margin-top:5px}
.summary-legend-row p{margin:0;color:#d7ece7;font-size:13px;font-weight:750}
.summary-legend-row strong{display:block;margin-top:1px;color:#fff;font-size:15px;line-height:1.2}
.result-details{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.result-card{padding:18px;border-radius:5px;background:#f7fbfa;border:1px solid var(--line)}
.result-card span{display:block;color:var(--muted);font-size:13px;font-weight:800}
.result-card strong{display:block;color:var(--navy);font-size:24px;line-height:1.2;margin-top:6px;word-break:break-word}
.chart-panel{display:grid;grid-template-columns:180px minmax(0,1fr);gap:24px;align-items:center;margin-top:18px;padding:20px;border:1px solid var(--line);border-radius:5px;background:#fbfdfc}
.chart-panel[hidden]{display:none}
.chart-visual{width:180px;aspect-ratio:1;border-radius:50%;position:relative;box-shadow:inset 0 0 0 1px rgba(8,59,63,.08)}
.chart-visual::after{content:"";position:absolute;inset:32px;border-radius:50%;background:#fbfdfc;box-shadow:inset 0 0 0 1px rgba(8,59,63,.08)}
.chart-copy h3{margin-bottom:12px}
.chart-legend{display:grid;gap:10px}
.legend-row{display:grid;grid-template-columns:12px 1fr;gap:10px;align-items:start}
.legend-row span{width:12px;height:12px;border-radius:3px;margin-top:6px}
.legend-row p{margin:0;color:var(--muted);font-weight:750}
.legend-row strong{display:block;color:var(--navy);font-size:16px}
.tool-copy,.related-tools{padding-top:28px}
.sidebar{display:grid;gap:18px;position:sticky;top:96px}
.page-section{padding:74px 0}
.page-section .content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:34px;max-width:880px}
.site-footer{background:var(--navy);color:#d9e6e4;padding:58px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr 1fr;gap:28px}
.footer-brand{display:inline-block;color:#fff;font-size:22px;font-weight:900;margin-bottom:12px}
.site-footer h2{font-size:16px;color:#fff;margin-bottom:14px}
.site-footer p{color:#bfd0cd}
.site-footer a{color:#d9e6e4}
.footer-bottom{display:flex;justify-content:space-between;gap:18px;border-top:1px solid rgba(255,255,255,.14);margin-top:34px;padding-top:18px;font-size:14px}
.footer-bottom p{margin:0}
@media (max-width:1050px){.nav-toggle{display:block}.nav-menu{position:absolute;left:16px;right:16px;top:76px;display:none;flex-direction:column;align-items:flex-start;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:5px;padding:18px}.nav-menu.open{display:flex}.tools-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.page-grid,.content-grid{grid-template-columns:1fr}.sidebar{position:static}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:760px){.container{width:min(100% - 24px,var(--container))}.navbar{height:68px}.hero{padding:72px 0 62px}.filter-panel{grid-template-columns:1fr}.tabs{justify-content:flex-start;overflow-x:auto;padding-bottom:6px}.tab{white-space:nowrap}.tools-grid,.tools-grid.compact{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.tool-card{min-height:270px;padding:16px}.tool-card h3{font-size:17px}.tool-card p:last-child{font-size:14px}.benefit-grid,.article-grid,.form-grid,.result-details,.chart-panel,.result-summary{grid-template-columns:1fr}.summary-chart{justify-self:start;max-width:100%;grid-template-columns:90px minmax(0,1fr)}.summary-donut{width:90px}.summary-donut::after{inset:20px}.chart-visual{width:150px;margin-inline:auto}.tool-hero-grid{grid-template-columns:1fr}.tool-hero-icon{width:76px;height:76px}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column}.brand-text{font-size:16px}.calculator-panel{padding:20px}}
@media (max-width:380px){h1{font-size:30px}.hero-subtitle{font-size:18px}.tool-card{padding:14px}.tool-icon{width:48px;height:48px}.tool-open{font-size:14px}}