:root{
  --bg:#ffffff;
  --surface:#ffffff;
  --surface-soft:#f5f5f7;
  --surface-muted:#fafafc;
  --border:#e5e7eb;
  --border-strong:#d8dbe2;
  --text:#111111;
  --text-soft:#6b7280;
  --primary:#4f46e5;
  --primary-soft:rgba(79,70,229,.08);
  --radius:18px;
  --radius-lg:24px;
  --shadow:0 8px 24px rgba(17,24,39,.05);
  --shadow-hover:0 12px 32px rgba(17,24,39,.08);
  --container:min(1120px, calc(100vw - 28px));
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit}
.container{width:var(--container);margin:0 auto}
.section{padding:20px 0}
.section.spacious{padding:30px 0}
main{padding-bottom:78px}
@media (min-width:900px){main{padding-bottom:0}.section{padding:34px 0}}

.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(229,231,235,.9);
}
.header-inner{display:flex;align-items:center;gap:12px;min-height:64px}
.brand{font-size:18px;font-weight:800;letter-spacing:-.03em}
.brand span{color:var(--primary)}
.header-spacer{display:none}
.mobile-menu-btn{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--border);
  background:var(--surface);color:var(--text);display:grid;place-items:center;cursor:pointer;
}
.site-nav{
  position:fixed;left:14px;right:14px;top:72px;display:none;flex-direction:column;gap:8px;
  background:rgba(255,255,255,.98);border:1px solid var(--border);border-radius:20px;padding:12px;
  box-shadow:var(--shadow);
}
.site-header.nav-open .site-nav{display:flex}
.site-nav > a,.nav-parent-toggle{
  min-height:42px;padding:10px 12px;border-radius:14px;font-size:13px;font-weight:600;
  color:var(--text);background:transparent;border:0;text-align:left;width:100%;display:flex;align-items:center;justify-content:space-between;
}
.site-nav > a:hover,.nav-parent-toggle:hover,.site-nav > a.active{background:var(--surface-soft);color:var(--primary)}
.nav-dropdown{display:grid;gap:8px}
.nav-dropdown-menu{display:none;grid-template-columns:1fr;gap:8px;padding-top:2px}
.nav-dropdown.open .nav-dropdown-menu{display:grid}
.nav-caret{font-size:12px;color:var(--text-soft)}
.nav-section-link{
  padding:12px;border:1px solid var(--border);border-radius:16px;background:var(--surface-muted);
}
.nav-section-title{display:block;font-size:13px;font-weight:600;margin-bottom:4px}
.nav-section-desc{display:block;font-size:11px;line-height:1.5;color:var(--text-soft)}

.breadcrumb{padding:14px 0 0;font-size:11px;color:var(--text-soft)}
.breadcrumb a{color:var(--text-soft)}

.page-hero,.hero{padding:18px 0 4px}
.hero-shell,.page-hero .wrap,.search-box,.cat-card,.calc-card,.small-card,.panel,.faq,.article,.calculator-shell,.related,.result,.stat-item,.home-panel,.feature-chip{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);
}
.hero-shell,.page-hero .wrap{padding:22px}
.hero-card h1,.page-hero h1{margin:0 0 10px;font-size:22px;line-height:1.15;letter-spacing:-.04em}
.hero-card p,.page-hero p,.cat-card p,.calc-card p,.small-card p,.panel p,.article p,.article li,.home-note,.list-clean,.nav-section-desc{font-size:12px;line-height:1.7;color:var(--text-soft)}
.hero-kicker,.badge,.category-pill{
  display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:999px;
  background:var(--primary-soft);color:var(--primary);font-size:11px;font-weight:600;border:1px solid rgba(79,70,229,.10)
}
.hero-actions,.home-trust-row,.hero-metrics{display:none}
.home-hero-layout,.hero-grid,.page-grid,.section-grid,.grid-4,.grid-3,.related-grid,.results-grid,.feature-strip,.section-head{display:grid;gap:14px}
.home-hero-layout,.hero-grid,.page-grid,.section-grid{grid-template-columns:1fr}
.search-box{padding:16px}
.search-box p{margin:0 0 10px;font-size:12px;font-weight:600;color:var(--text)}
.search-input-row{display:flex;gap:10px;align-items:center}
.search-box input,.field input,.field select,.field textarea{
  width:100%;min-height:48px;padding:0 14px;border-radius:14px;border:1px solid var(--border-strong);background:#fff;color:var(--text);outline:none;
}
.search-box input:focus,.field input:focus,.field select:focus,.field textarea:focus{border-color:rgba(79,70,229,.5);box-shadow:0 0 0 4px rgba(79,70,229,.08)}
.btn,.search-btn,.hero-btn,.btn-link{
  min-height:44px;padding:0 14px;border-radius:14px;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:600;cursor:pointer;transition:.2s ease;
}
.btn,.search-btn,.hero-btn{background:var(--primary);color:#fff;box-shadow:none}
.btn:hover,.search-btn:hover,.hero-btn:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.btn.secondary,.hero-btn.secondary{background:#fff;color:var(--text);border-color:var(--border)}
.btn-link{padding:0;height:auto;min-height:auto;background:none;color:var(--primary)}
.search-suggestions{margin-top:10px;padding:8px;border:1px solid var(--border);border-radius:16px;background:#fff;display:grid;gap:6px}
.suggestion-item{padding:10px 12px;border-radius:12px;background:var(--surface-soft);font-size:12px}
.suggestion-item strong{display:block;font-size:13px}
.suggestion-item span{display:block;font-size:11px;color:var(--text-soft);margin-top:2px}
.popular-searches{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px;font-size:11px;color:var(--text-soft)}
.popular-searches button{border:1px solid var(--border);background:#fff;border-radius:999px;padding:7px 10px;font-size:11px;color:var(--text)}
.search-empty{margin-top:10px;padding:12px;border-radius:14px;border:1px dashed var(--border-strong);background:var(--surface-muted)}

.section-head{grid-template-columns:1fr;align-items:end;margin-bottom:14px}
.section-head h2,.calculator-shell h2,.panel h3,.faq h2,.article h2,.related h2,.home-panel h2{margin:0;font-size:18px;letter-spacing:-.03em}
.section-head p{margin:4px 0 0;font-size:12px;color:var(--text-soft)}
.stat-box,.feature-strip,.grid-4,.grid-3,.related-grid,.results-grid{display:grid;gap:12px}
.grid-4,.grid-3,.related-grid,.results-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.stat-box,.feature-strip{grid-template-columns:1fr}
.stat-item,.feature-chip,.result,.cat-card,.calc-card,.small-card{padding:16px}
.cat-card,.calc-card,.small-card{transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease}
.cat-card:hover,.calc-card:hover,.small-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.cat-icon,.tool-card-icon{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:var(--surface-soft);border:1px solid var(--border);font-size:16px
}
.calc-card h3,.cat-card h3,.small-card h4{margin:0;font-size:15px;line-height:1.45;letter-spacing:-.02em}
.calc-card .mini{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;padding-top:2px;font-size:11px;color:var(--text-soft)}
.calc-card .mini::after{content:'Open';color:var(--primary);font-weight:600}
.result .label,.stat-item span{font-size:11px;color:var(--text-soft)}
.result .value,.stat-item strong{display:block;margin-top:4px;font-size:18px;letter-spacing:-.03em}

.calculator-shell,.panel,.faq,.article,.related,.home-panel{padding:18px}
.form-grid{display:grid;grid-template-columns:1fr;gap:12px}
.field{display:grid;gap:7px;margin-bottom:12px}
.field label{font-size:12px;font-weight:600}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.status{margin-top:14px;padding:12px 14px;border-radius:14px;background:#f8fafc;border:1px solid var(--border);color:#334155;font-size:12px;font-weight:600}
.chart-box{margin-top:16px;padding:16px;border-radius:20px;background:#111827;color:#fff}
.chart-head{display:flex;justify-content:space-between;gap:10px;margin-bottom:7px;font-size:11px;color:rgba(255,255,255,.7)}
.chart-bg{height:10px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden}
.chart-fill{height:100%;border-radius:999px;background:#a5b4fc;width:0;transition:width .35s ease}
.formula{padding:14px;border-radius:14px;background:var(--primary-soft);border:1px solid rgba(79,70,229,.10);font-size:12px;font-weight:600;color:var(--primary)}
.list-clean, .article ul{padding-left:18px}
.faq details{border-top:1px solid var(--border);padding:12px 0}
.faq details:first-of-type{border-top:0;padding-top:0}
.faq summary{cursor:pointer;font-size:13px;font-weight:600;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details p{margin:8px 0 0;font-size:12px;color:var(--text-soft)}
.hidden{display:none !important}

.footer{padding:24px 0 96px;border-top:1px solid var(--border);background:#fff}
.compact-footer-links{display:flex;flex-wrap:wrap;gap:10px 14px;font-size:11px;color:var(--text-soft)}
.footer-bottom{margin-top:14px;font-size:11px;color:var(--text-soft)}

.mobile-bottom-nav{
  position:fixed;left:12px;right:12px;bottom:12px;z-index:60;display:grid;grid-template-columns:repeat(4,1fr);gap:8px;
  padding:8px;background:rgba(255,255,255,.94);border:1px solid var(--border);border-radius:18px;box-shadow:0 12px 30px rgba(17,24,39,.10);backdrop-filter:blur(10px)
}
.mobile-bottom-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-height:52px;border-radius:14px;font-size:11px;color:var(--text-soft)}
.mobile-bottom-nav a strong{font-size:14px;line-height:1}
.mobile-bottom-nav a.active{background:var(--surface-soft);color:var(--primary)}

.home-clean-grid{display:grid;gap:14px}
.home-card-list,.home-category-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.home-mini-card,.home-category-link{
  padding:14px;border:1px solid var(--border);border-radius:18px;background:#fff;box-shadow:var(--shadow);
}
.home-mini-card h3,.home-category-link h3{margin:8px 0 4px;font-size:15px;letter-spacing:-.02em}
.home-mini-card p,.home-category-link p{margin:0;font-size:12px;color:var(--text-soft);line-height:1.6}
.home-category-link .meta,.home-mini-card .meta{margin-top:10px;font-size:11px;color:var(--primary);font-weight:600}
.home-side-card{display:grid;gap:14px}
.home-side-list{display:grid;gap:10px}
.home-side-list a{display:flex;justify-content:space-between;gap:10px;padding:12px 14px;border:1px solid var(--border);border-radius:16px;background:#fff;font-size:12px}
.home-muted-block{padding:16px;border-radius:20px;background:var(--surface-soft);border:1px solid var(--border)}

@media (min-width:900px){
  .mobile-menu-btn{display:none}
  .header-spacer{display:block;flex:1}
  .header-inner{min-height:72px}
  .site-nav{position:static;display:flex !important;flex-direction:row;align-items:center;gap:6px;background:none;border:0;box-shadow:none;padding:0}
  .site-nav > a,.nav-parent-toggle{width:auto;min-height:40px;padding:0 12px;border-radius:999px;font-size:13px}
  .nav-dropdown{position:relative}
  .nav-dropdown-menu{position:absolute;top:46px;left:0;min-width:280px;padding:10px;background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow)}
  .nav-dropdown.open .nav-dropdown-menu{display:grid}
  .hero,.page-hero{padding:32px 0 8px}
  .hero-shell,.page-hero .wrap{padding:34px}
  .hero-card h1,.page-hero h1{font-size:44px}
  .section-head{grid-template-columns:1fr auto}
  .home-hero-layout,.hero-grid{grid-template-columns:minmax(0,1.25fr) minmax(300px,.75fr);align-items:start}
  .page-grid{grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr)}
  .section-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
  .grid-3,.related-grid,.results-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .stat-box,.feature-strip{grid-template-columns:repeat(4,minmax(0,1fr))}
  .form-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer{padding-bottom:28px}
  .mobile-bottom-nav{display:none}
}


.home-premium-panel{
  padding:18px;border:1px solid rgba(79,70,229,.14);border-radius:24px;
  background:linear-gradient(180deg,#ffffff 0%,#f5f3ff 100%);box-shadow:0 18px 45px rgba(79,70,229,.10)
}
.home-premium-top{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px}
.home-premium-top strong{font-size:13px;letter-spacing:-.02em}
.home-feature-strip{grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:14px}
.home-feature-strip .feature-chip{padding:14px;border-color:rgba(79,70,229,.10);background:rgba(255,255,255,.82)}
.home-feature-strip .feature-chip strong{display:block;font-size:16px}
.home-feature-strip .feature-chip span{display:block;margin-top:3px;font-size:11px;color:var(--text-soft)}
.home-image-spotlight{position:relative}
.home-featured-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.premium-tool-card,.premium-mini-card{
  border:1px solid rgba(79,70,229,.12);background:linear-gradient(180deg,#ffffff 0%,#faf5ff 100%);
  box-shadow:0 14px 32px rgba(17,24,39,.06);transition:transform .18s ease, box-shadow .18s ease, border-color .18s ease
}
.premium-tool-card{display:grid;gap:10px;padding:18px;border-radius:22px}
.premium-tool-card:hover,.premium-mini-card:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(79,70,229,.12)}
.premium-tool-card-large{grid-column:span 2;grid-template-columns:auto 1fr auto;align-items:end}
.premium-card-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:rgba(79,70,229,.10);border:1px solid rgba(79,70,229,.12);font-size:18px}
.premium-card-tag{display:inline-flex;padding:6px 10px;border-radius:999px;background:#ede9fe;color:var(--primary);font-size:11px;font-weight:700;margin-bottom:8px}
.premium-tool-card h3{margin:0;font-size:18px;line-height:1.35;letter-spacing:-.03em}
.premium-tool-card p{margin:0;font-size:12px;color:var(--text-soft);line-height:1.7}
.home-direct-tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.premium-hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px}
.premium-stat{padding:14px;border:1px solid rgba(79,70,229,.12);border-radius:18px;background:rgba(255,255,255,.76)}
.premium-stat strong{display:block;font-size:18px;letter-spacing:-.03em}
.premium-stat span{display:block;margin-top:4px;font-size:11px;color:var(--text-soft)}
.premium-category-grid .tool-card-link,.premium-tool-link{border-color:rgba(79,70,229,.10);background:linear-gradient(180deg,#ffffff 0%,#faf5ff 100%)}
.premium-category-grid .tool-card-link h3{margin:0 0 6px;font-size:18px;letter-spacing:-.03em}
.premium-category-grid .tool-card-link p{margin:0;color:var(--text-soft);font-size:12px;line-height:1.7}
.premium-category-grid .tool-card-link .meta{margin-top:12px;color:var(--primary);font-size:11px;font-weight:700}
@media (max-width:899px){
  .home-featured-grid,.home-direct-tool-grid{grid-template-columns:1fr}
  .premium-tool-card-large{grid-column:auto;grid-template-columns:1fr}
  .premium-hero-stats{grid-template-columns:1fr}
}
@media (min-width:900px){
  .home-direct-tool-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}


/* Performance optimizations */
.site-header{
  backdrop-filter:none;
}
.section + .section,
.compact-tool-section,
.site-footer,
.footer{
  content-visibility:auto;
  contain-intrinsic-size:1px 720px;
}
@media (min-width:900px){
  .site-header{backdrop-filter:blur(10px)}
}


/* Header/Footer stability polish */
.compact-footer-links{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center}
.compact-footer-bottom{padding-top:10px;word-break:break-word}
.site-footer{margin-top:32px}
@media (max-width: 768px){
  .site-footer{margin-top:24px}
  .compact-footer-links{gap:10px 14px;justify-content:center}
  .compact-footer-bottom{text-align:center}
}


/* Global header refresh applied site-wide */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:#f5f5f7;
  border-bottom:2px solid #d9dbe3;
  box-shadow:0 8px 26px rgba(15,23,42,.04);
}
.header-inner{
  display:flex;
  align-items:center;
  gap:18px;
  min-height:118px;
  padding:18px 0;
}
.brand.header-brand,
.brand{
  font-size:clamp(2rem,3.4vw,3.35rem);
  font-weight:900;
  letter-spacing:-.065em;
  line-height:1;
}
.brand span{color:#5a54ea}
.mobile-menu-btn{
  width:120px;
  height:120px;
  min-width:120px;
  border-radius:34px;
  border:2px solid #d7d8df;
  background:linear-gradient(180deg,#ffffff 0%,#fbfbfd 100%);
  box-shadow:0 8px 22px rgba(15,23,42,.04), inset 0 1px 0 rgba(255,255,255,.95);
  position:relative;
  font-size:0;
  color:transparent;
}
.mobile-menu-btn::before,
.mobile-menu-btn::after{
  content:"";
  position:absolute;
  left:50%;
  width:38px;
  height:4px;
  border-radius:999px;
  background:#101010;
  transform:translateX(-50%);
}
.mobile-menu-btn::before{top:40px; box-shadow:0 18px 0 #101010, 0 36px 0 #101010;}
.mobile-menu-btn::after{display:none;}
.site-nav{
  position:fixed;
  left:18px;
  right:18px;
  top:126px;
  display:none;
  flex-direction:column;
  gap:10px;
  background:rgba(255,255,255,.99);
  border:1px solid #e2e5ec;
  border-radius:26px;
  padding:14px;
  box-shadow:0 24px 44px rgba(15,23,42,.10);
}
.site-header.nav-open .site-nav{display:flex}
.breadcrumb{padding:18px 0 0}

@media (max-width: 640px){
  .header-inner{min-height:86px;padding:12px 0;gap:14px}
  .mobile-menu-btn{width:76px;height:76px;min-width:76px;border-radius:22px}
  .mobile-menu-btn::before{top:24px;width:26px;height:3px;box-shadow:0 12px 0 #101010, 0 24px 0 #101010}
  .brand.header-brand,.brand{font-size:clamp(1.65rem,7.5vw,2.35rem)}
  .site-nav{top:96px}
}

@media (min-width: 1200px){
  .mobile-menu-btn{display:none}
  .header-spacer{display:block;flex:1}
  .header-inner{min-height:92px;padding:14px 0;gap:16px}
  .brand.header-brand,.brand{font-size:3rem}
  .site-nav{
    position:static;
    display:flex !important;
    flex-direction:row;
    align-items:center;
    gap:6px;
    background:none;
    border:0;
    box-shadow:none;
    padding:0;
  }
  .site-nav > a,.nav-parent-toggle{width:auto;min-height:42px;padding:0 14px;border-radius:999px;font-size:13px}
  .nav-dropdown{position:relative}
  .nav-dropdown-menu{position:absolute;top:48px;left:0;min-width:280px;padding:10px;background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow)}
}