:root{--bg:#f6f7fb;--surface:#fff;--surface-2:#f0f2f7;--text:#16181d;--muted:#68707e;--border:#e2e6ee;--accent:#6357e8;--accent-strong:#5144d2;--accent-soft:rgba(99,87,232,.10);--shadow:0 16px 45px rgba(24,28,39,.08);--header-bg:rgba(255,255,255,.82);--success:#24a36b;--radius:22px;--max:1120px}
html[data-theme="dark"]{--bg:#0b0d12;--surface:#13161d;--surface-2:#1a1e27;--text:#f4f6fa;--muted:#a8afbd;--border:#292e39;--accent:#867cff;--accent-strong:#9a92ff;--accent-soft:rgba(134,124,255,.13);--shadow:0 20px 55px rgba(0,0,0,.35);--header-bg:rgba(11,13,18,.78)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:400 16px/1.65 Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.narrow{width:min(800px,calc(100% - 40px));margin-inline:auto}.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.site-header{position:sticky;top:0;z-index:100;background:var(--header-bg);border-bottom:1px solid var(--border);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px)}.header-inner{width:min(var(--max),calc(100% - 40px));min-height:72px;margin:auto;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;gap:10px;font-weight:850;letter-spacing:-.03em;font-size:1.12rem}.brand-mark{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;color:#fff;background:linear-gradient(135deg,var(--accent),#8b7fff);box-shadow:0 8px 22px rgba(99,87,232,.28);font-weight:900}.brand-word{font-size:1.2rem}.site-nav{display:flex;align-items:center;gap:6px;margin-left:auto}.site-nav a{padding:9px 12px;border-radius:10px;color:var(--muted);font-weight:700;font-size:.94rem;transition:color .2s,background .2s,transform .2s}.site-nav a:hover,.site-nav a[aria-current="page"]{color:var(--text);background:var(--accent-soft)}.site-nav a:hover{transform:translateY(-1px)}.header-actions{display:flex;align-items:center;gap:8px}.theme-toggle,.menu-toggle{border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;transition:transform .2s,border-color .2s,background .2s}.theme-toggle{display:inline-flex;align-items:center;gap:8px;padding:9px 12px;border-radius:11px;font-weight:750;font-size:.88rem}.theme-toggle:hover,.menu-toggle:hover{transform:translateY(-1px);border-color:var(--accent)}.theme-icon{font-size:1rem;line-height:1}.menu-toggle{display:none;width:42px;height:42px;border-radius:11px;padding:9px}.menu-toggle span{display:block;width:20px;height:2px;margin:4px auto;background:currentColor;border-radius:4px}
.hero{position:relative;isolation:isolate}.hero-home{overflow:hidden;padding:92px 0 74px;border-bottom:1px solid var(--border)}.hero-inner{text-align:center;position:relative;z-index:2}.hero-orb{position:absolute;border-radius:999px;filter:blur(55px);opacity:.55;pointer-events:none}.orb-one{width:260px;height:260px;top:80px;left:-80px;background:rgba(99,87,232,.15);animation:float 8s ease-in-out infinite}.orb-two{width:220px;height:220px;right:-60px;bottom:10px;background:rgba(60,190,180,.10);animation:float 10s ease-in-out infinite reverse}.eyebrow-pill{display:inline-flex;align-items:center;gap:8px;padding:7px 11px;border:1px solid var(--border);background:var(--surface);box-shadow:0 8px 22px rgba(24,28,39,.05);border-radius:999px;color:var(--accent);font-size:.72rem;letter-spacing:.13em;font-weight:850}.pulse-dot{width:7px;height:7px;border-radius:99px;background:var(--success);box-shadow:0 0 0 6px rgba(36,163,107,.10)}h1,h2,h3{margin:0;line-height:1.12;letter-spacing:-.04em}h1{font-size:clamp(2.6rem,7vw,5.3rem);max-width:920px;margin:20px auto}.page-hero h1{font-size:clamp(2.4rem,6vw,4.5rem)}h2{font-size:clamp(1.85rem,4vw,2.9rem)}h3{font-size:1.15rem}.hero-copy{max-width:700px;margin:0 auto;color:var(--muted);font-size:1.08rem}.hero-actions{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;margin:28px 0}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:46px;padding:0 17px;border-radius:13px;border:1px solid var(--border);font-weight:800;transition:transform .2s,box-shadow .2s,border-color .2s,background .2s}.button span{transition:transform .2s}.button:hover{transform:translateY(-2px)}.button:hover span{transform:translateX(3px)}.button-primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 12px 28px rgba(99,87,232,.24)}.button-primary:hover{background:var(--accent-strong)}.button-secondary{background:var(--surface)}.search-wrap{width:min(700px,100%);margin:8px auto 0;position:relative}.search-wrap input{width:100%;height:60px;border:1px solid var(--border);border-radius:17px;background:var(--surface);color:var(--text);padding:0 75px 0 50px;outline:none;box-shadow:var(--shadow);transition:border-color .2s,box-shadow .2s}.search-wrap input:focus{border-color:var(--accent);box-shadow:0 0 0 5px var(--accent-soft),var(--shadow)}.search-icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);font-size:1.35rem;color:var(--muted)}.search-wrap kbd{position:absolute;right:14px;top:50%;transform:translateY(-50%);padding:4px 7px;border:1px solid var(--border);border-bottom-width:2px;border-radius:7px;color:var(--muted);background:var(--surface-2);font-size:.72rem}.search-hint{margin:10px 0 0;color:var(--muted);font-size:.8rem}
.section{padding:78px 0}.section-soft{background:var(--surface-2);border-block:1px solid var(--border)}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:25px}.eyebrow{margin:0 0 8px;color:var(--accent);font-size:.72rem;letter-spacing:.15em;font-weight:900}.text-link,.inline-link{color:var(--accent);font-weight:800}.text-link{display:inline-flex;align-items:center;gap:7px}.text-link span{transition:transform .2s}.text-link:hover span{transform:translateX(4px)}.category-grid,.calculator-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.category-card{position:relative;display:flex;flex-direction:column;padding:23px;border:1px solid var(--border);border-radius:19px;background:var(--surface);box-shadow:0 10px 30px rgba(24,28,39,.04);transition:transform .22s,border-color .22s,box-shadow .22s}.category-card:hover{transform:translateY(-5px);border-color:rgba(99,87,232,.55);box-shadow:var(--shadow)}.card-icon{display:grid;place-items:center;width:40px;height:40px;border-radius:12px;background:var(--accent-soft);color:var(--accent);font-size:1.3rem;font-weight:900}.card-title-row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:16px 0 7px}.card-title-row span{color:var(--muted);transition:transform .2s}.category-card:hover .card-title-row span{transform:translate(2px,-2px);color:var(--accent)}.category-card p{margin:0;color:var(--muted);font-size:.92rem}.card-status{margin-top:18px;color:var(--accent);font-size:.76rem;font-weight:850;letter-spacing:.08em;text-transform:uppercase}.empty-state{text-align:center;margin:18px 0 0;color:var(--muted)}.split-section{display:grid;grid-template-columns:1.15fr .85fr;gap:70px;align-items:start}.body-copy{max-width:650px;color:var(--muted);font-size:1.02rem;margin:18px 0 20px}.feature-list{display:grid;gap:12px}.feature-item{display:flex;gap:16px;padding:18px;border:1px solid var(--border);border-radius:16px;background:var(--surface)}.feature-item>span,.value-grid span{color:var(--accent);font-size:.76rem;font-weight:900;letter-spacing:.12em}.feature-item strong{display:block;margin-bottom:3px}.feature-item p{margin:0;color:var(--muted);font-size:.92rem}
.page-hero{padding:82px 0 58px;border-bottom:1px solid var(--border);text-align:center;background:radial-gradient(circle at 50% 0,var(--accent-soft),transparent 45%)}.content-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}.content-card h2{font-size:1.7rem;margin:30px 0 10px}.content-card h2:first-child{margin-top:0}.content-card p{color:var(--muted)}.value-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:22px}.value-grid>div{padding:18px;border-radius:15px;background:var(--surface-2);border:1px solid var(--border)}.value-grid h3{margin:8px 0}.value-grid p{margin:0;font-size:.9rem}.callout{margin-top:24px;padding:18px;border:1px solid rgba(99,87,232,.25);border-radius:16px;background:var(--accent-soft)}.callout p{margin:4px 0 8px}.contact-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}.email-card{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px 16px;border:1px solid var(--border);border-radius:13px;background:var(--surface-2);margin-top:10px}.email-card span{color:var(--muted);font-size:.8rem;font-weight:750}.email-card a{color:var(--accent);font-weight:800;overflow-wrap:anywhere}.faq-list{display:grid;gap:10px}.faq-list details{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:0 18px;transition:border-color .2s}.faq-list details[open]{border-color:rgba(99,87,232,.45)}.faq-list summary{cursor:pointer;list-style:none;padding:19px 0;font-weight:800}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary::after{content:"+";float:right;color:var(--accent);font-size:1.25rem}.faq-list details[open] summary::after{content:"−"}.faq-list p{margin:0 0 18px;color:var(--muted)}.sitemap-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.sitemap-group{padding:24px;border:1px solid var(--border);border-radius:18px;background:var(--surface)}.sitemap-group h2{font-size:1.4rem;margin-bottom:14px}.sitemap-group a{display:block;padding:10px 0;border-top:1px solid var(--border);color:var(--muted);font-weight:700}.sitemap-group a:hover{color:var(--accent)}
.category-hero{padding:70px 0;border-bottom:1px solid var(--border);background:radial-gradient(circle at 8% 0,var(--accent-soft),transparent 35%)}.category-hero-inner{display:flex;align-items:center;gap:24px}.category-symbol{width:74px;height:74px;flex:none;display:grid;place-items:center;border-radius:20px;background:var(--accent-soft);color:var(--accent);font-size:2rem;font-weight:900}.category-hero h1{font-size:clamp(2.2rem,5vw,4rem);margin:10px 0 8px;text-align:left}.category-hero p{margin:0;color:var(--muted);max-width:680px}.empty-category{text-align:center;padding:62px 28px}.empty-category .card-icon{margin:0 auto 15px}.empty-category h2{font-size:2rem;margin-bottom:10px}.empty-category .button{margin-top:14px}.calculator-grid{grid-template-columns:repeat(3,1fr)}.error-page{padding:110px 0}.error-number{font-size:clamp(5rem,16vw,10rem);font-weight:900;line-height:.9;color:transparent;background:linear-gradient(135deg,var(--accent),#8b7fff);-webkit-background-clip:text;background-clip:text;margin-bottom:18px}
.site-footer{margin-top:30px;border-top:1px solid var(--border);background:var(--surface)}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding:42px 0 32px}.footer-brand{margin-bottom:12px}.footer-grid>div>p{color:var(--muted);max-width:280px;margin:0}.footer-grid>div>strong{display:block;margin-bottom:12px;font-size:.9rem}.footer-grid>div>a:not(.brand){display:block;color:var(--muted);font-size:.9rem;margin:7px 0}.footer-grid>div>a:not(.brand):hover{color:var(--accent)}.footer-bottom{display:flex;justify-content:space-between;gap:15px;padding:17px 0 24px;border-top:1px solid var(--border);font-size:.82rem;color:var(--muted)}
@keyframes rise{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes float{0%,100%{transform:translate3d(0,0,0)}50%{transform:translate3d(0,-14px,0)}}.hero-inner>*{animation:rise .65s both}.hero-inner>*:nth-child(2){animation-delay:.06s}.hero-inner>*:nth-child(3){animation-delay:.12s}.hero-inner>*:nth-child(4){animation-delay:.18s}.hero-inner>*:nth-child(5){animation-delay:.24s}.category-card{animation:rise .6s both}.category-card:nth-child(2){animation-delay:.04s}.category-card:nth-child(3){animation-delay:.08s}.category-card:nth-child(4){animation-delay:.12s}.category-card:nth-child(5){animation-delay:.16s}
@media(max-width:900px){.category-grid{grid-template-columns:repeat(2,1fr)}.split-section{grid-template-columns:1fr;gap:35px}.calculator-grid{grid-template-columns:repeat(2,1fr)}.contact-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1.6fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2}}
@media(max-width:720px){.container,.header-inner{width:min(100% - 28px,var(--max))}.narrow{width:min(100% - 28px,800px)}.header-inner{min-height:64px}.site-nav{display:none;position:absolute;left:14px;right:14px;top:70px;padding:10px;background:var(--surface);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.site-nav a{padding:13px 14px}.theme-label{display:none}.theme-toggle{padding:10px 11px}.menu-toggle{display:block}.hero-home{padding:70px 0 54px}.page-hero{padding:65px 0 48px}.category-hero{padding:52px 0}.category-hero-inner{align-items:flex-start}.section{padding:60px 0}.section-heading{align-items:flex-start}.section-heading .text-link{display:none}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{flex-direction:column}}
@media(max-width:560px){h1{font-size:2.45rem}.hero-copy{font-size:1rem}.hero-actions{margin-top:22px}.button{width:100%}.search-wrap input{height:54px}.search-wrap kbd{display:none}.category-grid,.calculator-grid,.value-grid,.sitemap-grid{grid-template-columns:1fr}.category-card{padding:20px}.content-card{padding:24px}.category-hero-inner{gap:15px}.category-symbol{width:58px;height:58px;border-radius:16px;font-size:1.55rem}.category-hero h1{text-align:left;font-size:2.15rem}.category-hero p{font-size:.94rem}.email-card{align-items:flex-start;flex-direction:column;gap:5px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.hero-inner>*,.category-card,.orb-one,.orb-two{animation:none!important}.button,.category-card,.site-nav a,.theme-toggle,.menu-toggle{transition:none!important}}
/* CALCULATOR UI SYSTEM */
.calculator-page{padding-bottom:20px}.calculator-hero{padding:58px 0 34px}.calculator-breadcrumb{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:.84rem;margin-bottom:18px}.calculator-breadcrumb a:hover{color:var(--accent)}.calculator-kicker{display:inline-flex;align-items:center;gap:8px;color:var(--accent);font-weight:850;letter-spacing:.12em;font-size:.72rem;text-transform:uppercase}.calculator-title{font-size:clamp(2.15rem,5vw,3.7rem);margin:10px 0}.calculator-subtitle{max-width:720px;color:var(--muted);font-size:1rem;margin:0}
.calculator-layout{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(320px,.75fr);gap:18px;align-items:start}.calculator-panel{background:var(--surface);border:1px solid var(--border);border-radius:24px;box-shadow:var(--shadow);overflow:hidden}.calculator-panel-head{padding:22px 24px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:16px}.calculator-panel-head h2{font-size:1.15rem;letter-spacing:-.02em}.panel-caption{color:var(--muted);font-size:.82rem}.calculator-form{padding:24px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.field{min-width:0}.field.full{grid-column:1/-1}.field label{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:0 0 8px;font-size:.86rem;font-weight:800}.field label .field-hint{color:var(--muted);font-size:.75rem;font-weight:600}.input-wrap{position:relative}.input-wrap input,.input-wrap select{width:100%;min-height:50px;border:1px solid var(--border);border-radius:13px;background:var(--surface);color:var(--text);padding:0 48px 0 14px;outline:none;transition:border-color .2s,box-shadow .2s,background .2s}.input-wrap select{padding-right:40px;appearance:none}.input-wrap input:focus,.input-wrap select:focus{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-soft)}.input-prefix,.input-suffix{position:absolute;top:50%;transform:translateY(-50%);color:var(--muted);font-size:.84rem;font-weight:750;pointer-events:none}.input-prefix{left:14px}.input-suffix{right:14px}.input-prefix + input{padding-left:35px}.select-arrow{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--muted);pointer-events:none}.field-help{margin:7px 0 0;color:var(--muted);font-size:.78rem}.field[data-state="error"] input,.field[data-state="error"] select{border-color:#d84d68;box-shadow:0 0 0 4px rgba(216,77,104,.10)}.field[data-state="success"] input,.field[data-state="success"] select{border-color:var(--success);box-shadow:0 0 0 4px rgba(36,163,107,.09)}.field-message{display:none;margin:7px 0 0;font-size:.78rem;font-weight:700}.field[data-state="error"] .field-message.error{display:block;color:#c73e59}.field[data-state="success"] .field-message.success{display:block;color:var(--success)}
.segmented{display:grid;grid-template-columns:repeat(2,1fr);gap:6px;padding:5px;border:1px solid var(--border);border-radius:13px;background:var(--surface-2)}.segmented button{min-height:40px;border:0;border-radius:9px;background:transparent;color:var(--muted);font-weight:800;cursor:pointer;transition:background .2s,color .2s,transform .2s}.segmented button[aria-pressed="true"]{background:var(--surface);color:var(--text);box-shadow:0 4px 12px rgba(24,28,39,.07)}.segmented button:hover{transform:translateY(-1px);color:var(--text)}.form-actions{display:flex;align-items:center;gap:10px;margin-top:20px}.form-actions .button{flex:1}.button-ghost{background:transparent;color:var(--muted)}.button-ghost:hover{color:var(--text);background:var(--surface-2)}
.result-panel{position:sticky;top:92px}.result-card{margin:22px;background:linear-gradient(145deg,var(--accent-soft),var(--surface));border:1px solid rgba(99,87,232,.18);border-radius:20px;padding:24px}.result-label{color:var(--muted);font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.result-value{font-size:clamp(2.35rem,6vw,4.1rem);line-height:1;font-weight:900;letter-spacing:-.055em;margin:10px 0 12px}.result-subtitle{color:var(--muted);font-size:.88rem;margin:0}.result-divider{height:1px;background:var(--border);margin:20px 0}.result-rows{display:grid;gap:9px}.result-row{display:flex;justify-content:space-between;gap:16px;font-size:.88rem}.result-row span:first-child{color:var(--muted)}.result-row strong{font-weight:850}.result-actions{display:flex;gap:8px;margin-top:18px}.result-actions .button{flex:1}.calculator-note{display:flex;gap:10px;align-items:flex-start;margin:16px 22px 22px;padding:13px 14px;border-radius:13px;background:var(--surface-2);color:var(--muted);font-size:.78rem}.calculator-note strong{color:var(--text)}
.calculator-content{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:18px}.info-card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:24px}.info-card h2{font-size:1.35rem;margin-bottom:9px}.info-card p{color:var(--muted);margin:0}.formula-box{margin-top:15px;padding:15px;border:1px dashed rgba(99,87,232,.35);border-radius:14px;background:var(--accent-soft);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.86rem;overflow:auto}.steps{display:grid;gap:10px;margin-top:15px}.step{display:grid;grid-template-columns:30px 1fr;gap:10px;align-items:start}.step-number{width:28px;height:28px;border-radius:9px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);font-size:.75rem;font-weight:900}.step p{margin:2px 0 0;color:var(--muted);font-size:.88rem}.related-tools{margin-top:18px}.related-tools h2{font-size:1.25rem;margin-bottom:13px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.related-link{display:block;padding:15px;border:1px solid var(--border);border-radius:14px;background:var(--surface);font-weight:800;transition:transform .2s,border-color .2s}.related-link:hover{transform:translateY(-2px);border-color:rgba(99,87,232,.45)}.related-link small{display:block;color:var(--muted);font-weight:500;margin-top:3px}.calculator-status{display:inline-flex;align-items:center;gap:7px;padding:7px 10px;border-radius:999px;background:var(--surface-2);color:var(--muted);font-size:.72rem;font-weight:800}.calculator-status .status-dot{width:6px;height:6px;border-radius:50%;background:var(--success)}
@media(max-width:900px){.calculator-layout{grid-template-columns:1fr}.result-panel{position:static}.calculator-content{grid-template-columns:1fr}}@media(max-width:560px){.calculator-hero{padding:42px 0 25px}.calculator-title{font-size:2.3rem}.calculator-panel-head{padding:18px}.calculator-form{padding:18px}.form-grid{grid-template-columns:1fr}.field.full{grid-column:auto}.form-actions{position:sticky;bottom:10px;z-index:20;padding:8px;border:1px solid var(--border);border-radius:14px;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:blur(12px)}.result-card{margin:16px;padding:20px}.result-value{font-size:3rem}.calculator-note{margin:14px 16px 16px}.calculator-content{gap:12px}.info-card{padding:20px}.related-grid{grid-template-columns:1fr 1fr}}

.language-toggle{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:40px;padding:9px 11px;border:1px solid var(--border);border-radius:11px;background:var(--surface);color:var(--text);cursor:pointer;font-size:.84rem;font-weight:800;transition:transform .2s,border-color .2s,background .2s}.language-toggle:hover{transform:translateY(-1px);border-color:var(--accent)}.language-code{display:grid;place-items:center;min-width:24px;height:24px;border-radius:7px;background:var(--accent-soft);color:var(--accent);font-size:.72rem;font-weight:900}.language-label{white-space:nowrap}@media(max-width:720px){.language-label{display:none}.language-toggle{padding:8px 9px}}