:root{--bg:#f6f8fb;--surface:#fff;--surface-2:#eef3f8;--text:#152235;--muted:#5d6b7a;--line:#d9e1ea;--primary:#1769e0;--primary-2:#0f55bd;--success:#14804a;--warning:#a86200;--danger:#b42318;--shadow:0 10px 30px rgba(20,40,70,.08);--radius:18px;--max:1180px}
[data-theme="dark"]{--bg:#0d141c;--surface:#141e28;--surface-2:#1b2936;--text:#eef5fb;--muted:#aebdca;--line:#2c3a47;--primary:#72a8ff;--primary-2:#9ac2ff;--success:#4bd18a;--warning:#ffc56b;--danger:#ff8b82;--shadow:0 12px 34px rgba(0,0,0,.24)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{width:min(calc(100% - 32px),var(--max));margin-inline:auto}.skip-link{position:absolute;left:-999px}.skip-link:focus{left:12px;top:12px;z-index:999;background:var(--surface);padding:10px;border-radius:8px}
.site-header{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--surface) 94%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav-wrap{min-height:72px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:800;white-space:nowrap}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:42px;height:34px;border-radius:10px;background:var(--primary);color:white;font-size:12px;letter-spacing:.04em}.primary-nav{margin-left:auto;display:flex;align-items:center;gap:5px}.primary-nav>a,.nav-group-btn,.theme-toggle{padding:10px 12px;border:0;background:transparent;color:var(--text);font:inherit;border-radius:10px;cursor:pointer}.primary-nav>a:hover,.nav-group-btn:hover,.theme-toggle:hover{background:var(--surface-2);text-decoration:none}.nav-group{position:relative}.nav-dropdown{display:none;position:absolute;right:0;top:48px;width:230px;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow)}.nav-group.open .nav-dropdown{display:grid}.nav-dropdown a{padding:10px 12px;border-radius:9px}.nav-dropdown a:hover{background:var(--surface-2);text-decoration:none}.menu-toggle{display:none;margin-left:auto;background:var(--surface-2);border:1px solid var(--line);padding:9px 12px;border-radius:10px;color:var(--text)}
.btn{display:inline-flex;justify-content:center;align-items:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:11px 16px;font-weight:750;cursor:pointer;text-decoration:none}.btn:hover{text-decoration:none}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-2)}.btn-secondary{background:var(--surface);border-color:var(--line);color:var(--text)}.btn-danger{background:transparent;border-color:var(--line);color:var(--danger)}
.hero{padding:78px 0 52px;background:linear-gradient(180deg,var(--surface),var(--bg))}.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:42px;align-items:center}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:12px;font-weight:800;color:var(--primary);margin:0 0 10px}.hero h1,.page-intro h1{font-size:clamp(2.25rem,5vw,4.1rem);line-height:1.04;letter-spacing:-.045em;margin:0 0 18px}.page-intro{padding:42px 0 28px}.page-intro h1{font-size:clamp(2.1rem,4vw,3.25rem)}.lead{font-size:1.12rem;color:var(--muted);max-width:780px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}.trust-row{display:flex;gap:10px;flex-wrap:wrap}.pill{background:var(--surface);border:1px solid var(--line);padding:8px 12px;border-radius:999px;font-size:14px}.hero-card{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow)}.hero-card .big{font-size:54px;font-weight:850;line-height:1;color:var(--primary)}.hero-card p{color:var(--muted)}
.section{padding:48px 0}.section.alt{background:var(--surface)}.section h2,.content-section h2{font-size:clamp(1.55rem,3vw,2.15rem);line-height:1.15;margin:0 0 12px}.section-intro{color:var(--muted);max-width:760px}.search-wrap{display:flex;gap:10px;margin:20px 0}.search-wrap input{flex:1}.input,.select{width:100%;border:1px solid var(--line);background:var(--surface);color:var(--text);border-radius:11px;padding:12px 13px;font:inherit;min-height:46px}.input:focus,.select:focus,button:focus-visible,a:focus-visible{outline:3px solid color-mix(in srgb,var(--primary) 35%,transparent);outline-offset:2px}.tool-filters{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 22px}.filter-btn{border:1px solid var(--line);background:var(--surface);color:var(--text);padding:9px 13px;border-radius:999px;cursor:pointer}.filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.tool-card,.related-card{display:flex;flex-direction:column;gap:7px;padding:21px;background:var(--surface);border:1px solid var(--line);border-radius:16px;box-shadow:0 5px 18px rgba(20,40,70,.04);color:var(--text)}.tool-card:hover,.related-card:hover{transform:translateY(-2px);box-shadow:var(--shadow);text-decoration:none}.tool-card small,.related-card span{color:var(--muted)}.category-label{font-size:12px;font-weight:800;color:var(--primary);text-transform:uppercase;letter-spacing:.08em}
.compare{width:100%;border-collapse:collapse;margin:18px 0}.compare th,.compare td{border-bottom:1px solid var(--line);padding:13px;text-align:left;vertical-align:top}.compare th{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.mini-card{padding:20px;background:var(--surface);border:1px solid var(--line);border-radius:16px}.mini-card h3{margin-top:0}.breadcrumb{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:14px;padding-top:18px}.breadcrumb a{color:var(--muted)}
.calculator-layout{display:grid;grid-template-columns:1fr .8fr;gap:20px;align-items:start;margin:18px auto 36px}.calculator-card,.result-card{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow)}.result-card{position:sticky;top:94px}.calculator-card h2,.result-card h2{margin-top:0}.unit-switch{display:flex;gap:5px;padding:4px;background:var(--surface-2);border-radius:12px;margin-bottom:18px}.unit-switch button{flex:1;border:0;background:transparent;color:var(--text);padding:9px;border-radius:9px;cursor:pointer}.unit-switch button.active{background:var(--surface);box-shadow:0 1px 4px rgba(0,0,0,.08);font-weight:750}.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.field label{display:block;font-weight:700;margin-bottom:6px}.field small{display:block;color:var(--muted);margin-top:4px}.full{grid-column:1/-1}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}.result-empty{color:var(--muted);padding:20px 0}.result-number{font-size:clamp(2.6rem,7vw,4.6rem);font-weight:900;line-height:1;margin:8px 0;color:var(--primary)}.result-label{font-weight:800}.result-detail{padding:12px 0;border-top:1px solid var(--line)}.result-detail strong{display:block}.error{margin-top:14px;padding:12px;border:1px solid color-mix(in srgb,var(--danger) 35%,var(--line));background:color-mix(in srgb,var(--danger) 8%,var(--surface));color:var(--danger);border-radius:10px}.notice{padding:17px 19px;border-left:4px solid var(--primary);background:var(--surface-2);border-radius:0 12px 12px 0;margin:22px 0}.notice p{margin:5px 0 0}.formula{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;background:var(--surface-2);border:1px solid var(--line);padding:16px;border-radius:12px;overflow:auto}.content-section{padding:30px 0}.content-section p{max-width:850px}.content-section li{margin:7px 0}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:24px}.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.faq-list details{border:1px solid var(--line);background:var(--surface);border-radius:12px;margin:9px 0}.faq-list summary{padding:15px 17px;cursor:pointer;font-weight:750}.faq-answer{padding:0 17px 15px;color:var(--muted)}.sources ul{padding-left:22px}
.gauge{height:16px;background:linear-gradient(90deg,#6ca0ff 0 25%,#63c689 25% 55%,#f2c15c 55% 75%,#e77979 75%);border-radius:99px;position:relative;margin:18px 0}.gauge-marker{position:absolute;top:-5px;width:4px;height:26px;background:var(--text);border-radius:3px;left:0;transition:left .2s}.category-badge{display:inline-flex;padding:6px 10px;border-radius:999px;background:var(--surface-2);font-weight:800}
.site-footer{margin-top:60px;background:#111a23;color:#d9e3ec;padding:42px 0 20px}.site-footer a{color:#d9e3ec;display:block;margin:6px 0}.site-footer p{color:#a9b7c4;max-width:340px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:30px}.footer-brand{color:#fff!important}.footer-bottom{border-top:1px solid #2a3743;margin-top:28px;padding-top:18px;display:flex;justify-content:space-between;gap:15px;color:#9cabb8;font-size:13px}
.ad-slot{border:1px dashed var(--line);background:var(--surface-2);color:var(--muted);padding:14px;text-align:center;border-radius:12px;margin:24px 0;font-size:13px}.hidden{display:none!important}
@media(max-width:900px){.hero-grid,.calculator-layout,.two-col{grid-template-columns:1fr}.result-card{position:static}.tool-grid{grid-template-columns:repeat(2,1fr)}.cards-3{grid-template-columns:1fr 1fr}.related-grid{grid-template-columns:1fr 1fr}.primary-nav{display:none}.menu-toggle{display:block}.primary-nav.open{position:absolute;left:16px;right:16px;top:72px;display:flex;flex-direction:column;align-items:stretch;background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:10px;box-shadow:var(--shadow)}.primary-nav.open .nav-group,.primary-nav.open .nav-group-btn,.primary-nav.open .nav-dropdown{width:100%}.primary-nav.open .nav-dropdown{position:static;box-shadow:none;border:0}.primary-nav.open .nav-cta{text-align:center;margin-top:5px}}
@media(max-width:600px){.container{width:min(calc(100% - 22px),var(--max))}.hero{padding:52px 0 34px}.tool-grid,.cards-3,.related-grid,.footer-grid{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.full{grid-column:auto}.footer-bottom{flex-direction:column}.calculator-card,.result-card{padding:18px}.page-intro{padding-top:28px}.hero h1{font-size:2.5rem}.compare{display:block;overflow-x:auto;white-space:nowrap}.nav-wrap{min-height:64px}.primary-nav.open{top:64px}}
@media print{.site-header,.site-footer,.hero-actions,.button-row,.ad-slot,.theme-toggle,.menu-toggle{display:none!important}body{background:#fff;color:#000}.calculator-card,.result-card{box-shadow:none;border:1px solid #bbb}.result-card{position:static}.content-section{padding:16px 0}a{color:#000;text-decoration:none}}