:root{--bg:#f6f8fb;--surface:#fff;--surface-2:#eef4f8;--text:#102033;--muted:#607086;--line:#dce4ec;--brand:#075985;--brand-dark:#083344;--brand-2:#0ea5e9;--good:#087a4b;--warn:#a94f08;--bad:#b93832;--shadow:0 14px 42px rgba(15,23,42,.09);--radius:18px;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.62;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid rgba(14,165,233,.35);outline-offset:2px}.container{width:min(var(--max),calc(100% - 32px));margin:auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.nav{height:68px;display:flex;align-items:center;gap:22px}.brand{display:flex!important;align-items:center;gap:10px;font-weight:850;letter-spacing:-.03em;color:inherit!important;padding:0!important}.brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;display:grid;place-items:center;font-weight:900}.nav-links{display:flex;gap:18px;margin-left:auto;color:var(--muted);font-size:.94rem}.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--brand)}.nav-cta{padding:10px 14px;border-radius:999px;background:var(--brand);color:#fff;font-weight:750}.menu-btn{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:10px;padding:8px 11px}.hero{padding:76px 0 58px;background:radial-gradient(circle at 82% 8%,rgba(14,165,233,.20),transparent 36%),linear-gradient(180deg,#fff,var(--bg))}.hero-grid{display:grid;grid-template-columns:1.22fr .78fr;gap:42px;align-items:center}.eyebrow{display:inline-flex;gap:8px;align-items:center;padding:7px 11px;border:1px solid #bae6fd;border-radius:999px;background:#f0f9ff;color:var(--brand);font-size:.78rem;font-weight:850;text-transform:uppercase;letter-spacing:.08em}.hero h1{font-size:clamp(2.65rem,6vw,5.55rem);line-height:.97;letter-spacing:-.067em;margin:18px 0}.hero p{font-size:1.12rem;color:var(--muted);max-width:720px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}.hero-proof{display:flex;gap:18px;flex-wrap:wrap;margin-top:24px;color:var(--muted);font-size:.86rem}.hero-proof strong{color:var(--text)}.btn{border:0;border-radius:12px;padding:12px 17px;cursor:pointer;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:8px}.btn-primary{background:var(--brand);color:#fff}.btn-primary:hover{background:#0c4a6e}.btn-secondary{background:#fff;border:1px solid var(--line);color:var(--text)}.btn-secondary:hover{border-color:#7c93aa}.trust-panel{background:#0f172a;color:#fff;border-radius:26px;padding:26px;box-shadow:var(--shadow)}.trust-panel h2{margin:0 0 14px;font-size:1.25rem}.trust-item{display:flex;gap:12px;padding:12px 0;border-top:1px solid rgba(255,255,255,.12)}.trust-item:first-of-type{border-top:0}.trust-icon{width:34px;height:34px;border-radius:9px;background:rgba(14,165,233,.18);display:grid;place-items:center;flex:0 0 auto}.section{padding:58px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}.section h2{font-size:clamp(1.75rem,4vw,3rem);letter-spacing:-.04em;margin:0}.section-sub{color:var(--muted);max-width:700px}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;display:flex;flex-direction:column;min-height:210px;transition:.18s ease;box-shadow:0 3px 14px rgba(15,23,42,.03)}.tool-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#7dd3fc}.tool-card[hidden]{display:none}.tool-card .category{font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;color:var(--brand);font-weight:850}.tool-card h3{font-size:1.15rem;line-height:1.25;margin:10px 0}.tool-card p{color:var(--muted);font-size:.93rem;margin:0 0 16px}.tool-card .open{margin-top:auto;color:var(--brand);font-weight:850}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.feature{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.feature strong{display:block;margin-bottom:5px}.feature span{color:var(--muted);font-size:.92rem}.cluster-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.cluster{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.cluster h3{margin:0 0 7px}.cluster p{margin:0;color:var(--muted);font-size:.9rem}.cluster a{color:var(--brand);font-weight:800;display:inline-block;margin-top:12px}.search-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px 14px;display:flex;gap:10px;box-shadow:var(--shadow);max-width:760px}.search-box input{width:100%;border:0;outline:0;font-size:1rem}.filter-row{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0 8px}.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:8px 12px;cursor:pointer;font-weight:700;color:var(--muted)}.chip.active{background:var(--brand);color:#fff;border-color:var(--brand)}.directory-meta{color:var(--muted);font-size:.9rem}.tool-hero{padding:44px 0 26px;background:linear-gradient(180deg,#fff,var(--bg))}.breadcrumbs{font-size:.86rem;color:var(--muted);margin-bottom:15px}.breadcrumbs a:hover{color:var(--brand)}.tool-hero h1{font-size:clamp(2.1rem,5vw,4rem);line-height:1.02;letter-spacing:-.055em;margin:0 0 14px}.tool-hero p{color:var(--muted);max-width:790px;font-size:1.05rem}.privacy-badge,.review-badge{display:inline-flex;gap:8px;align-items:center;margin-top:14px;border-radius:999px;padding:7px 11px;font-weight:800;font-size:.82rem}.privacy-badge{background:#ecfdf5;color:#047857;border:1px solid #a7f3d0}.review-badge{background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe;margin-left:8px}.calculator-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(330px,.75fr);gap:24px;align-items:start}.panel{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 8px 26px rgba(15,23,42,.05)}.panel h2,.panel h3{margin-top:0;letter-spacing:-.025em}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.field{display:flex;flex-direction:column;gap:6px}.field label{font-weight:800;font-size:.9rem}.field small{color:var(--muted);font-size:.78rem}.input-wrap{display:flex;align-items:center;border:1px solid var(--line);border-radius:12px;background:#fff;overflow:hidden}.input-wrap:focus-within{border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(14,165,233,.12)}.input-wrap span{padding-left:12px;color:var(--muted);font-size:.86rem}.input-wrap input,.input-wrap select{width:100%;border:0;outline:0;padding:12px;background:transparent;min-width:0}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:19px}.result-hero{padding:18px;border-radius:16px;background:linear-gradient(135deg,#082f49,#075985);color:#fff;margin-bottom:16px}.result-hero .label{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;opacity:.75}.result-hero .value{font-size:clamp(2rem,6vw,3.6rem);font-weight:900;line-height:1.05;letter-spacing:-.05em;margin-top:5px;overflow-wrap:anywhere}.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.metric{padding:13px;border:1px solid var(--line);border-radius:13px;background:var(--surface-2)}.metric .label{font-size:.74rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}.metric .value{font-weight:900;font-size:1.08rem;margin-top:4px;overflow-wrap:anywhere}.insight{margin-top:14px;padding:14px;border-radius:13px;background:#f0f9ff;border:1px solid #bae6fd;color:#0c4a6e}.warning{margin-top:14px;padding:14px;border-radius:13px;background:#fff7ed;border:1px solid #fed7aa;color:#9a3412}.audit-strip{margin-top:15px;padding:12px;border:1px solid var(--line);border-radius:13px;color:var(--muted);font-size:.82rem;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.audit-strip strong{color:var(--text);display:block}.chart{width:100%;height:220px;margin-top:15px}.chart:empty{display:none}.chart svg{width:100%;height:100%;display:block}.schedule-wrap{overflow:auto;max-height:460px;border:1px solid var(--line);border-radius:14px;margin-top:15px}table{width:100%;border-collapse:collapse;font-size:.88rem}th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:right;white-space:nowrap}th:first-child,td:first-child{text-align:left}th{position:sticky;top:0;background:#f8fafc;z-index:1}.scenario-table{margin-top:15px}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px}.article{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px}.article h1,.article h2,.article h3{letter-spacing:-.027em}.article h2{margin-top:34px}.article p,.article li{color:#334155}.article a{color:var(--brand);text-decoration:underline;text-underline-offset:3px}.formula-box{padding:16px;border-radius:14px;background:#0f172a;color:#e2e8f0;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;overflow:auto}.example-box,.source-box,.author-card{padding:18px;border-radius:16px;background:#f8fafc;border:1px solid var(--line);margin:16px 0}.example-box strong,.source-box strong{display:block;margin-bottom:7px}.source-box a{display:block;margin:6px 0}.check-list{padding-left:1.2rem}.check-list li{margin:8px 0}.toc{position:sticky;top:90px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.toc strong{display:block;margin-bottom:10px}.toc a{display:block;color:var(--muted);padding:5px 0}.faq-item{border-top:1px solid var(--line);padding:15px 0}.faq-item:first-child{border-top:0}.faq-item h3{margin-bottom:4px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.ad-slot{display:none;min-height:110px;border:1px dashed #cbd5e1;border-radius:14px;background:#f8fafc;align-items:center;justify-content:center;color:#94a3b8;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em}.ad-slot.is-enabled{display:flex}.site-footer{background:#0f172a;color:#cbd5e1;margin-top:54px;padding:46px 0 22px}.footer-grid{display:grid;grid-template-columns:1.55fr repeat(3,1fr);gap:28px}.site-footer h4{color:#fff;margin:0 0 10px}.site-footer a{display:block;color:#94a3b8;padding:4px 0}.site-footer a:hover{color:#fff}.footer-bottom{border-top:1px solid #243044;margin-top:28px;padding-top:18px;color:#64748b;font-size:.86rem;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.notice{padding:14px 16px;border-radius:14px;background:#fff;border:1px solid var(--line);color:var(--muted)}.builder-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.code-output{min-height:420px;width:100%;border:1px solid var(--line);border-radius:12px;padding:14px;font-family:ui-monospace,monospace;font-size:.82rem}.empty{padding:36px;text-align:center;color:var(--muted)}.contact-grid{display:grid;grid-template-columns:1fr .8fr;gap:24px}.contact-form{display:grid;gap:14px}.contact-form label{font-weight:800}.contact-form input,.contact-form select,.contact-form textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff}.contact-form textarea{min-height:150px;resize:vertical}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.stat{padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff}.stat strong{font-size:1.65rem;display:block}.stat span{color:var(--muted);font-size:.88rem}.below-fold{content-visibility:auto;contain-intrinsic-size:900px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1050px){.cluster-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:980px){.hero-grid,.calculator-layout,.content-grid,.contact-grid{grid-template-columns:1fr}.tool-grid{grid-template-columns:repeat(2,1fr)}.feature-grid,.stat-grid{grid-template-columns:repeat(2,1fr)}.toc{position:static}.footer-grid{grid-template-columns:1fr 1fr}.builder-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.nav-links{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;padding:14px 16px;border-bottom:1px solid var(--line);flex-direction:column}.nav-links.open{display:flex}.menu-btn{display:block}.nav-cta{display:none}.hero{padding-top:48px}.tool-grid,.feature-grid,.field-grid,.metric-grid,.cluster-grid,.stat-grid,.related-grid{grid-template-columns:1fr}.section{padding:42px 0}.container{width:min(100% - 22px,var(--max))}.panel,.article{padding:17px}.footer-grid{grid-template-columns:1fr}.hero h1{font-size:2.7rem}.tool-hero h1{font-size:2.35rem}.review-badge{margin-left:0}.audit-strip{grid-template-columns:1fr}.section-head{align-items:start;flex-direction:column}.actions .btn{flex:1 1 auto}}
@media print{.site-header,.site-footer,.actions,.ad-slot,.toc,.related-tools{display:none!important}body{background:#fff}.panel,.article{box-shadow:none}.calculator-layout,.content-grid{display:block}.container{width:100%}.section{padding:18px 0}}