:root{
  --bg:#f4f8fb;
  --surface:#ffffff;
  --surface-2:#f8fbfd;
  --surface-3:#eef5fb;
  --ink:#102538;
  --ink-soft:#365066;
  --muted:#60798e;
  --line:#d9e5ef;
  --brand:#0b315b;
  --brand-2:#123f71;
  --brand-3:#1b5e9a;
  --accent:#17c79a;
  --accent-2:#e9fffa;
  --warning:#f0b35a;
  --warning-soft:#fff7ea;
  --danger:#ab3642;
  --shadow:0 18px 42px rgba(10,39,66,.08);
  --shadow-soft:0 10px 24px rgba(10,39,66,.05);
  --radius:10px;
  --radius-sm:8px;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.58;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
button,input,select{font:inherit}
button{cursor:pointer}
.container{width:min(calc(100% - 36px),var(--max));margin:auto}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* Header */
.site-header{position:sticky;top:0;z-index:70;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid rgba(217,229,239,.95);box-shadow:0 10px 22px rgba(11,49,91,.04)}
.nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;min-width:240px}
.brand img{width:265px;max-width:100%;height:auto}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:var(--radius-sm);padding:9px 12px;color:var(--brand);font-weight:700}
.nav-links{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.nav-links a{color:var(--ink-soft);font-size:.93rem;font-weight:700;padding:10px 12px;border-radius:999px;transition:.18s ease}
.nav-links a:hover,.nav-links a[aria-current="page"]{background:var(--surface-3);color:var(--brand);text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:11px 16px;border-radius:var(--radius-sm);border:1px solid transparent;font-weight:800;transition:.18s ease;text-decoration:none}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.nav-cta{background:var(--brand);color:#fff;box-shadow:var(--shadow-soft)}
.nav-cta:hover{background:var(--brand-2)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--shadow-soft)}
.btn-primary:hover{background:var(--brand-2)}
.btn-secondary{background:#fff;color:var(--brand);border-color:var(--line)}
.btn-secondary:hover{background:var(--surface-2)}
.btn-ghost{background:var(--accent-2);color:var(--brand);border-color:#c9efe4}
.btn-ghost:hover{background:#dcfbf2}

/* Generic */
h1,h2,h3{line-height:1.12;letter-spacing:-.03em;margin-top:0}
h1{font-size:clamp(2.4rem,5vw,4.5rem);margin-bottom:18px;max-width:900px}
h2{font-size:clamp(1.7rem,3vw,2.3rem);margin-bottom:15px}
h3{font-size:1.08rem;margin-bottom:7px}
.eyebrow,.kicker{display:inline-flex;align-items:center;gap:8px;font-size:.78rem;text-transform:uppercase;letter-spacing:.1em;font-weight:900;color:var(--brand);margin-bottom:14px}
.eyebrow:before,.kicker:before{content:"";width:24px;height:2px;background:var(--accent)}
.lead{font-size:1.08rem;color:var(--ink-soft);max-width:760px;margin:0 0 26px}
.section{padding:66px 0}
.section-white{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;justify-content:space-between;gap:26px;align-items:end;margin-bottom:28px}
.section-head p{max-width:640px;color:var(--muted);margin:0}
.note{border:1px solid #f1dfbf;background:var(--warning-soft);padding:15px 16px;color:#6b5630;font-size:.9rem;border-radius:var(--radius-sm)}
.formula{background:var(--surface-3);border:1px solid var(--line);border-left:4px solid var(--brand);padding:14px 16px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.9rem;border-radius:var(--radius-sm)}
.ad-slot{display:none;border:1px dashed #c0d4e4;background:#fbfdff;text-align:center;padding:20px;color:#7d93a6;font-size:.78rem;border-radius:var(--radius-sm)}
.ads-enabled .ad-slot{display:block}

/* Home hero */
.hero{background:radial-gradient(circle at top right, rgba(23,199,154,.10), transparent 24%), linear-gradient(180deg,#ffffff 0%, #f7fbfe 100%);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(330px,.8fr);gap:44px;padding:72px 0 56px;align-items:center}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.hero-visual{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:24px;border-radius:18px;position:relative;overflow:hidden}
.hero-visual:after{content:"";position:absolute;inset:auto -70px -80px auto;width:190px;height:190px;background:radial-gradient(circle,rgba(23,199,154,.18),transparent 70%)}
.hero-brand{display:flex;align-items:center;gap:16px;margin-bottom:18px}
.hero-brand img{width:74px;height:74px;border-radius:18px;box-shadow:var(--shadow-soft)}
.hero-brand strong{font-size:1.05rem;color:var(--brand)}
.hero-brand span{display:block;color:var(--muted);font-size:.88rem}
.hero-kpis{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:18px 0}
.hero-kpi{background:var(--surface-2);border:1px solid var(--line);border-radius:14px;padding:14px 12px}
.hero-kpi strong{display:block;font-size:1.35rem;color:var(--brand);line-height:1.1}
.hero-kpi span{display:block;margin-top:4px;font-size:.78rem;color:var(--muted)}
.hero-list{display:grid;gap:12px;margin-top:8px}
.hero-point{display:grid;grid-template-columns:32px 1fr;gap:12px;align-items:start}
.hero-point .num{width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--accent-2);color:var(--brand);font-weight:900;font-size:.82rem;border:1px solid #d6f2eb}
.hero-point strong{display:block;font-size:.96rem}
.hero-point span{display:block;color:var(--muted);font-size:.9rem}
.metric-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;padding:24px 0;background:transparent}
.metric{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 18px;box-shadow:var(--shadow-soft)}
.metric strong{font-size:1.36rem;color:var(--brand);display:block;line-height:1.1}
.metric span{font-size:.84rem;color:var(--muted)}

/* Cards */
.calc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
.calc-card{background:#fff;border:1px solid var(--line);padding:22px;min-height:220px;display:flex;flex-direction:column;position:relative;border-radius:16px;box-shadow:var(--shadow-soft);transition:.18s ease}
.calc-card:hover{border-color:#bfd6e7;box-shadow:0 16px 28px rgba(11,49,91,.08);transform:translateY(-2px);text-decoration:none}
.calc-card .tag{font-size:.72rem;text-transform:uppercase;letter-spacing:.08em;color:var(--brand);font-weight:900;display:inline-flex;align-items:center;gap:6px}
.calc-card .tag:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
.calc-card h3{font-size:1.18rem;margin:13px 0 9px;color:var(--ink)}
.calc-card p{color:var(--muted);font-size:.93rem;margin:0 0 18px}
.calc-card a{margin-top:auto;font-weight:900}
.calc-card.featured{background:linear-gradient(180deg,#fff 0%,#fbfeff 100%);border-top:4px solid var(--accent)}
.cluster-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.cluster-card,.home-note,.popular-row,.task-card{background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow-soft)}
.task-card{padding:20px}
.task-card strong{display:block;font-size:1rem;margin-bottom:7px;color:var(--brand)}
.task-card p{margin:0;color:var(--muted);font-size:.9rem}
.popular-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.popular-row{padding:18px 18px;display:flex;justify-content:space-between;gap:15px;align-items:flex-start}
.popular-row strong{font-size:.94rem;color:var(--brand)}
.popular-row span{font-size:.84rem;color:var(--muted)}
.home-note{padding:22px}
.home-note strong{display:block;font-size:1.05rem;margin-bottom:6px;color:var(--brand)}
.home-note p{margin:0;color:var(--muted);font-size:.92rem}
.link-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.link-card{display:block;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 18px;box-shadow:var(--shadow-soft)}
.link-card:hover{text-decoration:none;border-color:#bfd6e7;transform:translateY(-1px)}
.link-card strong{display:block;color:var(--brand);margin-bottom:6px}
.link-card span{display:block;color:var(--muted);font-size:.9rem}

/* Page hero */
.page-hero{background:linear-gradient(180deg,#ffffff 0%,#f9fcfe 100%);border-bottom:1px solid var(--line);padding:38px 0 30px}
.breadcrumbs{font-size:.82rem;color:var(--muted);margin-bottom:18px}
.breadcrumbs a{color:var(--muted)}
.page-hero h1{font-size:clamp(2rem,4vw,3.2rem);margin-bottom:12px}
.page-hero .lead{margin-bottom:0}
.trust-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}
.trust-pill{border:1px solid var(--line);background:#fff;padding:6px 10px;font-size:.78rem;font-weight:800;color:var(--ink-soft);border-radius:999px}

/* Calculator shell */
.calculator-shell{display:grid;grid-template-columns:minmax(0,1fr) minmax(330px,.74fr);gap:20px;align-items:start}
.panel{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-soft);border-radius:18px;overflow:hidden}
.panel-head{padding:20px 22px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:15px;background:linear-gradient(180deg,#fff,#fbfdff)}
.panel-head h2{font-size:1.18rem;margin:0;color:var(--brand)}
.badge{font-size:.72rem;font-weight:900;color:var(--brand);background:var(--accent-2);padding:6px 9px;border-radius:999px;border:1px solid #d6f2eb}
.panel-body{padding:22px}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:15px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:.85rem;font-weight:800;color:var(--ink)}
.field small{font-size:.77rem;color:var(--muted)}
input,select{width:100%;border:1px solid #bfcfdd;border-radius:10px;background:#fff;color:var(--ink);padding:11px 12px;min-height:46px;outline:none}
input:focus,select:focus{border-color:var(--brand-3);box-shadow:0 0 0 3px rgba(11,49,91,.10)}
.range-line{display:grid;grid-template-columns:1fr 70px;gap:10px;align-items:center}
.calc-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:20px}
.result-panel{position:sticky;top:96px;background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow)}
.result-panel .panel-head{background:linear-gradient(180deg,#f9fcfe,#fff)}
.result-main{padding:24px 22px;border-bottom:1px solid var(--line)}
.result-main .label{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.result-main strong{display:block;font-size:clamp(2rem,4vw,3rem);line-height:1.08;margin:6px 0;color:var(--brand)}
.result-main .sub{font-size:.86rem;color:var(--muted)}
.result-list{padding:8px 22px 18px}
.result-row{display:flex;justify-content:space-between;gap:18px;padding:11px 0;border-bottom:1px solid #edf3f8;font-size:.91rem}
.result-row:last-child{border-bottom:0}
.result-row span{color:var(--muted)}
.result-row strong{text-align:right;color:var(--ink)}
.result-note{margin:0 22px 22px;background:var(--surface-3);border:1px solid var(--line);padding:11px 12px;font-size:.79rem;line-height:1.46;border-radius:12px;color:var(--ink-soft)}
.error{color:#fff;background:var(--danger);padding:10px 12px;font-size:.82rem;margin-top:12px;display:none;border-radius:10px}
.error.show{display:block}

/* Content */
.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:34px}
.prose{background:#fff;border:1px solid var(--line);padding:30px;border-radius:18px;box-shadow:var(--shadow-soft)}
.prose h2{font-size:1.56rem;margin-top:28px;color:var(--brand)}
.prose h2:first-child{margin-top:0}
.prose h3{margin-top:24px}
.prose p,.prose li{color:#40576a}
.prose table{width:100%;border-collapse:collapse;margin:18px 0;font-size:.9rem}
.prose th,.prose td{border:1px solid var(--line);padding:10px;text-align:left}
.prose th{background:#f1f7fb}
.sidebox{background:#fff;border:1px solid var(--line);padding:22px;position:sticky;top:96px;border-radius:18px;box-shadow:var(--shadow-soft)}
.sidebox h3{font-size:1rem;color:var(--brand)}
.sidebox p{font-size:.87rem;color:var(--muted);margin:0 0 10px}
.sidebox a{display:block;padding:10px 0;border-bottom:1px solid #edf3f8;font-size:.9rem;font-weight:700}
.sidebox a:last-child{border-bottom:0}
.faq{display:grid;gap:10px}
.faq details{background:#fff;border:1px solid var(--line);padding:0 17px;border-radius:14px;box-shadow:var(--shadow-soft)}
.faq summary{font-weight:800;padding:16px 0;cursor:pointer;color:var(--brand)}
.faq p{margin-top:0;color:#52687a}

/* Visualizer */
.viz-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-soft);border-radius:18px;overflow:hidden}
.viz-head{padding:18px 22px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px;align-items:center}
.viz-head h2{font-size:1.18rem;margin:0;color:var(--brand)}
.viz-wrap{padding:14px 18px 18px}
.viz-canvas{height:320px;border-radius:14px;background:linear-gradient(180deg,#f7fbfe,#eef6fc);border:1px solid var(--line);overflow:hidden}
.viz-caption{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.viz-chip{background:var(--surface-2);border:1px solid var(--line);padding:10px 12px;border-radius:12px}
.viz-chip strong{display:block;color:var(--brand);font-size:1rem}
.viz-chip span{display:block;color:var(--muted);font-size:.79rem;margin-top:3px}

/* Footer */
.footer{background:#0f2438;color:#d6e2ec;padding:52px 0 28px;margin-top:0}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer-brand{display:flex;gap:16px;align-items:flex-start}
.footer-brand img{width:54px;height:54px;border-radius:14px;box-shadow:var(--shadow-soft)}
.footer-brand strong{display:block;color:#fff;font-size:1rem;margin-bottom:6px}
.footer-brand p{color:#a8bdcf;font-size:.88rem;margin:0;max-width:420px}
.footer h3{color:#fff;font-size:.95rem;margin-bottom:12px}
.footer a{color:#d6e2ec;display:block;margin:7px 0;font-size:.88rem}
.footer a:hover{color:#fff}
.footer .muted-link{color:#a8bdcf}
.footer .small-note{font-size:.8rem;color:#9db2c3;line-height:1.5;margin-top:16px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:18px;margin-top:28px;font-size:.78rem;color:#95adbf;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer-bottom span{display:block}
.legal-page{max-width:850px}

@media(max-width:980px){
  .hero-grid,.calculator-shell,.content-grid{grid-template-columns:1fr}
  .hero-grid{gap:28px;padding:54px 0 42px}
  .calc-grid{grid-template-columns:repeat(2,1fr)}
  .cluster-grid,.link-list{grid-template-columns:repeat(2,1fr)}
  .result-panel,.sidebox{position:static}
  .footer-top{grid-template-columns:1fr 1fr}
  .nav-links{position:absolute;top:76px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);padding:16px 20px;display:none;flex-direction:column;align-items:flex-start;gap:8px}
  .nav-links.open{display:flex}
  .menu-btn{display:block}
  .nav-cta{display:none}
}
@media(max-width:720px){
  .hero-kpis,.metric-strip,.popular-list,.viz-caption{grid-template-columns:1fr}
  .calc-grid,.fields,.cluster-grid,.link-list{grid-template-columns:1fr}
  .section{padding:48px 0}
  .section-head{display:block}
  .section-head p{margin-top:8px}
  .panel-body,.prose,.hero-visual,.sidebox{padding:18px}
  .container{width:min(calc(100% - 22px),var(--max))}
  .brand img{width:220px}
  .nav{height:68px}
  .nav-links{top:68px}
  .hero-grid{padding:40px 0 32px}
  .page-hero{padding:28px 0 24px}
  .result-main strong{font-size:2.2rem}
  .footer-top{grid-template-columns:1fr}
  .footer-bottom{display:block}
}
.footer-bottom a{display:inline;margin:0;color:#d6e2ec}
.footer-bottom a:hover{color:#fff}
.tool-filter{display:flex;align-items:end;justify-content:space-between;gap:18px;margin:0 0 20px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px 16px;box-shadow:var(--shadow-soft)}
.tool-filter .field{flex:1;max-width:560px}.tool-filter input[type="search"]{background:var(--surface-2)}
.result-panel .panel-body{display:flex;gap:8px;flex-wrap:wrap}
@media(max-width:720px){.tool-filter{display:block}.tool-filter .badge{display:inline-flex;margin-top:10px}}