:root{
  --bg:#08111f;
  --surface:#0f172a;
  --surface-2:#13233f;
  --surface-3:#1e3358;
  --card:#ffffff;
  --card-soft:rgba(255,255,255,.82);
  --text:#102038;
  --text-soft:#4d617d;
  --text-inverse:#e9f3ff;
  --line:#d8e5f3;
  --line-strong:#c6d7ea;
  --brand:#0f766e;
  --brand-2:#0ea5e9;
  --brand-3:#7c3aed;
  --light:#f8fbff;
  --light-2:#f3f8ff;
  --success:#166534;
  --warning:#b45309;
  --radius:24px;
  --radius-sm:18px;
  --shadow:0 22px 60px rgba(17, 24, 39, .10);
  --shadow-hover:0 28px 80px rgba(15, 23, 42, .15);
}

*{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;
  color:var(--text);
  background:
    radial-gradient(circle at top left, rgba(14,165,233,.16), transparent 32%),
    radial-gradient(circle at top right, rgba(124,58,237,.11), transparent 28%),
    linear-gradient(180deg,#edf6ff 0%, #f8fbff 26%, #ffffff 100%);
  line-height:1.7;
  position:relative;
  min-height:100vh;
}
body::before,
body::after{
  content:"";
  position:fixed;
  inset:auto;
  z-index:-1;
  pointer-events:none;
  border-radius:999px;
  filter:blur(30px);
}
body::before{
  width:280px;
  height:280px;
  left:-80px;
  top:100px;
  background:rgba(14,165,233,.12);
}
body::after{
  width:240px;
  height:240px;
  right:-80px;
  top:260px;
  background:rgba(124,58,237,.08);
}

a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:none}
img{max-width:100%}
h1,h2,h3,h4{margin:0 0 .75rem;line-height:1.15;letter-spacing:-.02em}
p{margin:.25rem 0 1rem}
ul,ol{margin:.5rem 0 1rem}
.container{width:min(1160px, calc(100% - 32px));margin:0 auto}
.skip-link{position:absolute;left:-9999px;top:auto}
.skip-link:focus{left:12px;top:12px;background:#fff;padding:10px 14px;border-radius:12px;z-index:40;box-shadow:var(--shadow)}

.site-header{
  position:sticky;
  top:0;
  z-index:30;
  backdrop-filter:blur(16px);
  background:rgba(255,255,255,.75);
  border-bottom:1px solid rgba(15,23,42,.07);
  box-shadow:0 8px 30px rgba(15,23,42,.04);
}
.header-wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
.brand{display:flex;align-items:center;gap:14px;color:var(--text);text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{
  width:48px;
  height:48px;
  border-radius:16px;
  display:grid;
  place-items:center;
  color:#fff;
  font-weight:900;
  letter-spacing:.02em;
  background:linear-gradient(135deg,var(--brand),var(--brand-2) 55%, var(--brand-3));
  box-shadow:0 14px 30px rgba(14,165,233,.25);
}
.brand strong{display:block;font-size:1rem}
.brand small{display:block;color:var(--text-soft);font-size:.88rem;max-width:420px}
.main-nav{display:flex;gap:8px;align-items:center}
.main-nav a{
  padding:10px 14px;
  border-radius:999px;
  color:var(--text);
  text-decoration:none;
  font-weight:700;
  transition:.2s ease;
}
.main-nav a:hover,.main-nav a.active{
  background:#ffffff;
  box-shadow:0 10px 24px rgba(15,23,42,.06);
  color:var(--brand);
}
.menu-toggle{
  display:none;
  border:0;
  background:#eaf4ff;
  color:var(--text);
  padding:10px 14px;
  border-radius:999px;
  font-weight:800;
}

.hero{
  display:grid;
  grid-template-columns:1.35fr .85fr;
  gap:22px;
  padding:34px 0 14px;
  align-items:stretch;
}
.hero-copy,.hero-box,.mini-feature,.card,.calc-panel,.result-panel,.info-box,.prose,.page-head{
  background:linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(255,255,255,.92) 100%);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.hero-copy{
  padding:34px;
  background:
    radial-gradient(circle at top right, rgba(14,165,233,.12), transparent 32%),
    radial-gradient(circle at left center, rgba(124,58,237,.07), transparent 26%),
    linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(250,252,255,.96) 100%);
}
.hero-box{
  padding:28px;
  background:
    linear-gradient(180deg, rgba(10,23,43,.98) 0%, rgba(16,32,59,.96) 100%);
  color:var(--text-inverse);
  border-color:rgba(255,255,255,.07);
  position:relative;
  overflow:hidden;
}
.hero-box::after{
  content:"";
  position:absolute;
  inset:auto -40px -70px auto;
  width:180px;
  height:180px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(14,165,233,.35) 0%, rgba(14,165,233,0) 65%);
}
.hero h1{font-size:clamp(2.4rem,4.5vw,4.4rem);line-height:1.02;margin:.25rem 0 .9rem;max-width:11ch}
.lead{font-size:1.12rem;color:var(--text-soft);max-width:60ch}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  margin:0 0 .9rem;
  font-size:.78rem;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--brand);
  font-weight:900;
}
.eyebrow::before{
  content:"";
  width:10px;
  height:10px;
  border-radius:999px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 0 0 5px rgba(14,165,233,.12);
}
.hero-highlights,.quick-links,.meta-pills{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin:18px 0 4px;
}
.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border-radius:999px;
  background:#fff;
  border:1px solid #d7e8f7;
  box-shadow:0 10px 24px rgba(15,23,42,.05);
  font-weight:700;
  color:var(--text);
}
.pill strong{font-size:.95rem}
.tick-list{padding-left:1.1rem;margin-bottom:1.2rem}
.tick-list li{margin:.6rem 0;color:rgba(233,243,255,.92)}
.hero-box h2{color:#fff;font-size:1.35rem}
.hero-box .muted{color:rgba(233,243,255,.78)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 20px;
  border-radius:999px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2) 75%);
  color:#fff;
  font-weight:800;
  text-decoration:none;
  border:0;
  cursor:pointer;
  box-shadow:0 14px 32px rgba(14,165,233,.22);
  transition:transform .2s ease, box-shadow .2s ease, opacity .2s ease;
}
.button:hover{
  transform:translateY(-2px);
  opacity:1;
  text-decoration:none;
  box-shadow:0 22px 40px rgba(14,165,233,.28);
}
.button-secondary{
  background:#fff;
  color:var(--text);
  border:1px solid var(--line);
  box-shadow:0 10px 24px rgba(15,23,42,.06);
}

.section{padding:26px 0}
.section-heading{
  display:flex;
  justify-content:space-between;
  align-items:end;
  gap:16px;
  margin-bottom:16px;
}
.section-heading h2{font-size:clamp(1.6rem,2vw,2.2rem)}
.section-link{margin-top:16px}
.feature-strip,.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.mini-feature{
  padding:22px;
  position:relative;
  overflow:hidden;
}
.mini-feature::before{
  content:"";
  position:absolute;
  inset:0 auto auto 0;
  width:100%;
  height:4px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2),var(--brand-3));
}
.mini-feature h2{font-size:1.15rem;margin-bottom:.6rem}
.mini-feature p{margin-bottom:0;color:var(--text-soft)}

.stats-grid{margin-top:6px}
.stat-card{
  padding:22px;
  background:linear-gradient(180deg,#f9fcff 0%,#eff7ff 100%);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.stat-value{font-size:2rem;font-weight:900;line-height:1;margin-bottom:.35rem;color:var(--text)}
.stat-label{font-weight:800;margin-bottom:.4rem}
.stat-card p{margin:0;color:var(--text-soft)}

.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  overflow:hidden;
  transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover,.mini-feature:hover,.info-box:hover,.stat-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
  border-color:var(--line-strong);
}
.card-body{padding:22px}
.card-icon{
  padding:20px 22px 0;
  font-size:1.95rem
}
.card h3{margin:.12rem 0 .7rem;font-size:1.18rem;line-height:1.25}
.card h3 a{color:var(--text)}
.card h3 a:hover{color:var(--brand)}
.card p{margin:0 0 .65rem}
.card .eyebrow{margin-bottom:.65rem}
.muted{color:var(--text-soft)}

.prose{
  padding:30px;
  background:
    linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(247,251,255,.96) 100%);
}
.prose h2{margin-top:1.4rem;font-size:1.5rem}
.prose h3{margin-top:1.2rem}
.prose ul,.prose ol{padding-left:1.15rem}
.prose li{margin:.45rem 0}
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.info-box{padding:22px}
.info-box h3{font-size:1.12rem}
.page-head{
  padding:28px;
  margin-top:14px;
  background:
    radial-gradient(circle at top right, rgba(14,165,233,.12), transparent 35%),
    linear-gradient(180deg, rgba(255,255,255,.98) 0%, rgba(246,250,255,.96) 100%);
}
.page-head h1{font-size:clamp(2rem,3vw,3.2rem);line-height:1.05;margin:.2rem 0 .8rem}
.page-head p:last-child{margin-bottom:0;color:var(--text-soft);max-width:72ch}
.breadcrumb{display:flex;gap:10px;align-items:center;flex-wrap:wrap;padding-top:20px;color:var(--text-soft);font-size:.94rem}
.breadcrumb a{color:var(--text-soft)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb span{color:var(--text-soft)}

.filter-bar{margin-bottom:18px}
.filter-bar input{
  width:100%;
  padding:15px 18px;
  border-radius:16px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.94);
  font:inherit;
  transition:border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.filter-bar input:focus,
.field input:focus{
  outline:none;
  border-color:#8dd4fb;
  box-shadow:0 0 0 4px rgba(14,165,233,.14);
}
.calc-layout{display:grid;grid-template-columns:1fr .92fr;gap:18px;padding:10px 0 22px}
.calc-panel,.result-panel{padding:24px}
.calc-panel h2,.result-panel h2{font-size:1.35rem}
.calc-form{display:grid;gap:14px}
.field{display:grid;gap:7px}
.field span{font-weight:800;color:var(--text)}
.field input{
  width:100%;
  padding:14px 15px;
  border:1px solid var(--line);
  border-radius:14px;
  font:inherit;
  background:#fff;
}
.result-box{
  padding:22px;
  border-radius:18px;
  background:linear-gradient(180deg,#f0fbff 0%,#f8faff 100%);
  border:1px solid #cce7f6;
}
.result-value{
  font-size:1.75rem;
  font-weight:900;
  line-height:1.2;
  margin-bottom:8px;
}
.result-extra p{margin:.45rem 0}
.faq-list details{border-top:1px solid var(--line);padding:14px 0}
.faq-list details:last-child{border-bottom:1px solid var(--line)}
.faq-list summary{font-weight:800;cursor:pointer;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";float:right;color:var(--brand);font-size:1.2rem;line-height:1}
.faq-list details[open] summary::after{content:"−"}
.pager{display:flex;justify-content:space-between;gap:12px;margin-top:18px}
.pager a,.pager span{
  display:inline-flex;
  align-items:center;
  min-height:48px;
  padding:12px 14px;
  border-radius:16px;
  background:#fff;
  border:1px solid var(--line);
  box-shadow:0 10px 24px rgba(15,23,42,.05);
}

.site-footer{
  margin-top:46px;
  background:
    radial-gradient(circle at top left, rgba(14,165,233,.18), transparent 22%),
    linear-gradient(180deg, #0b1425 0%, #08111f 100%);
  color:#d7e1ef;
  position:relative;
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:-120px -60px auto auto;
  width:320px;
  height:320px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(124,58,237,.18) 0%, rgba(124,58,237,0) 65%);
}
.footer-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:24px;padding:34px 0;position:relative}
.footer-grid h3{color:#fff;margin-top:0;font-size:1.1rem}
.footer-links{display:grid;gap:8px}
.footer-links a{color:#d7e1ef}
.footer-links a:hover{color:#fff}
.footer-bottom{padding:0 0 28px;position:relative}
code{
  background:#eef5ff;
  padding:.2rem .45rem;
  border-radius:8px;
  border:1px solid #dbe9f8;
}

@media (max-width: 980px){
  .hero,.calc-layout,.feature-strip,.card-grid,.info-grid,.footer-grid,.stats-grid{grid-template-columns:1fr}
  .brand small{display:none}
  .hero h1{max-width:none}
}

@media (max-width: 760px){
  .menu-toggle{display:inline-flex}
  .main-nav{
    display:none;
    position:absolute;
    left:16px;
    right:16px;
    top:74px;
    background:#fff;
    padding:14px;
    border-radius:20px;
    border:1px solid var(--line);
    box-shadow:var(--shadow);
    flex-direction:column;
    align-items:stretch
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 14px}
  .container{width:min(1160px, calc(100% - 20px))}
  .hero-copy,.hero-box,.mini-feature,.card-body,.calc-panel,.result-panel,.info-box,.prose,.page-head,.stat-card{padding:20px}
  .hero{padding-top:22px}
  .hero-actions,.hero-highlights,.quick-links,.meta-pills{gap:8px}
  .button{width:100%}
  .button-secondary{width:100%}
  .pager{flex-direction:column}
}