/* ============================================================
   Age & Date Calculator — Design System
   Deep Navy · Electric Blue · Sky · White
   ============================================================ */

:root{
  --navy:#071B3F;
  --navy-2:#0C2A63;
  --blue:#1E63F5;
  --blue-d:#1D4ED8;
  --blue-l:#3B82F6;
  --sky:#38BDF8;
  --ice:#EAF2FF;
  --ice-2:#F4F8FF;
  --white:#FFFFFF;
  --ink:#0A1B3A;
  --ink-2:#1B2E4F;
  --muted:#5D6E8C;
  --line:rgba(10,27,58,.09);
  --line-2:rgba(10,27,58,.14);
  --grad:linear-gradient(135deg,#0C2A63 0%,#1E63F5 62%,#38BDF8 130%);
  --grad-2:linear-gradient(135deg,#1E63F5 0%,#1D4ED8 55%,#0C2A63 130%);
  --shadow-s:0 6px 18px rgba(10,27,58,.06);
  --shadow-m:0 18px 40px rgba(10,27,58,.09);
  --shadow-l:0 30px 70px rgba(10,27,58,.14);
  --r-s:14px;--r-m:20px;--r-l:26px;
  --max:1140px;
  --font:"Plus Jakarta Sans","Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--white);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.15;letter-spacing:-.02em;font-weight:800;color:var(--ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(30,99,245,.45);outline-offset:3px;border-radius:8px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 22px}
.hidden{display:none !important}
.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}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  border:0;cursor:pointer;font-weight:800;font-size:15.5px;letter-spacing:-.01em;
  padding:15px 28px;border-radius:99px;transition:transform .2s ease,box-shadow .25s ease,background .25s ease,color .2s;
  text-align:center;
}
.btn-primary{
  color:#fff;background:var(--grad-2);
  box-shadow:0 14px 30px rgba(30,99,245,.30);
}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 20px 40px rgba(30,99,245,.38)}
.btn-primary:active{transform:translateY(-1px)}
.btn-ghost{
  color:var(--navy);background:#fff;border:1px solid var(--line-2);box-shadow:var(--shadow-s);
}
.btn-ghost:hover{transform:translateY(-3px);color:var(--blue);border-color:rgba(30,99,245,.35);box-shadow:0 16px 34px rgba(10,27,58,.12)}
.btn-lg{padding:17px 34px;font-size:16.5px}
.btn-block{width:100%}
.btn .ic{width:18px;height:18px;flex:0 0 auto}

/* ---------------- Navbar ---------------- */
.nav-wrap{position:sticky;top:14px;z-index:80;padding:0 16px;margin-bottom:-70px}
.nav{
  max-width:var(--max);margin:0 auto;display:flex;align-items:center;gap:18px;
  background:rgba(255,255,255,.76);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border:1px solid rgba(255,255,255,.85);box-shadow:0 12px 34px rgba(10,27,58,.10);
  border-radius:99px;padding:10px 12px 10px 16px;
}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand-mark{
  width:38px;height:38px;border-radius:12px;background:var(--grad-2);color:#fff;
  display:grid;place-items:center;flex:0 0 auto;box-shadow:0 8px 18px rgba(30,99,245,.35);
}
.brand-mark svg{width:20px;height:20px}
.brand-txt{font-weight:800;font-size:14.5px;letter-spacing:.4px;line-height:1.2;color:var(--navy);white-space:nowrap}
.brand-txt span{display:block;font-size:9.5px;font-weight:700;letter-spacing:2.4px;color:var(--blue);text-transform:uppercase}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  padding:10px 16px;border-radius:99px;font-size:14.5px;font-weight:700;color:var(--ink-2);
  transition:.2s;white-space:nowrap;
}
.nav-link:hover{color:var(--blue);background:rgba(30,99,245,.08)}
.nav-link.active{color:#fff;background:var(--grad-2);box-shadow:0 8px 18px rgba(30,99,245,.3)}
.nav-tools{
  font-size:13px;font-weight:700;color:var(--blue);padding:9px 14px;border-radius:99px;
  border:1px dashed rgba(30,99,245,.4);white-space:nowrap;transition:.2s;
}
.nav-tools:hover{background:rgba(30,99,245,.08)}
.nav-toggle{
  display:none;margin-left:auto;width:44px;height:44px;border-radius:14px;border:1px solid var(--line);
  background:#fff;cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:4px;padding:0;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--navy);border-radius:2px;transition:.25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-menu{
  display:none;position:absolute;top:calc(100% + 10px);left:16px;right:16px;
  background:rgba(255,255,255,.96);backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.9);
  border-radius:22px;box-shadow:var(--shadow-l);padding:12px;flex-direction:column;gap:4px;
}
.nav-menu.open{display:flex}
.nav-menu .nav-link{padding:14px 16px;font-size:15.5px}
.nav-menu .nav-tools{padding:14px 16px;text-align:center;border-style:dashed;font-size:14px}

/* ---------------- Hero ---------------- */
.hero{position:relative;padding:150px 0 90px;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.glow{position:absolute;border-radius:50%;filter:blur(70px);opacity:.55}
.glow-1{width:520px;height:520px;top:-190px;left:-140px;background:radial-gradient(circle,#93C5FD 0%,rgba(147,197,253,0) 70%)}
.glow-2{width:560px;height:560px;top:-120px;right:-180px;background:radial-gradient(circle,#BFDBFE 0%,rgba(191,219,254,0) 70%)}
.glow-3{width:600px;height:420px;bottom:-260px;left:35%;background:radial-gradient(circle,#DBEAFE 0%,rgba(219,234,254,0) 72%)}
.grid-lines{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(30,99,245,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(30,99,245,.055) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 78% 62% at 50% 34%,#000 40%,transparent 100%);
  mask-image:radial-gradient(ellipse 78% 62% at 50% 34%,#000 40%,transparent 100%);
}
.ring{position:absolute;border-radius:50%;border:1px solid rgba(30,99,245,.16)}
.ring::after{content:"";position:absolute;width:9px;height:9px;border-radius:50%;background:var(--blue);top:-4.5px;left:calc(50% - 4.5px);box-shadow:0 0 0 5px rgba(30,99,245,.14)}
.ring-1{width:260px;height:260px;top:110px;right:6%}
.ring-2{width:150px;height:150px;bottom:40px;left:4%;border-style:dashed;border-color:rgba(30,99,245,.22)}

.timeline{position:absolute;left:0;right:0;bottom:0;height:1px;background:linear-gradient(90deg,transparent,rgba(30,99,245,.25),transparent)}
.hero-inner{position:relative;text-align:center;max-width:900px;margin:0 auto}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;background:#fff;border:1px solid var(--line);
  border-radius:99px;padding:8px 18px;font-size:12.5px;font-weight:800;letter-spacing:1.6px;
  text-transform:uppercase;color:var(--blue);box-shadow:var(--shadow-s);
}
.hero-badge i{width:8px;height:8px;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px rgba(30,99,245,.15);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 4px rgba(30,99,245,.15)}50%{box-shadow:0 0 0 9px rgba(30,99,245,0)}}
.hero h1{
  font-size:clamp(38px,6.6vw,70px);font-weight:800;letter-spacing:-.035em;margin:26px 0 0;
}
.grad-text{background:linear-gradient(100deg,#1E63F5 0%,#0C2A63 55%,#38BDF8 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin:24px auto 0;max-width:720px;color:var(--muted);font-size:clamp(15.5px,1.7vw,18.5px);line-height:1.7}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:38px}
.hero-trust{margin-top:34px;display:flex;gap:26px;justify-content:center;flex-wrap:wrap;color:var(--muted);font-size:13.5px;font-weight:700}
.hero-trust span{display:inline-flex;align-items:center;gap:8px}
.hero-trust svg{width:16px;height:16px;color:var(--blue)}

/* ---------------- Sections ---------------- */
.section{padding:74px 0}
.section-tint{background:linear-gradient(180deg,#fff 0%,var(--ice-2) 45%,#fff 100%)}
.section-head{text-align:center;max-width:720px;margin:0 auto 52px}
.eyebrow{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:2.4px;text-transform:uppercase;
  color:var(--blue);background:rgba(30,99,245,.09);border-radius:99px;padding:7px 16px;
}
.section-title{font-size:clamp(28px,4vw,42px);margin-top:18px;letter-spacing:-.03em}
.section-sub{margin-top:16px;color:var(--muted);font-size:16.5px;line-height:1.7}

/* ---------------- Feature highlights ---------------- */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:26px 22px;
  box-shadow:var(--shadow-s);transition:.25s;
}
.feature:hover{transform:translateY(-6px);box-shadow:var(--shadow-m);border-color:rgba(30,99,245,.28)}
.feature-ic{
  width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,var(--ice),#fff);
  border:1px solid rgba(30,99,245,.16);display:grid;place-items:center;color:var(--blue);margin-bottom:16px;
}
.feature-ic svg{width:22px;height:22px}
.feature h3{font-size:17.5px;letter-spacing:-.02em}
.feature p{margin-top:7px;color:var(--muted);font-size:14.5px;line-height:1.6}

/* ---------------- Tool cards ---------------- */
.tools{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.tool-card{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-l);
  padding:38px 34px;box-shadow:var(--shadow-m);overflow:hidden;transition:.3s;display:flex;flex-direction:column;
}
.tool-card::before{
  content:"";position:absolute;width:280px;height:280px;border-radius:50%;top:-150px;right:-120px;
  background:radial-gradient(circle,rgba(30,99,245,.16) 0%,rgba(30,99,245,0) 70%);transition:.35s;
}
.tool-card.alt::before{background:radial-gradient(circle,rgba(56,189,248,.20) 0%,rgba(56,189,248,0) 70%)}
.tool-card:hover{transform:translateY(-8px);box-shadow:0 34px 70px rgba(10,27,58,.18);border-color:rgba(30,99,245,.3)}
.tool-card:hover::before{transform:scale(1.2)}
.tool-ic{
  width:64px;height:64px;border-radius:20px;background:var(--grad-2);color:#fff;display:grid;place-items:center;
  box-shadow:0 16px 32px rgba(30,99,245,.34);position:relative;
}
.tool-card.alt .tool-ic{background:linear-gradient(135deg,#0EA5E9,#1E63F5);box-shadow:0 16px 32px rgba(14,165,233,.34)}
.tool-ic svg{width:30px;height:30px}
.tool-tag{
  position:absolute;top:34px;right:34px;font-size:11.5px;font-weight:800;letter-spacing:1.6px;
  text-transform:uppercase;color:var(--blue);background:rgba(30,99,245,.09);padding:7px 14px;border-radius:99px;
}
.tool-card.alt .tool-tag{color:#0284C7;background:rgba(14,165,233,.11)}
.tool-card h3{font-size:26px;margin-top:24px;letter-spacing:-.03em;position:relative}
.tool-card p{margin-top:14px;color:var(--muted);font-size:15.5px;line-height:1.7;position:relative;flex:1}
.tool-btn{
  margin-top:28px;align-self:flex-start;display:inline-flex;align-items:center;gap:10px;
  background:var(--navy);color:#fff;border-radius:99px;padding:14px 26px;font-weight:800;font-size:15px;
  transition:.25s;position:relative;
}
.tool-card:hover .tool-btn{background:var(--grad-2);box-shadow:0 16px 32px rgba(30,99,245,.34)}
.tool-card.alt .tool-btn{background:#0284C7}
.tool-card.alt:hover .tool-btn{background:linear-gradient(135deg,#0EA5E9,#1D4ED8)}
.tool-btn .ar{transition:.25s}
.tool-card:hover .tool-btn .ar{transform:translateX(5px)}

/* ---------------- How it works ---------------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;position:relative}
.steps::before{
  content:"";position:absolute;top:38px;left:16%;right:16%;height:2px;
  background-image:linear-gradient(90deg,rgba(30,99,245,.35) 55%,transparent 0);
  background-size:14px 2px;background-repeat:repeat-x;
}
.step{position:relative;text-align:center;background:transparent}
.step-num{
  width:76px;height:76px;margin:0 auto 22px;border-radius:50%;background:#fff;
  border:1px solid rgba(30,99,245,.25);display:grid;place-items:center;position:relative;z-index:1;
  font-weight:800;font-size:20px;color:var(--blue);box-shadow:0 14px 30px rgba(10,27,58,.10);
}
.step h3{font-size:19px}
.step p{margin-top:10px;color:var(--muted);font-size:15px;line-height:1.65;max-width:300px;margin-left:auto;margin-right:auto}

/* ---------------- Footer ---------------- */
.footer{background:var(--navy);color:#fff;padding:64px 0 26px;margin-top:70px;position:relative;overflow:hidden}
.footer::before{
  content:"";position:absolute;width:520px;height:520px;border-radius:50%;top:-260px;right:-160px;
  background:radial-gradient(circle,rgba(56,189,248,.22) 0%,rgba(56,189,248,0) 70%);
}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;position:relative}
.footer h3{font-size:21px;color:#fff;letter-spacing:-.02em}
.footer .fdesc{margin-top:14px;color:rgba(255,255,255,.68);font-size:15px;line-height:1.7;max-width:340px}
.footer h4{font-size:12.5px;letter-spacing:2px;text-transform:uppercase;color:var(--sky);font-weight:800}
.footer ul{margin-top:18px;display:flex;flex-direction:column;gap:11px}
.footer ul a{color:rgba(255,255,255,.76);font-size:15px;font-weight:600;transition:.2s}
.footer ul a:hover{color:#fff;padding-left:5px}
.footer-bottom{
  margin-top:46px;padding-top:22px;border-top:1px solid rgba(255,255,255,.13);
  text-align:center;color:rgba(255,255,255,.55);font-size:13.5px;position:relative;
}

/* ---------------- Calculator panel ---------------- */
.panel{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-l);
  box-shadow:var(--shadow-l);padding:40px;position:relative;overflow:hidden;
}
.panel::before{
  content:"";position:absolute;height:5px;left:0;right:0;top:0;
  background:linear-gradient(90deg,#0C2A63,#1E63F5,#38BDF8);
}
.panel-head{text-align:center;margin-bottom:32px}
.panel-head .p-ic{
  width:64px;height:64px;margin:0 auto 20px;border-radius:20px;background:var(--grad-2);color:#fff;
  display:grid;place-items:center;box-shadow:0 16px 32px rgba(30,99,245,.34);
}
.panel-head .p-ic svg{width:30px;height:30px}
.panel-head h1{font-size:clamp(26px,3.6vw,36px);letter-spacing:-.03em}
.panel-head p{margin-top:12px;color:var(--muted);font-size:16px}

.form-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:18px;align-items:end}
.field label,.field .flabel{
  display:block;font-size:12.5px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase;
  color:var(--muted);margin-bottom:10px;
}
.input-shell{position:relative;display:flex;align-items:center}
.input-shell svg{position:absolute;left:16px;width:19px;height:19px;color:var(--blue);pointer-events:none;opacity:.85}
.field input{
  width:100%;padding:16px 16px 16px 46px;font-size:16.5px;font-weight:600;color:var(--ink);
  background:var(--ice-2);border:2px solid transparent;border-radius:16px;transition:.2s;outline:none;
}
.field input::placeholder{color:#93A3BD;font-weight:500}
.field input:focus{background:#fff;border-color:var(--blue-l);box-shadow:0 0 0 5px rgba(59,130,246,.16)}
.field input[type=date]{padding-left:46px;min-height:56px}
.field input[type=date]::-webkit-calendar-picker-indicator{cursor:pointer;opacity:.6}
.hint{margin-top:10px;font-size:13.5px;color:var(--muted);font-weight:600;min-height:20px}
.hint b{color:var(--blue)}
.hint .bad{color:#DC2626}
.vs-badge{
  width:52px;height:52px;border-radius:50%;background:#fff;border:1px solid var(--line-2);
  display:grid;place-items:center;color:var(--blue);font-weight:800;box-shadow:var(--shadow-s);
  margin-bottom:6px;
}
.vs-badge svg{width:24px;height:24px}
.form-actions{margin-top:26px;display:flex;justify-content:center;gap:14px;flex-wrap:wrap}
.err{
  margin-top:18px;color:#B91C1C;background:#FEF2F2;border:1px solid #FECACA;
  padding:14px 18px;border-radius:14px;font-size:15px;font-weight:700;display:none;
}
.err.show{display:block}

/* ---------------- Results ---------------- */
.results{display:flex;flex-direction:column;gap:24px;margin-top:34px}
.fade-in{animation:fadeUp .55s cubic-bezier(.2,.75,.25,1) both}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  html{scroll-behavior:auto}
}

.exact{
  position:relative;overflow:hidden;border-radius:var(--r-l);background:var(--grad-2);color:#fff;
  padding:38px 36px;box-shadow:0 30px 64px rgba(12,42,99,.34);
}
.exact::before,.exact::after{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.10)}
.exact::before{width:300px;height:300px;top:-140px;right:-90px}
.exact::after{width:190px;height:190px;bottom:-110px;left:8%}
.exact .lbl{position:relative;font-size:12.5px;letter-spacing:2.6px;text-transform:uppercase;font-weight:800;opacity:.85}
.exact-nums{position:relative;display:flex;gap:34px;flex-wrap:wrap;margin-top:20px}
.exact-nums .unit{min-width:110px}
.exact-nums .n{font-size:clamp(44px,7vw,68px);font-weight:800;letter-spacing:-.04em;line-height:1}
.exact-nums .u{font-size:14.5px;font-weight:700;letter-spacing:1.6px;text-transform:uppercase;opacity:.82;margin-top:8px}
.exact .born{position:relative;margin-top:26px;padding-top:20px;border-top:1px solid rgba(255,255,255,.25);font-size:16.5px;font-weight:700}
.exact .born span{opacity:.8;font-weight:600}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:20px}
.stats-3{grid-template-columns:repeat(3,1fr)}
.stats-4{grid-template-columns:repeat(4,1fr)}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:26px 24px;
  box-shadow:var(--shadow-s);transition:.25s;
}
.stat:hover{transform:translateY(-5px);box-shadow:var(--shadow-m);border-color:rgba(30,99,245,.3)}
.stat-ic{
  width:44px;height:44px;border-radius:13px;background:linear-gradient(135deg,var(--ice),#fff);
  border:1px solid rgba(30,99,245,.16);display:grid;place-items:center;color:var(--blue);margin-bottom:16px;
}
.stat-ic svg{width:21px;height:21px}
.stat h3{font-size:13px;letter-spacing:1.6px;text-transform:uppercase;color:var(--muted);font-weight:800}
.stat .v{font-size:34px;font-weight:800;letter-spacing:-.03em;color:var(--navy);margin-top:12px;line-height:1.1}
.stat .v small{font-size:16px;font-weight:700;color:var(--blue);letter-spacing:0}
.stat .d{margin-top:10px;color:var(--muted);font-size:14.5px;line-height:1.6}

.next-bday{
  position:relative;overflow:hidden;border-radius:var(--r-l);background:var(--grad);color:#fff;
  padding:38px 36px;box-shadow:0 30px 64px rgba(30,99,245,.34);
  display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap;
}
.next-bday::after{
  content:"";position:absolute;width:340px;height:340px;border-radius:50%;border:1px solid rgba(255,255,255,.25);
  top:-120px;right:-70px;
}
.nb-title{position:relative;font-size:clamp(24px,3.4vw,34px);font-weight:800;letter-spacing:-.03em}
.nb-days{position:relative;font-size:clamp(44px,7vw,72px);font-weight:800;letter-spacing:-.04em;line-height:1;margin-top:14px}
.nb-days small{font-size:.34em;letter-spacing:2px;text-transform:uppercase;font-weight:800;opacity:.85;margin-left:8px}
.nb-line{position:relative;margin-top:16px;font-size:16.5px;font-weight:600;color:rgba(255,255,255,.9)}
.nb-badge{
  position:relative;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);
  border-radius:20px;padding:24px 30px;text-align:center;backdrop-filter:blur(8px);min-width:210px;
}
.nb-badge .cake{font-size:44px;line-height:1}
.nb-badge .t{margin-top:10px;font-size:12.5px;letter-spacing:1.8px;text-transform:uppercase;font-weight:800;opacity:.9}
.nb-badge .d{margin-top:8px;font-size:17px;font-weight:800}
.nb-progress{
  position:relative;margin-top:22px;height:9px;border-radius:99px;
  background:rgba(255,255,255,.22);overflow:hidden;max-width:520px;
}
.nb-progress span{
  display:block;height:100%;border-radius:99px;background:#fff;
  box-shadow:0 0 14px rgba(255,255,255,.7);transition:width .9s cubic-bezier(.2,.75,.25,1);
}
.nb-progress-lbl{
  position:relative;margin-top:10px;font-size:13px;font-weight:700;letter-spacing:.6px;
  text-transform:uppercase;opacity:.78;
}

.summary{background:#fff;border:1px solid var(--line);border-radius:var(--r-l);box-shadow:var(--shadow-m);padding:36px 34px}
.summary h2{font-size:clamp(23px,3vw,30px);letter-spacing:-.03em}
.sum-rows{margin-top:24px;display:grid;grid-template-columns:repeat(2,1fr);gap:2px 34px}
.sum-row{
  display:flex;justify-content:space-between;gap:16px;align-items:center;
  padding:15px 4px;border-bottom:1px dashed var(--line-2);font-size:15.5px;
}
.sum-row .k{color:var(--muted);font-weight:700}
.sum-row .v{color:var(--navy);font-weight:800;text-align:right}
.sum-actions{margin-top:28px;display:flex;justify-content:center;gap:14px;flex-wrap:wrap}

/* ---------------- Age difference ---------------- */
.diff-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.person{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:26px;box-shadow:var(--shadow-m);
}
.person .p-tag{
  display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:800;letter-spacing:1.6px;
  text-transform:uppercase;color:var(--blue);background:rgba(30,99,245,.09);padding:7px 15px;border-radius:99px;
}
.person h3{font-size:21px;margin-top:16px;letter-spacing:-.02em}
.person .field{margin-top:20px}
.person-details{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:6px}
.detail{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-m);padding:24px;box-shadow:var(--shadow-s);
  display:flex;gap:16px;align-items:flex-start;transition:.25s;
}
.detail:hover{transform:translateY(-4px);box-shadow:var(--shadow-m);border-color:rgba(30,99,245,.3)}
.detail .d-ic{
  width:46px;height:46px;border-radius:14px;flex:0 0 auto;display:grid;place-items:center;color:#fff;
  background:var(--grad-2);box-shadow:0 12px 24px rgba(30,99,245,.3);
}
.detail.alt .d-ic{background:linear-gradient(135deg,#0EA5E9,#1E63F5)}
.detail .d-ic svg{width:22px;height:22px}
.detail h4{font-size:12.5px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);font-weight:800}
.detail .dv{font-size:20px;font-weight:800;color:var(--navy);margin-top:7px;letter-spacing:-.02em}
.detail .ds{font-size:13.5px;color:var(--muted);margin-top:4px;font-weight:600}
.who{
  position:relative;overflow:hidden;border-radius:var(--r-l);background:var(--navy);color:#fff;
  padding:30px 34px;display:flex;align-items:center;gap:20px;box-shadow:0 26px 56px rgba(7,27,63,.32);
}
.who::after{content:"";position:absolute;width:300px;height:300px;border-radius:50%;right:-90px;top:-130px;
  background:radial-gradient(circle,rgba(56,189,248,.30) 0%,rgba(56,189,248,0) 70%)}
.who .w-ic{
  width:56px;height:56px;border-radius:16px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);
  display:grid;place-items:center;flex:0 0 auto;position:relative;
}
.who .w-ic svg{width:26px;height:26px}
.who .w-t{position:relative;font-size:clamp(18px,2.6vw,24px);font-weight:800;letter-spacing:-.02em}
.who .w-s{position:relative;margin-top:6px;color:rgba(255,255,255,.75);font-size:15px;font-weight:600}

/* ---------------- Content pages ---------------- */
.prose{max-width:820px}
.prose h2{font-size:24px;margin-top:36px;letter-spacing:-.02em}
.prose h2:first-child{margin-top:0}
.prose p{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.8}
.prose ul{margin-top:14px;display:flex;flex-direction:column;gap:10px}
.prose li{position:relative;padding-left:26px;color:var(--muted);font-size:16px;line-height:1.7}
.prose li::before{content:"";position:absolute;left:4px;top:11px;width:7px;height:7px;border-radius:50%;background:var(--blue)}

/* ---------------- Responsive ---------------- */
@media (max-width:1020px){
  .features{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .nav-links,.nav-tools{display:none}
  .nav-toggle{display:flex}
  .tools{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:34px}
  .steps::before{display:none}
  .form-grid{grid-template-columns:1fr;gap:14px}
  .diff-grid{grid-template-columns:1fr}
  .vs-badge{margin:2px auto}
  .sum-rows{grid-template-columns:1fr}
  .person-details{grid-template-columns:1fr}
  .stats-3,.stats-4{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .nav-wrap{top:10px;padding:0 12px}
  .nav-menu{left:12px;right:12px}
  .brand-txt{font-size:13px;letter-spacing:.2px}
  .hero{padding:130px 0 66px}
  .hero-actions .btn{width:100%}
  .hero-trust{gap:14px;flex-direction:column;align-items:center}
  .features{grid-template-columns:1fr}
  .section{padding:56px 0}
  .panel{padding:28px 20px;border-radius:22px}
  .exact,.next-bday{padding:28px 22px}
  .exact-nums{gap:22px}
  .exact-nums .unit{min-width:84px}
  .next-bday{flex-direction:column;align-items:flex-start}
  .nb-badge{width:100%;text-align:left;display:flex;align-items:center;gap:16px}
  .nb-badge .t,.nb-badge .d{margin-top:0}
  .summary,.who{padding:26px 20px}
  .stat{padding:20px 18px}
  .stat .v{font-size:27px}
  .stat .v small{font-size:14px}
  .stats-3,.stats-4{gap:16px}
  .detail{padding:20px 18px}
  .tool-card{padding:30px 24px}
  .tool-tag{position:static;display:inline-block;margin-bottom:6px;align-self:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .ring-1{right:-90px}
  .container{padding:0 16px}
}
@media (max-width:420px){
  .btn{padding:14px 22px;font-size:15px}
}