*{margin:0;padding:0;box-sizing:border-box}
:root{--bg:#0a0b0f;--bg2:#11131a;--card:#161922;--card2:#1a1e28;--border:#232733;--border2:#2d3340;--text:#e8eaf0;--dim:#7a8190;--accent:#4f8cff;--hover:#6ba1ff;--green:#2ecc71;--red:#ff3b3b;--gold:#fdcb6e;--r:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;line-height:1.7;overflow-x:hidden}
.navbar{display:flex;justify-content:space-between;align-items:center;padding:.75rem 2rem;border-bottom:1px solid var(--border);position:sticky;top:0;background:rgba(10,11,15,.92);backdrop-filter:blur(12px);z-index:50}
.navbar .brand{font-weight:800;color:var(--text);text-decoration:none;font-size:1.05rem;display:flex;align-items:center;gap:.4rem}
.navbar .nav-links{display:flex;gap:1rem}
.navbar .nav-links a{color:var(--dim);text-decoration:none;font-size:.82rem;transition:color .2s;min-height:44px;display:inline-flex;align-items:center}
.navbar .nav-links a:hover,.navbar .nav-links a.active{color:var(--hover)}
main{max-width:1040px;margin:0 auto;padding:2.5rem 2rem 3rem}
h1{font-size:2.2rem;margin-bottom:.4rem;background:linear-gradient(135deg,#4f8cff,#6ba1ff,#55efc4);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.subtitle{color:var(--dim);font-size:1rem;margin-bottom:2rem}
h2{font-size:1.15rem;margin:1.5rem 0 .6rem;color:var(--hover)}
p{margin-bottom:.75rem}a{color:var(--hover)}
ul{margin:0 0 1rem 1.25rem}li{margin-bottom:.4rem}

/* Calculator card */
.tool-card{background:linear-gradient(180deg,var(--card),var(--card2));border:1px solid var(--border2);border-radius:var(--r);padding:2rem;margin-bottom:1.5rem;box-shadow:0 8px 32px rgba(0,0,0,.3)}
.input-row{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin-bottom:1.5rem}
.input-group label{display:block;font-size:.78rem;color:var(--dim);margin-bottom:.5rem;text-transform:uppercase;letter-spacing:.05em;font-weight:600}
.date-selects{display:flex;gap:.5rem}
.date-selects select{flex:1 1 0;min-width:0;background:var(--bg2);border:1px solid var(--border2);border-radius:10px;padding:.7rem .5rem;color:var(--text);font-size:.9rem;font-family:inherit;cursor:pointer;color-scheme:dark;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%237a8190' d='M6 8L0 0h12z'/></svg>");background-repeat:no-repeat;background-position:right .6rem center;padding-right:1.6rem;transition:border-color .15s}
.date-selects select:hover{border-color:var(--accent)}
.date-selects select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,140,255,.15)}
.date-selects select option{color:var(--text);background:var(--bg2)}
.btn-row{display:flex;gap:.6rem;flex-wrap:wrap}
.btn{background:linear-gradient(135deg,var(--accent),#3a78f0);color:#fff;border:none;border-radius:10px;padding:.75rem 1.8rem;font-size:.9rem;font-weight:600;cursor:pointer;transition:transform .1s,box-shadow .15s;font-family:inherit;min-height:44px;box-shadow:0 4px 14px rgba(79,140,255,.3)}
.btn:hover{box-shadow:0 6px 20px rgba(79,140,255,.45)}
.btn:active{transform:scale(.97)}
.btn-secondary{background:var(--bg2);border:1px solid var(--border2);box-shadow:none}
.btn-secondary:hover{background:var(--card);border-color:var(--border2);box-shadow:none}

/* Main result */
.result-main{background:linear-gradient(135deg,rgba(46,204,113,.12),rgba(79,140,255,.08));border:1px solid rgba(46,204,113,.3);border-radius:var(--r);padding:2.5rem 2rem;text-align:center;margin-bottom:1rem;display:none}
.result-main.show{display:block;animation:pop .35s cubic-bezier(.34,1.56,.64,1)}
.result-age{font-size:clamp(2.5rem,8vw,4rem);font-weight:800;color:var(--green);font-variant-numeric:tabular-nums;line-height:1}
.result-detail{color:var(--text);font-size:1.05rem;margin-top:.75rem;font-weight:500}

/* Next birthday */
.next-bday{background:linear-gradient(135deg,rgba(253,203,110,.1),transparent);border:1px solid var(--border2);border-left:4px solid var(--gold);border-radius:var(--r);padding:1.25rem 1.5rem;margin-bottom:1.5rem;display:none}
.next-bday.show{display:block;animation:pop .3s}
.next-bday .label{font-size:.75rem;color:var(--dim);text-transform:uppercase;letter-spacing:.06em;font-weight:600}
.next-bday .value{font-size:1.15rem;color:var(--gold);font-weight:600;margin-top:.3rem}

/* Stats grid - 3 cols x 2 rows */
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;margin:1rem 0}
.stat-card{background:var(--card);border:1px solid var(--border2);border-radius:14px;padding:1.25rem .75rem;text-align:center;display:flex;flex-direction:column;justify-content:center;min-width:0;transition:transform .15s,border-color .15s}
.stat-card:hover{transform:translateY(-2px);border-color:var(--accent)}
.stat-num{font-size:clamp(1.1rem,3.2vw,1.6rem);font-weight:800;font-variant-numeric:tabular-nums;color:var(--accent);line-height:1.15;overflow-wrap:anywhere;word-break:break-word}
.stat-card.green .stat-num{color:var(--green)}
.stat-card.gold .stat-num{color:var(--gold)}
.stat-card.red .stat-num{color:var(--red)}
.stat-label{font-size:.7rem;color:var(--dim);text-transform:uppercase;letter-spacing:.06em;margin-top:.5rem;font-weight:600}
.stats-note{text-align:center;color:var(--dim);font-size:.78rem;margin:-.3rem 0 1.5rem;opacity:.7}

/* Footer stats */
.stats-footer{text-align:center;margin:1.5rem 0;font-size:.78rem;color:var(--dim)}
.stats-footer strong{color:var(--hover);font-variant-numeric:tabular-nums}
.stat-divider{margin:0 .6rem;opacity:.4}
footer{text-align:center;padding:1.5rem 2rem;color:var(--dim);font-size:.75rem;border-top:1px solid var(--border)}
footer a{color:var(--hover);text-decoration:none}
.seo-section{color:var(--dim);font-size:.88rem;margin-top:2.5rem;line-height:1.8}
.seo-section h2{color:var(--text)}

@keyframes pop{0%{transform:scale(.92);opacity:0}100%{transform:scale(1);opacity:1}}

@media(max-width:760px){
  main{padding:2rem 1.25rem 3rem}
  .input-row{grid-template-columns:1fr;gap:1.25rem}
  .tool-card{padding:1.5rem 1.25rem}
  h1{font-size:1.7rem}
  .stats-grid{gap:.6rem}
  .stat-card{padding:1rem .5rem}
  .navbar{padding:.75rem 1.25rem}
}
@media(max-width:420px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}