/* Meridian Longevity — shared styles */
:root{
  --navy-900:#081019;--navy-850:#0a1320;--navy-800:#0d1826;--navy-700:#10202f;--navy-card:#0f1d2c;
  --teal:#2dd4bf;--teal-soft:#5eead4;--blue:#3b82f6;--ink:#e8eef5;--ink-mute:#8aa0b6;
  --line:rgba(45,212,191,.14);--line-soft:rgba(255,255,255,.07);--amber:#fbbf24;--glass:rgba(255,255,255,.04);--maxw:1160px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',-apple-system,system-ui,sans-serif;background:var(--navy-900);color:var(--ink);-webkit-font-smoothing:antialiased;line-height:1.65;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 26px}
.narrow{max-width:800px;margin:0 auto}
h1,h2,h3{letter-spacing:-.025em;line-height:1.1}
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:15px;padding:14px 28px;border-radius:12px;transition:transform .14s,background .14s,box-shadow .14s;white-space:nowrap}
.btn-primary{background:var(--teal);color:#04221e;box-shadow:0 8px 24px -8px rgba(45,212,191,.5)}
.btn-primary:hover{transform:translateY(-2px);background:var(--teal-soft);box-shadow:0 12px 30px -8px rgba(45,212,191,.6)}
.btn-ghost{background:var(--glass);border:1px solid rgba(255,255,255,.16);color:var(--ink);backdrop-filter:blur(8px)}
.btn-ghost:hover{border-color:var(--teal);color:var(--teal-soft)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;color:var(--teal-soft);background:rgba(45,212,191,.08);border:1px solid var(--line);border-radius:100px;padding:7px 16px}

/* NAV */
header.nav{position:sticky;top:0;z-index:50;background:rgba(8,16,25,.74);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px;max-width:var(--maxw);margin:0 auto;padding:0 26px}
.brand{display:flex;align-items:center;gap:11px}
.brand .mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--teal),var(--blue));display:grid;place-items:center;flex:none;box-shadow:0 0 18px -2px rgba(45,212,191,.5)}
.brand b{font-size:18px;font-weight:600}
.nav-links{display:flex;gap:26px}
.nav-links a{font-size:14.5px;color:var(--ink-mute);font-weight:500;transition:color .15s}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-login{font-size:14.5px;font-weight:550}
.menu-btn{display:none;font-size:24px;color:var(--ink)}

/* generic section */
section.block{padding:84px 0;position:relative}
.head{text-align:center;max-width:720px;margin:0 auto 48px}
.head h2{font-size:clamp(28px,4.2vw,44px);font-weight:800;margin:16px 0 14px}
.head p{font-size:17px;color:var(--ink-mute)}

/* page hero (interior) */
.phero{position:relative;padding:70px 0 30px;overflow:hidden}
.phero::before{content:"";position:absolute;inset:0;background:radial-gradient(660px 360px at 22% -10%,rgba(45,212,191,.13),transparent 60%);pointer-events:none}
.crumb{font-size:13px;color:var(--ink-mute);margin-bottom:18px;position:relative}
.crumb a:hover{color:var(--teal-soft)}
.phero h1{font-size:clamp(38px,6vw,60px);font-weight:800;letter-spacing:-.03em;position:relative}
.phero .sub{font-size:19px;color:var(--ink);font-weight:550;margin-top:12px;position:relative;max-width:680px}
.phero p.lede{color:var(--ink-mute);font-size:16.5px;margin-top:14px;max-width:680px;position:relative}

/* cards grid */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card{background:var(--navy-card);border:1px solid var(--line);border-radius:18px;padding:24px;transition:transform .16s,border-color .16s}
.card:hover{transform:translateY(-4px);border-color:rgba(45,212,191,.4)}
.card .ic{width:48px;height:48px;border-radius:13px;background:rgba(45,212,191,.1);border:1px solid var(--line);display:grid;place-items:center;margin-bottom:16px}
.card h3{font-size:18px;font-weight:600;margin-bottom:8px}
.card p{font-size:14.5px;color:var(--ink-mute)}
.card .arrow{margin-top:14px;font-size:13px;color:var(--teal);font-weight:600;display:inline-flex;align-items:center;gap:6px}

/* badges */
.badge-pill{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;color:var(--teal-soft);background:rgba(45,212,191,.08);border:1px solid var(--line);padding:7px 13px;border-radius:20px}
.stage{font-size:10.5px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;padding:4px 9px;border-radius:20px}
.stage.animal{background:rgba(251,191,36,.12);color:var(--amber)}
.stage.pre{background:rgba(59,130,246,.14);color:#93c5fd}
.stage.early{background:rgba(45,212,191,.12);color:var(--teal-soft)}
.stage.lim{background:rgba(251,191,36,.12);color:var(--amber)}

/* prose */
.prose p{color:var(--ink-mute);font-size:16px;margin-bottom:16px}
.prose h2{font-size:26px;font-weight:700;margin:34px 0 14px}
.prose h3{font-size:20px;font-weight:600;margin:24px 0 10px}
.prose ul{list-style:none;display:flex;flex-direction:column;gap:10px;margin:8px 0 18px}
.prose ul li{display:flex;gap:11px;font-size:15.5px;color:var(--ink-mute)}
.prose ul li svg{flex:none;margin-top:4px}
.prose strong{color:var(--ink)}

/* note */
.note{display:flex;gap:12px;align-items:flex-start;margin:24px 0;background:rgba(251,191,36,.06);border:1px solid rgba(251,191,36,.22);border-radius:14px;padding:16px 18px}
.note svg{flex:none;margin-top:1px}
.note p{font-size:13.5px;color:var(--ink-mute);line-height:1.55;margin:0}

/* FAQ */
.qa{background:var(--navy-card);border:1px solid var(--line);border-radius:13px;overflow:hidden;margin-bottom:10px}
.qa summary{list-style:none;cursor:pointer;padding:17px 20px;font-size:15.5px;font-weight:550;display:flex;justify-content:space-between;gap:14px;align-items:center}
.qa summary::-webkit-details-marker{display:none}
.qa .pl{width:18px;height:18px;flex:none;position:relative;transition:transform .2s}
.qa[open] .pl{transform:rotate(45deg)}
.qa .pl::before,.qa .pl::after{content:"";position:absolute;background:var(--teal);border-radius:2px}
.qa .pl::before{left:0;right:0;top:8px;height:2px}.qa .pl::after{top:0;bottom:0;left:8px;width:2px}
.qa .a{padding:0 20px 18px;font-size:14.5px;color:var(--ink-mute)}

/* CTA */
.cta{text-align:center;background:linear-gradient(135deg,#0e3a36,var(--navy-700));border:1px solid var(--line);border-radius:26px;padding:56px 40px;margin:46px 0}
.cta h2{font-size:clamp(28px,4vw,40px);font-weight:800;max-width:620px;margin:0 auto 14px}
.cta p{color:var(--ink-mute);max-width:540px;margin:0 auto 26px;font-size:16px}

/* evidence scale */
.evid{display:flex;flex-direction:column;gap:16px;background:var(--navy-card);border:1px solid var(--line);border-radius:18px;padding:26px}
.ev{display:grid;grid-template-columns:190px 1fr 90px;gap:16px;align-items:center}
.ev .name{font-size:14.5px;font-weight:550}
.ev .track{height:9px;background:var(--navy-700);border-radius:8px;overflow:hidden}
.ev .track i{display:block;height:100%;border-radius:8px;width:0;transition:width 1.1s cubic-bezier(.2,.7,.3,1)}
.ev .lvl{font-size:12.5px;font-weight:700;text-align:right}
.fill-ext{background:linear-gradient(90deg,var(--teal),var(--blue))}
.fill-grow{background:linear-gradient(90deg,var(--teal),#22d3ee)}
.fill-lim{background:linear-gradient(90deg,var(--amber),#f59e0b)}
.lvl.ext{color:var(--teal-soft)}.lvl.grow{color:#67e8f9}.lvl.lim{color:var(--amber)}

/* footer */
.disc{background:var(--navy-800);border-top:1px solid var(--line);padding:34px 0}
.disc p{font-size:12.5px;color:var(--ink-mute);line-height:1.7;max-width:var(--maxw);margin:0 auto}
footer{padding:44px 0;border-top:1px solid var(--line)}
.foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px;align-items:center;color:var(--ink-mute);font-size:13.5px}
.foot-links{display:flex;gap:20px;flex-wrap:wrap}
.foot-links a:hover{color:var(--ink)}

.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
*:focus-visible{outline:2px solid var(--teal);outline-offset:3px}

@media(max-width:920px){
  .nav-links,.nav-login{display:none}.menu-btn{display:block}
  .grid3,.grid2{grid-template-columns:1fr}
  section.block{padding:60px 0}
  .ev{grid-template-columns:120px 1fr 70px;gap:10px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto}}