/* ============================================================
   REMANENCE AUDIO — shared design system
   True-neutral monochrome · Courier · instrument-panel precision
   ============================================================ */
:root{
  --void:#0d0d0d; --carbon:#141414; --iron:#1e1e1e; --graphite:#383838;
  --slate:#8e8e8e; --ash:#c0c0c0; --filament:#f4f4f4; --live:#e01010;
  --line:#2a2a2a; --line-soft:#1f1f1f;
  --mono:'Courier New',Courier,monospace;
  --maxw:1240px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--void); color:var(--filament);
  font-family:var(--mono); -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
::selection{background:#2a2a2a;color:var(--filament);}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px;}
.live{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--live);
      box-shadow:0 0 8px 1px rgba(212,0,0,.55);vertical-align:middle;flex:none;}
.blink{animation:blink 1.05s steps(1) infinite;}
@keyframes blink{50%{opacity:0;}}

/* ---------------- NAV ---------------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;
     background:rgba(13,13,13,.82);backdrop-filter:blur(10px);
     border-bottom:0.5px solid var(--line);}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 40px;height:70px;
           display:flex;align-items:center;justify-content:space-between;}
.nav-mark{font-size:16px;font-weight:700;letter-spacing:5px;color:var(--filament);}
.nav-mark .u{color:var(--filament);}
.nav-links{display:flex;align-items:center;gap:32px;}
.nav-link{font-size:12px;letter-spacing:3px;color:var(--slate);text-transform:uppercase;
          transition:color .25s;position:relative;padding:4px 0;}
.nav-link:hover{color:var(--filament);}
.nav-link.active{color:var(--filament);}
.nav-buy{font-size:12px;letter-spacing:3px;color:var(--filament);text-transform:uppercase;
         border:0.5px solid var(--graphite);padding:9px 18px;transition:.25s;}
.nav-buy:hover{background:var(--filament);color:var(--void);border-color:var(--filament);}
/* hamburger toggle — hidden on desktop */
.nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;
            width:38px;height:34px;border:0.5px solid var(--graphite);background:transparent;
            cursor:pointer;padding:0 9px;}
.nav-toggle span{display:block;height:1.5px;width:100%;background:var(--filament);transition:.25s;}
.nav.open .nav-toggle span:nth-child(1){transform:translateY(6.5px) rotate(45deg);}
.nav.open .nav-toggle span:nth-child(2){opacity:0;}
.nav.open .nav-toggle span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg);}

/* ---------------- shared section bits ---------------- */
.kicker{font-size:11.5px;letter-spacing:5px;color:var(--slate);text-transform:uppercase;}
.rule{height:0.5px;background:var(--line);border:none;}
.section{padding:120px 0;}
.eyebrow-num{font-size:11.5px;letter-spacing:3px;color:var(--slate);}

/* ---------------- FOOTER ---------------- */
.footer{border-top:0.5px solid var(--line);padding:64px 0 40px;background:var(--void);}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;align-items:start;}
.footer-mark{font-size:22px;font-weight:700;letter-spacing:6px;color:var(--filament);}
.footer-tag{font-size:12px;letter-spacing:3px;color:var(--slate);margin-top:14px;}
.footer-col h4{font-size:11px;letter-spacing:3px;color:var(--slate);text-transform:uppercase;margin-bottom:16px;font-weight:400;}
.footer-col a,.footer-col p{display:block;font-size:13.5px;letter-spacing:1.5px;color:var(--ash);margin-bottom:12px;transition:color .2s;}
.footer-col a:hover{color:var(--filament);}
.footer-base{display:flex;justify-content:space-between;align-items:center;
             margin-top:56px;padding-top:24px;border-top:0.5px solid var(--line-soft);
             font-size:10.5px;letter-spacing:3px;color:#6a6a6a;}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:12px;font-family:var(--mono);
     font-size:12.5px;letter-spacing:4px;text-transform:uppercase;cursor:pointer;
     padding:16px 28px;border:0.5px solid var(--graphite);background:transparent;
     color:var(--filament);transition:.25s;}
.btn:hover{background:var(--filament);color:var(--void);border-color:var(--filament);}
.btn-ghost{border-color:var(--line);color:var(--ash);}
.btn-ghost:hover{background:transparent;color:var(--filament);border-color:var(--graphite);}

/* background grid + ghost */
.bg-grid{position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(#ffffff05 0.5px,transparent 0.5px),linear-gradient(90deg,#ffffff05 0.5px,transparent 0.5px);
  background-size:64px 64px;}

@media(max-width:860px){
  .wrap,.nav-inner{padding:0 22px;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .nav-links{gap:18px;}
  .section{padding:84px 0;}
}

/* ---- mobile nav: collapse links into a dropdown ---- */
@media(max-width:640px){
  .nav-inner{height:62px;}
  .nav-toggle{display:flex;}
  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--carbon);border-bottom:0.5px solid var(--line);
    padding:6px 0;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .22s,transform .22s,visibility .22s;
  }
  .nav.open .nav-links{opacity:1;visibility:visible;transform:translateY(0);}
  .nav-link,.nav-buy{
    font-size:13px;letter-spacing:3px;padding:17px 24px;
    border:none;border-top:0.5px solid var(--line-soft);text-align:left;
  }
  .nav-link:first-child{border-top:none;}
  .nav-buy{color:var(--filament);}
  .nav-buy:hover{background:transparent;color:var(--filament);}
  .footer-base{flex-direction:column;align-items:flex-start;gap:10px;}
}