/* ─── NAV ─── */
nav{position:fixed;top:0;left:0;right:0;z-index:500;display:flex;align-items:center;justify-content:space-between;padding:1.1rem 4rem;background:rgba(3,4,5,0.8);backdrop-filter:blur(24px);border-bottom:1px solid var(--border);transition:border-color 0.3s}
nav.scrolled{border-bottom-color:rgba(0,229,200,0.15)}
.logo{font-family:var(--font-display);font-weight:800;font-size:1.25rem;letter-spacing:-0.03em;color:var(--white);text-decoration:none}
.logo em{font-style:normal;color:var(--cyan)}
.nav-links{display:flex;gap:2.5rem;list-style:none}
.nav-links a{font-family:var(--font-mono);font-size:0.68rem;color:var(--muted);text-decoration:none;letter-spacing:0.12em;text-transform:uppercase;transition:color 0.2s}
.nav-links a:hover{color:var(--cyan)}
.nav-right{display:flex;gap:0.8rem;align-items:center}
.btn-nav{font-family:var(--font-mono);font-size:0.68rem;letter-spacing:0.1em;text-transform:uppercase;padding:0.55rem 1.2rem;border:1px solid var(--border2);background:transparent;color:var(--text);cursor:pointer;text-decoration:none;transition:all 0.2s;display:inline-flex;align-items:center;line-height:1}
.btn-nav:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-nav-solid{background:var(--cyan);border-color:var(--cyan);color:var(--black);font-weight:500}
.btn-nav-solid:hover{background:var(--green);border-color:var(--green);color:var(--black)}