.topbar { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(18px); background: rgba(3, 7, 10, .72); border-bottom: 1px solid var(--line); }
.nav-shell { width: min(1180px, calc(100% - 32px)); margin: 0 auto; min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .8rem; text-decoration: none; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 14px; background: linear-gradient(135deg, rgba(53,244,189,.22), rgba(91,184,255,.14)); border: 1px solid var(--line-strong); color: var(--accent); font-weight: 800; }
.brand strong, .brand small { display:block; }
.brand small { color: var(--muted); margin-top: .1rem; }
.nav-links { display: flex; flex-wrap: wrap; gap: .45rem; justify-content: flex-end; }
.nav-links a { text-decoration: none; color: var(--muted); padding: .55rem .75rem; border-radius: 999px; border: 1px solid transparent; }
.nav-links a:hover { border-color: var(--line); color: var(--text); background: rgba(255,255,255,.04); }
.demo-hero { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(320px, .65fr); gap: 1.25rem; align-items: stretch; padding-top: 58px; }
.hero-copy { padding: 1rem 0; }
.eyebrow { display: inline-flex; align-items: center; gap: .5rem; color: var(--accent); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; }
.live-dot { width: .7rem; height: .7rem; border-radius: 50%; background: var(--accent); box-shadow: 0 0 18px var(--accent); }
h1 { margin: .8rem 0 1rem; font-size: clamp(2.15rem, 5vw, 4.7rem); line-height: .95; letter-spacing: -.05em; }
h2 { margin: 0; font-size: clamp(1.45rem, 3vw, 2.2rem); letter-spacing: -.03em; }
h3 { margin: 0; }
.hero-lead { color: var(--muted); font-size: 1.12rem; line-height: 1.7; max-width: 760px; }
.chip-row { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1.1rem; }
.chip-row span { border: 1px solid var(--line); color: var(--muted); padding: .48rem .7rem; border-radius: 999px; background: rgba(255,255,255,.035); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1rem; }
.content-grid, .demo-grid { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); gap: 1rem; }
.simulator-grid { grid-template-columns: minmax(320px, .85fr) minmax(0, 1.15fr); }
.footer { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 2rem 0 3rem; color: var(--subtle); display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; border-top: 1px solid var(--line); }
@media (max-width: 860px) { .demo-hero, .content-grid, .demo-grid, .simulator-grid { grid-template-columns: 1fr; } .nav-shell { align-items: flex-start; flex-direction: column; padding: .9rem 0; } .section-heading { align-items: stretch; flex-direction: column; } }