.arc-404{min-height:100svh;padding:clamp(3rem, 8vw, 7rem) var(--page-margin,5vw);background:var(--surface-base,#071a1c);color:var(--text-body,#d7e3e1);grid-template-columns:1fr 1fr;align-content:center;gap:clamp(2rem,5vw,4rem);display:grid}.arc-404__panel{align-items:flex-start;gap:var(--space-sm,12px);text-align:start;flex-direction:column;display:flex}.arc-404__panel+.arc-404__panel{border-left:1px solid var(--line-subtle,#ffffff1f);padding-left:clamp(2rem,5vw,4rem)}@media (max-width:899.98px){.arc-404{grid-template-columns:1fr}.arc-404__panel+.arc-404__panel{border-left:0;padding-left:0}}.arc-404__kicker{font-family:var(--font-mono,monospace);font-size:var(--fs-caption,.78rem);letter-spacing:var(--tracking-caps,.14em);text-transform:uppercase;color:var(--text-gold,#e9c878)}.arc-404__headline{font-family:var(--font-display,serif);color:var(--text-strong,#f4f7f6);margin:0;font-size:clamp(1.9rem,4vw,3rem);line-height:1.15}.arc-404__lead{max-width:46ch;font-size:var(--fs-body,1rem);line-height:var(--lh-body,1.7);color:var(--text-muted,#a9bcb9);margin:0}.arc-404__cta{border:1px solid var(--line-gold,#e9c87866);border-radius:var(--radius-control,4px);font-family:var(--font-sans,system-ui);font-size:var(--fs-button,.95rem);color:var(--text-gold,#e9c878);transition:background var(--dur-fast,.2s) var(--ease-standard,ease), color var(--dur-fast,.2s) var(--ease-standard,ease);margin-block-start:var(--space-sm,12px);padding:12px 22px}.arc-404__cta:hover{background:var(--tint-gold,#e9c8781a);color:var(--text-strong,#f4f7f6)}