.four-main{justify-content:center;align-items:center;min-height:calc(100vh - 320px);display:flex;position:relative;overflow:hidden}.t-grid{background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);pointer-events:none;background-size:32px 32px;position:absolute;inset:0}@keyframes scan{0%{transform:translateY(-100%)}to{transform:translateY(200%)}}.scan-line{pointer-events:none;background:linear-gradient(90deg,#0000,#c0f95b1f 20%,#c0f95b40 50%,#c0f95b1f 80%,#0000);height:1px;animation:4s linear infinite scan;position:absolute;left:0;right:0}[data-theme=light] .scan-line{background:linear-gradient(90deg,#0000,#5e7e1e14 20%,#5e7e1e26 50%,#5e7e1e14 80%,#0000)}@media (prefers-reduced-motion:reduce){.scan-line,.idle-ring{animation:none!important}}.four-wrap{z-index:1;text-align:center;flex-direction:column;align-items:center;max-width:640px;padding:4rem 2rem;display:flex;position:relative}@keyframes idle-ring{0%,to{opacity:.15;transform:scale(1)}50%{opacity:.35;transform:scale(1.12)}}@keyframes idle-pulse{0%,to{opacity:.3}50%{opacity:.7}}.idle-node{width:64px;height:64px;margin-bottom:2.5rem;position:relative}.idle-node-core{background:var(--bg-raised);border:1.5px solid var(--border-strong);border-radius:999px;width:24px;height:24px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.idle-ring{border:1px solid var(--status-idle);opacity:.15;border-radius:999px;animation:2.8s ease-in-out infinite idle-ring;position:absolute;inset:-10px}.idle-ring-2{animation-delay:1.4s;inset:-18px}.idle-dot{background:var(--status-idle);border-radius:999px;width:6px;height:6px;animation:2.8s ease-in-out infinite idle-pulse;position:absolute;top:4px;right:4px}.status-code{font-family:var(--font-m);letter-spacing:.12em;text-transform:uppercase;color:var(--status-warn);margin-bottom:1.25rem;font-size:.75rem;font-weight:500}.status-sep{opacity:.4;margin:0 .5rem}.err-hl{font-family:var(--font-d);letter-spacing:-.03em;color:var(--text-primary);margin-bottom:.75rem;font-size:clamp(3.5rem,5vw,6rem);font-weight:700;line-height:1}.err-sub{color:var(--text-secondary);margin-bottom:.75rem;font-size:1rem;line-height:1.65}.trace-block{background:var(--bg-sunken);border:1px solid var(--border-subtle);font-family:var(--font-m);text-align:left;border-radius:6px;width:100%;margin:1.75rem 0;padding:1rem 1.25rem;font-size:.75rem;line-height:1.9}.tl{color:var(--text-muted)}.ts{color:var(--status-warn)}.tn{color:var(--text-secondary)}.td{color:var(--data)}.err-nav{flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;margin-top:.25rem;display:flex}.popular{border-top:1px solid var(--border-subtle);width:100%;margin-top:3rem;padding-top:2rem}.popular-label{font-family:var(--font-m);letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted);text-align:center;margin-bottom:1rem;font-size:.65rem;font-weight:500}.popular-links{flex-wrap:wrap;justify-content:center;gap:.5rem;display:flex}.pop-link{font-family:var(--font-m);letter-spacing:.04em;border:1px solid var(--border-subtle);color:var(--text-muted);transition:border-color var(--dur-fast),color var(--dur-fast),background var(--dur-fast);border-radius:999px;padding:.3rem .875rem;font-size:.7rem;font-weight:500;text-decoration:none}.pop-link:hover{border-color:var(--signal);color:var(--signal);background:#c0f95b0a}[data-theme=light] .pop-link:hover{background:#5e7e1e0a}