.app-error,.app-error *{box-sizing:border-box}.app-error{--err-bg:#fafafa;--err-fg:#171717;--err-muted:#737373;--err-border:#e5e5e5;--err-accent:#171717;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color:var(--err-fg);background:var(--err-bg);min-height:100vh;margin:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1rem}.app-error__inner{max-width:36rem;width:100%;text-align:center}.app-error__kicker{font-size:clamp(2.5rem,8vw,5rem);font-weight:600;letter-spacing:-.02em;margin:0 0 1.5rem}.app-error__title{font-size:1.25rem;font-weight:600;margin:0 0 .5rem}.app-error__desc{margin:0 0 2rem;color:var(--err-muted);font-size:1.0625rem}.app-error__actions{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}.app-error__btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.625rem 1.25rem;font-size:.9375rem;font-weight:500;border-radius:.375rem;cursor:pointer;text-decoration:none;border:1px solid transparent;font-family:inherit}.app-error__btn--primary{background:var(--err-accent);color:#fff}.app-error__btn--secondary{background:#fff;color:var(--err-fg);border-color:var(--err-border)}.app-error__btn:disabled{opacity:.6;cursor:not-allowed}