*{box-sizing:border-box}body{margin:0;min-height:100vh;display:flex;flex-direction:column;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:radial-gradient(circle at top left,rgba(6,182,212,.20),transparent 28%),radial-gradient(circle at top right,rgba(139,92,246,.22),transparent 32%),linear-gradient(180deg,#020617 0%,#06111f 100%)}.gradient-text{background:linear-gradient(90deg,var(--cyan),var(--purple));-webkit-background-clip:text;background-clip:text;color:transparent}.error-wrap{flex:1;display:flex;align-items:center;justify-content:center;padding:120px 0 70px}.error-card{max-width:860px;width:100%;background:rgba(15,23,42,.84);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);padding:3rem 2rem;text-align:center;position:relative;overflow:hidden}.error-card::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(6,182,212,.12),rgba(139,92,246,.14));pointer-events:none}.error-card>*{position:relative;z-index:1}.error-code{font-size:clamp(4rem,11vw,8rem);line-height:1;font-weight:900;margin-bottom:1rem;letter-spacing:-2px}.error-badge{display:inline-block;padding:.5rem .9rem;border-radius:999px;border:1px solid rgba(6,182,212,.34);background:rgba(6,182,212,.08);color:#a5f3fc;font-weight:700;margin-bottom:1rem}.error-card p{color:var(--muted);font-size:1.05rem;line-height:1.85;margin-bottom:1.5rem}.quick-links{display:flex;flex-wrap:wrap;gap:.85rem;justify-content:center;margin-top:1.25rem}.btn-gradient{display:inline-block;text-decoration:none;color:var(--text-light);font-weight:700;padding:.95rem 1.4rem;border-radius:14px;background:linear-gradient(90deg,var(--cyan),var(--purple));box-shadow:0 12px 28px rgba(139,92,246,.24)}.btn-darkline{display:inline-block;text-decoration:none;color:#e2e8f0;font-weight:700;padding:.95rem 1.4rem;border-radius:14px;border:1px solid rgba(148,163,184,.28);background:rgba(15,23,42,.7)}.helper-grid{margin-top:2rem;text-align:left}.helper-item{background:rgba(2,6,23,.35);border:1px solid rgba(148,163,184,.18);border-radius:18px;padding:1.1rem 1rem;height:100%}.helper-item h3{font-size:1.02rem;margin-bottom:.5rem;color:#e2e8f0;font-weight:800}.helper-item p{margin:0;font-size:.96rem;line-height:1.7}