:root{--bg:#111827;--card:#1f2937;--border:#374151;--text:#f9fafb;--text-muted:#9ca3af;--accent:#3b82f6;--accent-hover:#2563eb;--success:#10b981;--error:#ef4444}*{box-sizing:border-box;margin:0;padding:0}body{min-height:100vh;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,segoe ui,Roboto,sans-serif;display:flex;flex-direction:column}body:not(.dashboard-layout){justify-content:center;align-items:center;padding:1rem}.card{width:100%;max-width:400px;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:2.5rem 2rem;box-shadow:0 10px 15px -3px rgba(0,0,0,.3),0 4px 6px -4px rgba(0,0,0,.3);text-align:center}.card h1{margin:0 0 .5rem;font-size:1.75rem;font-weight:700;letter-spacing:-.025em}.card .subtitle{color:var(--text-muted);font-size:.95rem;margin-bottom:2rem}.btn{display:inline-flex;justify-content:center;align-items:center;width:100%;padding:.85rem;font-size:1rem;font-weight:600;border-radius:10px;border:none;cursor:pointer;text-decoration:none;transition:background-color .15s ease,border-color .15s ease,transform .1s ease}.btn:active{transform:scale(.98)}.btn-secondary{background:#1f2937;color:#fff;border:1px solid var(--border)}.btn-secondary:hover{background:var(--accent);border-color:var(--accent)}.footer-text{margin-top:1.5rem;font-size:.9rem;color:var(--text-muted)}.message{margin-top:1.25rem;padding:.85rem 1rem;border-radius:10px;font-size:.9rem;line-height:1.4;text-align:left}.message.error{background:rgba(239,68,68,.1);border:1px solid rgba(239,68,68,.2);color:var(--error);display:block}