body{--bg-dark:#121212;--bg-card:#1e1e1e;--primary:#f60;--primary-hover:#e05500;--text-light:#f5f5f7;--text-muted:#a0a0a5;--success:#2e7d32;background-color:var(--bg-dark);color:var(--text-light);line-height:1.6;font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;padding:0}body,body *{box-sizing:border-box}.navigation-header{margin-bottom:30px}.btn-back{display:inline-flex;align-items:center;gap:8px;background-color:var(--bg-card);color:var(--text-light);padding:10px 20px;border-radius:6px;font-size:.95rem;font-weight:600;text-decoration:none;border:1px solid transparent;cursor:pointer;transition:all .2s ease}.btn-back:hover{background-color:var(--bg-dark);border-color:var(--primary);color:var(--primary);text-decoration:none}.btn-back .arrow{font-size:1.1rem;transition:transform .2s ease}.btn-back:hover .arrow{transform:translate(-4px)}