.btn{appearance:none;border:1px solid var(--border-color);background:var(--surface-2);color:var(--text-primary);border-radius:var(--border-radius-md);cursor:pointer;transition:var(--transition-button);justify-content:center;align-items:center;gap:.4rem;padding:10px 14px;font-size:.95rem;font-weight:600;line-height:1.2;text-decoration:none;display:inline-flex}.btn:hover{background:var(--surface-3)}.btn:focus-visible{outline:2px solid var(--accent-primary);outline-offset:2px}.btn:disabled,.btn.disabled{opacity:.55;cursor:not-allowed}.btn-sm{border-radius:var(--border-radius-sm);padding:6px 10px;font-size:.85rem}.btn-xs{border-radius:var(--border-radius-sm);padding:4px 8px;font-size:.78rem}.btn-primary{background:var(--accent-primary);color:#0b0d10;border-color:#0000}.btn-primary:hover{filter:brightness(1.05)}.btn-secondary{background:var(--surface-2);color:var(--text-secondary)}.btn-secondary:hover{background:var(--surface-3);color:var(--text-primary)}.btn-outline-primary{color:var(--accent-primary);border-color:var(--accent-primary);background:0 0}.btn-outline-primary:hover{background:#ffffff0a}.btn-ghost{border-color:var(--border-color);background:0 0}.btn-ghost:hover{background:var(--surface-3)}.btn-link{color:var(--accent-primary);background:0 0;border-color:#0000;text-decoration:underline}.btn-link:hover{color:var(--accent-secondary);text-decoration:underline}.btn-success{color:#061007;background:#22c55e;border-color:#22c55e}.btn-success:hover{filter:brightness(1.05)}.btn-danger{color:#160606;background:#ef4444;border-color:#ef4444}.btn-danger:hover{filter:brightness(1.05)}